Gas mixing control equipment and control method for industrial burners

Abstract

The present application relates to the technical field of burners, and in particular to a gas mixing control device, a control method and an apparatus for industrial burners. The method comprises: collecting the gas pressure and gas concentration at each moment in the waste gas collection pipe (4); when the gas pressure is greater than a preset upper limit of the gas pressure, opening a flap valve (3) to allow the gas to enter the flare head (1) through the venting cylinder (2); and controlling ignition by a PLC control cabinet (9); recording the corresponding moment of opening the flap valve (3) as the initial moment, determining the compensation coefficient of the accompanying burner at the initial moment; obtaining the gas pressure outputted by the accompanying burner at the initial moment; introducing the gas pressure time decay feature, and using the PLC control cabinet (9) to control the output gas pressure of the accompanying burner; and closing the flap valve when the gas pressure in the waste gas collection pipe (4) drops to a preset value. Thus, the combustion efficiency of the industrial burner is improved.

Description

Technical Field

[0001] The present application relates to the technical field of burners, and in particular to a gas mixing and control device and a control method for industrial burners. Background Art

[0002] Industrial burners are devices used in industrial production processes. Their primary function is to convert fuel into heat through combustion, which is used in various industrial processes such as heating, drying, and smelting. Gas mixing control precisely adjusts the fuel-air ratio to ensure ideal combustion conditions. This process ensures efficient, safe, and environmentally friendly combustion.

[0003] In traditional burner exhaust gas release ignition, the exhaust gas is ignited and released through fixed judgment conditions, igniting and releasing the exhaust gas. However, in the actual process, the influence of the fluctuating content of combustible gas with industrial production is ignored, and there are often problems such as ignition failure or insufficient exhaust gas combustion efficiency. Summary of the Invention

[0004] In order to solve the above technical problems, the purpose of this application is to provide a gas mixing control device and a control method for industrial burners. The technical solutions adopted are as follows:

[0005] In a first aspect, an embodiment of the present application further provides a gas mixing control method for an industrial burner, the method being implemented using a gas mixing control device, the gas mixing control device comprising: a flare head for igniting exhaust gas, a discharge cylinder, a flap valve, an exhaust gas collection pipe, a tar-proof ignition rod, a co-firing device, an ignition rod control line, a co-firing device control line, a PLC control cabinet, and an air pressure sensor and a VOCs concentration sensor installed on the side where the flap valve is connected to the exhaust gas collection pipe, a thermocouple temperature sensor and an air pressure sensor installed in the flare head, wherein the co-firing device includes a co-firing device and a co-firing container, and the method comprising:

[0006] The gas pressure and gas concentration at each moment in the exhaust gas collection pipeline are collected. When the gas pressure exceeds the preset upper pressure limit, the flap valve is opened to allow the gas to enter the flare head through the discharge cylinder, and the ignition is controlled by the PLC control cabinet;

[0007] Collecting the gas pressure at each moment in the flare head, recording the moment corresponding to the opening of the flap valve as the initial moment, analyzing the difference between the gas pressure in the exhaust gas collection pipe and the gas pressure in the flare head at the initial moment, and combining the gas concentration at the initial moment to determine the compensation coefficient of the co-burner at the initial moment;

[0008] The gas pressure outputted by the co-firing container at the initial moment is obtained based on the compensation coefficient, the preset scaling factor, and the fixed gas pressure outputted by the co-firing container; the gas pressure outputted by the co-firing container at the initial moment is controlled by a PLC control cabinet by introducing a gas pressure time decay characteristic through the gas pressure outputted by the co-firing container at the initial moment;

[0009] When the gas pressure in the exhaust gas collection pipe drops to a preset value, the flap valve is closed.

[0010] In one embodiment, the temperature of the flare head at each moment is collected, and the temperature variation trend after the initial moment is analyzed to determine whether the accompanying burner is ignited successfully.

[0011] In one embodiment, the time for gas to flow from the flap valve to the flare head is recorded as the first time duration, and the temperatures at all times within the first time duration starting from the initial moment are composed of a temperature sequence, and the trend strength of the temperature sequence is determined. If the trend strength is within a preset numerical range, it is determined that the companion burner is ignited successfully; otherwise, it is determined that the ignition has failed, and a secondary ignition is performed until the companion burner is ignited successfully.

[0012] In one embodiment, determining the compensation coefficient includes:

[0013] Recording the difference as a first difference; if the gas concentration at the initial moment is greater than a preset lower limit of gas ignitable concentration, recording the difference between the gas concentration at the initial moment and the preset lower limit of gas ignitable concentration as a second difference; and the compensation coefficient is positively correlated with the first difference and negatively correlated with the second difference;

[0014] If the gas concentration at the initial moment is less than or equal to the preset lower limit of gas ignitable concentration, the compensation coefficient is positively correlated with the first difference and negatively correlated with the gas concentration at the initial moment.

[0015] In one embodiment, the gas pressure output by the co-firing container at the initial moment is the product of the compensation coefficient, a preset scaling factor, and the fixed gas pressure output by the co-firing container.

[0016] In one embodiment, controlling the output gas pressure of the co-firing container includes:

[0017] Calculate the difference between each time after the initial time and the first time period. If the difference is less than or equal to 0, the output gas pressure of the co-firing container is the gas pressure output by the co-firing container at the initial time.

[0018] If the difference is greater than 0, the output gas pressure of the co-firing container at each moment is determined based on the difference and the gas pressure output by the co-firing container at the initial moment.

[0019] In one embodiment, determining the output gas pressure of the sintering container at each moment includes:

[0020] The inverse of the difference is used as the exponent of an exponential function with a natural constant as the base, and the output gas pressure of the co-firing container at each moment is the product of the calculation result of the exponential function at each moment and the gas pressure output by the co-firing container at the initial moment.

[0021] In one embodiment, if the gas concentration at the initial moment is less than or equal to the preset lower limit of gas ignition concentration, the output gas pressure of the co-firing container at each moment after the initial moment remains unchanged at the gas pressure output by the co-firing container at the initial moment.

[0022] In a second aspect, an embodiment of the present application also provides a gas mixing and control device for an industrial burner, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor implements the steps of any one of the above methods when executing the computer program.

[0023] This application has at least the following beneficial effects:

[0024] The present application collects the gas pressure and gas concentration at each moment in the exhaust gas collection pipeline. When the gas pressure is greater than the preset upper limit of the gas pressure, the flap valve is opened to allow the gas to enter the flare head through the discharge cylinder, and the ignition is controlled by the PLC control cabinet; the gas pressure at each moment in the flare head is collected, and the corresponding moment of opening the flap valve is recorded as the initial moment. The difference between the gas pressure in the exhaust gas collection pipeline and the gas pressure in the flare head at the initial moment is analyzed, and the compensation coefficient of the co-burner at the initial moment is determined in combination with the gas concentration at the initial moment; the introduction of the compensation coefficient realizes the dynamic and precise control of the exhaust gas combustion process, improves the stability of the combustion temperature, and avoids the exhaust gas combustion caused by the fluctuation of the gas concentration in the traditional burner The problem of insufficient combustion; based on the compensation coefficient, the preset scaling factor, and the fixed gas pressure output by the co-firing container, the gas pressure output by the co-firing container at the initial moment is obtained; the matching between the gas pressure output by the co-firing container at the initial moment and the combustible gas content in the exhaust gas is improved, which is helpful to the reliability of the subsequent gas pressure regulation of the co-firing container output; the gas pressure time decay feature is introduced through the gas pressure output by the co-firing container at the initial moment, and the output gas pressure of the co-firing container is controlled by the PLC control cabinet; the control accuracy of the output gas pressure of the co-firing container is improved, and the adaptability of the industrial burner in dealing with high-volatility exhaust gas emission scenarios is improved, thereby improving the exhaust gas combustion efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions and advantages of the embodiments of the present application or the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0026] Figure 1 A block diagram of a gas mixing control device provided in one embodiment of the present application;

[0027] Figure 2 A flow chart of a method for controlling gas mixing of an industrial burner;

[0028] Figure 3 This is the flow chart for controlling the output gas pressure of the co-firing container. DETAILED DESCRIPTION

[0029] To further illustrate the technical means and effectiveness of this application to achieve its intended purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, describes in detail the specific implementation, structure, features, and effectiveness of the gas mixing and control device and control method for industrial burners proposed in this application. In the following description, different references to "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

[0030] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0031] The specific scheme of the gas mixing control device and control method for industrial burners provided by this application is described in detail below with reference to the accompanying drawings.

[0032] See also Figure 1 , which shows a block diagram of the gas mixing control device of this embodiment, wherein, Figure 1 1 represents the flare head of the burner, which is used for igniting the exhaust gas. The flare head includes a windproof igniter to make the flare head have a windproof function. 2 represents the dispersion cylinder. 3 represents the flap valve to realize the exhaust gas discharge. 4 represents the exhaust gas collection pipe. 5 represents the anti-tar ignition rod. The lower end of the anti-tar ignition rod is connected to the medium ion bombardment flame generator. 6 represents the co-firing device, which includes a co-firing device and a co-firing container. 7 represents the ignition rod control line. 8 represents the co-firing device control line. 9 represents the PLC control cabinet of the burner, as well as the air pressure sensor and VOCs concentration sensor installed on the side where the flap valve 3 is connected to the exhaust gas collection pipe 4, and the thermocouple temperature sensor and air pressure sensor installed in the flare head 1.

[0033] The embodiment of the present application also provides a method for controlling gas mixing of an industrial burner. The flow chart of the method for controlling gas mixing of an industrial burner is as follows: Figure 2 As shown, the method includes the following steps:

[0034] S1, collecting the gas pressure and gas concentration at each moment in the exhaust gas collecting pipe 4, collecting the gas pressure at each moment in the flare head 1, and collecting the temperature at each moment in the flare head.

[0035] In traditional burner co-firing device control, when the organic gas content in the exhaust gas collection pipe is detected to be lower than the combustible content, the co-firing device is directly activated. By setting a fixed output pressure for the co-firing vessel, the treatment effect of the combustion exhaust gas is improved. However, in actual operation, the organic content in the exhaust gas changes dynamically. Therefore, when the co-firing device outputs a fixed pressure, it will lead to mismatched gas mixing control, affecting the combustion effect of the exhaust gas.

[0036] Therefore, in order to achieve precise control of the burner, it is necessary to collect data information in the gas processing process in real time. This embodiment uses the air pressure sensor and VOCs concentration sensor installed on the side where the flap valve is connected to the exhaust gas collection pipe to collect the gas pressure and gas concentration in the exhaust gas collection pipe at each moment in real time; in addition, the thermocouple temperature sensor and air pressure sensor installed in the flare head are used to collect the temperature and gas pressure in the flare head at each moment in real time.

[0037] It should be noted that in this embodiment, the VOCs concentration sensor, thermocouple temperature sensor, and all air pressure sensors are collected synchronously, and the collection interval is 0.5s. The implementer can set the collection interval according to the actual situation, and this embodiment does not impose any restrictions here.

[0038] S2, when the gas pressure in the exhaust gas collecting pipe 4 is greater than the preset upper pressure limit, the flap valve 3 is opened to allow the gas to enter the flare head 1 through the discharge cylinder 2, and the ignition is controlled by the PLC control cabinet 9.

[0039] The waste gas collection pipe continuously collects residual waste gas from industrial production, so the air pressure in the waste gas collection pipe will gradually increase. When the gas pressure reaches the preset upper pressure limit, the PLC control cabinet sends a control signal to open the flap valve to release the combustible waste gas.

[0040] It should be noted that the preset upper limit of air pressure is related to the specific actual scenario and is set based on the corresponding process requirements. The gas collected in this embodiment is low-pressure coke oven gas. According to the coke oven process requirements, the set air pressure value range is 250~300Pa. Therefore, the upper limit of air pressure is set to 300Pa during the implementation process.

[0041] At the same time, the flammable gas content in the exhaust gas collection process is not constant. If the flammable gas content is low, it may not be ignited if it is directly ignited. In this case, the flammable gas in the exhaust gas is directly discharged into the atmosphere, causing air pollution. The lower limit of flammable gas ignition is often different for different flammable gases.

[0042] The combustible gas in the waste gas recovered in this embodiment is coal gas, namely carbon monoxide. At this time, the range of combustibility is 12.5%~74.5%. When the concentration of carbon monoxide in the waste gas is lower than the lower limit of this range, the carbon monoxide in the waste gas will not be easily ignited.

[0043] When the combustible gas concentration in the exhaust gas is below the ignition limit, the accompanying burner acts as a combustion promoter, dispersing and igniting the remaining combustible gas in the exhaust gas. At the same time, when the combustible gas concentration is above the ignition limit, the plasma igniter on the ignition rod continuously operates to ignite the gas. However, if the plasma igniter continuously operates, it will shorten the life of the igniter. To extend the life of the igniter, the accompanying burner is also required to intervene and act as an ignition device.

[0044] S3, record the corresponding moment of opening the flap valve 3 as the initial moment, analyze the difference between the gas pressure in the exhaust gas collection pipe 4 and the gas pressure in the flare head 1 at the initial moment, and determine the compensation coefficient of the co-burner at the initial moment in combination with the gas concentration at the initial moment.

[0045] In traditional burner control, when the pressure in the exhaust gas collection line is detected to be above the upper pressure limit, the flap valve is directly opened, allowing the exhaust gas to be discharged into the vent cylinder. At this point, the exhaust gas, affected by the air pressure, will quickly move toward the flare head. When the flap valve is open, the flare vessel typically outputs a fixed pressure to the flare port. The flare port is the flame outlet of the flare vessel in the flare head. The plasma igniter in the ignition rod ignites the combustible gas within the flare vessel, preventing repeated ignition and shortening the igniter's life. However, in practice, the gas pressure discharged from the flap valve may be higher. The resulting high airflow in the vent cylinder could directly extinguish the flare vessel flame, thus affecting ignition stability. Therefore, compensation for the flare vessel's output pressure is necessary.

[0046] Therefore, this embodiment continuously monitors the air pressure in the exhaust gas collection pipe. If the air pressure exceeds the upper pressure limit, the flap valve is opened, and the PLC control cabinet sends an ignition command. At this time, the burner is in the ignition state. The air pressure in the exhaust gas collection pipe when the burner switches to the ignition state is recorded as the initial pipe pressure. At the same time, the air pressure at the flare head when the burner switches to the ignition state is recorded as the initial pipe pressure. The time when the burner switches to the ignition state is recorded as the initial moment, which is also the corresponding moment when the flap valve is opened. The greater the deviation between the initial pipe pressure and the initial pipe pressure, the greater the flow rate of the exhaust gas in the exhaust gas collection pipe when it is transmitted to the flare head, and the greater the need to compensate for the output air pressure of the co-firing container.

[0047] Based on the above analysis, the compensation coefficient of the accompanying burner at the initial moment is calculated first. The specific calculation method is:

[0048] When the concentration of combustible gas in the exhaust gas at the initial moment is greater than the lower limit of gas ignition concentration, that is, when the gas concentration collected by the VOCs concentration sensor is greater than the lower limit of gas ignition concentration, the expression of the compensation coefficient is:

[0049] Where, is the compensation coefficient of the companion burner at the initial moment, norm() is the normalization function, is the initial gas pressure in the tube, is the initial nozzle pressure, is the difference between the concentration of combustible gas in the exhaust gas at the initial moment and the lower limit of the gas ignition concentration. Recorded as the first difference, Recorded as the second difference.

[0050] It should be understood that the greater the pressure difference between the inside of the tube and the outside of the tube, the greater the airflow when the burner is ignited, making it less likely that the exhaust gas will be ignited, and the larger the compensation coefficient will be at this time. At the same time, if the concentration of combustible gas in the exhaust gas is higher, the gas will be more easily ignited, which is negatively correlated with the value of the compensation coefficient.

[0051] When the concentration of combustible gas in the exhaust gas at the initial moment is less than or equal to the lower limit of gas ignitable concentration, the expression of the compensation coefficient is:

[0052] Where, is the compensation coefficient of the companion burner at the initial moment, norm() is the normalization function, is the initial gas pressure in the tube, is the initial nozzle pressure, is the concentration of combustible gas in the exhaust gas at the initial moment.

[0053] At this time, the lower the concentration of combustible gas in the exhaust gas collection pipe, the less likely it is to be ignited. Therefore, it is necessary to increase the compensation coefficient of the co-firing device and increase the output gas pressure of the co-firing container.

[0054] S4, based on the compensation coefficient, the preset scaling factor, and the fixed gas pressure output by the co-firing container, obtain the gas pressure output by the co-firing container at the initial moment; analyze the temperature change trend after the initial moment to determine whether the co-firing device is ignited successfully.

[0055] Based on the obtained compensation coefficient, the pressure of the combustion gas output from the combustion vessel in the combustion device is adjusted, specifically: Where, is the gas pressure output from the combustion vessel at the initial moment, is the compensation coefficient of the co-burner at the initial moment, The scaling factor is a preset scaling factor. The larger the scaling factor value is, the more sensitive it is to the air pressure adjustment. The scaling factor value range is [2,5]. In this embodiment, the scaling factor value is 3. The implementer can adjust it according to the actual situation. This embodiment does not impose any restrictions here. is the fixed gas pressure output from the co-firing container. In this embodiment, the fixed gas pressure is the lower limit of the set gas pressure range.

[0056] Using the calculated initial output pressure of the co-burning vessel, the PLC control cabinet controls the output pressure of the co-burning vessel, activates the co-burner, and simultaneously activates the ignition rod to ignite the co-burner. This allows the combustible gas in the exhaust gas collection pipe to be directly ignited by the co-burner flame when it reaches the flare tip, making it less susceptible to being extinguished by the airflow.

[0057] In addition, the success of ignition needs to be detected by a thermocouple temperature sensor, and the time for the gas to travel from the flap valve to the flare head is recorded as the first time. , starting from the initial moment, the temperatures collected at all moments within the first time period are used to form a temperature sequence, and the Hurst index is used to obtain the trend strength of the temperature sequence. The trend strength of the temperature sequence is used as the discrimination value for successful ignition. If the discrimination value is within the interval of [0.5, 1], it is determined that the companion burner is ignited successfully. Otherwise, it is determined that the ignition fails and a secondary ignition is required until the companion burner is ignited successfully.

[0058] It should be noted that obtaining trend strength by using the Hurst index is a well-known technique. Implementers can choose other feasible methods for obtaining trend strength at their own discretion, and this embodiment does not impose any limitation thereto.

[0059] S5, by introducing the gas pressure time decay feature of the gas output from the co-firing container at the initial moment, the PLC control cabinet 9 is used to control the output gas pressure of the co-firing container; when the gas pressure in the exhaust gas collection pipe 4 drops to the preset value, the flap valve is closed.

[0060] In addition, when the exhaust gas is transported to the flare head, it can be directly ignited by the flame of the co-burner. At this time, the temperature inside the flare head rises sharply, and the co-burner can be directly shut down. In traditional control, the output of the co-burning container is directly shut down, but it is easy to form an air hammer effect, which affects the service life of the co-burning container.

[0061] Therefore, in this embodiment, the time decay of gas pressure is introduced to calculate the output gas pressure of the sintering container at each time after the initial time. The specific calculation method is: , where Indicates the output gas pressure of the combustion container at each moment after the initial moment. is the gas pressure output from the combustion vessel at the initial moment, exp() represents an exponential function with a natural constant as the base, t represents the current sampling moment, Indicates the first duration.

[0062] It should be noted that, starting from the initial moment, During the time, the gas pressure output from the burning vessel is kept at the gas pressure output from the burning vessel at the initial moment. The flow chart of the gas pressure control of the burning vessel output is as follows: Figure 3 shown.

[0063] Because the amount of combustible gas collected in the exhaust collection pipe changes dynamically with the actual industrial production environment, the concentration of combustible gas in the exhaust gas may fall below the lower ignition limit. Traditional burner control processes ignore the impact of dynamic changes in combustible gas content on the burner, making burner failure more likely in this situation.

[0064] Based on this, when the concentration of combustible gas in the exhaust gas is less than or equal to the lower limit of the gas ignitable concentration at the initial moment, the role of the co-burner will be greater and it needs to have a combustion-promoting effect, that is, it is necessary to ignite the low content of combustible gas in the exhaust gas. Therefore, it is necessary to further adjust the output pressure of the co-burning container to improve the combustion efficiency of the combustible gas in the exhaust gas.

[0065] Therefore, for the situation where the combustible gas concentration in the exhaust gas at the initial moment is less than or equal to the lower limit of the gas ignitable concentration, this embodiment maintains the gas pressure output by the co-firing container at each moment after the initial moment consistent with the gas pressure output by the co-firing container at the initial moment based on the calculated gas pressure output by the co-firing container at the initial moment, and does not perform gas pressure time decay. The purpose is that under the current situation, the combustible gas content in the exhaust gas is low and not easy to be ignited. Therefore, continuous high-intensity co-firing is required to fully ignite the combustible gas in the exhaust gas, thereby improving the exhaust gas treatment efficiency.

[0066] Therefore, when the exhaust gas is discharged from the flap valve, the air pressure at the flap valve will slowly decrease. At this time, the burner is always in the ignition state. When the air pressure at the flap valve drops to 50%, the burner will be in the ignition state. When the flap valve is closed, the burner is in dormant state and is ready to enter the next ignition state at any time based on the air pressure at the flap valve. The fixed gas pressure output from the co-firing vessel.

[0067] Based on the same inventive concept as the above method, an embodiment of the present application also provides a gas mixing control device for an industrial burner, comprising a memory, a processor, and a computer program stored in the memory and running on the processor. When the processor executes the computer program, the steps of any one of the above-mentioned gas mixing control methods for an industrial burner are implemented.

[0068] It should be noted that the order in which the embodiments of the present application are presented is for illustrative purposes only and does not necessarily represent the superiority or inferiority of the embodiments. Furthermore, the foregoing descriptions of specific embodiments of this specification are provided. Furthermore, the processes depicted in the accompanying drawings do not necessarily require the specific order or sequential sequence shown to achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0069] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0070] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A gas mixing control method for an industrial burner, the method being implemented using a gas mixing control device, the gas mixing control device comprising: A flare head (1) for igniting waste gas, a flare cylinder (2), a flap valve (3), a waste gas collecting pipe (4), a tar-proof ignition rod (5), a co-firing device (6), an ignition rod control line (7), a co-firing device control line (8), a PLC control cabinet (9), and an air pressure sensor and a VOCs concentration sensor installed on the side where the flap valve (3) is connected to the waste gas collecting pipe (4), a thermocouple temperature sensor and an air pressure sensor installed in the flare head (1), wherein the co-firing device (6) includes a co-firing device and a co-firing container, and is characterized in that the method comprises: The gas pressure and gas concentration at each moment in the waste gas collection pipe (4) are collected. When the gas pressure is greater than a preset upper pressure limit, the flap valve (3) is opened to allow the gas to pass through the discharge cylinder (2) and enter the flare head (1). The ignition is controlled by the PLC control cabinet (9); The gas pressure at each moment in the flare head (1) is collected, and the corresponding moment when the flap valve (3) is opened is recorded as the initial moment. The difference between the gas pressure in the exhaust gas collection pipe (4) and the gas pressure in the flare head (1) at the initial moment is analyzed, and the compensation coefficient of the co-burner at the initial moment is determined in combination with the gas concentration at the initial moment; Based on the compensation coefficient, the preset scaling factor and the fixed gas pressure output by the co-firing container, the gas pressure output by the co-firing container at the initial moment is obtained; the gas pressure output by the co-firing container at the initial moment is used to introduce the gas pressure time decay feature, and the output gas pressure of the co-firing container is controlled by using a PLC control cabinet (9); When the gas pressure in the exhaust gas collecting pipe (4) drops to a preset value, the flap valve is closed.

2. The gas mixing control method for industrial burners according to claim 1, characterized in that: Collect the temperature of the flare head at each moment, analyze the temperature change trend after the initial moment, and determine whether the accompanying burner is ignited successfully.

3. The gas mixing control method for industrial burners according to claim 2, characterized in that: The time it takes for the gas to travel from the flap valve to the flare head is recorded as the first duration. Starting from the initial moment, the temperatures at all moments within the first duration form a temperature sequence, and the trend strength of the temperature sequence is determined. If the trend strength is within a preset numerical range, it is determined that the companion burner has been ignited successfully; otherwise, it is determined that the ignition has failed, and a secondary ignition is performed until the companion burner is ignited successfully.

4. The gas mixing control method for industrial burners according to claim 1, characterized in that: Determination of the compensation coefficient includes: Recording the difference as a first difference; if the gas concentration at the initial moment is greater than a preset lower limit of gas ignitable concentration, recording the difference between the gas concentration at the initial moment and the preset lower limit of gas ignitable concentration as a second difference; and the compensation coefficient is positively correlated with the first difference and negatively correlated with the second difference; If the gas concentration at the initial moment is less than or equal to the preset lower limit of gas ignitable concentration, the compensation coefficient is positively correlated with the first difference and negatively correlated with the gas concentration at the initial moment.

5. The gas mixing control method for industrial burners according to claim 1, characterized in that: The gas pressure output by the co-firing container at the initial moment is the product of the compensation coefficient, the preset scaling factor, and the fixed gas pressure output by the co-firing container.

6. The gas mixing control method for industrial burners according to claim 3, characterized in that: The controlling of the output gas pressure of the co-firing container comprises: Calculate the difference between each time after the initial time and the first time period. If the difference is less than or equal to 0, the output gas pressure of the co-firing container is the gas pressure output by the co-firing container at the initial time. If the difference is greater than 0, the output gas pressure of the co-firing container at each moment is determined based on the difference and the gas pressure output by the co-firing container at the initial moment.

7. The gas mixing control method for industrial burners according to claim 6, characterized in that: Determining the output gas pressure of the flaring container at each moment includes: The inverse of the difference is used as the exponent of an exponential function with a natural constant as the base, and the output gas pressure of the co-firing container at each moment is the product of the calculation result of the exponential function at each moment and the gas pressure output by the co-firing container at the initial moment.

8. The gas mixing control method for industrial burners according to claim 1, characterized in that: If the gas concentration at the initial moment is less than or equal to the preset lower limit of gas ignitable concentration, the output gas pressure of the co-firing container at each moment after the initial moment remains unchanged at the gas pressure output by the co-firing container at the initial moment.

9. A gas mixing control device for an industrial burner, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 8 are implemented.

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