阅读说明：本技术 一种氧化钙分级悬浮煅烧工艺自动控制系统 (Automatic control system for calcium oxide classification suspension calcination process ) 是由 吴根祥 胡新平 谢滔 于 2021-10-08 设计创作，主要内容包括：本发明公开了一种氧化钙分级悬浮煅烧工艺自动控制系统,属于氧化钙生产技术领域,其技术方案要点包括原料磨自动控制系统、悬浮窑自动控制系统和生产系统,通过研磨设备状态自动调节维持设备稳定,研磨磨机风温控制控制进出磨温度在正常要求范围内,原料细度控制设定更合理的细度要求,系统风量控制对进入系统的总风量和外部空气的温度湿度进行监控,同时依据氧化钙冷却温度和分解炉内压力自动调节第一风机的用风量,自动调节高温高压风机的排风量,分解炉内燃料调节对两个分解炉内的温度进行控制,氧化钙成品检测分析成品氧化钙的纯度与细度,本系统通过对氧化钙煅烧过程进行精确控制,有效提高了成品的质量,同时提高了生产效率。(The invention discloses an automatic control system for a calcium oxide grading suspension calcining process, which belongs to the technical field of calcium oxide production, and has the technical scheme that the automatic control system comprises a raw material mill automatic control system, a suspension kiln automatic control system and a production system, the equipment is maintained to be stable through automatic adjustment of the state of grinding equipment, the air temperature of a grinding mill is controlled to control the temperature of the grinding in and out of the grinding mill to be within a normal requirement range, more reasonable fineness requirements are set for the raw material fineness control, the air quantity control of the system monitors the total air quantity entering the system and the temperature and humidity of the outside air, the air quantity of a first fan is automatically adjusted according to the cooling temperature of calcium oxide and the pressure in a decomposing furnace, the air quantity of a high-temperature high-pressure fan is automatically adjusted, the fuel adjustment in the decomposing furnace controls the temperatures in the two decomposing furnaces, the finished calcium oxide product detects and analyzes the purity and the fineness of the finished calcium oxide, and the system accurately controls the calcium oxide calcining process, the quality of finished products is effectively improved, and meanwhile, the production efficiency is improved.)

1. The automatic control system for the calcium oxide classification suspension calcining process comprises a raw material mill automatic control system, a suspension kiln automatic control system and a production system, and is characterized in that: the production system is respectively and electrically connected with a raw material mill automatic control system and a suspension kiln automatic control system, the raw material mill automatic control system comprises automatic grinding equipment state adjustment, grinding mill air temperature control and raw material fineness control, and the suspension kiln automatic control system comprises system air volume control, decomposition furnace fuel adjustment, calcium oxide finished product detection and preheater temperature control;

the production system comprises a limestone storage device, wherein the output end of the limestone storage device is fixedly connected with a limestone powder preparation device, the material output end of the limestone powder preparation device is fixedly connected with a feeding device, the output end of the feeding device is fixedly connected with a second heating hopper, the airflow output end of the second heating hopper is fixedly connected with a first heating hopper, the material output end of the first heating hopper is fixedly connected with a third heating hopper, the output end of the second heating hopper is fixedly connected with a fourth heating hopper, the output end of the third heating hopper is fixedly connected with a fifth heating hopper, the output end of the fourth heating hopper is fixedly connected with a primary decomposing furnace, the output end of the primary decomposing furnace is fixedly connected with a secondary decomposing furnace, the output end of the secondary decomposing furnace is fixedly connected with an aging kettle, and the output end of the aging kettle is fixedly connected with a primary cooling hopper, the material output end fixedly connected with first fan of one-level cooling fill, the output fixedly connected with second grade cooling fill of first fan, the air current output end fixedly connected with high temperature high pressure positive blower of one-level cooling fill, the output fixedly connected with precombustion chamber of high temperature high pressure positive blower, the air current output end fixedly connected with storage device of second grade cooling fill.

2. The automatic control system for the calcium oxide classification suspension calcination process according to claim 1, characterized in that: the air flow output end of the first heating hopper is fixedly connected with a second fan, the output end of the second fan is fixedly connected with a powder filtering and collecting device, the output end of the powder filtering and collecting device is fixedly connected with a waste gas treatment device, and the output end of the waste gas treatment device is fixedly connected with a chimney.

3. The automatic control system for the calcium oxide classification suspension calcination process according to claim 1, characterized in that: the fuel regulation in the decomposing furnace comprises decomposing furnace coal consumption regulation and decomposing furnace gas consumption regulation, and the decomposing furnace coal consumption regulation and the decomposing furnace gas consumption regulation are respectively and electrically connected with the primary decomposing furnace and the secondary decomposing furnace.

4. The automatic control system for the calcium oxide classification suspension calcination process according to claim 1, characterized in that: the automatic grinding equipment state adjustment, the grinding mill air temperature control and the raw material fineness control are respectively electrically connected with the limestone powder preparation device.

5. The automatic control system for the calcium oxide classification suspension calcination process according to claim 1, characterized in that: the system air volume control is respectively and electrically connected with the first fan, the high-temperature high-pressure fan and the second fan.

6. The automatic control system for the calcium oxide classification suspension calcination process according to claim 1, characterized in that: and the calcium oxide finished product detection and storage device are electrically connected.

7. The automatic control system for the calcium oxide classification suspension calcination process according to claim 1, characterized in that: the temperature control of the preheater is electrically connected with the precombustion chamber.

8. The automatic control method of the calcium oxide grading suspension calcining process comprises the following steps: the grinding equipment state is automatically adjusted according to the current of a main motor of the grinding machine and the pressure difference between the feeding and the discharging of the grinding machine, the feeding amount of a feeding belt scale is automatically adjusted, the stability of the equipment is maintained, the air temperature of the grinding machine is controlled under the condition of setting the output power of an exhaust fan to be constant, the temperature of the feeding and the discharging of the grinding machine is automatically adjusted and controlled within the normal required range through the hot air valve and the cold air valve of the feeding and the discharging of the grinding machine, the fineness of raw materials is controlled according to the fineness of the fed raw materials of previous batches and the fineness of the produced calcium oxide products, a rough rule is obtained after multiple times of statistics, so that a more reasonable fineness requirement is set, the air quantity of a system is controlled to monitor the total air quantity entering the system and the temperature and humidity of outside air, meanwhile, the air quantity of a first fan is automatically adjusted according to the cooling temperature of calcium oxide and the pressure in a decomposing furnace, the air quantity of a high-temperature high-pressure fan is automatically adjusted according to the outlet temperature of a precombustion chamber, and the fuel in the decomposing furnace is adjusted according to the temperature of the rotor scale in the decomposing furnace, the temperature in the decomposing furnace is controlled, the calcium oxide finished product is detected according to the data accumulation analysis of the calcium oxide on-line quality analyzer, namely the purity and fineness of the finished product calcium oxide are analyzed, the temperature control pre-combustion chamber of the preheater firstly combusts a part of fuel, the rest fuel is heated to a certain temperature to achieve the preheating purpose, and finally the waste gas and powder generated by the device are conveyed to the powder filtering and collecting device for filtering and collecting through the system air volume control second fan, then conveyed to the inside of the waste gas treatment device for treatment and then discharged from a chimney.

Technical Field

The invention relates to the technical field of calcium oxide production, in particular to an automatic control system for a calcium oxide grading suspension calcining process.

Background

The calcium oxide is obtained by calcining calcium carbonate at high temperature, the calcium carbonate can be decomposed to generate calcium oxide and carbon dioxide by calcining at high temperature, the suitable temperature in the process is 800-1000 ℃, the calcining temperature is over 1000 ℃, the calcium oxide and impurities in the calcium carbonate can easily generate silicate minerals, and the content of effective calcium oxide is reduced. The calcination is gradually transited from low temperature to high temperature, the heat preservation is carried out for a certain time, if the calcination is directly carried out at the high temperature, the calcium carbonate can be violently decomposed and broken into a plurality of small blocks.

In the existing calcium oxide grading suspension calcining process, a control system is not perfect enough, the calcium oxide calcining process cannot be accurately controlled, many steps need manual participation, on one hand, the efficiency is low, on the other hand, the efficiency is low depending on the technical experience of technicians, the efficiency is low when various conditions or requirements are met, and the quality of products is influenced.

Disclosure of Invention

Aiming at the problems, the invention provides an automatic control system for a calcium oxide classification suspension calcination process to solve the problems.

The invention is realized in this way, a calcium oxide classification suspension calcines the automatic control system of the process, including raw materials grind the automatic control system, suspend kiln automatic control system and production system, the said production system grinds the automatic control system and suspends the kiln automatic control system electrical connection with raw materials separately, grind mill automatic control system include grind apparatus state automatic regulation, grind mill wind temperature control and raw materials fineness control, suspend kiln automatic control system include systematic wind volume control, decompose furnace fuel regulation, calcium oxide finished product detection and temperature control of the preheater;

the production system comprises a limestone storage device, wherein the output end of the limestone storage device is fixedly connected with a limestone powder preparation device, the material output end of the limestone powder preparation device is fixedly connected with a feeding device, the output end of the feeding device is fixedly connected with a second heating hopper, the airflow output end of the second heating hopper is fixedly connected with a first heating hopper, the material output end of the first heating hopper is fixedly connected with a third heating hopper, the output end of the second heating hopper is fixedly connected with a fourth heating hopper, the output end of the third heating hopper is fixedly connected with a fifth heating hopper, the output end of the fourth heating hopper is fixedly connected with a primary decomposing furnace, the output end of the primary decomposing furnace is fixedly connected with a secondary decomposing furnace, the output end of the secondary decomposing furnace is fixedly connected with an aging kettle, and the output end of the aging kettle is fixedly connected with a primary cooling hopper, the material output end fixedly connected with first fan of one-level cooling fill, the output fixedly connected with second grade cooling fill of first fan, the air current output end fixedly connected with high temperature high pressure positive blower of one-level cooling fill, the output fixedly connected with precombustion chamber of high temperature high pressure positive blower, the air current output end fixedly connected with storage device of second grade cooling fill.

In order to facilitate the collection and treatment of powder and waste gas generated in the operation process of the device, the automatic control system for the calcium oxide classification suspension calcination process is preferably used, the airflow output end of the first heating hopper is fixedly connected with a second fan, the output end of the second fan is fixedly connected with a powder filtering and collecting device, the output end of the powder filtering and collecting device is fixedly connected with a waste gas treatment device, and the output end of the waste gas treatment device is fixedly connected with a chimney.

In order to facilitate the control of the temperature in the two decomposing furnaces, the automatic control system for the calcium oxide classification suspension calcination process is preferably used, wherein the fuel regulation in the decomposing furnaces comprises the regulation of the coal consumption of the decomposing furnaces and the regulation of the fuel gas consumption of the decomposing furnaces, and the regulation of the coal consumption of the decomposing furnaces and the regulation of the fuel gas consumption of the decomposing furnaces are respectively and electrically connected with the first-stage decomposing furnace and the second-stage decomposing furnace.

In order to control the limestone powder preparation device to grind the raw material to the required fineness, the automatic control system for the calcium oxide classification suspension calcination process is preferably used, and the automatic grinding equipment state adjustment, the grinding mill air temperature control and the raw material fineness control are respectively and electrically connected with the limestone powder preparation device.

In order to facilitate the control of the air volume of the system, the automatic control system for the calcium oxide classification suspension calcination process is preferably used, and the air volume control of the system is respectively and electrically connected with the first fan, the high-temperature high-pressure fan and the second fan.

In order to facilitate the detection of the quality of the calcium oxide finished product, the automatic control system for the calcium oxide classification suspension calcination process is preferably used, and the calcium oxide finished product detection is electrically connected with the storage device.

In order to preheat the fuel in the device, the automatic control system for the calcium oxide classification suspension calcination process is preferably used, and the temperature control of the preheater is electrically connected with the precombustion chamber.

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

the automatic control system for the calcium oxide graded suspension calcination process automatically adjusts the feeding amount of a feeding belt scale through automatic adjustment of the state of grinding equipment, maintains the stability of the equipment, controls the temperature of the grinding machine in and out of a grinding machine within a normal requirement range through air temperature control, sets a more reasonable fineness requirement for raw material fineness control, monitors the total air volume entering the system and the temperature and humidity of external air through system air volume control, automatically adjusts the air volume used by a first fan according to the cooling temperature of calcium oxide and the pressure in a decomposing furnace, automatically adjusts the air discharge volume of a high-temperature high-pressure fan according to the outlet temperature of a precombustion chamber, controls the temperature in the two decomposing furnaces through fuel adjustment in the decomposing furnace, detects and analyzes the purity and the fineness of calcium oxide finished products, counts data required to be counted in a large database through one batch, records through a large number of data, therefore, a more reasonable parameter range is obtained under the condition that certain objective conditions are fixed (such as ore purity, coal powder parameters, external input system air temperature and humidity and the like), the parameters are monitored, the parameters are finely adjusted in time, the calcium oxide calcination process is accurately controlled, the quality of finished products is effectively improved, and the production efficiency is improved.

Drawings

FIG. 1 is a circuit diagram of the present invention;

FIG. 2 is a process flow diagram of the present invention;

FIG. 3 is a circuit diagram of a portion of the structure of the present invention.

In the figure, 1, a raw material mill automatic control system; 2. an automatic control system of the suspension kiln; 3. a production system; 4. the state of the grinding equipment is automatically adjusted; 5. controlling the air temperature of the grinding mill; 6. controlling the fineness of the raw materials; 7. controlling the air quantity of the system; 8. adjusting fuel in the decomposing furnace; 9. detecting a calcium oxide finished product; 10. controlling the temperature of the preheater; 11. a limestone storage device; 12. limestone powder preparation device; 13. a feeding device; 14. a second heating hopper; 15. a first heating hopper; 16. a third heating hopper; 17. a fourth heating hopper; 18. fifthly, heating a bucket; 19. a first-stage decomposing furnace; 20. a secondary decomposing furnace; 21. an aging kettle; 22. a primary cooling hopper; 23. a first fan; 24. a secondary cooling hopper; 25. a high temperature and high pressure fan; 26. a precombustion chamber; 27. a material storage device; 28. a second fan; 29. a powder filtering and collecting device; 30. an exhaust gas treatment device; 31. a chimney; 32. adjusting the amount of the decomposition furnace coal; 33. adjusting the gas consumption of the decomposing furnace.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1-3, an automatic control system for a calcium oxide classification suspension calcination process comprises a raw material mill automatic control system 1, a suspension kiln automatic control system 2 and a production system 3, wherein the production system 3 is respectively electrically connected with the raw material mill automatic control system 1 and the suspension kiln automatic control system 2, the raw material mill automatic control system 1 comprises a grinding equipment state automatic adjustment 4, a grinding mill air temperature control 5 and a raw material fineness control 6, and the suspension kiln automatic control system 2 comprises a system air volume control 7, a fuel adjustment 8 in a decomposing furnace, a calcium oxide finished product detection 9 and a temperature control 10 of a preheater;

the production system 3 comprises a limestone storage device 11, the output end of the limestone storage device 11 is fixedly connected with a limestone powder preparation device 12, the material output end of the limestone powder preparation device 12 is fixedly connected with a feeding device 13, the output end of the feeding device 13 is fixedly connected with a second heating hopper 14, the airflow output end of the second heating hopper 14 is fixedly connected with a first heating hopper 15, the material output end of the first heating hopper 15 is fixedly connected with a third heating hopper 16, the output end of the second heating hopper 14 is fixedly connected with a fourth heating hopper 17, the output end of the third heating hopper 16 is fixedly connected with a fifth heating hopper 18, the output end of the fourth heating hopper 17 is fixedly connected with a primary decomposing furnace 19, the output end of the primary decomposing furnace 19 is fixedly connected with a secondary decomposing furnace 20, the output end of the secondary decomposing furnace 20 is fixedly connected with an aging kettle 21, the output end of the aging kettle 21 is fixedly connected with a primary cooling hopper 22, the material output end fixedly connected with first fan 23 of one-level cooling fill 22, the output fixedly connected with second grade cooling fill 24 of first fan 23, the air current output end fixedly connected with high temperature high pressure positive blower 25 of one-level cooling fill 22, the output fixedly connected with precombustion chamber 26 of high temperature high pressure positive blower 25, the air current output end fixedly connected with storage device 27 of second grade cooling fill 24.

In this embodiment: the feeding amount of the feeding belt scale is automatically adjusted through automatic adjustment 4 of the state of the grinding equipment, the stability of the equipment is maintained, the air temperature control 5 of a grinding mill controls the temperature of the inlet and the outlet of the grinding mill to be within a normal requirement range, the fineness control 6 of raw materials sets a more reasonable fineness requirement, the air quantity control 7 of the system monitors the total air quantity entering the system and the temperature and the humidity of external air, meanwhile, the air quantity used by a first fan 23 is automatically adjusted according to the cooling temperature of calcium oxide and the pressure in a decomposing furnace, the air quantity used by a high-temperature high-pressure fan 25 is automatically adjusted according to the outlet temperature of a pre-combustion chamber 26, the temperature in the two decomposing furnaces is controlled by fuel adjustment 8 in the decomposing furnace, and the calcium oxide finished product detection 9 analyzes the purity and the fineness of the finished calcium oxide product, the system counts data needing to be counted in a batch into a large database, and records a large number of data so as to obtain the purity under the condition of fixing objective conditions (such as ores, pulverized coal parameters, external input system air temperature and humidity and the like) to obtain a more reasonable parameter range, and simultaneously, the parameters are monitored, so that the parameters are finely adjusted in time, the calcium oxide calcination process is accurately controlled, the quality of finished products is effectively improved, and the production efficiency is improved.

As a technical optimization scheme of the invention, the airflow output end of the first heating hopper 15 is fixedly connected with a second fan 28, the output end of the second fan 28 is fixedly connected with a powder filtering and collecting device 29, the output end of the powder filtering and collecting device 29 is fixedly connected with an exhaust gas treatment device 30, and the output end of the exhaust gas treatment device 30 is fixedly connected with a chimney 31.

In this embodiment: the powder generated during the operation of the device is conveyed to the inside of the powder filtering and collecting device 29 by the second fan for filtering and collecting, and the waste gas generated during the operation of the device is conveyed to the inside of the waste gas treatment device 30 for treatment and then discharged from the chimney 31.

As a technical optimization scheme of the invention, the fuel regulation 8 in the decomposing furnace comprises a decomposing furnace coal dosage regulation 32 and a decomposing furnace fuel gas dosage regulation 33, and the decomposing furnace coal dosage regulation 32 and the decomposing furnace fuel gas dosage regulation 33 are respectively and electrically connected with the primary decomposing furnace 19 and the secondary decomposing furnace 20.

In this embodiment: the temperature in the two decomposing furnaces can be conveniently controlled by the arrangement of the decomposing furnace coal usage adjusting device 32 and the decomposing furnace gas usage adjusting device 33.

As a technical optimization scheme of the invention, the automatic grinding equipment state adjustment 4, the grinding mill air temperature control 5 and the raw material fineness control 6 are respectively and electrically connected with the limestone powder preparation device 12.

In this embodiment: the limestone powder preparation device 12 is respectively controlled to grind the raw material to the required fineness by the automatic grinding equipment state adjustment 4, the grinding mill air temperature control 5 and the raw material fineness control 6.

As a technical optimization scheme of the invention, the system air volume control 7 is respectively electrically connected with the first fan 23, the high-temperature high-pressure fan 25 and the second fan 28.

In this embodiment: the air consumption of the first fan 23, the high-temperature high-pressure fan 25 and the second fan 28 can be conveniently and respectively controlled by setting the system air quantity control 7, which is beneficial to the use of the system.

As a technical optimization scheme of the invention, the calcium oxide finished product detection device 9 is electrically connected with the storage device 27.

In this embodiment: the quality of the calcium oxide finished product inside the storage device 27 is conveniently detected by the calcium oxide finished product detection 9.

As a technical optimization of the present invention, the temperature control 10 of the preheater is electrically connected to the prechamber 26.

In this embodiment: the preheating of the fuel inside the device is facilitated by the electrical connection of the temperature control 10 of the preheater to the prechamber 26.

The working principle and the using process of the invention are as follows: firstly, the feeding amount of a feeding belt scale is automatically adjusted according to the current of a mill main motor and the pressure difference between the mill inlet and the mill outlet by the automatic adjustment 4 of the state of a grinding device, the stability of the device is maintained, the mill air temperature control 5 automatically adjusts and controls the mill inlet and outlet temperature within a normal required range by a mill inlet hot air valve and a mill outlet cold air valve under the condition of setting the output power of an exhaust fan to be constant, the fineness of the raw material is controlled 6 to obtain a rough rule after counting for a plurality of times according to the fineness of the fed raw material of the previous batch and the fineness of the produced calcium oxide product, thereby setting a more reasonable fineness requirement, the total air quantity entering the system and the temperature and humidity of the outside air are monitored by the system air quantity control 7, meanwhile, the air quantity used by the first fan 23 is automatically adjusted according to the cooling temperature of the calcium oxide and the pressure in a decomposing furnace, and the exhaust amount of the high-temperature high-pressure fan 25 is automatically adjusted according to the outlet temperature of the pre-combustion chamber 26, the fuel adjustment 8 in the decomposing furnace automatically adjusts the fuel quantity (coal quantity and gas quantity) of the rotor scale according to the temperature in the decomposing furnace, the temperature in the two decomposing furnaces is controlled, the calcium oxide finished product detection 9 is analyzed according to the data accumulation of a calcium oxide on-line quality analyzer, namely, the purity and fineness of the finished product calcium oxide are analyzed, the temperature control 10 of the preheater controls the pre-combustion chamber 26 to firstly combust one part of the fuel (coal powder or gas), the rest fuel is heated to a certain temperature to achieve the preheating purpose, and finally, the system air quantity control 7 controls the second fan 28 to convey the waste gas and the powder generated by the device to the powder filtering and collecting device 29 for filtering and collecting, and then the waste gas and the powder are conveyed to the inside of the waste gas treatment device 30 to be treated and then are discharged from a chimney 31.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.