阅读说明：本技术 一种烧结混合料的智能控水方法 (Intelligent water control method for sintering mixture ) 是由 石永敬 李沁兰 尚凤杰 于 2021-07-02 设计创作，主要内容包括：本发明公开了一种烧结混合料的智能控水方法,提高对烧结矿的质量与产量。包括：S1：设定一混及二混物料的含水量目标值；S2：测得一混机进料端的物料的质量及含水量数据；S3：计算机计算出一混加水量；S4：计算机控制加水系统对一混混合料进行加水；S5：测得二混机进料端的物料的质量及含水量数据；S6：计算机对S3中的加水量进行修正,并进入S4；S7：计算机计算出二混加水量；S8：计算机控制加水系统对二混混合料进行加水；S9：测水系统获取烧结台车进料端的物料的质量、含水量；S10：计算机对S7中的加水量进行修正,将结果发送至加水系统,并进入S8。(The invention discloses an intelligent water control method for a sintering mixture, which improves the quality and the yield of sintered ores. The method comprises the following steps: s1: setting target values of water contents of the first mixed material and the second mixed material; s2: measuring the mass and water content data of the material at the feeding end of the mixer; s3: calculating a mixed water adding amount by a computer; s4: controlling a water adding system by a computer to add water into a mixed material; s5: measuring the mass and water content data of the material at the feeding end of the two-mixer; s6: the computer corrects the water adding amount in S3 and enters S4; s7: calculating the water adding amount of the second mixture by the computer; s8: controlling a water adding system by the computer to add water to the second mixed material; s9: the water measuring system acquires the quality and the water content of the material at the feeding end of the sintering trolley; s10: the computer corrects the amount of water added in S7, sends the result to the water addition system, and proceeds to S8.)

1. An intelligent water control method for a sinter mixture, a device for preparing the sinter mixture, is characterized by comprising the following steps:

s1: setting target values of water contents of the first mixed material and the second mixed material according to process requirements;

s2: the water measuring system measures the mass and water content data of the material at the feeding end of the mixer and sends the result to the computer;

s3: the computer calculates a mixed water adding amount according to a formula (1a) or a formula (1b) according to the received data and a mixed water content target value, and sends the result to the water adding system;

water addition amount of mixture

A mixed water addition quantity Q₁＝ω_1，0m₁-ω₁m₁+αm_CaO (1b)

S4: controlling a water adding system by a computer to add water into a mixed material;

s5: the water measuring system measures the mass and water content data of the material at the feeding end of the two-mixer and sends the result to the computer;

s6: the computer corrects the water adding amount in the S3 according to the formula (2), sends the result to the water adding system and enters S4;

water adding amount mixed correction Q'₁＝ω_1，0m_s1-ω_s1m_s1+Q₁ (2)

S7: the computer calculates the secondary mixing water addition amount according to a formula (3) according to the quality and water content data of the material at the feeding end of the secondary mixing machine and a secondary mixing water content target value, and sends the result to the water addition system;

two mixed water addition quantity Q₂＝ω_2，0m_s1-ω_s1m_s1 (3)

S8: controlling a water adding system by the computer to add water to the second mixed material;

s9: the water measuring system acquires the quality and the water content of the material at the feeding end of the sintering trolley and sends the result to the computer;

s10: the computer corrects the water adding amount in the S7 according to the formula (4), sends the result to the water adding system and enters S8;

correcting Q 'by two mixed water adding amounts'₂＝ω_2，0m_s2-ω_s2m_s2+Q₂ (4)

In the formula: omega_1，0Is a mixture of water with meshesStandard value,%; omega_2，0The target value of the water content of the second mixture is%; omega_iThe water content of the material on the ith material conveying belt is percent; m is_iThe mass flow of the material on the ith material conveying belt is Kg/h; alpha is the activity coefficient of CaO; m is_CaOThe mass flow of CaO in the material is Kg/h; m is₁The mass flow before the mixing is Kg/h; omega₁Actual water content of the material before mixing, which is detected by an online microwave water detector,%; omega_s1The actual water content of the mixture is detected by an online microwave water detector in percent; m is_s1The mass flow of the material on the mixed material belt is Kg/h; omega_s2The actual water content of the secondary mixture detected by an online microwave water detector is percent; m is_s2The mass flow of the material on the secondary mixing discharge belt is Kg/h; i is an integer of 1 or more.

2. The intelligent water control method for the sinter mix as claimed in claim 1, further comprising S11: the amount of water added in S7 is adjusted according to the data in the gas hygrometer in the flue, the result is sent to the water adding system, and the process goes to S8.

3. The intelligent water control method for the sinter mix as claimed in claim 2, wherein if the gas hygrometer index in the flue pipe is less than 45%, it indicates that the flue gas is too dry, and the amount of the second mix water is required to be added; if the gas hygrometer index in the flue pipe is within the range of 45-80%, the corrected secondary mixing water addition amount is appropriate and does not need to be adjusted; if the index of the gas hygrometer in the flue pipe is more than 80%, the flue gas is over-wet, and the amount of the two-mixed water needs to be reduced.

4. The intelligent water control method for the sinter mix as claimed in claim 3, wherein in step S11, the calculation model based on the second mix water addition amount of the gas hygrometer is:

ΔQ＝k(H₀-H)m_s2(1-ω_s2) (5)

in the formula: delta Q is the amount of the two mixed water to be adjusted, Kg/h, and Delta Q is positiveIf so, indicating that the water addition amount of the second mixture needs to be increased; when the delta Q is negative, the water addition amount of the second mixture is required to be reduced; k is a correction factor, H₀Is the target range of the index of the gas hygrometer in the flue,%; h is measured value of gas hygrometer in flue duct,%.

5. The intelligent water control method for the sinter mix as claimed in claim 4, wherein the correction factor is 0.02.

6. The intelligent water control method for the sintering mixture according to claim 1, wherein the device for sintering the mixture comprises a proportioning bin and a proportioning belt, and a mixing feeding belt, a mixing machine, a mixing discharging belt and a sintering trolley are sequentially arranged at the downstream end of the proportioning belt;

the water adding system is used for adding water to the first mixing machine and the second mixing machine, the computer is used for setting a target value of the water content, and controlling the water adding amount of the water adding system according to a difference value between a measurement result of the water measuring system and the target value of the water content;

the water measuring system comprises online microwave water measuring instruments respectively arranged at a feeding end of the first mixing machine, a feeding end of the second mixing machine and a feeding end of the sintering trolley, and electronic belt weighers respectively arranged on belts at the feeding end of the first mixing machine, the feeding end of the second mixing machine and the feeding end of the sintering trolley;

the water measuring system also comprises a gas hygrometer arranged in a flue of the sintering trolley, and the computer further corrects the water adding amount of the secondary mixing according to the measuring result of the gas hygrometer so that the water content of the sintering mixture is finally and stably controlled within a set target value range;

still including batching main belt, the quantity of batching storehouse, batching belt is a plurality of, batching main belt is located batching belt, one and is thoughtlessly between the feeding belt for the material with each batching belt output is inputed one and is thoughtlessly fed the belt together.

7. The intelligent water control method for the sinter mix as claimed in claim 6, wherein:

the online microwave water measuring instruments are respectively arranged above the ingredient belts, above the first mixed discharging belt and the second mixed discharging belt, the electronic belt weighers are respectively arranged below the ingredient belts, below the first mixed discharging belt and the second mixed discharging belt, and in the step S3, the computer calculates a mixed water adding amount according to a formula (1 a);

or, the online microwave water measuring instrument is respectively installed above a mixed feeding belt, a mixed discharging belt and two mixed discharging belts, the electronic belt scale is respectively installed below each ingredient belt, below a mixed discharging belt and below two mixed discharging belts, and the step S3: the computer calculates a mixed water addition amount according to the formula (1 b).

Technical Field

The invention belongs to the technical field of monitoring of moisture of sintered ore mixtures in ferrous metallurgy, and relates to an intelligent water control method for sintered mixtures.

Background

The iron and steel industry is a prop industry of national economy, and blast furnace iron making is a key component of the iron and steel industry. In the metal smelting process, the sintering production process is a front-stage process of blast furnace iron making and provides raw materials for blast furnace iron making. The sintering process is an important step in powder metallurgy and comprises the components of proportioning, mixing, sintering, crushing, cooling and sieving systems, and is shown in figure 1. It plays a decisive role in the performance of the product. Sintering is a heat treatment of solid powders/particles to improve the quality of the ore, its strength and its degree of densification. Iron ore powder, coal powder, flux and the like are mixed with water, granulated and then placed on a sintering trolley to be ignited and combusted, so that sintered ore required by blast furnace ironmaking is obtained.

The quality of the sintered finished product is closely related to the air permeability of the sintered mixture, and an important process parameter influencing the granulation of the mixture and the air permeability of the material layer is the moisture content of the mixture. Therefore, the moisture content has direct influence on the quality, yield and the like of the sintered finished product, and has the greatest influence on the whole sintering production process. Firstly, the water addition amount of the sintering mixture plays a crucial role in slaking quicklime, granulating and the like; secondly, in the sintering process, the air permeability of the raw materials is determined by the moisture content, the vertical combustion speed is directly influenced, the energy consumption is increased, the phenomena of face burning and non-penetration can occur when the moisture content is low, and the phenomena of excessive dissolution and scaly trolley adhesion can occur when the moisture content is large; thirdly, the fluctuation of the moisture content can directly affect the strength and the yield of the sintered finished ore. In the sintering process, the water content not only affects the sintering quality, but also affects the production efficiency, so that water is one of important factors affecting the sintering in the steel industry. The proper water content is the basic conditions of uniform mixing of raw materials, good granulation effect and good air permeability, so that the actual water content condition of the mixture needs to be mastered in real time, and the additional water adding amount, the combustion time and the temperature are adjusted according to the actual water content condition, so that the water content of the mixture is maintained in a stable range in the production process of the sintering process.

At present, the raw material situation of most domestic iron and steel enterprises is that iron ores are various in types and large in component fluctuation, the suitable water content of a mixture is large in fluctuation, the water distribution amount in the manual water adding process is difficult to ensure the precision, and great difficulty is brought to the sintering process. And the change of climate can cause the moisture of the raw materials to change greatly. However, in actual production, the water distribution of the sintering mixture is often fixed, the change of the water distribution is lagged behind the change of raw materials, and once obvious quality problems occur in the sintering process, the adjustment of process parameters such as water addition amount and the like is possible. The post workers lack effective assessment of the behavior change of the mixed water adding amount caused by the change of the raw materials. The above-mentioned factors make it difficult to stably control the moisture content of the sinter mix at an appropriate value.

Disclosure of Invention

Aiming at the technical problem of water control in sintering in the prior art, the invention aims to provide an intelligent water control method for a sintering mixture.

In order to achieve the purpose, the invention provides the following technical scheme:

an intelligent water control method for a sinter mixture, a device for preparing the sinter mixture, comprises the following steps:

s1: setting target values of water contents of the first mixed material and the second mixed material according to process requirements;

s2: the water measuring system measures the mass and water content data of the material at the feeding end of the mixer and sends the result to the computer;

s3: the computer calculates a mixed water adding amount according to a formula (1a) or a formula (1b) according to the received data and a mixed water content target value, and sends the result to the water adding system;

water addition amount of mixture

A mixed water addition quantity Q₁＝ω_1,0m₁-ω₁m₁+αm_CaO (1b)

S4: controlling a water adding system by a computer to add water into a mixed material;

s5: the water measuring system measures the mass and water content data of the material at the feeding end of the two-mixer and sends the result to the computer;

s6: the computer corrects the water adding amount in the S3 according to the formula (2), sends the result to the water adding system and enters S4;

water adding amount mixed correction Q'₁＝ω_1,0m_s1-ω_s1m_s1+Q₁ (2)

S7: the computer calculates the secondary mixing water addition amount according to a formula (3) according to the quality and water content data of the material at the feeding end of the secondary mixing machine and a secondary mixing water content target value, and sends the result to the water addition system;

two mixed water addition quantity Q₂＝ω_2,0m_s1-ω_s1m_s1 (3)

S8: controlling a water adding system by the computer to add water to the second mixed material;

s9: the water measuring system acquires the quality and the water content of the material at the feeding end of the sintering trolley and sends the result to the computer;

s10: the computer corrects the water adding amount in the S7 according to the formula (4), sends the result to the water adding system and enters S8;

correcting Q 'by two mixed water adding amounts'₂＝ω_2,0m_s2-ω_s2m_s2+Q₂ (4)

In the formula: omega_1,0Is a target value of water content,%; omega_2,0The target value of the water content of the second mixture is%; omega_iThe water content of the material on the ith material conveying belt is percent; m is_iThe mass flow of the material on the ith material conveying belt is Kg/h; alpha is the activity coefficient of CaO; m is_CaOThe mass flow of CaO in the material is Kg/h; m is₁The mass flow before the mixing is Kg/h; omega₁Actual water content of the material before mixing, which is detected by an online microwave water detector,%; omega_s1The actual water content of the mixture is detected by an online microwave water detector in percent; m is_s1The mass flow of the material on the mixed material belt is Kg/h; omega_s2The actual water content of the secondary mixture detected by an online microwave water detector is percent; m is_s2The mass flow of the material on the secondary mixing discharge belt is Kg/h; i is an integer of 1 or more.

Preferably, it further comprises S11: the amount of water added in S7 is adjusted according to the data in the gas hygrometer in the flue, the result is sent to the water adding system, and the process goes to S8.

Preferably, if the index of the gas hygrometer in the flue pipe is less than 45%, indicating that the flue gas is over-dried, adding two mixed water additions; if the gas hygrometer index in the flue pipe is within the range of 45-80%, the corrected secondary mixing water addition amount is appropriate and does not need to be adjusted; if the index of the gas hygrometer in the flue pipe is more than 80%, the flue gas is over-wet, and the amount of the two-mixed water needs to be reduced.

Preferably, in step S11, the calculation model based on the second mixed water addition amount of the gas hygrometer regulator is:

ΔQ＝k(H₀-H)m_s2(1-ω_s2) (5)

in the formula: if delta Q is the two-stage mixed water amount to be adjusted, Kg/h and delta Q is positive, the two-stage mixed water amount needs to be increased; when the delta Q is negative, the water addition amount of the second mixture is required to be reduced; k is a correction factor, H₀Is the target range of the index of the gas hygrometer in the flue,%; h is measured value of gas hygrometer in flue duct,%.

Preferably, the correction coefficient takes 0.02.

Preferably, the device for sintering the mixture comprises a proportioning bin and a proportioning belt, wherein a mixing feeding belt, a mixing machine, a mixing discharging belt and a sintering trolley are sequentially arranged at the downstream end of the proportioning belt;

the water adding system is used for adding water to the first mixing machine and the second mixing machine, the computer is used for setting a target value of the water content, and controlling the water adding amount of the water adding system according to a difference value between a measurement result of the water measuring system and the target value of the water content;

the water measuring system comprises online microwave water measuring instruments respectively arranged at a feeding end of the first mixing machine, a feeding end of the second mixing machine and a feeding end of the sintering trolley, and electronic belt weighers respectively arranged on belts at the feeding end of the first mixing machine, the feeding end of the second mixing machine and the feeding end of the sintering trolley;

the water measuring system also comprises a gas hygrometer arranged in a flue of the sintering trolley, and the computer further corrects the water adding amount of the secondary mixing according to the measuring result of the gas hygrometer so that the water content of the sintering mixture is finally and stably controlled within a set target value range;

still including batching main belt, the quantity of batching storehouse, batching belt is a plurality of, batching main belt is located batching belt, one and is thoughtlessly between the feeding belt for the material with each batching belt output is inputed one and is thoughtlessly fed the belt together.

Preferably, the on-line microwave water measuring instruments are respectively installed above the ingredient belts, above the first mixed discharging belt and above the second mixed discharging belt, the electronic belt scale is respectively installed below the ingredient belts, below the first mixed discharging belt and below the second mixed discharging belt, and in the step S3, the computer calculates a mixed water addition amount according to the formula (1 a);

or, the online microwave water measuring instrument is respectively installed above a mixed feeding belt, a mixed discharging belt and two mixed discharging belts, the electronic belt scale is respectively installed below each ingredient belt, below a mixed discharging belt and below two mixed discharging belts, and the step S3: the computer calculates a mixed water addition amount according to the formula (1 b).

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

1. the invention effectively overcomes the defect that the precision of manually controlled water distribution is difficult to ensure, realizes the automatic control of water addition in the mixing process, and reduces the labor intensity of post work;

2. the method has the advantages of stabilizing the water content in the sintering mixture, reducing the fluctuation of water, improving the influence of objective factors such as climate, air humidity and the like on the water adding amount, effectively improving the air permeability of a sintering material layer, improving the sintering quality and the production efficiency and reducing the energy consumption.

Drawings

Fig. 1 is a schematic structural diagram of a water measuring system according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of another water measuring system according to an embodiment of the present invention;

FIG. 3 is a schematic view of a water addition system of the present invention;

in the attached drawings, 1, a proportioning bin; 2. an online microwave water meter; 3. a batching belt; 4. an electronic belt scale; 5. a main belt for burdening; 6. a mixed feed belt; 7. a mixer; 8. a mixed material discharging belt; 9. a second mixing machine; 25. a secondary mixing discharge belt; 10. sintering the trolley; 11. a flue gas duct; 12. a gas hygrometer; 13. a crushing system; 14. a cooling system; 15. a screening system; 16. a blast furnace; 17. returning ores;

18. a water tank; 19. a manual valve; 20. an electromagnetic cut-off valve; 21. a variable frequency centrifugal pump; 22. an electromagnetic flow meter; 23. a pressure sensor; 24. intelligent proportional control valve.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described below with reference to the accompanying drawings and examples, and the exemplary embodiments and descriptions thereof are only used for supporting the present invention and are not intended to limit the present invention.

Example one

The present example provides an intelligence accuse water system for sinter mixture, includes water measuring system and water charging system. The water measuring system is shown in attached figure 1 and comprises an online microwave water measuring instrument 2, an electronic belt scale 4 and a gas hygrometer 12. The online microwave water measuring instrument 2 is respectively arranged above each material distribution belt, the first mixed discharging belt 8 and the second mixed discharging belt 25. The electronic belt weighers 4 are respectively arranged below the ingredient belts, the first mixed discharging belt 8 and the second mixed discharging belt 25. The gas hygrometer 12 is mounted in the flue gas duct 11. The water adding system is shown in figure 3, and comprises a water tank 18, a manual valve 19, an electromagnetic cut-off valve 20, a variable frequency centrifugal pump 21, an electromagnetic flowmeter 22, a pressure sensor 23 and a proportion intelligent regulating valve 24, and is connected with a PLC control system in series.

In this embodiment, the target values ω of the water content of the first and second mixtures are preset in the computer_1,0And omega_2,0(ii) a The water content omega of the materials in each batching belt is measured by an on-line microwave water meter 2_iThe corresponding material mass m is measured by the electronic belt scale 4_iAnd sending the detection result to the computer; the processor in the computer presses the dataCalculating a mixed water adding amount by the water calculating model; the calculation result is sent to a water adding system, and the water adding system receives the water adding amount signal and then controls a starting valve to add water to a mixer through a PLC; an online microwave water meter 2 arranged on a mixed material discharging belt measures the actual water content omega of a mixed material_s1The electronic belt scale 4 arranged at the position of a mixing belt measures the mass m of the mixed material_s1And sending the detection result to the computer; processor in computer presses data by Q'₁＝ω_1,0m_s1-ω_s1m_s1+Q₁Correcting the first mixed water addition amount to obtain a corrected water addition amount Q'₁Sending the water to a water adding system; the processor in the computer pushes the data to Q₂＝ω_{2, 0}m_s1-ω_s1m_s1Calculating the secondary mixed water addition amount by the water calculation model; the calculation result is sent to a water adding system, and the water adding system receives the water adding amount signal and then controls a starting valve to add water to the two-stage mixer through a PLC; the actual water content omega of the two-mixed material is measured by an online microwave water meter 2 arranged on the two-mixed discharging belt_s2The mass m of the two mixed materials is measured by an electronic belt scale 4 arranged at the position of the two mixed belts_s2And sending the detection result to the computer; processor in computer presses data by Q'₂＝ω_2,0m_s2-ω_s2m_s2+Q₂Correcting the two mixed water addition amounts to obtain a corrected water addition amount Q'₂And sending the mixture to a water adding system to finish the online accurate water adding work of the mixture.

An online microwave water measuring system as shown in the attached figure 1 is well installed in a production site, an online microwave water measuring instrument 2 is respectively installed on a batching belt 3, a first mixed discharging belt 8 and a second mixed discharging belt 25, and an electronic belt scale 4 is respectively installed below the batching belt 3, below the first mixed discharging belt 8 and below the second mixed discharging belt 25. The watering system was then installed at the feed inlet of the first and second mixers, with the installation of piping as shown in figure 3.

Taking the sintering water adding control process of a certain sintering plant as an example, the measured relevant data are as follows:

target value of water content	Mixed omega1,0	Two mixed omega2,0
			ωi,％	7.00	7.50

Name (R)	Proportioning bin 1	Proportioning bin 2	Proportioning bin 3	Proportioning bin 4	Proportioning bin 5	Proportioning bin 6	Proportioning bin 7	One-mixing discharging belt	Two-mixing discharging belt
										ωi,％	7.02	6.76	6.78	6.45	0.05	0.04	4.73	6.98	7.49
mi，Kg/h	36000	35500	37500	35000	10000	10000	16000	182000	182900

The activity coefficient of CaO was found to be 0.37.

The theoretical water addition calculation process of the first mixing is as follows:

after the PLC control is used for completing the water adding amount of the mixture, the online microwave water meter 2 arranged on the mixed discharging belt measures the mixtureWater content omega_s16.98 percent, and the mass m of a mixed material is measured by an electronic belt scale 4 arranged at the position of a mixed belt_s1182000 Kg/h; adding a mixed water quantity Q according to the actual water content condition₁And performing correction, wherein the correction calculation process is as follows:

Q’₁＝ω_1,0m_s1-ω_s1m_s1+Q₁

＝7/100*182000-6.98/100*182000+9507.2＝9543.6Kg/h

namely, the actual water addition amount for one mixing should be 9543.6 Kg/h.

The theoretical water addition amount calculation process of the second mixing is as follows:

Q₂＝ω_2,0m_s1-ω_s1m_s1＝7.5/100×182000-6.98/100×182000

＝946.4Kg/h

after the two-stage mixing water adding amount is finished through PLC control, the actual water content omega of the two-stage mixing material is measured by an online microwave water meter 2 arranged on the two-stage mixing discharging belt_s27.49 percent, and the mass m of a mixed material is measured by an electronic belt scale 4 arranged at the position of a mixed belt_s2182900 Kg/h; adding a mixed water quantity Q according to the actual water content condition₂And performing correction, wherein the correction calculation process is as follows:

Q’₂＝ω_2,0m_s2-ω_s2m_s2+Q₂

＝7.5/100×182900-7.49/100×182900+946.4＝964.69Kg/h

in the embodiment, the index of a gas hygrometer in the flue pipe is 53%, the humidity control is reasonable, and the two-mixed water addition amount is not modified. Namely, the actual water addition amount of the second mixing is 964.69 Kg/h.

Example two

The present example provides an intelligence accuse water system for sinter mixture, includes water measuring system and water charging system. The water measuring system is shown in attached figure 2 and comprises an online microwave water measuring instrument 2, an electronic belt scale 4 and a gas hygrometer 12. The online microwave water measuring instrument 2 is respectively arranged above the first mixed feeding belt 6, the first mixed discharging belt 8 and the second mixed discharging belt 25. The electronic leatherThe belt weighers 4 are respectively arranged below the ingredient belts, the first mixed discharging belt 8 and the second mixed discharging belt 25. The gas hygrometer 12 is mounted in the flue gas duct 11. The processor in the computer pushes the data to Q₁＝ω_1,0m₁-ω₁m₁+αm_CaOCalculating a mixed water adding amount by the water calculating model; and the calculation result is sent to a water adding system, and the two-mixing calculation process is the same as the first embodiment. The water adding system is shown in figure 3, and comprises a water tank 18, a manual valve 19, an electromagnetic cut-off valve 20, a variable frequency centrifugal pump 21, an electromagnetic flowmeter 22, a pressure sensor 23 and a proportion intelligent regulating valve 24, and is connected with a PLC control system in series.

Taking the sintering water adding control process of a certain sintering plant as an example, the measured relevant data are as follows:

target value of water content	Mixed omega1,0	Two mixed omega2,0
			ωi,％	7.00	7.50

Name (R)	A mixed feeding belt	One-mixing discharging belt	Two-mixing discharging belt
				ωi,％	4.73	7.02	7.51
mi，Kg/h	120000	123000	123600

The mass flow of CaO in the mixture is 18000Kg/h, and the activity coefficient of the CaO is 0.36.

The theoretical water addition calculation process of the first mixing is as follows:

after the PLC control is used for completing the water adding amount of the mixture, the online microwave water meter 2 arranged on the mixed discharging belt measures the actual water content omega of the mixed material_s17.02 percent, and the mass m of a mixed material is measured by an electronic belt scale 4 arranged at the position of a mixed belt_s1123000 Kg/h; adding a mixed water quantity Q according to the actual water content condition₁And performing correction, wherein the correction calculation process is as follows:

Q’₁＝ω_1,0m_s1-ω_s1m_s1+Q₁＝7/100×123000-7.02/100×123000+9204

＝9179.4Kg/h

namely, the actual water addition amount for one mixing should be 9179.4 Kg/h.

The theoretical water addition amount calculation process of the second mixing is as follows:

Q₂＝ω_2,0m_s1-ω_s1m_s1＝7.5/100×123000-7.02/100×123000

＝590.4Kg/h

after the two-stage mixing water adding amount is finished through PLC control, the actual water content omega of the two-stage mixing material is measured by an online microwave water meter 2 arranged on the two-stage mixing discharging belt_s27.51 percent, and the mass m of a mixed material is measured by an electronic belt scale 4 arranged at the position of a mixed belt_s2123600 Kg/h; adding a mixed water quantity Q according to the actual water content condition₂And performing correction, wherein the correction calculation process is as follows:

Q’₂＝ω_2,0m_s2-ω_s2m_s2+Q₂

＝7.50/100×123600-7.51/100×123600+590.4

＝578.04Kg/h

in this embodiment, the gas humidity index in the flue pipe is 70%, the humidity is too high, and the corrected two-mixed water addition amount needs to be adjusted according to the calculation model (5), that is, Δ Q ═ k (H)₀-H)m_s2(1-ω_s2)＝0.01×[(70％-60％)/100]×123600×[(1-7.51％)/100]＝-8.04Kg/h

And adjusting the water adding amount of the second mixture, wherein the actual water adding amount Q of the second mixture is 578.04-8.04-570 Kg/h.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make various changes and modifications without departing from the structure of the present invention, and these should be considered as the protection scope of the present invention, which will not affect the effect and practicality of the implementation of the present invention.