Fuel gas mixing regulation and control equipment, regulation and control method and device for industrial burner

Abstract

The invention relates to the technical field of combustors, in particular to gas mixing regulation and control equipment, regulation and control method and device for an industrial combustor, and the method comprises the steps that gas pressure and gas concentration in a waste gas collection pipeline (4) at each moment are collected, and when the gas pressure is larger than the preset gas pressure upper limit, a flap valve (3) is opened; gas enters the torch head (1) through the diffusing barrel (2), and ignition is controlled by the PLC control cabinet (9); recording the corresponding moment when the flap valve (3) is opened as an initial moment, and determining a compensation coefficient of the auxiliary burner at the initial moment; acquiring the gas pressure output by the co-combustion container at the initial moment; the air pressure time decay characteristic is introduced, and the output gas pressure of the combustion accompanying container is controlled through a PLC control cabinet (9); and when the gas pressure in the waste gas collecting pipeline (4) is reduced to a preset value, the flap valve is closed. Therefore, the combustion efficiency of the industrial combustor is improved.

Description

Technical Field

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

[0002] Industrial burners are equipment used in industrial production processes. Their main function is to convert fuel into heat energy through combustion, which is used in various industrial processes such as heating, drying, and smelting. Gas mixing control is to accurately adjust the ratio of fuel to air to ensure that the combustion process can be carried out under ideal conditions. Gas mixing control of industrial burners can ensure the efficiency, safety, and environmental protection of the combustion process.

[0003] In the traditional burner exhaust gas release ignition, the exhaust gas is ignited and released through fixed judgment conditions, igniting and releasing, igniting the problem of ignition failure or insufficient exhaust gas combustion efficiency, which is often caused by the fluctuation of the combustible gas content with industrial production in the actual process. 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, a control method and a device for industrial burners. The technical solutions adopted are as follows: In a first aspect, an embodiment of the present application provides a gas mixing and control device for an industrial burner, the device comprising: a flare head (1) for igniting exhaust gas, a ignition barrel (2), a flap valve (3), an exhaust gas collecting pipe (4), an anti-tar ignition rod (5), a co-burning device (6), an ignition rod control line (7), a co-burning 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 exhaust gas collecting pipe (4), and a thermocouple temperature sensor and an air pressure sensor installed in the flare head (1), wherein the co-burning device (6) comprises a co-burning device and a co-burning container.

[0005] In a second aspect, the present application also provides a method for controlling gas mixing of an industrial burner, the method comprising: The gas pressure and gas concentration at each moment in the waste gas collection pipeline (4) are collected, and when the gas pressure is greater than a 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); The gas pressure at each time in the flare head (1) is collected, the corresponding time when the flap valve (3) is opened is recorded as the initial time, 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 time is analyzed, and the compensation coefficient of the co-burner at the initial time is determined in combination with the gas concentration at the initial time; 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; by introducing the gas pressure time decay characteristic through the gas pressure output by the co-firing container at the initial moment, 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.

[0006] 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.

[0007] In one of the embodiments, the time for gas to travel from the flap valve to the flare head is recorded as the first time duration, and a temperature sequence is formed from the initial moment, with the temperature at all moments within the first time duration, 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.

[0008] In one embodiment, determining the compensation coefficient includes: The difference is recorded as a first difference. If the gas concentration at the initial moment is greater than a preset lower limit of the gas ignitable concentration, the difference between the gas concentration at the initial moment and the preset lower limit of the gas ignitable concentration is recorded as a second difference. 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 the gas ignitable concentration, the compensation coefficient is positively correlated with the first difference and negatively correlated with the gas concentration at the initial moment.

[0009] 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.

[0010] In one embodiment, controlling the output gas pressure of the co-firing container includes: Calculate the difference between each moment after the initial moment and the first time length, 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 moment; 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.

[0011] In one embodiment, determining the output gas pressure of the combustion 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.

[0012] In one embodiment, if the gas concentration at the initial moment is less than or equal to the preset lower limit of the 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.

[0013] In a third 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.

[0014] This application has at least the following beneficial effects: The present application collects the gas pressure and gas concentration at each moment in the waste gas collection pipeline (4); when the gas pressure is greater than a preset gas pressure upper limit, opens the flap valve (3) to allow the gas to enter the flare head (1) through the discharge cylinder (2), and controls the ignition by the PLC control cabinet (9); collects the gas pressure at each moment in the flare head (1), records the corresponding moment of opening the flap valve (3) as the initial moment, analyzes the difference between the gas pressure in the waste gas collection pipeline (4) and the gas pressure in the flare head (1) at the initial moment, and determines the compensation coefficient of the co-burner at the initial moment in combination with the gas concentration at the initial moment; the introduction of the compensation coefficient realizes dynamic and precise control of the waste gas combustion process, improves the stability of the combustion temperature, and avoids the traditional burner being damaged by gas. The problem of incomplete combustion of exhaust gas caused by fluctuations in the gas concentration is solved; 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 of 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 helps to ensure the reliability of the subsequent gas pressure regulation of the co-firing container; 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 using the PLC control cabinet (9); 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 the high volatility exhaust gas emission scenario is improved, thereby improving the exhaust gas combustion efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. 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 creative work.

[0016] Figure 1 A block diagram of a gas mixing control device for an industrial burner provided in one embodiment of the present application; Figure 2 A flow chart of a method for controlling gas mixing of an industrial burner; Figure 3 This is the flow chart for regulating the output gas pressure of the co-firing container. DETAILED DESCRIPTION

[0017] In order to further explain the technical means and effects adopted by the present application to achieve the predetermined invention purpose, the following is a detailed description of the gas mixing control equipment, control method and device for industrial burners proposed in the present application, its specific implementation, structure, features and effects, in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0018] 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.

[0019] The specific scheme of the gas mixing control equipment, control method and device for industrial burners provided by the present application is described in detail below with reference to the accompanying drawings.

[0020] See also Figure 1 , which shows a block diagram of a gas mixing control device for an industrial burner provided by an embodiment of the present application, wherein: Figure 1 1 represents the flare head of the burner, which is used for igniting the exhaust gas dispersion, wherein the flare head includes a windproof igniter to make the flare head have a windproof function, 2 represents a dispersion cylinder, 3 represents a flap valve to realize exhaust gas discharge, 4 represents an exhaust gas collecting pipe, 5 represents an anti-tar ignition rod, wherein the lower end of the anti-tar ignition rod is connected to the medium ion bombardment flame generator, 6 represents a co-burning device, and the co-burning device includes a co-burning device and a co-burning container, 7 represents an ignition rod control line, 8 represents a co-burning device control line, 9 represents a PLC control cabinet of the burner, as well as an air pressure sensor and a VOCs concentration sensor installed on the side where the flap valve 3 is connected to the exhaust gas collecting pipe 4, and a thermocouple temperature sensor and an air pressure sensor installed in the flare head 1.

[0021] 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 comprises the following steps: 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.

[0022] In the control of the co-firing device of the traditional burner, when it is detected that the organic gas content in the exhaust gas collection pipeline is lower than the combustible content, the co-firing device will be directly turned on at this time, and the treatment effect of the combustion exhaust gas will be improved by setting a fixed output gas pressure of the co-firing container. However, in the actual process, the organic content in the exhaust gas changes dynamically. Therefore, when the co-firing device outputs a fixed gas pressure, it causes the gas mixing control to be mismatched, affecting the combustion effect of the exhaust gas.

[0023] 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 a pressure sensor and a 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, a thermocouple temperature sensor and an air pressure sensor installed in the flare head are used to collect the temperature in the flare head and the gas pressure at each moment in real time.

[0024] It should be noted that in this embodiment, the VOCs concentration sensor, the thermocouple temperature sensor, and all the 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 limit it.

[0025] 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.

[0026] The waste gas collection pipeline continuously collects residual waste gas from industrial production, so the air pressure in the waste gas collection pipeline will gradually increase. When the gas pressure reaches the preset upper limit, the PLC control cabinet sends a control signal to open the flap valve to release the combustible waste gas.

[0027] It should be noted that the preset upper limit of gas 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 gas pressure value range is 250~300Pa. Therefore, the upper limit of gas pressure is set to 300Pa during the implementation process.

[0028] At the same time, the content of combustible gas is not constant during the collection process of waste gas. If it is ignited directly, when the content of combustible gas is low, it may not be ignited. At this time, the combustible gas in the waste gas is directly discharged into the atmosphere, causing air pollution. Often for different combustible gases, the lower limit of combustible gas ignition is different.

[0029] 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 the range, the carbon monoxide in the waste gas will not be easily ignited.

[0030] When the concentration of combustible gas in the exhaust gas is lower than the ignition lower limit, the accompanying burner acts as a combustion promoter, dispersing and igniting the residual combustible gas in the exhaust gas. At the same time, when the combustible gas is higher than the ignition lower limit, the plasma igniter on the ignition rod keeps working. If the plasma igniter keeps working, the life of the igniter will be reduced. In order to increase the life of the igniter, the accompanying burner also needs to intervene. At this time, the accompanying burner acts as ignition.

[0031] 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 collecting 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.

[0032] In the traditional burner control process, when it is detected that the air pressure value in the exhaust gas collection pipe is greater than the upper limit of the air pressure, the flap valve is directly opened at this time, so that the exhaust gas is discharged into the discharge cylinder. At this time, affected by the air pressure, the exhaust gas will quickly move toward the flare head. When the flap valve is opened, the accompanying burner container often outputs the accompanying burner port at a fixed pressure. The accompanying burner port is the flame outlet of the accompanying burner in the flare head, and the combustible gas in the accompanying burner is ignited by the plasma igniter in the ignition rod to avoid repeated ignition of the igniter and affect its life. However, in the actual process, the gas pressure discharged by the flap valve may be relatively large. At this time, the airflow in the discharge cylinder is relatively large, which may directly blow out the flame of the accompanying burner, thereby affecting the stability of ignition. Therefore, it is necessary to compensate for the output pressure of the accompanying burner container.

[0033] Therefore, this embodiment continuously detects the air pressure value in the exhaust gas collection pipe. If the air pressure value is greater than the upper limit of the air pressure, the flap valve is opened, and the PLC control cabinet sends an ignition command. At this time, the burner is in the ignition state, and the air pressure value in the exhaust gas collection pipe when the burner is switched to the ignition state is recorded as the initial pipe pressure. At the same time, the air pressure value of the torch head when the burner is switched to the ignition state is collected and recorded as the initial pipe mouth air pressure. The time when the burner is switched to the ignition state is recorded as the initial moment, which is also the corresponding moment of opening the flap valve; if the deviation between the initial pipe pressure and the initial pipe mouth pressure is larger, it means that the air flow velocity when the exhaust gas in the exhaust gas collection pipe is transmitted to the torch head is larger, and at this time, the output air pressure of the accompanying burning container needs to be compensated.

[0034] Based on the above analysis, the compensation coefficient of the accompanying burner at the initial moment is first calculated. The specific calculation method is: When the concentration of combustible gas in the exhaust gas at the initial moment is greater than the lower limit of the gas ignitable concentration, that is, when the gas concentration collected by the VOCs concentration sensor is greater than the lower limit of the gas ignitable concentration, the expression of the compensation coefficient is: ; In the formula, 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 ignitable concentration of the gas. Recorded as the first difference, Recorded as the second difference.

[0035] It should be understood that the greater the pressure difference between the inside and outside of the pipe, the greater the airflow when the co-burner is ignited, making it less likely that the exhaust gas will be ignited. The greater 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.

[0036] 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: ; In the formula, 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.

[0037] 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.

[0038] 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.

[0039] Based on the obtained compensation coefficient, the gas pressure of the co-firing gas output from the co-firing container in the co-firing device is adjusted, specifically: ; In the formula, 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, 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 limit it. 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 value range.

[0040] By using the calculated gas pressure output from the accompanying burner at the initial moment, the PLC control cabinet can control the output pressure of the accompanying burner, turn on the accompanying burner, and at the same time turn on the ignition rod to ignite the accompanying burner. Therefore, when the combustible gas in the exhaust gas collection pipe reaches the flare head, it can be directly ignited by the flame of the accompanying burner and is not easily blown out by the airflow.

[0041] 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 duration. , 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 of 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.

[0042] It should be noted that the Hurst index for obtaining the trend strength is a known technology. The implementer may choose other feasible methods for obtaining the trend strength, which is not limited in this embodiment.

[0043] S5, introduces the gas pressure time decay characteristic through the gas pressure output by the co-firing container at the initial moment, and uses the PLC control cabinet 9 to control the output gas pressure of the co-firing container; when the gas pressure in the exhaust gas collection pipeline 4 drops to the preset value, close the flap valve.

[0044] 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 a gas hammer effect, which affects the service life of the co-burning container.

[0045] 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 time after the initial time. 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.

[0046] It should be noted that, starting from the initial moment, During the time, the gas pressure output from the combustion vessel is kept at the gas pressure output from the combustion vessel at the initial moment. The flow chart of the gas pressure control of the combustion vessel output is as follows: Figure 3 shown.

[0047] Since the content of combustible gas collected in the exhaust gas collection pipeline changes dynamically with the actual industrial production environment, the concentration of combustible gas in the exhaust gas may be lower than the lower limit of gas ignition concentration. In the traditional burner control process, the impact of the dynamic change of combustible gas content on the burner is ignored, making the probability of burner failure higher in this case.

[0048] 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.

[0049] 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, based on the calculated gas pressure output by the co-firing container at the initial moment, keeps 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, 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 ignite, so continuous high-intensity co-firing is required to fully ignite the combustible gas in the exhaust gas and improve the exhaust gas treatment efficiency.

[0050] 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 At this time, the flap valve is closed and the burner is in dormant state. Based on the air pressure at the flap valve, it is ready to enter the next ignition state at any time. Fixed gas pressure output from the co-firing vessel.

[0051] 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 industrial burners are implemented.

[0052] It should be noted that the above sequence of the embodiments of the present application is for description only and does not represent the advantages and disadvantages of the embodiments. The above is a description of a specific embodiment of this specification. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0053] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0054] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present application should be included in the protection scope of the present application.

Claims

1. A gas mixing control device for industrial burners, characterized in that: The device comprises: a flare head (1) for igniting waste gas, a ignition barrel (2), a flap valve (3), a waste gas collection pipe (4), an anti-tar ignition rod (5), a co-burning device (6), an ignition rod control line (7), a co-burning 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 collection pipe (4), and a thermocouple temperature sensor and an air pressure sensor installed in the flare head (1), wherein the co-burning device (6) comprises a co-burning device and a co-burning container.

2. A method for controlling gas mixing for industrial burners, which realizes a gas mixing control device for industrial burners as claimed in claim 1, characterized in that: The method comprises: The gas pressure and gas concentration at each moment in the waste gas collection pipeline (4) are collected, and when the gas pressure is greater than a 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); The gas pressure at each time in the flare head (1) is collected, the corresponding time when the flap valve (3) is opened is recorded as the initial time, 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 time is analyzed, and the compensation coefficient of the co-burner at the initial time is determined in combination with the gas concentration at the initial time; 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; by introducing the gas pressure time decay characteristic through the gas pressure output by the co-firing container at the initial moment, 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.

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

4. The gas mixing control method for industrial burners according to claim 3, characterized in that: The time 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 the 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.

5. The gas mixing control method for industrial burners according to claim 2, characterized in that: The determination of the compensation coefficient includes: The difference is recorded as a first difference. If the gas concentration at the initial moment is greater than a preset lower limit of the gas ignitable concentration, the difference between the gas concentration at the initial moment and the preset lower limit of the gas ignitable concentration is recorded as a second difference. 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 the gas ignitable concentration, the compensation coefficient is positively correlated with the first difference and negatively correlated with the gas concentration at the initial moment.

6. 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.

7. The gas mixing control method for industrial burners according to claim 4, characterized in that: The method of controlling the output gas pressure of the co-firing container comprises: Calculate the difference between each moment after the initial moment and the first time length, 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 moment; 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.

8. The gas mixing control method for industrial burners according to claim 7, characterized in that: Determining the output gas pressure of the combustion 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.

9. The gas mixing control method for industrial burners according to claim 2, characterized in that: If the gas concentration at the initial moment is less than or equal to the preset lower limit of the 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.

10. 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 2 to 9 are implemented.

Images