Control method and system for combustion of heat treatment furnace and readable storage medium

Abstract

The invention provides a control method and system for combustion of a heat treatment furnace and a readable storage medium. The control method comprises the following steps: acquiring a gas heat value and a gas flow value of current gas, and calculating a theoretically required air quantity; smoke components in all smoke pipelines of the heat treatment furnace are collected, and the actual air supply amount is calculated; determining an air consumption coefficient mu according to the theoretical required air quantity and the actual supplied air quantity; comparing the air consumption coefficient mu with a target control value; and if the two values are not matched, at least one of the gas pressure value, the gas flow value, the combustion-supporting air pressure value and the combustion-supporting air flow is adjusted until the smoke components reach the standard. According to the control method for combustion of the heat treatment furnace, through real-time monitoring and intelligent adjustment, accurate control over the combustion process of the heat treatment furnace is achieved, the combustion efficiency is improved, energy consumption is reduced, and pollutant emission is reduced. The method is suitable for combustion control of the heat treatment furnace in industrial production and has a wide application prospect.

Description

Technical Field

[0001] The control of the heat treatment furnace of the present invention, in particular, relates to a control method, system and readable storage medium for the combustion of the heat treatment furnace. Background Art

[0002] Green manufacturing has become an important trend in the development of the steel industry. Improving the mechanical properties of plain steel through heat treatment is the most direct way to achieve lightweight and thus energy conservation and emission reduction. The heat treatment furnace is a key equipment on the steel plate heat treatment production line, with high automation and is widely favored by major steel enterprises.

[0003] At present, most heat treatment furnaces do not monitor the combustion situation of the burners in real time, seriously affecting the combustion efficiency of the heat treatment furnace and environmental protection emissions. Summary of the Invention

[0004] The main object of the present invention is to provide a control method, system and readable storage medium for the combustion of a heat treatment furnace, so as to solve the technical problems of the combustion efficiency of the heat treatment furnace and environmental protection emissions.

[0005] To achieve the above object, the present invention provides a control method for the combustion of a heat treatment furnace, including the following steps:

[0006] Obtain the calorific value and gas flow value of the current gas, and calculate the theoretically required air volume.

[0007] Collect the flue gas components in each flue gas pipeline of the heat treatment furnace, and calculate the actually supplied air volume.

[0008] Determine the air consumption coefficient μ according to the theoretically required air volume and the actually supplied air volume.

[0009] Compare the air consumption coefficient μ with the target control value. If the two do not match, adjust at least one of the gas pressure value, gas flow value, combustion-supporting air pressure value and combustion-supporting air flow until the flue gas components meet the standards.

[0010] According to an embodiment of the present application, during the process of adjusting the flue gas components to meet the standards, if the detected carbon monoxide content is greater than the carbon monoxide target content of the target flue gas components, and the detected oxygen content is less than the oxygen target content of the target flue gas components. Then increase the combustion-supporting air pressure value and / or the combustion-supporting air flow for adjustment until the flue gas components meet the standards.

[0011] According to an embodiment of the present application, during the process of adjusting the flue gas components to meet the standards, when the detected oxygen content < 1% and the detected carbon monoxide content > 1000 ppm, first reduce the pressure and flow rate of the gas, then increase the pressure or flow rate of the combustion-supporting air, and reduce the calorific value of the gas within the adjustable range of the calorific value of the gas, and adjust until the CO content in the flue gas is less than 1000 ppm.

[0012] According to an embodiment of the present application, during the process of adjusting the flue gas components to meet the standards, if the detected carbon monoxide content is less than the carbon monoxide target content of the target flue gas components, and the detected oxygen content is greater than the oxygen target content of the target flue gas components. Then reduce the pressure value and / or flow rate of the combustion-supporting air for adjustment until the flue gas components meet the standards.

[0013] According to an embodiment of the present application, during the process of adjusting the flue gas components to meet the standards, when the detected oxygen content > 3% and the detected carbon monoxide content < 100 ppm, first increase the pressure and flow rate of the gas, then increase the pressure or flow rate of the combustion-supporting air, and reduce the calorific value of the gas within the adjustable range of the calorific value of the gas, and adjust until the CO content in the flue gas is less than 1000 ppm.

[0014] According to an embodiment of the present application, during the process of adjusting the flue gas components to meet the standards, when the detected oxygen content and the detected carbon monoxide content in the flue gas components do not meet the standards, at least adjust the pressure value and flow rate of the combustion-supporting air simultaneously. The adjustment process includes:

[0015] Adjust the rotation speed of the combustion-supporting fan according to the mapping relationship among the rotation speed of the combustion-supporting fan, the pressure value of the combustion-supporting air, and the flow rate of the combustion-supporting air.

[0016] According to an embodiment of the present application, the steps of obtaining the calorific value and flow rate value of the current gas and calculating the theoretically required air volume include:

[0017] Measure the component content in the current gas, and calculate the calorific value of the current gas according to the standard calorific values of the components.

[0018] Real-time collect the flow rate value of the current gas entering the heat treatment furnace.

[0019] Determine the theoretically required air volume according to the component content and flow rate value of the current gas.

[0020] According to an embodiment of the present application, the method for determining the target control value includes:

[0021] Determine the target control value according to the theoretically required air volume and the historical combustion efficiency value of the heat treatment furnace.

[0022] The present application also provides a control system for the combustion of a heat treatment furnace, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the above-mentioned control method for the combustion of the heat treatment furnace are implemented.

[0023] The present application also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the control method for the combustion of the heat treatment furnace as described above.

[0024] The above-mentioned control method for the combustion of the heat treatment furnace realizes the precise control of the combustion process of the heat treatment furnace through real-time monitoring and intelligent adjustment, improves the combustion efficiency, reduces the energy consumption, and reduces the pollutant emissions. This method is applicable to the combustion control of heat treatment furnaces in industrial production and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0026] Figure 1 is a relationship diagram of oxygen concentration and NO X reduction rate in an embodiment of the present application;

[0027] Figure 2 is a relationship diagram of air volume and air pressure in an embodiment of the present application;

[0028] Figure 3 is a relationship diagram of furnace pressure, heat loss, and temperature in an embodiment of the present application;

[0029] Figure 4 is a relationship diagram of heating temperature and burning loss in an embodiment of the present application;

[0030] Figure 5 is a schematic diagram of the control system for the combustion of the heat treatment furnace in an embodiment of the present application.

[0031] The realization of the object, functional characteristics, and advantages of the present invention will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] It should be noted that all directional indications (such as up, down,...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0034] In addition, in the present invention, descriptions such as "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature.

[0035] Moreover, the technical solutions between various embodiments of the present invention can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0036] The present invention provides a control method for the combustion of a heat treatment furnace, including the following steps:

[0037] S100: Obtain the calorific value and gas flow value of the current gas, and calculate the theoretically required air volume.

[0038] In some embodiments, it includes:

[0039] Step S110: Measure the component content in the current gas, and calculate the calorific value of the current gas according to the standard calorific values of each component.

[0040] For example, first, the volume percentages of each combustible component (such as H2, CO, CH4, C3H8, etc.) in the gas are detected in real time through an on-line gas analyzer (such as an infrared spectrometer or a gas chromatograph) installed on the gas pipeline.

[0041] Then, weighted calorific value calculation is performed according to the detected volume percentages and the standard calorific values corresponding to each component.

[0042]

[0043] where C i is the volume percentage (%) of the i-th component, is the calorific value of the i-th component under standard conditions (e.g., H2 = 10.8 MJ / Nm 3 , CO = 12.6 MJ / Nm 3 , CH4 = 35.8 MJ / Nm 3 ).

[0044] Example: If the detected gas components are: H2 = 50%, CO = 30%, CH4 = 5%, then:

[0045] Q = (0.5 × 10.8) + (0.3 × 12.6) + (0.05 × 35.8) = 13.09 MJ / Nm 3

[0046] Then perform step S120: Real-time collect the flow value of the current gas entering the heat treatment furnace.

[0047] For example, install a vortex flowmeter or an ultrasonic flowmeter on the main gas pipe or branch pipe to real-time collect the gas volume flow (Nm 3 / h).

[0048] Then perform step S130: Determine the theoretically required air volume according to the component content in the current gas and the gas flow value.

[0049] Calculate the theoretically required air volume L0 for complete combustion according to the gas components and flow rate. The oxygen content required for complete combustion of each component (H2, CO, CH4) in the gas components is different.

[0050] For example, determine the air volume required for a unit volume of gas components according to the content of each component in the gas components and the oxygen content required for complete combustion of each component. Then multiply it by the gas flow rate to obtain the theoretically required air volume.

[0051] S200: Collect the flue gas components in each flue gas pipeline of the heat treatment furnace and calculate the actual supplied air volume.

[0052] For example, calculate based on the O2 content in the flue gas components, or obtain the actual supplied air volume by correcting based on the O2 content in the flue gas components combined with the CO content.

[0053] S300: Determine the air consumption coefficient μ according to the theoretically required air volume and the actual supplied air volume.

[0054] S400: Compare the air consumption coefficient μ with the target control value. If the two do not match, adjust at least one of the gas pressure value, gas flow value, combustion-supporting air pressure value, and combustion-supporting air flow until the flue gas components meet the standards.

[0055] The target control value is the ideal air consumption coefficient μ obtained according to the actual situation of the heat treatment furnace combustion.

[0056] ① When the air consumption coefficient μ is greater than the target control value, the system is defined as excessive air supply. At this time, the air intake needs to be reduced to achieve the purpose of reducing the air consumption coefficient.

[0057] ② When the air consumption coefficient μ is less than the target control value, the system determines that the air supply is insufficient. At this time, the air intake needs to be increased to achieve the purpose of increasing the air consumption coefficient.

[0058] The air consumption coefficient is crucial in the process of heat treatment furnace combustion, which is reflected in the following aspects:

[0059] 1. When the value of μ is too large, the concentration of NOx in the waste gas is high, and the environmental pollution is serious.

[0060] Among the atmospheric pollutants caused by combustion, the most harmful and difficult to treat is nitrogen oxides, and its main components are: NO, N2O, NO2, N2O3, N2O4, N2O5, etc. These nitrogen compounds are collectively called NO x . Through scientific research, in NO x , NO accounts for more than 90%, NO2 accounts for more than 5%, and the sum of other nitrogen compounds is less than 5%. Referring to Figure 1 , scientific research shows that the most harmful to humans, animals and plants are mainly NO and NO2, and other nitrogen compounds have less impact on ecological damage.

[0061] According to the theory of Soviet scientist Zel'dovich, the formation rate of nitrogen compounds satisfies the following formula:

[0062]

[0063] It can be seen from the formula that nitrogen compounds are related to nitrogen (N2), oxygen (O2), time (t), and temperature (T), which also indicates that the formation rate of nitrogen compounds is proportional to the square root of oxygen (O2) and satisfies the Arrhenius law with temperature (T).

[0064] In the combustion of gas heating, oxygen mainly comes from the combustion-supporting air, nitrogen mainly comes from gas and air, and the formed NOx is mainly thermal type, accompanied by a small amount of prompt type and fuel type.

[0065] Scientific research shows that: Although the formation of NO x is closely related to O2, it is not generated during the combustion process, but is closely related to the oxygen concentration in the high-temperature waste gas after combustion. In other words: The higher the oxygen concentration in the waste gas, the more NO x is formed. Therefore, controlling the air consumption coefficient in the furnace combustion process and reducing the free oxygen in the waste gas can greatly reduce NO xeffective way.

[0066] According to analysis, after the optimization control of gas heating combustion furnaces in steel plants, NO x It could drop by more than 30%.

[0067] 2. The μ value is too large, resulting in large energy waste and carbon emissions

[0068] 3. The μ value is too large, the oxidation and burning of the billet in the heating furnace is large, the yield rate is low, and the surface quality is poor

[0069] During the heating process of the steel billet, the temperature and atmosphere in the furnace must be properly adjusted. If the operation is improper, defects such as oxidation, decarburization, overheating, and overburning will occur. These defects will affect the heating quality of the steel billet and even cause waste.

[0070] When the steel billet is heated in a high-temperature furnace, the surface layer of the steel billet is oxidized due to the large amount of O2, CO2, H2O, etc. contained in the furnace gas. Each time it is heated, 0.5% to 1% of the metal is burned due to oxidation.

[0071] Oxidation not only causes direct loss of steel billets, but also the iron oxide scale produced after oxidation accumulates in the furnace, especially at the bottom of the furnace, which also corrodes the refractory materials and affects the life of the furnace body.

[0072] Reference Figure 4 The iron oxide scale will also affect the quality of steel. It will be pressed on the surface of the steel during the rolling process, which will cause pitting on the surface and affect the surface quality of the steel. If the oxide layer is too deep, the subcutaneous bubbles of the steel billet will be exposed and rolled into waste.

[0073] The oxidation process is the result of a chemical reaction between the oxidizing gases (O2, CO2, H2O, SO2) in the furnace gas and the iron on the surface of the steel. The following is the reaction process of oxygen and iron at high temperature:

[0074] Fe+1 / 2O2=FeO

[0075] 3Fe+2O2=Fe3O4

[0076] 2Fe3O4+1 / 2O2=3Fe2O3

[0077] 4. The μ value is too large, the exhaust gas volume of the hot blast furnace is large, and the temperature of the vault and checker bricks is low, resulting in low hot blast temperature

[0078] 5. The μ value is too large, and the concentration of SO3 and H2SO4 in the exhaust gas increases, resulting in serious low-temperature corrosion of the flue equipment, especially the low-temperature air preheater and gas heater of the power plant boiler.

[0079] The gas pressure value, gas flow value, combustion air pressure value and combustion air flow value will all affect the air consumption coefficient, therefore, at least one of them is adjusted until the flue gas composition meets the standard. Accordingly, the air consumption coefficient can reach the target control value.

[0080] That is, after the controller sets the target air coefficient, the analysis of the flue gas will constantly feed back the current combustion status, and the combustion status will be fed back to the adjustable parameters (gas calorific value, gas pressure, flow, combustion air flow, pressure, etc.) for adjustment to form a closed-loop regulation and control.

[0081] The system adopts a combination of closed-loop and open-loop control, and adds compensation control of gas pressure and gas calorific value interference signals on the basis of closed-loop control, which improves the system's anti-interference ability and increases the system's stability and control accuracy.

[0082] The above-mentioned heat treatment furnace combustion control method realizes accurate control of the heat treatment furnace combustion process through real-time monitoring and intelligent adjustment, improves combustion efficiency, reduces energy consumption, and reduces pollutant emissions. The method is suitable for combustion control of heat treatment furnaces in industrial production and has broad application prospects.

[0083] In some embodiments, during the process of adjusting the flue gas components to meet the standards, if the detected carbon monoxide content is greater than the target carbon monoxide content of the target flue gas components, and the detected oxygen content is less than the target oxygen content of the target flue gas components, the combustion air pressure value and / or the combustion air flow rate are increased for adjustment until the flue gas components meet the standards.

[0084] In this case, the air consumption coefficient μ is less than the target control value, and the air supply is insufficient. According to the specific flue gas composition, the combustion air parameters are adjusted in a targeted manner to ensure sufficient combustion. Moreover, it responds quickly and can adjust the combustion parameters in time, quickly respond to changes in the combustion process, and improve system stability.

[0085] In some specific embodiments, in the process of adjusting the flue gas composition to meet the standard, when the oxygen detection content is less than 1% and the carbon monoxide detection content is greater than 1000ppm, the gas pressure and gas flow rate are first reduced, and then the combustion air pressure or combustion air flow rate is increased to reduce the calorific value of the gas within the controllable range of the calorific value of the gas, and adjust the CO content in the flue gas to less than 1000ppm.

[0086] In this embodiment, a refined control strategy is adopted, and under certain conditions, a refined adjustment strategy is adopted to ensure the stability and safety of the combustion process. By adjusting the parameters of coal gas and combustion-supporting air, the combustion process is optimized and the combustion efficiency is improved.

[0087] In some embodiments, during the process of adjusting the flue gas components to meet the standards, if the detected carbon monoxide content is less than the target carbon monoxide content of the target flue gas components, and the detected oxygen content is greater than the target oxygen content of the target flue gas components, the pressure value and / or the flow rate of the combustion-supporting air are reduced for adjustment until the flue gas components meet the standards.

[0088] In this case, the air consumption coefficient μ is greater than the target control value, and the air supply is excessive. This embodiment is a reverse adjustment. According to the reverse change of the flue gas components, targeted adjustment is carried out to ensure the stability and safety of the combustion process. By optimizing the parameters of the combustion-supporting air, energy consumption is reduced and combustion efficiency is improved.

[0089] In some specific embodiments, during the process of adjusting the flue gas components to meet the standards, when the detected oxygen content > 3% and the detected carbon monoxide content < 100 ppm, first increase the pressure and flow rate of the gas, then increase the pressure or flow rate of the combustion-supporting air, and reduce the calorific value of the gas within the adjustable range of the calorific value of the gas, and adjust until the CO content in the flue gas is less than 1000 ppm.

[0090] In this embodiment, according to the actual situation under specific conditions, a refined adjustment strategy is adopted to ensure the stability and safety of the combustion process. By adjusting the parameters of the gas and the combustion-supporting air, the combustion process is optimized and the combustion efficiency is improved.

[0091] In some embodiments, during the process of adjusting the flue gas components to meet the standards, when the detected oxygen content and the detected carbon monoxide content in the flue gas components do not meet the standards, at least the pressure value and the flow rate of the combustion-supporting air are adjusted simultaneously. The adjustment process includes:

[0092] According to the mapping relationship among the rotational speed of the combustion-supporting fan, the pressure value of the combustion-supporting air, and the flow rate of the combustion-supporting air, the rotational speed of the combustion-supporting fan is adjusted.

[0093] For heat treatment furnaces such as industrial furnaces, due to the continuous change of gas and air parameters, the air consumption coefficient may be seriously too high, which greatly increases the combustion-supporting air volume. The increase in the combustion-supporting air volume not only wastes energy but also increases the power consumption of the blower and induced draft fan. In addition, due to the surplus pressure of the fan, the air duct valve is in a deep throttling state for a long time. Due to these two reasons, changing the operation of the fixed-speed fan to variable-speed operation can save a large amount of electric energy.

[0094] According to the fan similarity ratio law, when the rotational speed of the fan changes from n1 to n2, the change relationships of Q, H, and P are:

[0095] Q2 = (n2 / n1)Q1

[0096] H2 = (n2 / n1) 2 H1

[0097] P2 = (n2 / n1) 3 P1

[0098] Q - Air volume; H - Air pressure; P - Fan power

[0099] It can be seen from the formula that the fan flow rate is directly proportional to the first power of the rotational speed change, the pressure is directly proportional to the second power of the rotational speed change, and the shaft power is directly proportional to the third power of the rotational speed change. Therefore, there is a corresponding relationship between the fan flow rate, pressure, and power and the rotational speed. As Figure 2 shown:

[0100] Thus, it can be seen that controlling the air consumption coefficient during the combustion of industrial furnaces is to reduce the fan rotational speed and the combustion-supporting air volume, so that the air consumption coefficient returns to the posture of μ = 1.0, achieving the purpose of saving electricity for the fan.

[0101] In some embodiments, it further includes: controlling the pressure of the heat treatment furnace at 0 - 10 Pa.

[0102] First of all, the furnace needs to have a slightly positive pressure or slightly negative pressure environment to ensure the balance of furnace gas. Excessive furnace pressure will cause the furnace gas to overflow, and too low furnace pressure will suck in excessive cold air, both of which will cause waste of fuel and environmental pollution. As Figure 3 shown,[[]]

[0103] It can be seen from the figure that the furnace pressure of the furnace has a great influence on fuel consumption. The furnace pressure should be precisely controlled during the operation of the furnace. Therefore, furnace pressure control can prevent the following situations from occurring:

[0104] ① Excessive furnace pressure will cause too much gas to escape from the furnace body, resulting in a large loss of heat, waste of fuel, and at the same time having a very bad impact on the working environment.

[0105] ② Excessive furnace pressure will cause the high-temperature furnace gas to burn and damage the furnace door and furnace frame. Only a small amount of furnace gas will overflow during normal operation. If excessive flue gas overflows, long-term burning will damage the furnace door and furnace frame.

[0106] ③ Too low furnace pressure will cause cold air to be sucked in. For a heating furnace, it will also increase the oxidation and burning loss of the steel billet, and at the same time reduce the furnace temperature and increase the energy consumption of the furnace.

[0107] In some specific embodiments, the method of controlling the furnace chamber pressure of the heat treatment furnace at 0 - 10 Pa includes:

[0108] When the furnace chamber pressure is too high, increase the frequency of the exhaust fan.

[0109] When the furnace chamber pressure is too low, reduce the frequency of the exhaust fan.

[0110] The present application also provides a control system for the combustion of a heat treatment furnace, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the above-mentioned control method for the combustion of the heat treatment furnace are implemented.

[0111] In a specific control system, as Figure 5 shown. It has the following characteristics:

[0112] ① When the air consumption coefficient μ detected by the analyzer is greater than the set value of the control system, the system is determined to have excessive air supply. At this time, the control system immediately issues a wind reduction command to reduce the air intake volume, thereby achieving the purpose of reducing the air consumption coefficient;

[0113] ② When the air consumption coefficient μ detected by the analyzer is less than the set value of the control system, the system determines that the air supply is insufficient. At this time, the control system immediately issues a wind increase command to increase the air intake volume, thereby achieving the purpose of increasing the air consumption coefficient;

[0114] ③ The system adopts a combination of closed-loop and open-loop methods, adding compensation control for the interference signals of gas pressure and gas calorific value on the basis of closed-loop control, improving the anti-interference ability of the system, and increasing the stability and control accuracy of the system.

[0115] The present application also provides a computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, the control method for the combustion of the heat treatment furnace as described above is implemented.

[0116] In the above technical solution of the present invention, the above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A control method for the combustion of a heat treatment furnace, characterized in that, It includes the following steps: Obtain the calorific value and gas flow value of the current gas, and calculate the theoretically required air volume; Collect the flue gas components in each flue gas pipeline of the heat treatment furnace, and calculate the actually supplied air volume; Determine the air consumption coefficient μ according to the theoretically required air volume and the actually supplied air volume; Compare the air consumption coefficient μ with the target control value; If they do not match, adjust at least one of the gas pressure value, gas flow value, combustion-supporting air pressure value, and combustion-supporting air flow until the flue gas components meet the standards.

2. The control method for the combustion of a heat treatment furnace according to claim 1, wherein During the process of adjusting the flue gas components to meet the standards, if the detected carbon monoxide content is greater than the carbon monoxide target content of the target flue gas components, and the detected oxygen content is less than the oxygen target content of the target flue gas components; then increase the combustion-supporting air pressure value and / or combustion-supporting air flow for adjustment until the flue gas components meet the standards.

3. The control method for the combustion of the heat treatment furnace according to claim 2, characterized in that, During the process of adjusting the flue gas components to meet the standards, when the detected oxygen content < 1% and the detected carbon monoxide content > 1000 ppm, first reduce the pressure and gas flow of the gas, then increase the combustion-supporting air pressure or combustion-supporting air flow, and reduce the calorific value of the gas within the adjustable range of the gas calorific value until the CO content in the flue gas is less than 1000 ppm.

4. The control method for the combustion of a heat treatment furnace according to claim 1, characterized in that, During the process of adjusting the flue gas components to meet the standards, if the detected carbon monoxide content is less than the carbon monoxide target content of the target flue gas components, and the detected oxygen content is greater than the oxygen target content of the target flue gas components; then reduce the combustion-supporting air pressure value and / or combustion-supporting air flow for adjustment until the flue gas components meet the standards.

5. The control method for the combustion of the heat treatment furnace according to claim 4, characterized in that, During the process of adjusting the flue gas components to meet the standards, when the detected oxygen content > 3% and the detected carbon monoxide content < 100 ppm, first increase the pressure and gas flow of the gas, then increase the combustion-supporting air pressure or combustion-supporting air flow, and reduce the calorific value of the gas within the adjustable range of the gas calorific value until the CO content in the flue gas is less than 1000 ppm.

6. The control method for the combustion of the heat treatment furnace according to claim 1, characterized in that, During the process of adjusting the flue gas components to meet the standards, when the detected oxygen content and carbon monoxide content in the flue gas components do not meet the standards, at least adjust the combustion-supporting air pressure value and combustion-supporting air flow simultaneously. The adjustment process includes: Adjust the rotation speed of the combustion-supporting fan according to the mapping relationship among the rotation speed of the combustion-supporting fan, the combustion-supporting air pressure value, and the combustion-supporting air flow.

7. The control method for the combustion of a heat treatment furnace according to claim 1, characterized in that The step of obtaining the calorific value and gas flow value of the current gas and calculating the theoretically required air volume includes: Measure the component content in the current gas, and calculate the calorific value of the current gas according to the standard calorific value of each component; Real-time collect the flow value of the current gas entering the heat treatment furnace; Determine the theoretically required air volume according to the component content and gas flow value in the current gas.

8. The control method for the combustion of a heat treatment furnace according to claim 7, characterized in that, The determination method of the target control value includes: Determine the target control value according to the theoretically required air volume and the historical combustion efficiency value of the heat treatment furnace.

9. A control system for the combustion of a heat treatment furnace, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the control method for heat treatment furnace combustion according to any one of claims 1 to 8.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the control method for heat treatment furnace combustion according to any one of claims 1 to 8.

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