Annular double-hearth kiln gas regulation and control system and method

Abstract

The invention belongs to the technical field of fuel gas regulation and control, and relates to an annular double-chamber kiln fuel gas regulation and control system and method.The regulation and control method comprises the steps that S1, the following data of an annular double-chamber kiln are obtained, wherein the data include the daily output set value, the fuel gas flow theoretical value, the fuel gas heat value, the lime output set value and the inner and outer ring fuel gas percentage set value; calculating a gas theoretical value of a gas branch pipe where an inner ring gas electric control valve and an outer ring gas electric control valve of each annular double-chamber kiln are located; s2, calculating a deviation value according to the theoretical gas value and the collected gas measurement value; s3, on the basis of the deviation value, the opening degree adjusting proportion of the gas electric adjusting valve is calculated through a proportion band; and S4, gas regulation and control of the annular double-hearth kiln are completed according to the calculation result of the previous step. According to the regulation and control method provided by the invention, the real-time performance and accuracy of gas regulation and control in the annular double-chamber kiln can be realized, and the stable operation of the annular double-chamber kiln is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of gas control and regulation, and relates to a gas control and regulation system and method for an annular double-chamber kiln. Background Art

[0002] The kiln body of the annular double-chamber kiln is divided into chamber A (semi-annular kiln chamber) and chamber B (semi-annular kiln chamber). Chamber A and chamber B are divided into inner ring and outer ring. The inner ring is equipped with 13 gas handle valves, and the outer ring is equipped with 19 gas handle valves, totaling 32 (single chamber) × 2 = 64 (gas handle valves of an annular double-chamber kiln). In the process of calcining limestone in the annular double-chamber kiln, according to the calorific value of calcium carbide tail gas, the temperature in the annular double-chamber kiln is controlled by adjusting the size of the gas volume and the air distribution volume to complete the calcination of limestone. Therefore, regulating the opening of the gas regulating valve is an important means to control the temperature of the inner and outer rings of lime during the lime calcination process, and it is also an important means to ensure that the lime is calcined to a qualified level.

[0003] At present, the opening of the gas regulating valve is achieved by adjusting the spray gun on the gas regulating valve. The specific process of spray gun adjustment is: notify the on-site personnel through the central control room, and the on-site personnel run from the bottom of the annular double-chamber kiln to 35 meters of the annular double-chamber kiln to manually adjust the opening of the gas regulating valve (also known as the gas handle valve) to control the gas intake. Although the existing adjustment method can achieve the regulation of gas, it has the following problems:

[0004] (1) It takes a long time for the staff to run 35 meters to the circular double-chamber kiln after receiving the notification, which makes the gas control have a certain time lag. The gas control is not timely, which affects the operation stability of the circular double-chamber kiln;

[0005] (2) Currently, the opening of the on-site gas regulating valve is adjusted manually, which has unstable factors and causes the accuracy of gas quantity control to deteriorate.

[0006] In summary, the existing gas control has technical problems of hysteresis and poor accuracy of gas quantity control, which affects the operating stability of the annular double-chamber kiln, and further affects the calcination efficiency of lime and the qualified rate of the produced lime products. Summary of the invention

[0007] In view of the technical problems that the existing gas regulation of annular double-chamber kilns has hysteresis and poor accuracy of gas input, the present invention provides a gas regulation system and method for annular double-chamber kilns.

[0008] The present invention calculates the deviation value through the gas theoretical value and the gas measurement value, and then calculates the valve opening adjustment ratio of each gas electric regulating valve through the proportional band, so as to realize the real-time and accuracy of gas regulation in the annular double-chamber kiln and ensure the stable operation of the annular double-chamber kiln.

[0009] In order to achieve the above object, the technical solution adopted by the present invention is:

[0010] A method for regulating and controlling gas in an annular double-chamber kiln comprises the following steps:

[0011] S1. Obtain the following data of the annular double-chamber kiln: daily output setting value D, gas flow theoretical value L, gas calorific value Q, lime output setting value M, and inner and outer ring gas percentage setting value K, and calculate the gas theoretical value of the gas branch pipe where the inner and outer ring gas electric regulating valves of each annular double-chamber kiln are located;

[0012] S2. Compare the calculated theoretical gas value of the gas branch pipe where the gas electric regulating valve on the inner and outer rings of the annular double-chamber kiln is located with the actual gas measurement value of the gas branch pipe, and calculate the deviation value e i :

[0013] e i =b i -c i ;

[0014] Where: e i is the deviation value of the gas branch where the i-th gas electric regulating valve is located; b i is the theoretical value of the gas in the gas branch where the i-th gas electric regulating valve is located; c i is the gas measurement value of the gas branch where the i-th gas electric regulating valve is located; i is the number of gas electric regulating valves;

[0015] S3, based on the deviation value of step S2, the opening adjustment ratio U of the gas electric regulating valve is calculated using the proportional band i ;

[0016] U i =Kp×e i

[0017] Among them: U i is the opening adjustment ratio of the ith gas electric regulating valve, Kp is the proportional band gain, and is a set constant;

[0018] S4. According to the opening adjustment ratio of the gas electric regulating valve calculated in step S3, the opening of the gas electric regulating valve is adjusted to complete the gas control in the annular double-chamber kiln.

[0019] It is further defined that in step S1, the specific method for calculating the theoretical value of the gas in the gas branch where the inner and outer ring gas electric regulating valves of each annular double-chamber kiln are located is:

[0020] S11. Calculate the theoretical output A of the annular double-chamber kiln per hour based on the daily output setting value D:

[0021] A=D×1000kg÷24h

[0022] S12. Calculate the total gas consumption per hour of the annular double-chamber kiln P

[0023] P=F÷Q×A

[0024] Among them: F is the heat consumption rate; Q is the calorific value of gas;

[0025] S13. Calculate the gas consumption N of the inner and outer rings of the annular double-chamber kiln

[0026] N=P×K

[0027] Where: K is the set value of the inner and outer ring gas percentage;

[0028] S14. Calculate the consumption of gas branch pipes where each gas electric regulating valve is located in the inner and outer rings of the annular double-chamber kiln B

[0029] B=N÷H

[0030] H is the total number of gas branch pipes on the inner and outer rings of the annular double-chamber kiln;

[0031] S15. Calculate the theoretical value b of the gas in the gas branch where the inner and outer ring gas electric regulating valves of each annular double-chamber kiln are located. i

[0032] b i =B×η

[0033] Where: η is the adjustment coefficient, which can take any value between 0 and 1.

[0034] It is further defined that in step S12, the heat rate F is calculated using the following formula:

[0035] F=(Q×L) / M

[0036] Where: L is the theoretical value of gas flow, M is the set value of lime production, and Q is the calorific value of gas.

[0037] It is further defined that in step S14, the total number of gas branch pipes on the inner and outer rings of the annular double-chamber kiln is 64.

[0038] It is further defined that in step S3, the value of Kp is 100-300.

[0039] It is further defined that the annular double-chamber kiln gas control method also includes:

[0040] After the gas control in the annular double-chamber kiln is completed in step S4, it is also necessary to collect the combustion temperature in the annular double-chamber kiln in real time, and compare the collected combustion temperature in the annular double-chamber kiln with the combustion temperature setting value in the annular double-chamber kiln. When the collected combustion temperature in the annular double-chamber kiln is not within the range of the combustion temperature setting value in the annular double-chamber kiln, step S5 is further executed.

[0041] The combustion temperature setting value in the annular double-chamber kiln is 1000°C to 1200°C;

[0042] S5. Calculate the opening adjustment ratio V of the gas electric regulating valve through the proportional band and integral i :

[0043] V i =Kp×ei+Ki×eidt

[0044] Where: V i is the opening adjustment ratio of the i-th gas electric regulating valve, Kp is the proportional band gain, which is a set constant; Ki is the integral gain, unit: s, which is a set constant; dt is the integral symbol; e i is the deviation value;

[0045] S6. According to the above calculation, the opening adjustment ratio V of each gas electric regulating valve i , adjust the opening of each gas electric regulating valve.

[0046] It is further defined that the value of Ki is 10s to 30s.

[0047] It is further defined that in step S2, the gas measurement value of the gas branch pipe is collected by a flow meter.

[0048] A control system for realizing the annular double-chamber kiln gas control method, the control system comprising:

[0049] Data acquisition module: used to obtain the daily output set value D, gas flow theoretical value L, gas calorific value Q, lime output set value M, inner and outer ring gas percentage set value K, set value in the annular double-chamber kiln, gas measurement value of the collected gas branch pipe, and combustion temperature in the collected annular double-chamber kiln;

[0050] Data calculation module: used to calculate the gas theoretical value and deviation value of the gas branch where the inner and outer ring gas electric regulating valves of each annular double-chamber kiln are located according to the data obtained by the data acquisition module, and pass the calculation results to the data analysis module;

[0051] Data analysis module: used to calculate the opening adjustment ratio U of the gas electric regulating valve using the proportional band according to the deviation value calculated by the data calculation module iand pass the calculation results to the control module; used to compare the combustion temperature in the annular double-chamber kiln collected in real time with the combustion temperature set value; used to recalculate the opening adjustment ratio V of the gas electric regulating valve through the proportional band and integral according to the deviation value calculated by the data calculation module i , and pass the calculation results to the control module;

[0052] Control module: used to adjust the opening of the gas electric regulating valve of the annular double-chamber kiln according to the calculation results transmitted by the data analysis module.

[0053] It is further defined that the control system also includes a flow meter and a thermometer, the flow meter is used to collect the gas measurement value of the gas branch pipe; the thermometer is used to collect the combustion temperature in the annular double-chamber kiln.

[0054] Compared with the prior art, the present invention has the following beneficial effects:

[0055] 1. The present invention collects gas data (gas calorific value) and parameter values ​​set during the operation of the annular double-chamber kiln (daily output set value, gas flow theoretical value, lime output set value and inner and outer ring gas percentage set value), calculates the deviation between the gas theoretical value and the real-time collected gas measurement value, and then calculates the opening adjustment ratio of each gas electric regulating valve through the proportional band, thereby automatically adjusting the precise opening of the gas electric regulating valve, realizing the real-time and accuracy of gas regulation in the annular double-chamber kiln, and ensuring the stable operation of the annular double-chamber kiln.

[0056] 2. The present invention calculates the theoretical value of gas through the daily output set value, the theoretical value of gas flow, the gas calorific value, the lime output set value, the inner and outer ring gas percentage set value and the adjustment coefficient, fully considering the performance of the gas itself and the requirements of the annular double-chamber kiln product on the gas flow, improving the accuracy of the control results, stabilizing the operation, and improving the calcination efficiency of the lime and the qualified rate of the produced lime products.

[0057] 3. The present invention calculates the opening adjustment ratio of each gas-fired electric regulating valve by a proportional band, and calculates the opening adjustment ratio of each gas-fired electric regulating valve by combining a proportional band and an integral. Both methods can ensure that the combustion temperature in the annular double-chamber kiln is within 1000°C to 1200°C. Not only is the regulation more accurate, but the operation of the annular double-chamber kiln is more stable, thereby improving the calcination efficiency of lime and the qualified rate of the produced lime products.

[0058] 4. The present invention provides a control system that integrates various functional modules to achieve automatic and precise control of the opening of the gas electric valve, meeting the actual needs of stable operation of the annular double-chamber kiln. DETAILED DESCRIPTION

[0059] The preferred embodiments of the present invention are described in detail below so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0060] Unless otherwise defined, technical or scientific terms used in the present invention shall have the common meanings understood by one having ordinary skills in the field to which the present invention belongs.

[0061] Technologies, methods, and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0062] The present invention calculates the required gas flow value of each gas branch pipe of the inner and outer rings of the annular double-bore kiln through parameters such as the daily output of the annular double-bore kiln, the calorific value of the gas, the percentage of the inner and outer rings gas, and the adjustment coefficient, and takes the required gas flow value as a set value to compare with the actual value, and sets it in the set value of the annular double-bore kiln electric coal gas regulating valve PID function block SP, takes the actual coal gas flow as the process measurement value PV electric coal gas regulating valve PID function block, and then puts the gas electric regulating valve into automatic mode, and automatically controls the precise opening of the coal gas electric valve by adjusting the PID proportional band and integral, and further controls the accuracy of the coal gas input in the annular double-bore kiln, so as to improve the efficiency of lime calcination and the qualified rate of the produced lime products.

[0063] Example 1

[0064] This embodiment provides a method for controlling gas in an annular double-chamber kiln, comprising the following steps:

[0065] S1. Obtain the following data of the annular double-chamber kiln: daily output setting value D, gas flow theoretical value L, gas calorific value Q, lime output setting value M and inner and outer ring gas percentage setting value K, and calculate the gas theoretical value of the gas branch where the inner and outer ring gas electric regulating valves of each annular double-chamber kiln are located.

[0066] In this step, the specific method for calculating the theoretical value of the gas in the gas branch pipe where the inner and outer ring gas electric regulating valves of each annular double-chamber kiln are located is:

[0067] (1) Calculate the theoretical hourly output A of the annular double-chamber kiln based on the daily output setting value D:

[0068] A=D×1000kg÷24h

[0069] In this step, the daily output setting value D is in tons / day, and the theoretical hourly output A of the annular double-chamber kiln is kg / h.

[0070] In this embodiment, the daily output setting value refers to the theoretical daily output of the annular double-chamber kiln.

[0071] (2) Calculate the total gas consumption per hour of the annular double-chamber kiln P

[0072] P=F÷Q×A

[0073] Among them: F is the heat consumption rate; Q is the calorific value of gas.

[0074] In this step, the calorific value of the gas is obtained by analyzing and testing the gas, and the analysis and testing method is a conventional analysis and testing method already available in the industry.

[0075] In this step, the heat rate F is calculated using the following formula:

[0076] F=(Q×L) / M

[0077] L is the theoretical value of gas flow, M is the set value of lime production, and Q is the calorific value of gas.

[0078] The set value of lime production is the theoretical value of process production after the annular double-chamber kiln is in operation.

[0079] (3) Calculation of gas consumption N of inner and outer rings of annular double-chamber kiln

[0080] N=P×K

[0081] Where: K is the set value of the inner and outer ring gas percentage.

[0082] (4) Calculate the consumption B of the gas branch pipe where each gas electric regulating valve is located in the inner and outer rings of the annular double-chamber kiln

[0083] B=N÷H

[0084] H is the total number of gas branch pipes on the inner and outer rings of the annular double-chamber kiln;

[0085] Preferably, the total number of gas branch pipes on the inner and outer rings of the annular double-chamber kiln is 64. Specifically, chamber A has 13 gas branch pipes on the inner ring, 19 gas branch pipes on the outer ring, and 32 branch pipes on the single chamber. Chamber B has the same branch pipe layout as chamber A, also with 32 branch pipes.

[0086] (5) Calculate the theoretical gas value b of the gas branch pipe where the inner and outer ring gas electric regulating valves of each annular double-chamber kiln are located i

[0087] b i =B×η.

[0088] In this step, the adjustment coefficient is 0 to 1 and can take any value within the range.

[0089] S2. Compare the calculated theoretical gas value of the gas branch pipe where the gas electric regulating valve on the inner and outer rings of the annular double-chamber kiln is located with the actual gas measurement value of the gas branch pipe, and calculate the deviation value ei :

[0090] e i =b i -c i ;

[0091] Where: e i is the deviation value of the gas branch where the i-th gas electric regulating valve is located; b i is the theoretical value of the gas in the gas branch where the i-th gas electric regulating valve is located; c i is the gas measurement value of the gas branch where the i-th gas electric regulating valve is located; i is the number of gas electric regulating valves.

[0092] Preferably, the number of the gas electric regulating valves is also 64.

[0093] S3, based on the deviation value of step S2, the opening adjustment ratio U of the gas electric regulating valve is calculated using the proportional band i ;

[0094] U i =Kp×e i

[0095] Among them: U i is the opening adjustment ratio of the ith gas electric regulating valve, Kp is the proportional band gain, and is a set constant.

[0096] In this embodiment, the value of Kp is 100-300. Within this range, when the value of Kp is larger, the valve opening of the gas electric regulating valve is larger, and thus the reaction in the annular double-chamber kiln is faster.

[0097] Preferably, in this embodiment, the value of Kp is 300.

[0098] Preferably, the opening adjustment ratio U of the gas electric regulating valve obtained by proportional band calculation is i It is less than or equal to 100, which is used as the engineering quantity value of the gas electric regulating valve to adjust the gas electric regulating valve.

[0099] S4. According to the opening adjustment ratio of the gas electric regulating valve calculated in step S3, the opening of the gas electric regulating valve is adjusted to complete the gas control in the annular double-chamber kiln.

[0100] When the gas control method of the annular double-chamber kiln is used to complete the gas control of the annular double-chamber kiln, the gas is adjusted according to the opening ratio U of the gas electric control valve. iThe size of the annular double-bore kiln enters the annular double-bore kiln. At this time, the combustion temperature in the annular double-bore kiln is collected in real time, and the collected combustion temperature in the annular double-bore kiln is compared with the combustion temperature setting value in the annular double-bore kiln. The collected combustion temperature in the annular double-bore kiln is within the range of the combustion temperature setting value (1000℃~1200℃) in the annular double-bore kiln. At this time, it means that the amount of gas in the annular double-bore kiln is appropriate, the combustion in the annular double-bore kiln is stable, and the operation is normal.

[0101] The combustion temperature refers to the temperature of the gas after it burns in the combustion chamber of the annular double-chamber kiln.

[0102] Therefore, the control method of this embodiment can not only realize the real-time control of gas, but also ensure the normal operation of the annular double-chamber kiln, greatly improve the efficiency of lime calcining, and ensure that the output lime finished product is qualified.

[0103] Example 2

[0104] When the annular double-chamber kiln gas control method of Example 1 is used to complete the annular double-chamber kiln gas control. At this time, the gas is adjusted according to the opening ratio U of the gas electric control valve. i The size of the annular double-bore kiln is entered into the annular double-bore kiln, and the combustion temperature in the annular double-bore kiln is collected in real time. The collected combustion temperature in the annular double-bore kiln is compared with the combustion temperature setting value in the annular double-bore kiln. When the collected combustion temperature in the annular double-bore kiln is not within the range of the combustion temperature setting value in the annular double-bore kiln (1000℃~1200℃), that is, the combustion temperature is less than 1000℃, or the combustion temperature is greater than 1200℃, it means that the amount of gas in the annular double-bore kiln is too much or too little, then step S5 is further executed to recalculate the opening of each gas electric regulating valve.

[0105] In this embodiment, the combustion temperature refers to the temperature of the fuel gas after it enters the annular double-chamber kiln and burns in the combustion chamber of the annular double-chamber kiln.

[0106] On the basis of Example 1, the gas control method of the annular double-chamber kiln provided in this embodiment further includes the following steps:

[0107] S5. Calculate the opening adjustment ratio V of the gas electric regulating valve through the proportional band and integral i :

[0108] V i =Kp×ei+Ki×eidt

[0109] Where: V i is the opening adjustment ratio of the i-th gas electric regulating valve, Kp is the proportional band gain, which is a set constant; Ki is the integral gain, unit: s, which is a set constant; dt is the integral symbol; e i is the deviation value.

[0110] According to the above calculation, the opening adjustment ratio V of each gas electric regulating valve i , adjust the opening of each gas electric regulating valve.

[0111] In this step, the value of Ki is 10s to 30s.

[0112] Preferably, in this embodiment, the value of Ki is 30s.

[0113] Preferably, the opening adjustment ratio V of the gas electric regulating valve obtained by proportional band and integral calculation is i It is less than or equal to 100, which is used as the engineering quantity value of the gas electric regulating valve to adjust the gas electric regulating valve.

[0114] In this embodiment, the gas is adjusted according to the opening ratio V of the gas electric regulating valve. i The size of the gas enters the annular double-bore kiln, and the combustion temperature in the annular double-bore kiln is collected in real time. The combustion temperature in the annular double-bore kiln is in the range of 1000℃ ~ 1200℃. At this time, it means that the amount of gas in the annular double-bore kiln is appropriate, the combustion in the annular double-bore kiln is stable, and the operation is normal.

[0115] Therefore, the control method of this embodiment can not only realize the real-time control of gas, but also ensure the normal operation of the annular double-chamber kiln, greatly improve the efficiency of lime calcining, and ensure that the output lime finished product is qualified.

[0116] Example 3

[0117] This embodiment provides a gas control system for an annular double-chamber kiln, which is used to implement the gas control method for annular double-chamber kiln described in Embodiment 1 and Embodiment 2.

[0118] In this embodiment, the control system includes:

[0119] Data acquisition module: used to obtain the daily output set value D, gas flow theoretical value L, gas calorific value Q, lime output set value M, inner and outer ring gas percentage set value K, set value in the annular double-chamber kiln, gas measurement value of the collected gas branch pipe, and combustion temperature in the collected annular double-chamber kiln;

[0120] Data calculation module: used to calculate the gas theoretical value and deviation value of the gas branch where the inner and outer ring gas electric regulating valves of each annular double-chamber kiln are located according to the data obtained by the data acquisition module, and pass the calculation results to the data analysis module;

[0121] Data analysis module: used to calculate the opening adjustment ratio U of the gas electric regulating valve using the proportional band according to the deviation value calculated by the data calculation module iand pass the calculation results to the control module; used to compare the combustion temperature in the annular double-chamber kiln collected in real time with the combustion temperature set value; used to recalculate the opening adjustment ratio V of the gas electric regulating valve through the proportional band and integral according to the deviation value calculated by the data calculation module i , and pass the calculation results to the control module;

[0122] Control module: used to adjust the opening of the gas electric regulating valve of the annular double-chamber kiln according to the calculation results transmitted by the data analysis module.

[0123] In this embodiment, the control system further includes a flow meter and a thermometer. The flow meter is used to collect the gas measurement value of the gas branch pipe; the thermometer is used to collect the combustion temperature in the annular double-chamber kiln.

[0124] In the present invention, the theoretical gas value of the gas branch pipe where each gas electric regulating valve of the inner and outer rings of the annular double-chamber kiln is located is calculated based on the acquired data, and the deviation value is calculated based on the theoretical gas value and the gas measurement value, and the opening adjustment ratio U of the gas electric regulating valve is further calculated through the proportional band. i ; Automatic and precise control of the opening of the gas electric valve is achieved, thereby controlling the accuracy of the gas input into the annular double-chamber kiln; when the combustion temperature in the annular double-chamber kiln is abnormal after adjustment, the opening adjustment ratio V of the gas electric regulating valve is further calculated again through the proportional band and integral i , ensuring that the combustion temperature of the annular double-chamber kiln is normal when it is running after gas regulation, thereby improving the calcination efficiency of the lime in the annular double-chamber kiln and the qualified rate of the produced lime products.

[0125] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for regulating and controlling gas in an annular double-chamber kiln, characterized in that: The following steps are involved: S1. Obtain the following data of the annular double-chamber kiln: daily output setting value D, gas flow theoretical value L, gas calorific value Q, lime output setting value M, and inner and outer ring gas percentage setting value K, and calculate the gas theoretical value of the gas branch pipe where the inner and outer ring gas electric regulating valves of each annular double-chamber kiln are located; S2. Compare the calculated theoretical gas value of the gas branch pipe where the gas electric regulating valve on the inner and outer rings of the annular double-chamber kiln is located with the actual gas measurement value of the gas branch pipe, and calculate the deviation value e i : e i =b i -c i ; Where: e i is the deviation value of the gas branch where the i-th gas electric regulating valve is located; b i is the theoretical value of the gas in the gas branch where the i-th gas electric regulating valve is located; c i is the gas measurement value of the gas branch where the i-th gas electric regulating valve is located; i is the number of gas electric regulating valves; S3, based on the deviation value of step S2, the opening adjustment ratio U of the gas electric regulating valve is calculated using the proportional band i ; IN i =Kp×e i Among them: U i is the opening adjustment ratio of the i-th gas electric regulating valve, Kp is the proportional band gain, and is a set constant; S4. According to the opening adjustment ratio of the gas electric regulating valve calculated in step S3, the opening of the gas electric regulating valve is adjusted to complete the gas control in the annular double-chamber kiln.

2. The method for controlling the gas of an annular double-chamber kiln according to claim 1, characterized in that: In step S1, the specific method for calculating the theoretical value of the gas of the gas branch pipe where the inner and outer ring gas electric regulating valves of each annular double-chamber kiln are located is: S11. Calculate the theoretical output A of the annular double-chamber kiln per hour based on the daily output setting value D: A=D×1000kg÷24h S12. Calculate the total gas consumption per hour of the annular double-chamber kiln P P=F÷Q×A Among them: F is the heat consumption rate; Q is the calorific value of gas; S13. Calculate the gas consumption N of the inner and outer rings of the annular double-chamber kiln N=P×K Where: K is the set value of the inner and outer ring gas percentage; S14. Calculate the consumption of gas branch pipes where each gas electric regulating valve is located in the inner and outer rings of the annular double-chamber kiln B B=N÷H H is the total number of gas branch pipes on the inner and outer rings of the annular double-chamber kiln; S15. Calculate the theoretical value b of the gas in the gas branch where the inner and outer ring gas electric regulating valves of each annular double-chamber kiln are located. i b i =B×η Where: η is the adjustment coefficient, which can take any value between 0 and 1.

3. The method for controlling the gas of an annular double-chamber kiln according to claim 2, characterized in that: In step S12, the heat rate F is calculated using the following formula: F=(Q×L) / M Where: L is the theoretical value of gas flow, M is the set value of lime production, and Q is the calorific value of gas.

4. The method for controlling the gas of an annular double-chamber kiln according to claim 2, characterized in that: In step S14, the total number of gas branch pipes on the inner and outer rings of the annular double-chamber kiln is 64.

5. The method for controlling the gas of an annular double-chamber kiln according to claim 1, characterized in that: In step S3, the value of Kp is 100-300.

6. The method for controlling the gas in an annular double-chamber kiln according to claim 1, characterized in that: The annular double-chamber kiln gas control method also includes: After the gas control in the annular double-chamber kiln is completed in step S4, it is also necessary to collect the combustion temperature in the annular double-chamber kiln in real time, and compare the collected combustion temperature in the annular double-chamber kiln with the combustion temperature setting value in the annular double-chamber kiln. When the collected combustion temperature in the annular double-chamber kiln is not within the range of the combustion temperature setting value in the annular double-chamber kiln, step S5 is further executed. The combustion temperature setting value in the annular double-chamber kiln is 1000°C to 1200°C; S5. Calculate the opening adjustment ratio V of the gas electric regulating valve through the proportional band and integral i : In i =Kp×ei+Ki×eidt Where: V i is the opening adjustment ratio of the i-th gas electric regulating valve, Kp is the proportional band gain, which is a set constant; Ki is the integral gain, unit: s, which is a set constant; dt is the integral symbol; e i is the deviation value; S6. According to the above calculation, the opening adjustment ratio V of each gas electric regulating valve i , adjust the opening of each gas electric regulating valve.

7. The method for controlling the gas in an annular double-chamber kiln according to claim 6, characterized in that: The value of Ki is 10s to 30s.

8. The method for controlling the gas in an annular double-chamber kiln according to claim 1, characterized in that: In the step S2, the gas measurement value of the gas branch pipe is collected by a flow meter.

9. A control system for implementing the annular double-chamber kiln gas control method according to claim 6, characterized in that: The control system comprises: Data acquisition module: used to obtain the daily output set value D, gas flow theoretical value L, gas calorific value Q, lime output set value M, inner and outer ring gas percentage set value K, set value in the annular double-chamber kiln, gas measurement value of the collected gas branch pipe, and combustion temperature in the collected annular double-chamber kiln; Data calculation module: used to calculate the gas theoretical value and deviation value of the gas branch where the inner and outer ring gas electric regulating valves of each annular double-chamber kiln are located according to the data obtained by the data acquisition module, and pass the calculation results to the data analysis module; Data analysis module: used to calculate the opening adjustment ratio U of the gas electric regulating valve using the proportional band according to the deviation value calculated by the data calculation module i and pass the calculation results to the control module; used to compare the combustion temperature in the annular double-chamber kiln collected in real time with the combustion temperature set value; used to recalculate the opening adjustment ratio V of the gas electric regulating valve through the proportional band and integral according to the deviation value calculated by the data calculation module i , and pass the calculation results to the control module; Control module: used to adjust the opening of the gas electric regulating valve of the annular double-chamber kiln according to the calculation results transmitted by the data analysis module.

10. The control system according to claim 9, characterized in that: The control system also includes a flow meter and a thermometer. The flow meter is used to collect the gas measurement value of the gas branch pipe; the thermometer is used to collect the combustion temperature in the annular double-chamber kiln.