Method and system for high-temperature detection of activated carbon and cooling and extinguishing of spontaneous combustion activated carbon

文档序号：608710 发布日期：2021-05-07 浏览：6次中文

阅读说明：本技术 一种活性炭高温检测及自燃活性炭冷却熄灭的方法和系统 (Method and system for high-temperature detection of activated carbon and cooling and extinguishing of spontaneous combustion activated carbon ) 是由刘雁飞于 2021-01-08 设计创作，主要内容包括：一种活性炭高温检测及自燃活性炭冷却熄灭的方法,该方法包括：1)热成像仪(1)对进入振动筛(2)上成像区(3)内的物料进行实时拍摄,得到热成像图像；2)根据所述热成像图像分析判断进入成像区(3)内的物料是否具有高温点；2a)若判断所述热成像图像不具有高温点,则重复步骤1)；2b)若判断所述热成像图像具有高温点,记录该高温点处的物料在振动筛(2)上成像区(3)内的发现位置；3)当所述高温点处的物料移动至输送机(5)上,对相应高温物料进行喷水降温处理。本发明在活性炭烟气净化装置的筛分环节检测出自燃的高温活性炭,并能对其进行定位和处理,解决了高温活性炭颗粒难以全面检测和处置的问题,提高了系统的安全性。(A method for detecting the high temperature of activated carbon and quenching the spontaneous combustion activated carbon by cooling comprises the following steps: 1) the thermal imaging instrument (1) shoots materials entering an imaging area (3) on the vibrating screen (2) in real time to obtain a thermal imaging image; 2) analyzing and judging whether the material entering the imaging area (3) has a high temperature point or not according to the thermal imaging image; 2a) if the thermal imaging image does not have the high temperature point, repeating the step 1); 2b) if the thermal imaging image is judged to have a high temperature point, recording the found position of the material at the high temperature point in the imaging area (3) on the vibrating screen (2); 3) and when the materials at the high-temperature point are moved to the conveyor (5), carrying out water spraying and cooling treatment on the corresponding high-temperature materials. The method detects the spontaneous combustion high-temperature activated carbon in the screening link of the activated carbon flue gas purification device, can position and process the spontaneous combustion high-temperature activated carbon, solves the problem that high-temperature activated carbon particles are difficult to detect and dispose comprehensively, and improves the safety of the system.)

1. A method for detecting the high temperature of activated carbon and cooling and extinguishing spontaneous combustion activated carbon comprises the following steps:

1) the thermal imaging instrument (1) shoots materials entering an imaging area (3) on the vibrating screen (2) in real time to obtain a thermal imaging image;

2) analyzing and judging whether the material entering the imaging area (3) has a high temperature point or not according to the thermal imaging image;

2a) if the thermal imaging image does not have the high temperature point, repeating the step 1);

2b) if the thermal imaging image is judged to have a high temperature point, recording the found position of the material at the high temperature point in the imaging area (3) on the vibrating screen (2);

3) and when the materials at the high-temperature point are moved to the conveyor (5), carrying out water spraying and cooling treatment on the corresponding high-temperature materials.

2. The method of claim 1, wherein: in step 3), the water spraying cooling treatment is carried out on the corresponding high-temperature materials, and the method specifically comprises the following steps: when the materials at the high-temperature point are moved to the conveyor (5) by the vibrating screen (2), preferably to the horizontal section of the conveyor (5), the corresponding high-temperature materials are sprayed with water and cooled by the spontaneous combustion activated carbon extinguishing cooling device, so that the high-temperature materials are extinguished and cooled;

preferably, in the step 3), the amount LL of water sprayed in the water spray cooling treatment_HSatisfies the following relation:

wherein: LL (LL)_HThe flow rate of the cooling water sprayed in unit time is kg/s; c_htThe specific heat capacity of the activated carbon is kJ/(kg DEG C); LL (LL)_htThe flow rate of the activated carbon to be quenched and cooled is kg/s; delta T_htThe temperature of the active carbon is reduced to the target value of DEG C; c_{H tarnish}The specific heat capacity of water at the evaporation temperature, kJ/(kg. DEG C); t is_{e tarnish}The evaporation temperature of water, DEG C; t is_e2The initial temperature of the cooling water, DEG C; c_H2The specific heat capacity of water at the initial temperature, kJ/(kg. DEG C); h is_hzIs the latent heat of vaporization of water at the evaporation temperature, kJ/kg.

3. The method of claim 2, wherein: the spontaneous combustion activated carbon extinguishing cooling device is a cooling water spraying device (6) arranged above the horizontal section of the conveyor (5); preferably, the conveyor (5) is a bucket conveyor, a plurality of chain buckets (501) are uniformly arranged in the bucket conveyor, and each chain bucket (501) is upward in opening; the cooling water spraying device (6) comprises a cooling water main pipe (601) and a cooling water branch pipe (602); the cooling water main pipe (601) and the cooling water branch pipe (602) are both arranged right above the horizontal section of the conveyor (5); one end of the cooling water main pipe (601) is provided with a cooling water inlet, and the other end of the cooling water main pipe (601) is connected with the cooling water branch pipe (602); the lower edge of the cooling water branch pipe (602) is provided with a spraying hole (603);

preferably, a cooling water valve (604) is further arranged on the cooling water main pipe (601), and the cooling water valve (604) controls the cooling water spraying device (6) to be opened and closed; preferably, the cooling water branch pipes (602) are arranged in parallel at the upper part of the chain bucket (501) and are perpendicular to the length direction of the conveyor (5); a plurality of spraying holes (603) are formed in the cooling water branch pipe (602), and the spraying holes (603) are uniformly distributed; preferably, the length of the cooling water branch pipe (602) is equal or substantially equal to the width of the chain bucket (501).

4. The method of claim 3, wherein: in step 2b), when the thermal imaging image is judged to have a high temperature point, recording the current time t 0; the step 3) specifically comprises the following steps:

3a) obtaining a distance XL1 between the found position and the tail part of the vibrating screen (2) and a distance XL2 between the tail part of the vibrating screen (2) and a cooling water branch pipe (602) of the cooling water spraying device (6), and combining a material running speed V1 on the vibrating screen (2) and a material running speed V2 on the conveyor (5) to obtain a time t1 required by the material at the high-temperature point to run from the found position to a setting position of the cooling water branch pipe (602) of the cooling water spraying device (6):

3b) starting from the time t0, after the time t1, opening a cooling water valve (604), and performing water spraying and cooling treatment on the corresponding high-temperature material by the cooling water spraying device (6);

3c) after the cooling water spraying device (6) sprays water to the high-temperature materials for a duration t2, closing a cooling water valve (604), and enabling the high-temperature materials to achieve the effect of quenching and cooling; wherein the water spray duration t2 satisfies the following relation:

wherein: k2 is a coefficient, and the value is 2-5; LJ is the link length of the conveyor, mm.

5. The method according to any one of claims 1-4, wherein: a cover plate (201) is arranged on the vibrating screen (2), and materials entering the vibrating screen (2) move along the length direction of the vibrating screen (2); the imaging zone (3) comprises a first imaging zone (301) and a second imaging zone (302); -on the vibrating screen (2), a first imaging zone (301) is located upstream of a second imaging zone (302);

in step 1), the thermal imaging instrument (1) shoots the material entering the imaging area (3) on the vibrating screen (2) in real time to obtain a thermal imaging image, which specifically comprises the following steps:

1a) arranging a thermal imaging camera (1) above a cover plate (201) of a vibrating screen (2), wherein an observation device (4) is arranged on the upper part of the cover plate (201) of the vibrating screen (2), and the observation device (4) is positioned between the cover plate (201) of the vibrating screen (2) and the thermal imaging camera (1);

1b) the thermal imaging system (1) surrounds the observation device (4) to do reciprocating motion in a vertical plane, and the thermal imaging system (1) shoots materials entering a first imaging area (301) and/or a second imaging area (302) on the vibrating screen (2) in real time through the observation device (4) to obtain a primary thermal imaging image and/or a secondary thermal imaging image.

6. The method of claim 5, wherein: in the step 2), whether the material entering the imaging area (3) has a high temperature point is judged according to the thermal imaging image analysis, and the method specifically comprises the following steps:

the thermal imaging instrument (1) shoots materials entering a first imaging area (301) on the vibrating screen (2) in real time to obtain a primary thermal imaging image; acquiring a highest temperature value T1 in the primary thermal imaging image according to the primary thermal imaging image, and comparing the highest temperature value T1 with a set target temperature T0; if T1 is not more than T0, judging that the primary thermal imaging image does not have a high temperature point, and repeating the step 1); if T1 is greater than T0, the primary thermal imaging image is judged to have a suspected high temperature point; preferably, the value range of T0 is 390-425 ℃, and preferably 400-420 ℃;

when the primary thermal imaging image is judged to have a suspected high-temperature point, the thermal imaging instrument (1) tracks and shoots a secondary thermal imaging image of the material at the suspected high-temperature point entering a second imaging area (302) on the vibrating screen (2), and further judges whether the suspected high-temperature point is the high-temperature point;

dividing the secondary thermal imaging image into n areas, obtaining the highest temperature of each of the n areas, selecting the highest temperature value T2 of the n highest temperatures, and comparing the highest temperature value T2 with a set target temperature T0; if T2 is not more than T0, judging the suspected high temperature point as a false high temperature point, and repeating the step 1); if T2 is greater than T0, confirming that the suspected high temperature point is a high temperature point; the highest temperature value T2 corresponds to the area on the secondary thermal imaging image, so that the found position of the material at the high temperature point in the second imaging area (302) on the vibrating screen (2) is determined and recorded.

7. The method according to claim 5 or 6, characterized in that: the observation device (4) is a thermal imager observation cover; the thermal imaging camera observation cover comprises a side wall cover body (401), a top observation hole (402) and a bottom observation hole (403); the area enclosed by the top end edge of the side wall cover body (401) is the top observation hole (402); the area enclosed by the bottom end edge of the side wall cover body (401) is the bottom observation hole (403);

the thermal imaging system (1) shoots materials entering a first imaging area (301) and/or a second imaging area (302) on the vibrating screen (2) in real time through a top observation hole (402) and a bottom observation hole (403), and then obtains a primary thermal imaging image and/or a secondary thermal imaging image.

8. The high temperature detection method according to claim 7, characterized in that: the thermal imaging camera observation cover further comprises a front cover plate (404) and a rear cover plate (405); wherein, the front cover plate (404) is arranged at the bottom of the side wall cover body (401) and is positioned at the upstream side of the bottom observation hole (403); the rear cover plate (405) is arranged at the bottom of the side wall cover body (401) and is positioned at the downstream side of the bottom observation hole (403);

preferably, according to the position change of the thermal imaging camera (1) making reciprocating motion around the observation device (4) in a vertical plane, the front cover plate (404) and the rear cover plate (405) synchronously move along the length direction of the vibrating screen (2) in the plane of the bottom observation hole (403); preferably, the center of the aperture formed between the front cover plate (404) and the rear cover plate (405), the center of the top observation hole (402), and the thermal imaging camera (1) are on the same straight line.

9. The method according to claim 7 or 8, characterized in that: a cover plate (201) of the vibrating screen (2) is provided with an opening; the width of the opening is equal or basically equal to the width of the vibrating screen (2); the thermal imaging camera observation cover is positioned on the upper part of an opening on a cover plate (201) of the vibrating screen (2); preferably, the bottom observation hole (403) of the observation cover of the thermal imaging camera is equal in size and overlapped with the opening hole in the cover plate (201) of the vibrating screen (2); and/or

The thermal imager (1) is connected with a data processing module (A1), the data processing module (A1) is connected with a main process computer control system (A2), and meanwhile, a cooling water valve (604) of the cooling water spraying device (6) is connected with the main process computer control system (A2); when the materials entering the imaging area (3) are analyzed and judged to have high temperature points according to the thermal imaging image, the data processing module (A1) gives an alarm to the main process computer control system (A2), and the main process computer control system (A2) realizes the water spraying and temperature reduction treatment on the corresponding high-temperature materials by controlling the operation of the cooling water valve (604).

10. A system for high temperature detection of activated carbon and cooling and extinguishing of spontaneous combustion activated carbon or a system for high temperature detection of activated carbon and cooling and extinguishing of spontaneous combustion activated carbon for use in the method of any one of claims 1 to 9, the system comprising a thermal imager (1), a vibrating screen (2), a conveyor (5), and a cooling device for extinguishing of spontaneous combustion activated carbon; the discharge opening of the vibrating screen (2) is connected with the feed opening of the conveyor (5); a cover plate (201) is arranged on the vibrating screen (2); the thermal imaging system (1) is arranged above a cover plate (201) of the vibrating screen (2); the conveyor comprises a horizontal section and a vertical section, and the spontaneous combustion activated carbon extinguishing and cooling device is arranged above the horizontal section of the conveyor (5); and an imaging area (3) is arranged on the vibrating screen (2).

11. The system of claim 10, wherein: the spontaneous combustion activated carbon extinguishing cooling device is a cooling water spraying device (6) arranged above the horizontal section of the conveyor (5); preferably, the conveyor (5) is a bucket conveyor, a plurality of chain buckets (501) are uniformly arranged in the bucket conveyor, and each chain bucket (501) is upward in opening; the cooling water spraying device (6) comprises a cooling water main pipe (601) and a cooling water branch pipe (602); the cooling water main pipe (601) and the cooling water branch pipe (602) are both arranged right above the horizontal section of the conveyor (5); one end of the cooling water main pipe (601) is provided with a cooling water inlet, and the other end of the cooling water main pipe (601) is connected with the cooling water branch pipe (602); the lower edge of the cooling water branch pipe (602) is provided with a spraying hole (603);

12. The system according to claim 10 or 11, characterized in that: the system further comprises a viewing device (4); the observation device (4) is arranged on the upper part of the cover plate (201) of the vibrating screen (2) and is positioned between the cover plate (201) of the vibrating screen (2) and the thermal imaging camera (1); preferably, the observation device (4) is a thermal imaging camera observation cover; the thermal imaging camera observation cover comprises a side wall cover body (401), a top observation hole (402) and a bottom observation hole (403); the area enclosed by the top end edge of the side wall cover body (401) is the top observation hole (402); the area enclosed by the bottom end edge of the side wall cover body (401) is the bottom observation hole (403);

preferably, the imaging zone (3) on the shaker (2) comprises a first imaging zone (301) and a second imaging zone (302), the first imaging zone (301) being located upstream of the second imaging zone (302); the thermal imaging system (1) moves back and forth in a vertical plane around the observation device (4), and the thermal imaging system (1) shoots materials entering a first imaging area (301) and/or a second imaging area (302) on the vibrating screen (2) in real time through the observation device (4) to obtain a primary thermal imaging image and/or a secondary thermal imaging image.

13. The system of claim 12, wherein: the thermal imaging camera observation cover further comprises a front cover plate (404) and a rear cover plate (405); wherein, the front cover plate (404) is arranged at the bottom of the side wall cover body (401) and is positioned at the upstream side of the bottom observation hole (403); the rear cover plate (405) is arranged at the bottom of the side wall cover body (401) and is positioned at the downstream side of the bottom observation hole (403);

14. The system according to claim 12 or 13, characterized in that: a cover plate (201) of the vibrating screen (2) is provided with an opening; the width of the opening is equal or basically equal to the width of the vibrating screen (2); the thermal imaging camera observation cover is positioned on the upper part of an opening on a cover plate (201) of the vibrating screen (2); preferably, the bottom observation hole (403) of the observation cover of the thermal imaging camera is equal in size and overlapped with the opening hole in the cover plate (201) of the vibrating screen (2); and/or

The system also includes a data processing module (A1) and a main process computer control system (A2); the thermal imager (1) is connected with a data processing module (A1), the data processing module (A1) is connected with a main process computer control system (A2), and meanwhile, a cooling water valve (604) of the cooling water spraying device (6) is connected with the main process computer control system (A2); the main process computer control system (A2) controls the operation of the data processing module (A1), the thermal imager (1) and the cooling water valve (604).

Technical Field

The invention relates to detection and treatment of high-temperature activated carbon particles in an activated carbon flue gas purification device, in particular to a method and a system for high-temperature detection of activated carbon and cooling and extinguishing of spontaneous combustion activated carbon, and belongs to the technical field of activated carbon flue gas purification.

Background

The amount of flue gas generated in the sintering process accounts for about 70 percent of the total flow of steelOn the left and right, the main pollutant components in the sintering flue gas are dust and SO₂、NO_X(ii) a In addition, a small amount of VOCs, dioxin, heavy metals and the like are also added; the waste water can be discharged after purification treatment. At present, the technology of treating sintering flue gas by using an activated carbon desulfurization and denitrification device is mature, and the activated carbon desulfurization and denitrification device is popularized and used in China, so that a good effect is achieved.

The working schematic diagram of the activated carbon desulfurization and denitrification device in the prior art is shown in figure 1: raw flue gas (main component of pollutant is SO) generated in sintering process₂) The flue gas is discharged as clean flue gas after passing through an active carbon bed layer of the adsorption tower; adsorbing pollutants (the main component of the pollutants is SO) in the flue gas₂) The activated carbon is sent into an analysis tower through an activated carbon conveyor S1, the activated carbon adsorbed with pollutants in the analysis tower is heated to 400-430 ℃ for analysis and activation, SRG (sulfur-rich) gas released after the analysis and activation is subjected to an acid making process, the activated carbon after the analysis and activation is cooled to 110-130 ℃ and then discharged out of the analysis tower, activated carbon dust is screened out by a vibrating screen, and the activated carbon particles on the screen reenter the adsorption tower through an activated carbon conveyor S2; fresh activated carbon is supplied to the conveyor S1 (activated carbon used in the flue gas purification apparatus is cylindrical activated carbon granules having typical sizes: 9mm in diameter and 11mm in height).

As shown in figure 1, the activated carbon is heated to 400-430 ℃ in the desorption tower, and the burning point temperature of the activated carbon used by the activated carbon flue gas purification device is 420 ℃; the desorption column was of a gas-tight construction and was filled with nitrogen.

The schematic structure of the prior art desorption tower is shown in fig. 2: the active carbon is not contacted with air in the desorption tower so as to ensure that the active carbon is not burnt in the desorption tower; in the process of heating and cooling the activated carbon in the desorption tower, occasionally, a small amount of heated activated carbon particles are not sufficiently cooled in the cooling section, and a small amount of high-temperature activated carbon particles which are not cooled to a safe temperature are discharged from the desorption tower (the amount of activated carbon particles filled in the desorption tower of the sintering flue gas purification device exceeds hundreds of tons, and the processes of flowing, cooling, heating, heat conduction and the like of the activated carbon particles in the desorption tower are complicated). The high-temperature activated carbon particles are discharged from the desorption tower and then contact with air, spontaneous combustion (smoldering and flameless) can occur, a small amount of high-temperature activated carbon particles of the spontaneous combustion can possibly ignite low-temperature activated carbon particles around the high-temperature activated carbon particles, the high-temperature activated carbon particles of the spontaneous combustion can enter each link of the flue gas purification device along with the circulation of the activated carbon, the safe and stable operation of the sintering activated carbon flue gas purification system is threatened, and the sintering activated carbon flue gas purification device has the requirement of detecting and disposing the high-temperature spontaneous combustion activated carbon particles. As shown in fig. 1, the sintered activated carbon flue gas purification device circulates between the desorption tower and the adsorption tower, and all links such as the desorption tower, the adsorption tower, the conveyor, the vibrating screen, the buffer bin and the like are all of airtight structures.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a method and a system for detecting the high temperature of activated carbon and cooling and extinguishing spontaneous combustion activated carbon. According to the invention, the thermal imager is arranged above the vibrating screen cover plate of the activated carbon flue gas purification device, the thermal imager shoots materials entering an imaging area to obtain thermal imaging images, and then analyzes and judges whether the materials have high temperature points, records the found positions of the materials at the high temperature points in the imaging area, and carries out water spraying and cooling treatment on the materials when the high temperature materials move to the conveyor. According to the technical scheme provided by the invention, the spontaneous combustion high-temperature activated carbon is detected in the vibration screening link of the activated carbon flue gas purification device, and can be positioned and processed, so that the problem that the high-temperature activated carbon particles are difficult to detect and treat comprehensively is solved, and the safety of the system is improved.

According to a first embodiment of the invention, a method for detecting the high temperature of the activated carbon and quenching the spontaneous combustion activated carbon by cooling is provided.

A method for detecting the high temperature of activated carbon and cooling and extinguishing spontaneous combustion activated carbon comprises the following steps:

1) the thermal imaging instrument shoots the material entering the imaging area on the vibrating screen in real time to obtain a thermal imaging image;

2) analyzing and judging whether the material entering the imaging area has a high temperature point or not according to the thermal imaging image;

2a) if the thermal imaging image does not have the high temperature point, repeating the step 1);

2b) if the thermal imaging image is judged to have a high temperature point, recording the found position of the material at the high temperature point in the imaging area on the vibrating screen;

3) and when the materials at the high-temperature point are moved to the conveyor, carrying out water spraying cooling treatment on the corresponding high-temperature materials.

In the invention, in step 3), the water spraying cooling treatment is performed on the corresponding high-temperature material, and specifically comprises the following steps: when the materials at the high-temperature point are moved to the conveyor by the vibrating screen, preferably to the horizontal section of the conveyor, the corresponding high-temperature materials are sprayed with water and cooled by the spontaneous combustion activated carbon extinguishing cooling device, so that the high-temperature materials are extinguished and cooled. The horizontal section position of the conveyor refers to the horizontal section of the conveyor close to the vibrating screen, and does not refer to the horizontal section of the conveyor where a conventional discharging point is located.

Preferably, in the step 3), the amount LL of water sprayed in the water spray cooling treatment_HSatisfies the following relation:

wherein: LL (LL)_HThe flow rate of the cooling water sprayed in unit time is kg/s. C_htThe specific heat capacity of the activated carbon is kJ/(kg-DEG C). LL (LL)_htThe flow rate of the activated carbon to be quenched and cooled is kg/s. Delta T_htIs the target of active carbon temperature reduction. C_H1The specific heat capacity of water at the evaporation temperature, kJ/(kg. DEG C.). T is_e1The evaporation temperature of water, DEG C. T is_e2The initial temperature of the cooling water is DEG C. C_H2The specific heat capacity of water at the initial temperature, kJ/(kg. DEG C.). h is_hzIs the latent heat of vaporization of water at the evaporation temperature, kJ/kg.

In the invention, the spontaneous combustion activated carbon extinguishing cooling device is a cooling water spraying device arranged above the horizontal section of the conveyor. Preferably, the conveyor is a bucket chain conveyor, a plurality of buckets are uniformly arranged in the bucket chain conveyor, and each bucket chain is opened upwards. The cooling water spraying device comprises a cooling water main pipe and a cooling water branch pipe. The cooling water main pipe and the cooling water branch pipe are both arranged right above the horizontal section of the conveyor. One end of the cooling water main pipe is provided with a cooling water inlet, and the other end of the cooling water main pipe is connected with a cooling water branch pipe. The lower edge of the cooling water branch pipe is provided with a spraying hole. Namely, the lower part of the cooling water branch pipe is provided with a spraying hole, and the cooling water is sprayed downwards from the spraying hole.

Preferably, the cooling water main pipe is further provided with a cooling water valve, and the cooling water valve controls the cooling water spraying device to be opened and closed. Preferably, the cooling water branch pipes are arranged in parallel at the upper part of the chain bucket and are perpendicular to the length direction of the conveyor. A plurality of spraying holes are formed in the cooling water branch pipe and are uniformly distributed. Preferably, the length of the cooling water branch pipe is equal or substantially equal to the width of the chain bucket.

In the present invention, in step 2b), when it is judged that the thermal imaging image has a high temperature point, the time at which the position of the material at the high temperature point is found in the imaging area on the vibrating screen is recorded is set to t 0.

The step 3) specifically comprises the following steps:

3a) acquiring a distance XL1 between the found position and the tail of the vibrating screen and a distance XL2 between the tail of the vibrating screen and a cooling water branch pipe of the cooling water spraying device, and combining a material running speed V1 on the vibrating screen and a material running speed V2 on the conveyor to obtain the time t1 required by the material at the high temperature point to run from the found position to the setting position of the cooling water branch pipe of the cooling water spraying device:

3b) starting from the time t0, after the time t1, opening a cooling water valve, and performing water spraying and temperature reduction treatment on the corresponding high-temperature material by using the cooling water spraying device;

3c) after the cooling water spraying device sprays water to the high-temperature material for a duration t2, closing a cooling water valve, and enabling the high-temperature material to achieve an effect of quenching and cooling; wherein the water spray duration t2 satisfies the following relation:

wherein: k2 is a coefficient, and the value is 2-5; LJ is the link length of the conveyor, mm.

In the invention, the vibrating screen is provided with the cover plate, and the material entering the vibrating screen moves along the length direction of the vibrating screen. The imaging region includes a first imaging region and a second imaging region. On the shaker, the first imaging zone is upstream of the second imaging zone.

In step 1), the thermal imaging instrument shoots the material entering the imaging area on the vibrating screen in real time to obtain a thermal imaging image, and specifically comprises:

1a) arranging a thermal imager above a vibrating screen cover plate, wherein an observation device is arranged at the upper part of the vibrating screen cover plate and is positioned between the vibrating screen cover plate and the thermal imager;

1b) the thermal imaging instrument makes reciprocating motion around the observation device in a vertical plane, and shoots materials entering a first imaging area and/or a second imaging area on the vibrating screen in real time through the observation device to obtain a primary thermal imaging image and/or a secondary thermal imaging image.

In the invention, in step 2), whether the material entering the imaging area has a high temperature point is judged according to the thermal imaging image analysis, specifically:

the thermal imaging instrument shoots the material entering the first imaging area on the vibrating screen in real time to obtain a primary thermal imaging image. And acquiring the highest temperature value T1 in the primary thermal imaging image according to the primary thermal imaging image, and comparing the highest temperature value T1 with the set target temperature T0. And if T1 is not more than T0, judging that the primary thermal imaging image does not have a high temperature point, and repeating the step 1). And if T1 is greater than T0, judging that the primary thermal imaging image has a suspected high-temperature point. Preferably, the value range of T0 is 390-425 ℃, and preferably 400-420 ℃.

When the primary thermal imaging image is judged to have the suspected high-temperature point, the thermal imager tracks and shoots a secondary thermal imaging image in which the material at the suspected high-temperature point enters a second imaging area on the vibrating screen, and whether the suspected high-temperature point is the high-temperature point is further judged.

Dividing the secondary thermal imaging image into n areas, obtaining the highest temperature of each of the n areas, selecting the highest temperature value T2 of the n highest temperatures, and comparing the highest temperature value T2 with a set target temperature T0. If T2 is not more than T0, the suspected high temperature point is judged to be a false high temperature point, and the step 1) is repeated. And if T2 is greater than T0, confirming that the suspected high temperature point is the high temperature point. The highest temperature value T2 corresponds to the area on the secondary thermal imaging image, so that the found position of the material on the vibrating screen in the second imaging area at the high temperature point is determined and recorded.

In the invention, the observation device is a thermal imaging camera observation cover. The thermal imager observation cover comprises a side wall cover body, a top observation hole and a bottom observation hole. The top observation hole is defined by the top edge of the side wall cover body. The area enclosed by the bottom edge of the side wall cover body is the bottom observation hole.

The thermal imaging instrument shoots materials entering the first imaging area and/or the second imaging area on the vibrating screen in real time through the top observation hole and the bottom observation hole, and then obtains a primary thermal imaging image and/or a secondary thermal imaging image.

Preferably, the thermal imaging camera observation cover further includes a front cover plate and a rear cover plate. The front cover plate is arranged at the bottom of the side wall cover body and is positioned on the upstream side of the bottom observation hole. The back shroud sets up the bottom of the lateral wall cover body, and is located the downstream side of bottom observation hole.

Preferably, the front cover plate and the rear cover plate move synchronously along the length direction of the vibrating screen in the plane of the bottom observation hole according to the position change of the thermal imaging camera making reciprocating motion around the observation device in the vertical plane. Preferably, the center of the aperture formed between the front cover plate and the rear cover plate, the center of the top observation hole and the thermal imaging camera are in the same straight line.

Preferably, the cover plate of the vibrating screen is provided with an opening. The width of the openings is equal or substantially equal to the width of the shaker. The thermal imager observation cover is positioned on the upper part of the opening on the vibrating screen cover plate. Preferably, the bottom observation hole of the thermal imaging camera observation cover is equal in size and coincides with the opening hole in the vibrating screen cover plate in position.

In the invention, the thermal imager is connected with the data processing module, the data processing module is connected with the main process computer control system, and meanwhile, the cooling water valve of the cooling water spraying device is connected with the main process computer control system. When the materials entering the imaging area are analyzed and judged to have high temperature points according to the thermal imaging image, the data processing module gives an alarm to the main process computer control system, and the main process computer control system realizes the water spraying and cooling treatment on the corresponding high-temperature materials by controlling the operation of the cooling water valve.

According to a second embodiment of the invention, a system for detecting the high temperature of the activated carbon and quenching the spontaneous combustion activated carbon by cooling is provided.

A system for detecting the high temperature of the activated carbon and cooling and extinguishing the spontaneous combustion activated carbon or a system for detecting the high temperature of the activated carbon and cooling and extinguishing the spontaneous combustion activated carbon, which is used for the method of the first embodiment, comprises a thermal imager, a vibrating screen, a conveyor and a spontaneous combustion activated carbon extinguishing and cooling device. And the discharge opening of the vibrating screen is connected with the feed opening of the conveyor. The vibrating screen is provided with a cover plate. The thermal imaging camera is arranged above the vibrating screen cover plate. The conveyer includes horizontal segment and vertical section, spontaneous combustion active carbon extinguishes cooling device and sets up the top at the conveyer horizontal segment. An imaging area is arranged on the vibrating screen.

Generally, the activated carbon outlet at the end of the vibrating screen includes an oversize activated carbon outlet and an undersize activated carbon outlet. The active carbon particles with the particle size larger than the sieve pore size of the sieve plate of the vibrating sieve flow out of the active carbon outlet on the sieve and enter the conveyer. The active carbon particles with the particle size smaller than the sieve pore size of the sieve plate enter the loss active carbon collecting system through the active carbon outlet under the sieve and do not enter the active carbon smoke purifying device any more. That is, the discharge opening of the vibrating screen in the present invention refers to the outlet of the activated carbon on the screen of the vibrating screen.

In the present invention, the system further comprises a viewing device. The observation device is arranged on the upper part of the vibrating screen cover plate and is positioned between the vibrating screen cover plate and the thermal imager. Preferably, the observation device is a thermal imaging camera observation cover. The thermal imager observation cover comprises a side wall cover body, a top observation hole and a bottom observation hole. The top observation hole is defined by the top edge of the side wall cover body. The area enclosed by the bottom edge of the side wall cover body is the bottom observation hole.

Preferably, the imaging zone on the shaker includes a first imaging zone and a second imaging zone, the first imaging zone being upstream of the second imaging zone. The thermal imaging instrument makes reciprocating motion around the observation device in a vertical plane, and shoots materials entering a first imaging area and/or a second imaging area on the vibrating screen in real time through the observation device to obtain a primary thermal imaging image and/or a secondary thermal imaging image.

Here, the length of the aperture formed between the front cover plate and the rear cover plate is set to L2, and L2 satisfies the following relation:

l2> k1 (V1/X) + f … … … … (formula 4).

Wherein: k1 is a coefficient, and the value is 2-3. V1 is the running speed of the material on the vibrating screen, mm/s. And X is the unit time frame number of the thermal imager, frame/s. f is the left and right vibration amplitude of the vibrating screen, mm.

In the invention, the system also comprises a data processing module and a main process computer control system. The thermal imager is connected with the data processing module, the data processing module is connected with the main process computer control system, and meanwhile, the cooling water valve of the cooling water spraying device is connected with the main process computer control system. The main process computer control system controls the operation of the data processing module, the thermal imager and the cooling water valve.

As shown in fig. 1, the activated carbon flue gas purification device circulates between the desorption tower and the adsorption tower, all links such as the desorption tower, the adsorption tower, the conveyor and the buffer bin are all airtight structures, and activated carbon is in a large amount of gathering states in the above devices, and occasionally appearing high-temperature activated carbon may be surrounded by a group of normal-temperature activated carbon, so that high-temperature activated carbon particles are difficult to detect comprehensively.

In the activated carbon flue gas purification device, activated carbon circulates between an analysis tower and an adsorption tower, and all the activated carbon needs to be screened out by a vibrating screen in the circulation. The active carbon powder screening is a subsequent process of a desorption tower (a high-temperature heating link), and active carbon particles are in a rolling and flat-spreading state on a vibrating screen. Therefore, the high-temperature activated carbon particles (or the spontaneous combustion activated carbon) are detected in the activated carbon screening link, and the high-temperature activated carbon particles in the activated carbon flue gas purification process can be found more conveniently.

In the application, a method for detecting the high temperature of the activated carbon and cooling and extinguishing the spontaneous combustion activated carbon is provided. The method comprises the steps of firstly, shooting materials in an imaging area on a vibrating screen in real time to obtain a thermal imaging image; and analyzing and judging whether the material entering the imaging area has a high temperature point or not according to the thermal imaging image. And if the thermal imaging image does not have the high temperature point, the thermal imager continuously monitors the material entering the imaging area on the vibrating screen. When the thermal imaging image is judged to have a high temperature point, recording the found position of the material at the high temperature point in the imaging area; when the corresponding high-temperature materials are moved to the conveyor (preferably to the horizontal section of the conveyor), the spontaneous combustion activated carbon extinguishing cooling device sprays water to cool the high-temperature materials, so that the high-temperature materials are extinguished and cooled.

After the thermal imaging system detects the spontaneous combustion activated carbon particles, namely high temperature points, the relatively safe disposal mode mainly comprises: 1. discharging the spontaneous combustion activated carbon; the exhausted spontaneous combustion activated carbon often increases the loss of an activated carbon flue gas purification system, and exhausted spontaneous combustion activated carbon particles need further treatment; 2. extinguishing and cooling the activated carbon; after the spontaneous combustion activated carbon particles are extinguished, if the high-temperature state above the spontaneous combustion point is continuously maintained, spontaneous combustion can occur in the air, so that the spontaneous combustion activated carbon particles need to be safely disposed, and then the spontaneous combustion activated carbon needs to be extinguished and cooled.

In the invention, the spontaneous combustion activated carbon extinguishing cooling device is a cooling water spraying device. The invention adopts water as a medium to extinguish the spontaneous combustion activated carbon and cool the high-temperature activated carbon. Generally speaking, the burning carbon can generate water gas reaction when meeting water, but in the application scene of the invention, the spontaneous combustion activated carbon particles are local high temperature points in the activated carbon particles, the volume and the range of the burning activated carbon particles are very small, the burning activated carbon particles can be quickly extinguished and cooled after meeting water, and the condition of continuous water gas reaction is not formed; meanwhile, the present invention employs water as a quenching cooling medium in view of low cost and easy availability of water.

In the present invention, the cooling water spray device is provided directly above the conveyor. Generally, the distance from the lower end surface of the cooling water spraying device to the chain bucket opening along the plane of the conveyor is smaller than the height of the chain bucket. The cooling water spraying device comprises a cooling water main pipe and a cooling water branch pipe, wherein one end of the cooling water main pipe is provided with a cooling water inlet, and the other end of the cooling water main pipe is connected with the cooling water branch pipe. The cooling water branch pipes are arranged on the upper part of the chain bucket in parallel, and the cooling water branch pipes are arranged perpendicular to the length direction of the conveyor. The cooling water branch pipe is along setting up a plurality of spraying holes, a plurality of spraying hole evenly distributed down, and the during operation cooling water sprays below through spraying the hole. The projection of the cooling water spraying device does not exceed the range of the chain bucket, namely, the cooling water spraying device does not spray to the area outside the chain bucket below when in work. The cooling water branch pipe can be provided with single-row or multi-row spraying holes, and when the cooling water spraying device works, the flow of cooling water sprayed by each spraying hole is basically consistent. In the present invention, according to the heat balance of the activated carbon and the cooling water, it is possible to obtain:

C_ht*M_ht*ΔT_ht＝[C_H1*T_e1-C_H2*T_e2+h_hz]*M_H；

namely, the method comprises the following steps: c_ht*LL_ht*t＊ΔT_ht＝[C_H1*T_e1-C_H2*T_e2+h_hz]*LL_H*t；

Thereby obtaining the water spraying amount LL of the cooling water spraying device_HSatisfies the following relation:

in general, the average temperature of the cooled activated carbon particles discharged from the desorption tower is about 120 to 140 ℃, the temperature of the activated carbon is lowered to a predetermined target temperature T0 or less, and the amount of cooling water is, for example, in consideration of lowering the temperature of the activated carbon by 15 to 20 ℃ (i.e., Δ T)_ht15-20 ℃), and further ensuring that the cooling water is completely converted into vapor in the cooling process, namely liquid water is not carried into a chain bucket, and the temperature of the cooling water is raised to the water evaporation temperature under the local atmospheric pressure in the heat exchange process, such as 100 ℃. The water evaporation temperature as used herein refers to the temperature of water at which it rapidly evaporates in large quantities. That is, the invention prevents the liquid water from entering the conveyor and even the whole flue gas purification device by accurately controlling the water spraying amount of the cooling water spraying device, thereby preventing the activated carbon powder from being adhered to the conveying equipment caused by the liquid water in the conveying system, and simultaneously preventing the incompletely resolved SO in the liquid water and the activated carbon₂Reaction to form H₂SO₄And corrodes the transport equipment. The invention adopts water which is low in cost and easy to obtain as a medium for extinguishing and cooling the activated carbon, reduces the use cost and avoids the technical problem which possibly occurs when the water is used as the extinguishing and cooling medium.

In addition, in the above formula 1, LL_htThe flow rate of the activated carbon to be quenched and cooled is kg/s. As can be seen from fig. 9, the activated carbon particles in the chain bucket passing through the cooling water spraying device on the conveyor come from the discharging device (such as a roller feeder) of the desorption tower, the flow rate of the activated carbon to be quenched and cooled at present is the same as the flow rate of the discharging device of the desorption tower at a certain moment in the past, and the time difference is:

t-t 1+ k … … … … (formula 5);

wherein: t1 is the time length of waiting for the valve to open after the thermal imager detects the high-temperature activated carbon particles (or the spontaneous combustion activated carbon particles), which is unit s; k is a constant and represents the time length of the activated carbon particles from the discharging device of the desorption tower to the discovery position of the high-temperature activated carbon particles, and the time length is s.

The time at which the position of the high temperature activated carbon particles found in the image zone on the vibrating screen was recorded was set to t 0. Therefore, the time t0 is pushed forward for k time, and the flow of the activated carbon to be quenched and cooled can be obtained by measuring the blanking flow of the activated carbon of the discharge device of the current analytical tower. After the water spraying amount of the cooling water spraying device is calculated according to the formula 1, the time when the cooling water spraying device starts to work (namely the time when the cooling water valve is opened) is calculated according to the formula 2, and the time when the cooling water spraying device stops working (namely the time when the cooling water valve is closed) is calculated according to the formula 3. Wherein, formula 2 and formula 3 are as follows:

namely, from the time t0, after the time t1 elapses, the cooling water valve is opened, and the cooling water spraying device starts spraying water to the high-temperature material. And after the cooling water spraying device continuously sprays water for the high-temperature material for t2, closing the cooling water valve, and enabling the high-temperature material to achieve the effect of extinguishing and cooling. Namely, the water spraying duration determined according to the formula 3 can ensure that the high-temperature activated carbon particles are sprayed to be cooled by cooling water.

In addition, as shown in fig. 10, the conveyor is driven by a motor M, and when the motor M works, the rotating speed of the motor M is adjusted by a frequency converter VF (other speed adjusting modes are available, and the speed adjusting effect similar to that of the frequency converter can be achieved). The frequency converter VF is monitored by the master. The relationship among the running speed V2 of the material on the conveyor, the rotating speed RV of the motor M and the frequency f1 of the frequency converter VF is as follows:

v2 ═ k3 ═ k3 ═ k4 ═ f1 … … … … (formula 6);

wherein: k3 is a constant and is related to the transformation ratio of the speed reducer and the radius of the star wheel; k4 is a constant, and is related to the number of poles of the motor and the slip of the motor. By substituting equation 6 into equations 2 and 3, the delay times t1 and t2 can be determined according to the given frequency f1 of the conveyor in production.

Preferably, the specific high-temperature detection process in the method of the present invention is as follows: firstly, shooting a material entering a first imaging area on a vibrating screen to obtain a primary thermal imaging image; analyzing and judging whether the material entering the first imaging area has a suspected high-temperature point or not according to the primary thermal imaging image; tracking and shooting the material with the suspected high-temperature point in the primary thermal imaging image, and acquiring a secondary thermal imaging image of the material at the suspected high-temperature point entering the second imaging area; and analyzing and judging whether the suspected high-temperature point is a high-temperature point or not according to the secondary thermal imaging image. And when the suspected high-temperature point is confirmed to be the high-temperature point, recording the found position of the high-temperature point material in the second imaging area and giving an alarm.

In the invention, the thermal imaging image (i.e. the primary thermal imaging image or the secondary thermal imaging image) is an infrared image with temperature information, and the temperature information of the material at each point in the imaging area can be read from the thermal imaging image. Comparing the highest temperature value T1 in the primary thermographic image with the target temperature T0, it can be determined whether there is a high temperature point in the primary thermographic image. And if the T1 is not more than T0, judging that the primary thermal imaging image does not have a high-temperature point, and continuously carrying out high-temperature monitoring on the material subsequently entering the first imaging area by the thermal imaging instrument. If T1 is greater than T0, the primary thermal imaging image is judged to have a suspected high temperature point; the thermal imager further shoots the material at the suspected high-temperature point to obtain a secondary thermal imaging image of the material in the second imaging area. Dividing the secondary thermal imaging image into n regions (for example, into nine-square grids), acquiring a highest temperature value T2 in the n regions, and comparing the T2 with a target temperature T0 to determine whether the suspected high temperature point is a high temperature point. If T2 is not more than T0, the suspected high temperature point is judged to be a false high temperature point, and the thermal imager continues to monitor the high temperature of the material entering the first imaging area subsequently. If T2 is greater than T0, the suspected high temperature point is confirmed to be a high temperature point, the highest temperature value T2 corresponds to the area on the secondary thermal imaging image, and therefore the found position of the material at the high temperature point in the second imaging area is determined and an alarm is given to a main control (namely a main process computer control system). In order to further embody the accuracy or precision of the high-temperature detection, the secondary thermal imaging image can be a plurality of continuously shot pictures, and the temperature information of the material at the suspected high-temperature point in the plurality of continuously shot pictures is compared, so that more accurate judgment is made on whether the suspected high-temperature point is the high-temperature point.

In the transportation process of high-temperature materials, when the temperature of the materials reaches a certain value, oxidation exothermic reaction can occur in the materials, so that the temperature of the materials is further increased; but the vibration or the relative change of the internal position exists between the materials in the transportation process, so that the condition of the oxidation exothermic reaction of the materials can be destroyed, and the temperature of the materials is reduced. If the situation that the material is high in temperature or spontaneously combusted is directly judged through a primary thermal imaging image after a primary high-temperature point is detected, the found position of the material at the high-temperature point is marked and subjected to alarm processing, and the situation that processing is improper due to inaccurate detection is inevitable. According to the technical scheme, the process of identifying the high-temperature point materials is divided into preliminary judgment of suspected high-temperature points, tracking judgment is carried out on the suspected high-temperature points, and therefore accurate judgment data of the high-temperature points are obtained. The accurate judgment of the high temperature point of the material is also beneficial to the subsequent further processing of the material aiming at the high temperature point.

It should be noted that, in the transportation process of the material by the vibrating screen or the conveyer, local relative displacement occurs between material particles on the conveyer due to the vibration of the conveyer, so that the material which may be self-burning releases heat, and the initial suspected high temperature point is determined as the false high temperature point.

Generally speaking, the main body of the vibrating screen is a sealing structure, active carbon moves in the vibrating screen, and conventional detection modes such as a thermocouple arranged in the existing vibrating screen are difficult to capture high-temperature active carbon particles passing through rapidly. The thermal imaging camera is arranged in the vibrating screen, so that the problems of insufficient space and severe working environment (vibration and dust) exist. Therefore, the existing vibrating screen needs to be modified to meet the requirement of a thermal imaging camera on detecting high-temperature activated carbon particles.

In this application, the thermal imaging system sets up in the top of shale shaker apron (thermal imaging system is independent of the shale shaker setting promptly), is equipped with the trompil on the apron of shale shaker, and the thermal imaging system passes through the active carbon that the trompil flowed through on to the shale shaker sieve carries out real-time supervision. Through the arrangement, although the vibrating screen is simple and convenient, the cover plate of the vibrating screen needs to be provided with the opening with larger size. The large size of the opening causes the following problems: 1. because the thermal imager needs to be ensured to image, dust removal cannot be arranged right above the opening, and working dust of the vibrating screen overflows to seriously affect the surrounding environment; 2. the active carbon particles jump out of the vibrating screen in the screening process, so that the loss of the active carbon is increased; 3. foreign matters easily enter the flue gas purification device from the holes of the vibrating screen, and the safe and stable operation of the activated carbon flue gas purification device is influenced.

To above-mentioned problem, this application scheme is further optimized, reduces above-mentioned trompil size, sets up elongated trompil on the shale shaker apron, the width of trompil is with the width of shale shaker to guarantee that thermal imaging system can detect the whole active carbon that flows through on the shale shaker sieve. Meanwhile, an observation device (such as a thermal imaging camera observation cover) is arranged on the upper part of the opening of the vibrating screen cover plate. The observation device comprises a side wall cover body, wherein observation holes are formed in the upper portion and the bottom of the side wall cover body, namely a top observation hole and a bottom observation hole, the top observation hole is formed in the top end of the side wall cover body, and the bottom observation hole is formed in the bottom end of the side wall cover body. Generally, the bottom observation hole of the observation device is equal in size and coincides with the opening of the vibrating screen cover plate. The observation device can ensure that the optical channel of the thermal imaging instrument for imaging the activated carbon particles on the vibrating screen through the top observation hole and the bottom observation hole is smooth, the height of the observation device can be determined according to experience or adjusted as required, and the constraint condition of the observation device mainly ensures that the side surface of the observation device has enough dust absorption area and ensures that the activated carbon particles cannot jump out of the vibrating screen. Meanwhile, the observation device can play a role in eliminating observation obstacles and optimizing the imaging environment and the imaging background.

According to the invention, the thermal imager reciprocates in a vertical plane around the observation device, so that the material entering the first imaging area or the second imaging area can be shot in real time through the observation device, a primary thermal imaging image or a secondary thermal imaging image is obtained, and the high-temperature detection of the material is realized more accurately. Correspondingly, the observation device also comprises a front cover plate arranged on the upstream side of the bottom observation hole and a rear cover plate arranged on the downstream side of the bottom observation hole. According to the position change of the thermal imaging camera which reciprocates in a vertical plane around the observation device, the front cover plate and the rear cover plate synchronously move in the plane where the bottom observation hole is located along the length direction of the vibrating screen, namely the positions of the front cover plate and the rear cover plate in the observation device are adjusted according to the installation position of the thermal imaging camera. The center of a pore formed among the front cover plate, the rear cover plate and the bottom observation hole, the center of the top observation hole and the thermal imager are on the same straight line. The front cover plate and the rear cover plate are arranged to further avoid the problem caused by the large-size observation hole formed in the vibrating screen cover plate, reduce the requirement on dust removal air volume and simultaneously still meet the requirement of a thermal imager for detecting high-temperature activated carbon particles.

Preferably, in the technical solution of the present application, one or more thermal imaging cameras may be provided. In specific implementation, can set up a plurality of thermal imaging cameras, shoot the material that gets into in the formation of image district through controlling a plurality of independent thermal imaging cameras and acquire the thermal imaging image to guarantee not to omit the material among the high temperature testing process, solved the problem that is difficult to detect comprehensively among the prior art. Simultaneously, the thermal imaging system is around viewing device reciprocating motion in vertical plane, and the position of thermal imaging system can move along with the transport of material on the shale shaker promptly, and to the material of suspected high temperature point, the thermal imaging system can further track and judge to make and detect more accurately, also more be favorable to realizing the comprehensiveness that detects.

Preferably, the side wall cover body of the observation device is provided with a dust removal opening, and the dust collection cover is arranged on the dust removal opening. The dust absorption cover is connected with a dust absorption pipeline and is connected with a dust removal device through the dust absorption pipeline, the dust absorption capacity of the dust absorption cover can ensure that no dust overflows when the vibrating screen works, and the problem of high dust concentration of active carbon particles during screening is solved.

In the invention, the high-temperature detection system of the activated carbon flue gas purification device further comprises a main process computer control system (for short, master control) and a data processing module. The method comprises the steps that after a thermal imager acquires a thermal imaging image of a material in an imaging area, whether a high-temperature point exists in the corresponding material or not is judged according to the thermal imaging image, data information judged as the high-temperature point is transmitted to a data processing module, the data processing module is connected with a main control, an alarm is sent to the main control, and the main control enters the next processing flow.

In the present application, the material refers to activated carbon, and is generally fresh activated carbon after being desorbed by an desorption tower.

In the present application, the terms "upstream" and "downstream" refer to a relative concept in terms of the flow direction of the activated carbon particles on a conveyor such as a vibrating screen or a conveyor, that is, a position where the activated carbon particles pass first on the conveyor is upstream, and a position where the activated carbon particles pass later on the conveyor is downstream.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, a high-temperature detection mode of the thermal imager is adopted, and accurate judgment data of the high-temperature point is obtained by preliminarily judging the suspected high-temperature point and tracking and judging the suspected high-temperature point, so that the detection accuracy is improved.

2. According to the technical scheme provided by the invention, under the condition that the materials in the imaging area on the vibrating screen are identified to have high temperature points, the water spraying amount of the cooling water spraying device can be accurately controlled, the high-temperature materials are extinguished and cooled, meanwhile, the liquid water is prevented from being brought into a conveying system, and the safety of the system is improved.

3. In the invention, the thermal imaging instrument reciprocates in a vertical plane around the observation device, namely the position of the thermal imaging instrument can move along with the conveying of materials on the vibrating screen, thereby being beneficial to tracking and judging the materials and simultaneously solving the problem that high-temperature activated carbon particles in the activated carbon flue gas purification device are difficult to detect comprehensively.

4. According to the invention, the observation device is arranged between the vibrating screen cover plate and the thermal imager, so that the problem that a large-size observation hole is formed in the vibrating screen cover plate due to detection is avoided, observation obstacles can be eliminated due to the arrangement of the observation device, the imaging environment and the imaging background are optimized, and meanwhile, the activated carbon particles are prevented from jumping out of the vibrating screen, so that the safe and stable operation of the activated carbon flue gas purification device is ensured.

Drawings

FIG. 1 is a schematic diagram of an activated carbon desulfurization and denitrification apparatus in the prior art;

FIG. 2 is a schematic diagram of a prior art desorption tower;

FIG. 3 is a flow chart of a method for detecting the high temperature of the activated carbon and cooling and extinguishing the spontaneous combustion activated carbon according to the present invention;

FIG. 4 is a schematic diagram of a thermal imager acquiring a single thermal image of a material in a first imaging region in accordance with the present invention;

FIG. 5 is a schematic diagram of a thermal imager of the present invention acquiring a second thermal image of the material in the second imaging area;

FIG. 6 is a schematic view of the position and structure of the observation device according to the present invention;

FIG. 7 is a diagram showing the relationship between the thermal imager, the main control module and the data processing module;

fig. 8 is a data processing flow chart of the thermal imager of the present invention;

FIG. 9 is a schematic structural diagram of an activated carbon high-temperature detection and spontaneous combustion activated carbon cooling and extinguishing system according to the present invention;

FIG. 10 is a schematic structural diagram of another system for high-temperature detection and spontaneous combustion cooling and extinguishing of activated carbon according to the present invention;

FIG. 11 is a logic diagram of a high temperature activated carbon particle process flow of the present invention;

FIG. 12 is a top view of the spontaneous combustion activated carbon quenching cooling device of the present invention;

fig. 13 is a front view of the spontaneous combustion activated carbon quenching cooling device of the invention.

Reference numerals:

1: a thermal imager; 2: vibrating screen; 201: a cover plate; 3: an imaging area; 301: a first imaging region; 302: a second imaging area; 4: an observation device; 401: a sidewall mask body; 402: a top viewing aperture; 403: a bottom viewing aperture; 404: a front cover plate; 405: a rear cover plate; 5: a conveyor; 501: a chain bucket; 6: a cooling water spray device; 601: a cooling water main pipe; 602: cooling water branch pipes; 603: a spray orifice; 604: a cooling water valve; a1: a data processing module; a2: a main process computer control system.

Detailed Description

A system for detecting the high temperature of the activated carbon and cooling and extinguishing the spontaneous combustion activated carbon or a system for detecting the high temperature of the activated carbon and cooling and extinguishing the spontaneous combustion activated carbon in the method of the first embodiment comprises a thermal imaging camera 1, a vibrating screen 2, a conveyor 5 and a spontaneous combustion activated carbon extinguishing and cooling device. And the discharge opening of the vibrating screen 2 is connected with the feed opening of the conveyor 5. The vibrating screen 2 is provided with a cover plate 201. The thermal imaging camera 1 is disposed above the cover plate 201 of the vibrating screen 2. The conveyer includes horizontal segment and vertical section, spontaneous combustion active carbon extinguishes cooling device and sets up the top at 5 horizontal segments of conveyer. And an imaging area 3 is arranged on the vibrating screen 2.

In the invention, the spontaneous combustion activated carbon extinguishing cooling device is a cooling water spraying device 6 arranged above the horizontal section of the conveyor 5. Preferably, the conveyor 5 is a bucket conveyor, a plurality of buckets 501 are uniformly arranged in the bucket conveyor, and each bucket 501 is opened upwards. The cooling water sprinkler 6 includes a cooling water main pipe 601 and a cooling water branch pipe 602. The cooling water main pipe 601 and the cooling water branch pipe 602 are both disposed right above the horizontal section of the conveyor 5. One end of the cooling water main pipe 601 is provided with a cooling water inlet, and the other end of the cooling water main pipe 601 is connected to the cooling water branch pipe 602. The lower edge of the cooling water branch pipe 602 is provided with a spray hole 603.

Preferably, the cooling water main pipe 601 is further provided with a cooling water valve 604, and the cooling water valve 604 controls the cooling water spraying device 6 to be opened and closed. Preferably, the cooling water branch pipes 602 are disposed in parallel at the upper portion of the chain bucket 501 and perpendicular to the longitudinal direction of the conveyor 5. The cooling water branch pipe 602 is provided with a plurality of spraying holes 603, and the plurality of spraying holes 603 are uniformly distributed. Preferably, the length of the cooling water branch pipe 602 is equal or substantially equal to the width of the chain bucket 501.

In the present invention, the system further comprises a viewing device 4. The observation device 4 is arranged on the upper part of the cover plate 201 of the vibrating screen 2 and is positioned between the cover plate 201 of the vibrating screen 2 and the thermal imaging camera 1. Preferably, the observation device 4 is a thermal imaging camera observation cover. The thermal imaging camera view enclosure includes a sidewall enclosure 401, a top view port 402, and a bottom view port 403. The top observation hole 402 is defined as the area surrounded by the top edges of the side wall shells 401. The bottom viewing aperture 403 is defined by the bottom edge of the sidewall shroud 401.

Preferably, the imaging zone 3 on the shaker 2 comprises a first imaging zone 301 and a second imaging zone 302, the first imaging zone 301 being located upstream of the second imaging zone 302. The thermal imaging system 1 reciprocates in a vertical plane around the observation device 4, and the thermal imaging system 1 shoots materials entering the first imaging area 301 and/or the second imaging area 302 on the vibrating screen 2 in real time through the observation device 4 to obtain a primary thermal imaging image and/or a secondary thermal imaging image.

Preferably, the thermal imaging camera observation cover further includes a front cover 404 and a rear cover 405. A front cover 404 is provided at the bottom of the side wall cover 401, and is located on the upstream side of the bottom observation hole 403. A rear cover plate 405 is provided at the bottom of the side wall enclosure 401, on the downstream side of the bottom observation hole 403.

Preferably, the front cover plate 404 and the rear cover plate 405 move along the length direction of the vibrating screen 2 in the plane of the bottom observation hole 403 in synchronization with the change in the position of the thermal imaging camera 1 reciprocating in the vertical plane around the observation device 4. Preferably, the center of the aperture formed between the front cover plate 404 and the rear cover plate 405, the center of the top observation hole 402, and the thermal imaging camera 1 are aligned in the same line.

Preferably, the cover plate 201 of the vibrating screen 2 is provided with an opening. The width of the openings is equal or substantially equal to the width of the vibrating screen 2. The thermal imaging camera observation cover is positioned on the upper part of the opening on the cover plate 201 of the vibrating screen 2. Preferably, the bottom observation hole 403 of the thermal imaging camera observation cover is equal in size and coincides with the opening of the cover plate 201 of the vibrating screen 2.

In the present invention, the system also includes a data processing module A1 and a main process computer control system A2. The thermal imager 1 is connected with a data processing module A1, the data processing module A1 is connected with a main process computer control system A2, and meanwhile, a cooling water valve 604 of the cooling water spraying device 6 is connected with a main process computer control system A2. The main process computer control system a2 controls the operation of the data processing module a1, the thermal imager 1, and the cooling water valve 604.

Example 1

As shown in fig. 9, the system for detecting the high temperature of the activated carbon and cooling and extinguishing the spontaneous combustion activated carbon comprises a thermal imaging camera 1, a vibrating screen 2, a conveyor 5 and a spontaneous combustion activated carbon extinguishing and cooling device. And the discharge opening of the vibrating screen 2 is connected with the feed opening of the conveyor 5. The vibrating screen 2 is provided with a cover plate 201. The thermal imaging camera 1 is disposed above the cover plate 201 of the vibrating screen 2. The conveyer includes horizontal segment and vertical section, spontaneous combustion active carbon extinguishes cooling device and sets up the top at 5 horizontal segments of conveyer. And an imaging area 3 is arranged on the vibrating screen 2.

Example 2

As shown in fig. 12 and 13, example 1 was repeated except that the spontaneous combustion activated carbon extinction cooling device was a cooling water spray device 6 disposed above the horizontal section of the conveyor 5. The conveyor 5 is a bucket chain conveyor, a plurality of chain buckets 501 are uniformly arranged in the bucket chain conveyor, and each chain bucket 501 is upward opened. The cooling water sprinkler 6 includes a cooling water main pipe 601 and a cooling water branch pipe 602. The cooling water main pipe 601 and the cooling water branch pipe 602 are both disposed right above the horizontal section of the conveyor 5. One end of the cooling water main pipe 601 is provided with a cooling water inlet, and the other end of the cooling water main pipe 601 is connected to the cooling water branch pipe 602. The lower edge of the cooling water branch pipe 602 is provided with a spray hole 603.

Example 3

Embodiment 2 is repeated except that the cooling water main pipe 601 is further provided with a cooling water valve 604, and the cooling water valve 604 controls the cooling water spraying device 6 to be opened and closed. The cooling water branch pipes 602 are arranged in parallel at the upper part of the chain bucket 501 and are arranged perpendicular to the length direction of the conveyor 5. The cooling water branch pipe 602 is provided with a plurality of spraying holes 603, and the plurality of spraying holes 603 are uniformly distributed. The length of the cooling water branch pipe 602 is equal to the width of the chain bucket 501.

Example 4

As shown in fig. 4-6, example 3 is repeated except that the system further comprises a viewing device 4. The observation device 4 is arranged on the upper part of the cover plate 201 of the vibrating screen 2 and is positioned between the cover plate 201 of the vibrating screen 2 and the thermal imaging camera 1. The observation device 4 is a thermal imager observation cover. The thermal imaging camera view enclosure includes a sidewall enclosure 401, a top view port 402, and a bottom view port 403. The top observation hole 402 is defined as the area surrounded by the top edges of the side wall shells 401. The bottom viewing aperture 403 is defined by the bottom edge of the sidewall shroud 401.

Imaging zone 3 on shaker 2 includes a first imaging zone 301 and a second imaging zone 302, with first imaging zone 301 being upstream of second imaging zone 302. The thermal imaging system 1 reciprocates in a vertical plane around the observation device 4, and the thermal imaging system 1 shoots materials entering a first imaging area 301 and a second imaging area 302 on the vibrating screen 2 in real time through the observation device 4 to obtain a primary thermal imaging image and a secondary thermal imaging image.

Example 5

Example 4 was repeated except that the thermal imaging camera observation cover further included a front cover plate 404 and a rear cover plate 405. A front cover 404 is provided at the bottom of the side wall cover 401, and is located on the upstream side of the bottom observation hole 403. A rear cover plate 405 is provided at the bottom of the side wall enclosure 401, on the downstream side of the bottom observation hole 403. According to the position change of the thermal imaging camera 1 reciprocating in the vertical plane around the observation device 4, the front cover plate 404 and the rear cover plate 405 synchronously move along the length direction of the vibrating screen 2 in the plane of the bottom observation hole 403. The center of the aperture formed between the front cover plate 404 and the rear cover plate 405, the center of the top observation hole 402, and the thermal imaging camera 1 are in the same straight line.

Example 6

Example 5 is repeated except that the cover plate 201 of the vibrating screen 2 is provided with openings. The width of the opening is equal to the width of the vibrating screen 2. The thermal imaging camera observation cover is positioned on the upper part of the opening on the cover plate 201 of the vibrating screen 2. The bottom observation hole 403 of the thermal imaging camera observation cover is equal in size and coincident in position with the opening hole in the cover plate 201 of the vibrating screen 2.

Example 7

Example 6 is repeated, as shown in fig. 7 and 10, except that the system further includes a data processing module a1 and a main process computer control system a 2. The thermal imager 1 is connected with a data processing module A1, the data processing module A1 is connected with a main process computer control system A2, and meanwhile, a cooling water valve 604 of the cooling water spraying device 6 is connected with a main process computer control system A2. The main process computer control system a2 controls the operation of the data processing module a1, the thermal imager 1, and the cooling water valve 604.

Example 8

As shown in fig. 3, a method for detecting high temperature of activated carbon and quenching spontaneous combustion activated carbon by cooling comprises the following steps:

1) the thermal imaging instrument 1 shoots the material entering the imaging area 3 on the vibrating screen 2 in real time to obtain a thermal imaging image;

2) analyzing and judging whether the material entering the imaging area 3 has a high temperature point or not according to the thermal imaging image;

2a) if the thermal imaging image does not have the high temperature point, repeating the step 1);

2b) if the thermal imaging image is judged to have a high temperature point, recording the found position of the material at the high temperature point in the imaging area 3 on the vibrating screen 2;

3) and when the materials at the high-temperature point are moved to the conveyor 5, carrying out water spraying cooling treatment on the corresponding high-temperature materials.

Example 9

Repeat embodiment 8, only in step 3), carry out water spray cooling to corresponding high temperature material and handle, specifically do: when the materials at the high-temperature point are moved to the horizontal section of the conveyor 5 by the vibrating screen 2, the corresponding high-temperature materials are sprayed with water and cooled by the spontaneous combustion activated carbon extinguishing cooling device, so that the high-temperature materials are extinguished and cooled.

Example 10

The procedure of example 9 was repeated to give,only in step 3), the water spraying amount LL of the water spraying cooling treatment_HSatisfies the following relation:

Example 11

Example 10 was repeated except that the spontaneous combustion activated carbon extinction cooling device was a cooling water spray device 6 disposed above the horizontal section of the conveyor 5. The conveyor 5 is a bucket chain conveyor, a plurality of chain buckets 501 are uniformly arranged in the bucket chain conveyor, and each chain bucket 501 is upward opened. The cooling water sprinkler 6 includes a cooling water main pipe 601 and a cooling water branch pipe 602. The cooling water main pipe 601 and the cooling water branch pipe 602 are both disposed right above the horizontal section of the conveyor 5. One end of the cooling water main pipe 601 is provided with a cooling water inlet, and the other end of the cooling water main pipe 601 is connected to the cooling water branch pipe 602. The lower edge of the cooling water branch pipe 602 is provided with a spray hole 603.

Example 12

Embodiment 11 is repeated, except that the cooling water main pipe 601 is further provided with a cooling water valve 604, and the cooling water valve 604 controls the cooling water spraying device 6 to be opened and closed. The cooling water branch pipes 602 are arranged in parallel at the upper part of the chain bucket 501 and are arranged perpendicular to the length direction of the conveyor 5. The cooling water branch pipe 602 is provided with a plurality of spraying holes 603, and the plurality of spraying holes 603 are uniformly distributed. The length of the cooling water branch pipe 602 is equal to the width of the chain bucket 501.

Example 13

As shown in fig. 11, example 12 was repeated except that in step 2b), when it was judged that the thermal imaging image had a high temperature point, the time at which the position of the material at the high temperature point was found in the imaging zone 3 on the vibrating screen 2 was recorded was set to t 0.

The step 3) specifically comprises the following steps:

3a) acquiring a distance XL1 between the found position and the tail part of the vibrating screen 2 and a distance XL2 between the tail part of the vibrating screen 2 and the cooling water branch pipe 602 of the cooling water spraying device 6, and combining a material running speed V1 on the vibrating screen 2 and a material running speed V2 on the conveyor 5 to obtain a time t1 required by the material at the high temperature point to run from the found position to the setting position of the cooling water branch pipe 602 of the cooling water spraying device 6:

3b) starting from the time t0, after the time t1 elapses, the cooling water valve 604 is opened, and the cooling water spraying device 6 performs water spraying and temperature reduction treatment on the corresponding high-temperature material;

3c) after the cooling water spraying device 6 sprays water to the high-temperature material for a duration t2, closing the cooling water valve 604, and enabling the high-temperature material to achieve the effect of extinguishing cooling; wherein the water spray duration t2 satisfies the following relation:

wherein: k2 is coefficient, k2 ═ 3; LJ is the link length of the conveyor, mm.

Example 14

Example 13 is repeated except that the vibrating screen 2 is provided with a cover plate 201, and the material entering the vibrating screen 2 moves along the length direction of the vibrating screen 2. The imaging zone 3 comprises a first imaging zone 301 and a second imaging zone 302. On the shaker 2, a first imaging zone 301 is located upstream of a second imaging zone 302.

In step 1), the thermal imaging instrument 1 shoots the material entering the imaging area 3 on the vibrating screen 2 in real time to obtain a thermal imaging image, which specifically comprises:

1a) arranging a thermal imager 1 above a cover plate 201 of a vibrating screen 2, wherein an observation device 4 is arranged at the upper part of the cover plate 201 of the vibrating screen 2, and the observation device 4 is positioned between the cover plate 201 of the vibrating screen 2 and the thermal imager 1;

1b) the thermal imaging system 1 reciprocates in a vertical plane around the observation device 4, and the thermal imaging system 1 shoots materials entering a first imaging area 301 and a second imaging area 302 on the vibrating screen 2 in real time through the observation device 4 to obtain a primary thermal imaging image and a secondary thermal imaging image.

Example 15

As shown in fig. 8, the embodiment 14 is repeated, except that in step 2), whether the material entering the imaging area 3 has a high temperature point is judged according to the thermal imaging image analysis, specifically:

the thermal imaging instrument 1 shoots the material entering the first imaging area 301 on the vibrating screen 2 in real time to obtain a primary thermal imaging image. And acquiring the highest temperature value T1 in the primary thermal imaging image according to the primary thermal imaging image, and comparing the highest temperature value T1 with the set target temperature T0. And if T1 is not more than T0, judging that the primary thermal imaging image does not have a high temperature point, and repeating the step 1). And if T1 is greater than T0, judging that the primary thermal imaging image has a suspected high-temperature point. T0 has a value of 415 ℃.

When the primary thermal imaging image is judged to have the suspected high temperature point, the thermal imaging instrument 1 tracks and shoots a secondary thermal imaging image in which the material at the suspected high temperature point enters the second imaging area 302 on the vibrating screen 2, and further judges whether the suspected high temperature point is the high temperature point.

Dividing the secondary thermal imaging image into 9 areas of the nine-square grid, obtaining the highest temperature of each of the 9 areas, selecting the highest temperature value T2 of the 9 highest temperatures, and comparing the highest temperature value T2 with a set target temperature T0. If T2 is not more than T0, the suspected high temperature point is judged to be a false high temperature point, and the step 1) is repeated. And if T2 is greater than T0, confirming that the suspected high temperature point is the high temperature point. The highest temperature value T2 is used to correspond to the area on the secondary thermal image, so as to determine and record the found position of the material on the vibrating screen 2 in the second imaging area 302.

Example 16

Example 15 was repeated except that the observation device 4 was a thermal imaging camera observation cap. The thermal imaging camera view enclosure includes a sidewall enclosure 401, a top view port 402, and a bottom view port 403. The top observation hole 402 is defined as the area surrounded by the top edges of the side wall shells 401. The bottom viewing aperture 403 is defined by the bottom edge of the sidewall shroud 401. The thermal imaging system 1 shoots the materials entering the first imaging area 301 and the second imaging area 302 on the vibrating screen 2 in real time through the top observation hole 402 and the bottom observation hole 403, and then obtains a primary thermal imaging image and a secondary thermal imaging image.

Example 17

Example 16 is repeated except that the thermal imager viewing mask further comprises a front cover 404 and a back cover 405. A front cover 404 is provided at the bottom of the side wall cover 401, and is located on the upstream side of the bottom observation hole 403. A rear cover plate 405 is provided at the bottom of the side wall enclosure 401, on the downstream side of the bottom observation hole 403. The front cover plate 404 and the rear cover plate 405 move along the length direction of the vibrating screen 2 in the plane where the bottom observation hole 403 is located in synchronization with the change in the position of the thermal imaging camera 1 reciprocating in the vertical plane around the observation device 4. The center of the aperture formed between the front cover plate 404 and the rear cover plate 405, the center of the top observation hole 402, and the thermal imaging camera 1 are in the same straight line.

Example 18

Example 17 is repeated except that the cover plate 201 of the vibrating screen 2 is provided with openings. The width of the opening is equal to the width of the vibrating screen 2. The thermal imaging camera observation cover is positioned on the upper part of the opening on the cover plate 201 of the vibrating screen 2. The bottom observation hole 403 of the thermal imaging camera observation cover is equal in size and coincident in position with the opening hole in the cover plate 201 of the vibrating screen 2.

Example 19

Example 18 was repeated except that the thermal imager 1 was connected to a data processing module a1, the data processing module a1 was connected to the main process computer control system a2, and the cooling water valve 604 of the cooling water spray device 6 was connected to the main process computer control system a 2. When the material entering the imaging area 3 is analyzed and judged to have a high temperature point according to the thermal imaging image, the data processing module A1 gives an alarm to the main process computer control system A2, and the main process computer control system A2 realizes the water spraying and temperature reducing treatment on the corresponding high temperature material by controlling the operation of the cooling water valve 604.

Application example 1

A method for detecting high temperature of activated carbon and quenching spontaneous combustion activated carbon by cooling, which uses the system in example 7, and comprises the following steps:

1) the thermal imaging instrument 1 shoots the material entering the first imaging area 301 on the vibrating screen 2 in real time to obtain a primary thermal imaging image;

2) and analyzing and judging whether the material entering the imaging area 3 has a high temperature point according to the primary thermal imaging image:

according to the primary thermal imaging image, the highest temperature value T1 in the primary thermal imaging image is obtained to be 150 ℃, and the highest temperature value T1 is compared with the set target temperature T0. T0 has a value of 415 ℃. Since T1 < T0, the primary thermographic image was judged not to have a high temperature point. Repeat step 1).

Application example 2

A method for detecting high temperature of activated carbon and quenching spontaneous combustion activated carbon by cooling, which uses the system in example 7, and comprises the following steps:

1) the thermal imaging instrument 1 shoots the material entering the first imaging area 301 on the vibrating screen 2 in real time to obtain a primary thermal imaging image;

2) and analyzing and judging whether the material entering the imaging area 3 has a high temperature point according to the primary thermal imaging image:

and acquiring a maximum temperature value T1 in the primary thermal imaging image as 416 ℃ according to the primary thermal imaging image, and comparing the maximum temperature value T1 with a set target temperature T0. T0 has a value of 415 ℃. Since T1 > T0, the primary thermographic image is judged to have a suspected high temperature point.

The thermal imaging system 1 tracks and shoots a secondary thermal imaging image of the material at the suspected high-temperature point entering the second imaging area 302 on the vibrating screen 2, and further judges whether the suspected high-temperature point is a high-temperature point:

Application example 3

A high-temperature detection method for an activated carbon flue gas purification device uses the system in embodiment 6, and comprises the following steps:

1) the thermal imaging instrument 1 shoots the material entering the first imaging area 301 on the vibrating screen 2 in real time to obtain a primary thermal imaging image;

2) and analyzing and judging whether the material entering the first imaging area 301 has a high temperature point according to the primary thermal imaging image:

and acquiring a maximum temperature value T1 in the primary thermal imaging image as 420 ℃ according to the primary thermal imaging image, and comparing the maximum temperature value T1 with a set target temperature T0. T0 has a value of 415 ℃. Since T1 > T0, the primary thermographic image is judged to have a suspected high temperature point.

dividing the secondary thermal imaging image into nine-grid squares, obtaining the highest temperature of each of the 9 areas, selecting the highest temperature value T2 of the 9 highest temperatures as 421 ℃, and comparing the highest temperature value T2 with a set target temperature T0. Since T2 > T0, the suspected high temperature point was confirmed to be a high temperature point. The highest temperature value T2 is used to correspond to the area on the secondary thermal image, so as to determine and record the found position of the material on the vibrating screen 2 in the second imaging area 302.

3) When the materials at the high-temperature point are moved to the horizontal section of the conveyor 5 by the vibrating screen 2, the corresponding high-temperature materials are sprayed with water and cooled by the spontaneous combustion activated carbon extinguishing cooling device, so that the high-temperature materials are extinguished and cooled.

The time at which the position of the material at the high temperature point found in the imaging zone 3 on the vibrating screen 2 is recorded is set to t 0.

The step 3) specifically comprises the following steps:

3a) obtaining the distance XL1 between the found position and the tail part of the vibrating screen 2 to be 2000mm, the distance XL2 between the tail part of the vibrating screen 2 and the cooling water branch pipe 602 of the cooling water spraying device 6 to be 8000mm, the running speed V1 of the material on the vibrating screen 2 to be 100mm/s, and the running speed V2 of the material on the conveyor 5 to be 400mm/s, and obtaining the time t1 required by the material at the high temperature point to run from the found position to the setting position of the cooling water branch pipe 602 of the cooling water spraying device 6:

wherein: k2 is coefficient, k2 ═ 3; LJ is the link length of the conveyor, and LJ is 300 mm.

Wherein the water spraying amount LL of the water spraying cooling treatment_HComprises the following steps:

wherein: LL (LL)_HThe flow rate of the cooling water sprayed in unit time is kg/s. C_htIs the specific heat capacity of activated carbon, C_ht＝0.84kJ/(kg·℃)。 LL_htFor the flow of the cooled activated carbon to be extinguished, LL_ht＝5kg/s。ΔT_htFor activated carbon cooling purposes, Δ T_ht＝80℃。C_H1Specific heat capacity of water at 100 ℃ under standard atmospheric pressure, C_H1＝4.22kJ/(kg·℃)。T_e1Is the evaporation temperature of water, T_e1＝100℃。T_e2Is the initial temperature of the cooling water, T_e2＝25℃。C_H2Specific heat capacity of water at initial temperature, C_H2＝4.177kJ/(kg·℃)。h_hzThe latent heat of vaporization of water at 100 ℃ under standard atmospheric pressure, h_hz＝2257.1kJ/kg。

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Method and system for high-temperature detection of activated carbon and cooling and extinguishing of spontaneous combustion activated carbon

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