Mixed gas stability control method, device and system

Abstract

The embodiment of the invention provides a mixed gas stability control method, device and system, and relates to the technical field of gas mixing, and the method comprises the following steps: determining the mixing pressure of a heating furnace in the mixed gas stability control system, determining a high-flow regulating valve and a low-flow regulating valve from a blast furnace gas pressure regulating valve and a coke oven gas pressure regulating valve, determining the after-machine pressure in the mixed gas stability control system, and adjusting a blast furnace gas high-low pressure backflow adjusting valve, a coke oven gas high-low pressure backflow adjusting valve and a high flow adjusting valve based on the after-machine pressure, the mixing pressure and the set pressure; determining a first real-time calorific value of a blast furnace gas control system, a second real-time calorific value of a coke oven gas control system and a mixed calorific value of a mixed gas stability control system, and adjusting a low-flow adjusting valve based on the first real-time calorific value, the second real-time calorific value, the mixed calorific value and a set calorific value, the pressure and heat value of the mixed gas can be accurately controlled.

Description

Technical Field

[0001] The present invention relates to the field of coal gas mixing technology, and in particular to a method, device and system for stabilizing and controlling mixed coal gas. Background Art

[0002] Under normal production conditions, the supply and demand of mixed gas will change randomly. For example, if the product type, process requirements, material conditions, etc. of the gas user change, the demand for mixed gas in the heating furnace will change at any time, which will cause a large change in the gas flow and pressure, and bring huge fluctuations to the calorific value of the mixed gas in the heating furnace, directly causing a large fluctuation in the temperature of the heating furnace, affecting the normal production of users. The mixed gas mixing and pressurization system is a complex system with multiple variables, time-varying, nonlinear, and coupling.

[0003] Traditional methods usually use manual control, which has disadvantages such as high labor intensity, large fluctuations in user mixed gas pressure, and low gas calorific value control accuracy. Summary of the invention

[0004] The object of the present invention is to provide a method, device and system for stabilizing control of mixed coal gas, which can improve the accuracy of controlling the calorific value and pressure of the mixed coal gas.

[0005] In order to achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:

[0006] In a first aspect, an embodiment of the present application provides a mixed gas stabilization control method, which is applied to a controller of a mixed gas stabilization control system, wherein the mixed gas stabilization control system further includes a blast furnace gas control system and a coke oven gas control system, wherein the controller is respectively connected to the blast furnace gas control system and the coke oven gas control system in communication, wherein the blast furnace gas control system includes a blast furnace gas high- and low-pressure reflux regulating valve and a blast furnace gas pressure regulating valve, wherein the coke oven gas control system includes a coke oven gas high- and low-pressure reflux regulating valve and a coke oven gas pressure regulating valve, wherein the blast furnace gas high- and low-pressure reflux regulating valve is arranged before the blast furnace gas pressure regulating valve, and the coke oven gas high- and low-pressure reflux regulating valve is arranged before the coke oven gas pressure regulating valve, wherein the method includes:

[0007] Determining the mixed pressure of the heating furnace in the mixed gas stabilization control system;

[0008] Determine a high flow regulating valve and a low flow regulating valve from the blast furnace gas pressure regulating valve and the coke oven gas pressure regulating valve;

[0009] Determining the after-engine pressure in the mixed gas stabilization control system;

[0010] Based on the after-machine pressure, the mixed pressure and the set pressure, the blast furnace gas high and low pressure return regulating valve, the coke oven gas high and low pressure return regulating valve and the high flow regulating valve are regulated;

[0011] Determine the first real-time calorific value of the blast furnace gas control system, the second real-time calorific value of the coke oven gas control system, and the mixed calorific value of the mixed gas stabilization control system;

[0012] The low flow regulating valve is adjusted based on the first real-time heating value, the second real-time heating value, the mixed heating value and the set heating value.

[0013] In an optional embodiment, the step of adjusting the blast furnace gas high and low pressure return regulating valve, the coke oven gas high and low pressure return regulating valve and the high flow regulating valve based on the after-machine pressure, the mixed pressure and the set pressure comprises:

[0014] Based on the after-machine pressure and the set pressure, the blast furnace gas high and low pressure return regulating valve and / or the coke oven gas high and low pressure return regulating valve are adjusted;

[0015] The high flow regulating valve is regulated based on the mixed pressure and the set pressure.

[0016] In an optional embodiment, the step of adjusting the blast furnace gas high and low pressure return regulating valve and / or the coke oven gas high and low pressure return regulating valve based on the after-machine pressure and the set pressure includes:

[0017] Determine the first after-machine pressure of the blast furnace gas control system;

[0018] Calculating a first difference between the first after-machine pressure and the set pressure;

[0019] comparing the first difference with each first preset range;

[0020] Acquire a first target preset range matching the first difference value from each of the first preset ranges, wherein the first preset range indicates a pressure difference range between the after-machine pressure and the set pressure;

[0021] Determine the opening and closing degree and duration corresponding to the first target preset range;

[0022] Adjusting the blast furnace gas high and low pressure reflux regulating valve based on the opening and closing degree corresponding to the first target preset range and the duration;

[0023] Determining a second after-machine pressure of the coke oven gas control system;

[0024] Calculating a second difference between the second after-machine pressure and the set pressure;

[0025] comparing the second difference with each first preset range;

[0026] Acquire a second target preset range matching the second difference from each of the first preset ranges;

[0027] Determine the opening and closing degree and duration corresponding to the second target preset range;

[0028] The coke oven gas high and low pressure reflux regulating valve is adjusted based on the opening and closing degree corresponding to the second target preset range and the duration.

[0029] In an optional embodiment, the step of adjusting the high flow control valve based on the mixed pressure and the set pressure includes:

[0030] calculating a third difference between the mixed pressure and the set pressure;

[0031] Acquire a third target preset range matching the third difference value from each second preset range, wherein the second preset range indicates a pressure difference range of a mixed pressure setting pressure;

[0032] Determine the opening and closing degree and duration corresponding to the third target preset range;

[0033] The high flow control valve is adjusted based on the opening and closing degree corresponding to the third target preset range and the duration.

[0034] In an optional embodiment, the step of adjusting the low flow regulating valve based on the first real-time calorific value, the second real-time calorific value, the mixed calorific value and the set calorific value includes:

[0035] adjusting the low flow regulating valve based on the first real-time calorific value, the second real-time calorific value and the mixed calorific value;

[0036] The low flow regulating valve is adjusted based on the mixed heating value and the set heating value.

[0037] In an optional embodiment, when the low flow is blast furnace gas, the step of adjusting the low flow regulating valve based on the first real-time calorific value, the second real-time calorific value and the mixed calorific value includes:

[0038] Calculating a fourth difference between the mixed calorific value and the second real-time calorific value;

[0039] calculating a fifth difference between the first real-time thermal value and the second real-time thermal value;

[0040] Calculating a ratio of the fourth difference to the fifth difference as the low flow ratio value;

[0041] The low flow regulating valve is adjusted based on the low flow ratio value.

[0042] In an optional embodiment, the step of adjusting the low flow regulating valve based on the mixed calorific value and the set calorific value includes:

[0043] calculating a sixth difference between the mixed calorific value and the set calorific value;

[0044] Acquire a fourth target preset range matching the sixth difference value from each third preset range, wherein the third preset range indicates a calorific value difference range between the mixed calorific value and the set calorific value;

[0045] Determine the opening and closing degree and duration corresponding to the fourth target preset range;

[0046] The low flow control valve is adjusted based on the opening and closing degree corresponding to the fourth target preset range and the duration.

[0047] In an optional embodiment, the method comprises:

[0048] Inputting the mixed pressure, the after-machine pressure, the first real-time calorific value, the second real-time calorific value, the set calorific value and the set pressure into the trained mixed gas stability model;

[0049] Determine the adjustment of the blast furnace gas high and low pressure return regulating valve, the coke oven gas high and low pressure return regulating valve, the high flow regulating valve and the adjustment amount of the low flow regulating valve output by the mixed gas stabilization model;

[0050] The blast furnace gas high and low pressure return regulating valve, the coke oven gas high and low pressure return regulating valve, the high flow regulating valve and the low flow regulating valve are regulated based on the regulation amount.

[0051] In a second aspect, an embodiment of the present application provides a mixed gas stabilization control device, which is applied to a mixed gas stabilization control system, wherein the mixed gas stabilization control system further includes a blast furnace gas control system and a coke oven gas control system, wherein the controller is respectively connected to the blast furnace gas control system and the coke oven gas control system in communication, wherein the blast furnace gas control system includes a blast furnace gas high and low pressure reflux regulating valve and a blast furnace gas pressure regulating valve, wherein the coke oven gas control system includes a coke oven gas high and low pressure reflux regulating valve and a coke oven gas pressure regulating valve, wherein the blast furnace gas high and low pressure reflux regulating valve is arranged before the blast furnace gas pressure regulating valve, and the coke oven gas high and low pressure reflux regulating valve is arranged before the coke oven gas pressure regulating valve, wherein the device includes:

[0052] A determination module is used to determine the mixed pressure of the heating furnace in the mixed gas stable control system; determine a high flow regulating valve and a low flow regulating valve from the blast furnace gas pressure regulating valve and the coke oven gas pressure regulating valve; and determine the after-machine pressure in the mixed gas stable control system;

[0053] A regulating module, for regulating the blast furnace gas high and low pressure return regulating valve, the coke oven gas high and low pressure return regulating valve and the high flow regulating valve based on the after-machine pressure, the mixed pressure and the set pressure;

[0054] The determination module is further used to determine the first real-time calorific value of the blast furnace gas control system, the second real-time calorific value of the coke oven gas control system, and the mixed calorific value of the mixed gas stabilization control system;

[0055] The regulating module is further used to regulate the low flow regulating valve based on the first real-time calorific value, the second real-time calorific value, the mixed calorific value and the set calorific value.

[0056] In a third aspect, an embodiment of the present application provides a mixed gas stabilization control system, including a memory and a controller, wherein the memory stores a computer program, and the controller implements the steps of the mixed gas stabilization control method when executing the computer program.

[0057] This application has the following beneficial effects:

[0058] The present application determines the mixed pressure of the heating furnace in the mixed gas stable control system, determines the high flow regulating valve and the low flow regulating valve from the blast furnace gas pressure regulating valve and the coke oven gas pressure regulating valve, determines the after-machine pressure in the mixed gas stable control system, and adjusts the blast furnace gas high and low pressure return regulating valve, the coke oven gas high and low pressure return regulating valve and the high flow regulating valve based on the after-machine pressure, the mixed pressure and the set pressure, determines the first real-time calorific value of the blast furnace gas control system, the second real-time calorific value of the coke oven gas control system and the mixed calorific value of the mixed gas stable control system, and adjusts the low flow regulating valve based on the first real-time calorific value, the second real-time calorific value, the mixed calorific value and the set calorific value, so as to accurately control the pressure and calorific value of the mixed gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0060] Figure 1 A block diagram of a mixed gas stabilization control system provided by an embodiment of the present invention;

[0061] Figure 2 One of the flow charts of a mixed gas stabilization control method provided by an embodiment of the present invention;

[0062] Figure 3 A schematic diagram of the hardware structure of a mixed gas stabilization control system provided by an embodiment of the present invention;

[0063] Figure 4 A second flow chart of a mixed gas stabilization control method provided by an embodiment of the present invention;

[0064] Figure 5 A third flow chart of a mixed gas stabilization control method provided by an embodiment of the present invention;

[0065] Figure 6 A fourth flow chart of a mixed gas stabilization control method provided by an embodiment of the present invention;

[0066] Figure 7 A fifth flow chart of a mixed gas stabilization control method provided by an embodiment of the present invention;

[0067] Figure 8 A schematic structural diagram of a mixed gas stabilization control device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0068] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0069] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0070] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0071] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0072] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0073] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0074] After extensive research, the inventors found that since the demand for gas in the heating furnace will change at any time, the existing method cannot accurately control the opening of the regulating valve and the time for issuing the opening instruction, resulting in large fluctuations in the pressure and calorific value of the mixed gas in the heating furnace, which will cause large temperature changes in the heating furnace and affect normal production.

[0075] In view of the discovery of the above problems, the present embodiment provides a mixed gas stable control method, device and system, which can determine the mixed pressure of the heating furnace in the mixed gas stable control system, determine the high flow regulating valve and the low flow regulating valve from the blast furnace gas pressure regulating valve and the coke oven gas pressure regulating valve, determine the after-machine pressure in the mixed gas stable control system, and adjust the blast furnace gas high and low pressure return regulating valve, the coke oven gas high and low pressure return regulating valve and the high flow regulating valve based on the after-machine pressure, the mixed pressure and the set pressure, determine the first real-time calorific value of the blast furnace gas control system, the second real-time calorific value of the coke oven gas control system and the mixed calorific value of the mixed gas stable control system, and adjust the low flow regulating valve based on the first real-time calorific value, the second real-time calorific value, the mixed calorific value and the set calorific value, so as to accurately control the pressure and calorific value of the mixed gas. The scheme provided in the present embodiment is elaborated in detail below.

[0076] This embodiment provides a mixed gas stabilization control system that can control a regulating valve.

[0077] Please refer to Figure 1 , Figure 11 is a schematic diagram of the structure of the mixed gas stabilization control system 100 provided in the embodiment of the present application. The mixed gas stabilization control system 100 may also include Figure 1 More or fewer components as shown, or with Figure 1 Different configurations are shown. Figure 1 Each component shown in the figure can be implemented by hardware, software or a combination thereof.

[0078] The mixed gas stabilization control system 100 includes a mixed gas stabilization control device 110 , a memory 120 and a controller 130 .

[0079] The components of the memory 120 and the controller 130 are electrically connected to each other directly or indirectly to realize data transmission or interaction. For example, these components can be electrically connected to each other through one or more communication buses or signal lines. The mixed gas stabilization control device 110 includes at least one software function module that can be stored in the memory 120 in the form of software or firmware or solidified in the operating system (OS) of the mixed gas stabilization control system 100. The controller 130 is used to execute the executable modules stored in the memory 120, such as the software function modules and computer programs included in the mixed gas stabilization control device 110.

[0080] The memory 120 may be, but is not limited to, a random access memory (RAM), a read only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable read-only memory (EEPROM), etc. The memory 120 is used to store a program, and the controller 130 executes the program after receiving an execution instruction.

[0081] Please refer to Figure 2 , Figure 2 For application Figure 1 A flow chart of a mixed gas stabilization control method of the mixed gas stabilization control system 100 is shown, and the method including various steps is described in detail below.

[0082] like Figure 3As shown, it is a schematic diagram of the hardware structure of the mixed gas stable control system. The mixed gas stable control system includes a blast furnace gas control system and a coke oven gas control system. The blast furnace gas control system includes: a blast furnace gas calorific value meter 2, a blast furnace gas compressor 4, a blast furnace gas high and low pressure return regulating valve 6, a pressure gauge after the blast furnace gas machine 8, a blast furnace gas pressure regulating valve 10, a blast furnace gas flow meter 12, a blast furnace gas proportioning pipe 14, and a blast furnace gas proportioning pipe pressure gauge 15. The coke oven gas control system includes: a coke oven gas calorific value meter 1, a coke oven gas compressor 3, a coke oven gas high and low pressure return regulating valve 5, a pressure gauge after the coke oven gas machine 7, a coke oven gas pressure regulating valve 9, a coke oven gas flow meter 11, a coke oven gas proportioning pipe 13, and a coke oven gas proportioning pipe pressure gauge 16. The mixed gas stable control system also includes: a mixed gas pipe 17 , a mixed gas pressure gauge 18 , a mixed gas calorific value meter 19 , and a heating furnace 20 .

[0083] The coke oven gas compressor 3 and the outlet main pipe of the coke oven gas compressor 3 are connected to the pressure gauge 7 installed behind the coke oven gas machine, the inlet and outlet high and low pressure return pipes of the coke oven gas compressor 3 and the high and low pressure return regulating valve 5 of the coke oven gas, the blast furnace gas compressor 4 and the outlet main pipe of the blast furnace gas compressor 4 are connected to the pressure gauge 8 installed behind the blast furnace gas machine, the inlet and outlet high and low pressure return pipes of the blast furnace gas compressor 4 and the high and low pressure return regulating valve 6 of the coke oven gas, which provide stable pressure for the coke oven gas pressure regulating valve 9 and the blast furnace gas proportioning flow regulating valve 10. The opening and closing range of the coke oven gas pressure regulating valve 9 is controlled by the calorific value set by the coke oven gas proportioning pipe pressure gauge 16 or the mixed gas pressure gauge 18, and the coke oven gas enters the mixed gas pipe 17 through the coke oven gas proportioning pipe 13.

[0084] The opening and closing amplitude of the blast furnace gas pressure regulating valve 10 is controlled by the set calorific value set by the mixed gas calorific value meter 19, the coke oven gas calorific value meter 1, the actual calorific value of the blast furnace gas calorific value 2 determined by simulation calculation, the required proportioned blast furnace gas volume calculated by the actual measured value of the coke oven gas flowmeter 11 and the difference between the blast furnace gas flowmeter 12, and is mixed into the mixed gas pipe 17 through the blast furnace gas proportioning pipe 14.

[0085] S201: Determine the mixed pressure of the heating furnace in the mixed gas stabilization control system.

[0086] The mixed pressure of the heating furnace is determined based on the mixed gas pressure gauge 18 in the mixed gas stable control system. The mixed gas pressure gauge 18 is connected to the heating furnace.

[0087] The coal gases in the blast furnace gas control system and the coke oven gas control system are mixed in the heating furnace to obtain mixed coal gas.

[0088] S202: Determine a high flow regulating valve and a low flow regulating valve from the blast furnace gas pressure regulating valve and the coke oven gas pressure regulating valve.

[0089] It should be noted that when the ratio of coke oven gas in the mixed gas in the heating furnace is greater than that of blast furnace gas, the coke oven gas pressure regulating valve is a high-flow regulating valve, and the blast furnace gas pressure regulating valve is a low-flow regulating valve. When the ratio of blast furnace gas in the mixed gas in the heating furnace is greater than that of coke oven gas, the blast furnace gas pressure regulating valve is a high-flow regulating valve, and the coke oven gas pressure regulating valve is a low-flow regulating valve.

[0090] Before blast furnace gas is introduced into the blast furnace gas control system and before coke oven gas is introduced into the pipeline in the coke oven gas control system, the ratio of blast furnace gas and coke oven gas can be determined based on the average calorific value of a certain user and the average value of the daily test calorific value of coke oven gas under the average calorific value and the average value of the daily test of blast furnace gas. The blast furnace gas pressure regulating valve of the blast furnace gas control system is controlled to inject blast furnace gas into the pipeline of the blast furnace gas control system based on the ratio of blast furnace gas. The coke oven gas pressure regulating valve of the coke oven gas control system is controlled to inject coke oven gas into the pipeline of the coke oven gas control system based on the ratio of coke oven gas. Finally, the blast furnace gas and coke oven gas are mixed in the mixed gas pipeline for combustion in the heating furnace.

[0091] S203: Determine the after-engine pressure in the mixed gas stabilization control system.

[0092] The blast furnace gas control system includes a blast furnace gas calorific value meter 2, a blast furnace gas pressurizer 4, a blast furnace gas high and low pressure reflux regulating valve 6, a blast furnace gas machine rear pressure gauge 8, a blast furnace gas pressure regulating valve 10, a blast furnace gas flow meter 12, a blast furnace gas proportioning pipe 14, and a blast furnace gas proportioning pipe pressure gauge 15. The blast furnace gas calorific value meter 2, the blast furnace gas pressurizer 4, the blast furnace gas machine rear pressure gauge 8, the blast furnace gas pressure regulating valve 10, the blast furnace gas flow meter 12, the blast furnace gas proportioning pipe 14, and the blast furnace gas proportioning pipe pressure gauge 15 are sequentially arranged on the blast furnace gas pipeline of the blast furnace gas control system, and the blast furnace gas high and low pressure reflux regulating valve 6 is arranged between the blast furnace gas calorific value meter 2 and the blast furnace gas machine rear pressure gauge 8, and is used to adjust the machine rear pressure of the blast furnace gas control system.

[0093] The coke oven gas control system includes: a coke oven gas calorific value meter 1, a coke oven gas compressor 3, a coke oven gas high and low pressure return regulating valve 5, a coke oven gas machine rear pressure gauge 7, a coke oven gas pressure regulating valve 9, a coke oven gas flow meter 11, a coke oven gas proportioning pipe 13, and a coke oven gas proportioning pipe pressure gauge 16. The coke oven gas calorific value meter 1, the coke oven gas compressor 3, the coke oven gas machine rear pressure gauge 7, the coke oven gas pressure regulating valve 9, the coke oven gas flow meter 11, the coke oven gas proportioning pipe 13 and the coke oven gas proportioning pipe pressure gauge 16 are sequentially arranged on the coke oven gas pipeline of the coke oven gas control system, and the coke oven gas high and low pressure return regulating valve 5 is arranged between the coke oven gas calorific value meter 1 and the coke oven gas machine rear pressure gauge 7, and is used to adjust the machine rear pressure of the coke oven gas control system.

[0094] The after-machine pressure of the blast furnace gas control system is determined based on the after-machine pressure gauge 8 of the blast furnace gas, and the after-machine pressure of the coke oven gas control system is determined based on the after-machine pressure gauge 7 of the coke oven gas.

[0095] S204: Based on the after-machine pressure, the mixed pressure and the set pressure, the blast furnace gas high and low pressure return regulating valves, the coke oven gas high and low pressure return regulating valves and the high flow regulating valve are adjusted.

[0096] Based on the after-machine pressure and the set pressure, the blast furnace gas high and low pressure reflux regulating valve and / or the coke oven gas high and low pressure reflux regulating valve are adjusted; based on the mixed pressure and the set pressure, the high flow regulating valve is adjusted.

[0097] The pressure of the mixed gas can be stabilized by adjusting the blast furnace gas high and low pressure reflux regulating valves, coke oven gas high and low pressure reflux regulating valves and high flow regulating valves based on the after-machine pressure, mixed pressure and set pressure.

[0098] S205: Determine the first real-time calorific value of the blast furnace gas control system, the second real-time calorific value of the coke oven gas control system, and the mixed calorific value of the mixed gas stabilization control system.

[0099] S206: Adjust the low flow regulating valve based on the first real-time calorific value, the second real-time calorific value, the mixed calorific value and the set calorific value.

[0100] The low flow regulating valve is adjusted based on the first real-time calorific value, the second real-time calorific value and the mixed calorific value. The low flow regulating valve is adjusted based on the mixed calorific value and the set calorific value, so as to stabilize the calorific value of the mixed gas.

[0101] There are many ways to adjust the blast furnace gas high and low pressure return regulating valve and / or the coke oven gas high and low pressure return regulating valve based on the after-machine pressure and the set pressure. In one implementation, Figure 4 As shown, the following steps are included:

[0102] S301: Determine the first after-machine pressure of the blast furnace gas control system.

[0103] S302: Calculate a first difference between the first after-machine pressure and the set pressure.

[0104] S303: Compare the first difference with each first preset range.

[0105] S304: Acquire a first target preset range matching the first difference from each first preset range.

[0106] The first preset range indicates the pressure difference range between the after-machine pressure and the set pressure.

[0107] S305: Determine the opening and closing degree and duration corresponding to the first target preset range.

[0108] S306: Adjust the high and low pressure reflux regulating valves of blast furnace gas based on the opening and closing degrees and durations corresponding to the first target preset range.

[0109] When adjusting the after-machine pressure of the coke oven gas control system: determine the second after-machine pressure of the coke oven gas control system, calculate the second difference between the second after-machine pressure and the set pressure, compare the second difference with each first preset range, obtain the second target preset range matching the second difference from each first preset range, determine the opening and closing degree and duration corresponding to the second target preset range, and adjust the high and low pressure reflux regulating valve of the coke oven gas based on the opening and closing degree and duration corresponding to the second target preset range.

[0110] The demand for mixed gas by the heating furnace will change at any time, which will cause large changes in the flow and pressure of the gas, and bring huge fluctuations to the calorific value of the mixed gas. Therefore, it is necessary to stabilize the pressure behind the coke oven gas and blast furnace gas compressors. The pressure behind the machine is mainly controlled by the high and low pressure return regulating valve, that is, the pressure behind the machine is adjusted by the high and low pressure circuit regulating valve of the coke oven gas and the high and low pressure circuit regulating valve of the blast furnace gas.

[0111] When the amount of mixed gas in the heating furnace increases, the pressure behind the machine will decrease. It is necessary to control the closing percentage and reaction time of the high and low pressure reflux regulating valves according to the change in the pressure reduction rate to reduce the high and low pressure reflux volume and achieve the pressure to quickly reach the standard pressure value; when the amount of mixed gas in the heating furnace decreases, the pressure behind the machine will increase. It is necessary to control the opening percentage and reaction time of the high and low pressure reflux regulating valves according to the change in the pressure increase rate to increase the high and low pressure reflux volume and achieve the pressure to quickly reach the standard pressure value.

[0112] The way to control the pressure after the machine can adopt a hierarchical control method. When the first difference between the first pressure after the machine and the set pressure is 0.5Kpa, 0.5Kpa is compared with each first preset range, wherein each first preset range may include [-0.5Kpa, 0Kpa]∪[0,0.5Kpa], [-1Kpa, -0.5Kpa)∪(0.5Kpa, 1Kpa], [-1.5Kpa, -1Kpa)∪(1Kpa, 1.5Kpa], (-2Kpa, -1.5Kpa]∪[1.5Kpa, 2KPa], each first preset range corresponds to a different opening and closing degree and duration, and the first target preset range matching the first difference is determined from the above-mentioned first preset ranges, wherein [-0.5Kpa, 0]∪ [0,0.5Kpa] is the first target preset range that matches the first difference, and the opening and closing degree and duration corresponding to [-0.5Kpa, 0]∪[0,0.5Kpa] are determined, and the high and low pressure reflux regulating valve of blast furnace gas is adjusted based on the opening and closing degree and duration corresponding to [-0.5Kpa, 0]∪[0,0.5Kpa]. When the first difference matches [-0.5Kpa, 0], the opening degree of the high and low pressure reflux regulating valve of blast furnace gas is determined, and when the first difference matches [0,0.5Kpa], the closing degree of the high and low pressure reflux regulating valve of blast furnace gas is determined. Among them, the opening degree indicates the opening degree of the high and low pressure reflux regulating valve of blast furnace gas. To increase the flow rate of blast furnace gas, the closing degree indicates the closing degree of the high and low pressure reflux regulating valve of blast furnace gas to reduce the flow rate of blast furnace gas.

[0113] Exemplarily, the opening and closing degree and duration corresponding to [-0.5Kpa, 0.5Kpa] are zero, that is, when the first difference is within the range of [-0.5Kpa, 0.5Kpa], the high and low pressure reflux regulating valve of blast furnace gas does not operate. When the first difference is in the range of [-1Kpa, -0.5Kpa)∪(0.5Kpa, 1Kpa], the closing and opening percentages of the high and low pressure reflux regulating valves of blast furnace gas are controlled at 0.1-1%, and the duration is 2-3s; when the first difference is in the range of [-1.5Kpa, -1Kpa)∪(1Kpa, 1.5Kpa], the closing and opening percentages of the high and low pressure reflux regulating valves are controlled at 3.5-6%, and the duration is 4-6s; when the first difference is in the range of (-2Kpa, -1.5Kpa]∪[1.5Kpa, 2KPa], the closing and opening percentages of the high and low pressure reflux regulating valves of blast furnace gas are controlled at 6.1-10%, and the duration is 6-8s.

[0114] When the second difference between the second rear pressure and the set pressure is 0.5 Kpa, 0.5 Kpa is compared with each first preset range, wherein each first preset range may include [-0.5 Kpa, 0.5 Kpa], [-1 Kpa, -0.5 Kpa)∪(0.5 Kpa, 1 Kpa], [-1.5 Kpa, -1 Kpa)∪(1 Kpa, 1.5 Kpa], (-2 Kpa, -1.5 Kpa]∪[1.5 Kpa, 2 KPa], Each first preset range corresponds to a different opening and closing degree and duration. A second target preset range matching the second difference is determined from the above first preset ranges, wherein [-0.5Kpa, 0.5Kpa] is the second target preset range matching the second difference. The opening and closing degree and duration corresponding to [-0.5Kpa, 0.5Kpa] are determined, and the high and low pressure reflux regulating valves of coke oven gas are adjusted based on the opening and closing degree and duration corresponding to [-0.5Kpa, 0.5Kpa].

[0115] Exemplarily, the opening and closing degree and duration corresponding to [-0.5Kpa, 0.5Kpa] are zero, that is, when the second difference is within the range of [-0.5Kpa, 0.5Kpa], the high and low pressure reflux regulating valve of the coke oven gas does not operate. When the second difference is in the range of [-1Kpa, -0.5Kpa)∪(0.5Kpa, 1Kpa], the closing and opening percentages of the high and low pressure return flow regulating valves of coke oven gas are controlled at 0.1-1%, and the duration is 2-3s; when the second difference is in the range of [-1.5Kpa, -1Kpa)∪(1Kpa, 1.5Kpa], the closing and opening percentages of the high and low pressure return flow regulating valves are controlled at 3.5-6%, and the duration is 4-6s; when the second difference is in the range of (-2Kpa, -1.5Kpa]∪[1.5Kpa, 2KPa], the closing and opening percentages of the high and low pressure return flow regulating valves of coke oven gas are controlled at 6.1-10%, and the duration is 6-8s.

[0116] In addition to determining the opening and closing degree of the high and low pressure reflux regulating valve based on the first target preset range or the second target preset range, the flow value of the high and low pressure reflux regulating valve can also be determined based on the first target preset range or the second target preset range. The flow value can be calculated by the following formula: Q=CAsqrt(ΔP / ρ), Q is the flow value, C is the flow coefficient, sqrt is the flow channel area, ΔP is the fluid pressure difference, and ρ is the fluid density.

[0117] Exemplarily, the flow value and duration are determined within the first target preset range, and the high and low pressure return regulating valves are adjusted based on the flow value and duration, thereby adjusting the after-machine pressure.

[0118] The pressure after the machine needs to be 3±0.5KPa higher than the mixed pressure to ensure the operation of the entire mixed gas stable control system.

[0119] There are many ways to adjust the high flow control valve based on the mixed pressure and the set pressure. In one implementation, Figure 5 As shown, the following steps are included:

[0120] S401: Calculate a third difference between the mixed pressure and the set pressure.

[0121] S402: Acquire a third target preset range matching the third difference from each second preset range.

[0122] The second preset range indicates a pressure difference range of the mixed pressure setting pressure.

[0123] S403: Determine the opening and closing degree and duration corresponding to the third target preset range.

[0124] S404: Adjust the high flow control valve based on the opening and closing degree and duration corresponding to the third target preset range.

[0125] The set pressure is the pressure required for normal production by a certain user.

[0126] After the pressure after the machine stabilizes, the mixed gas pressure of the heating furnace is met by determining the opening of the high-flow gas regulating valve. When the mixed gas consumption of the heating furnace increases, the mixed gas pressure, that is, the mixed pressure, will decrease. It is necessary to control the opening percentage and duration of the high-flow gas regulating valve according to the change in the mixed pressure reduction rate to increase the high-flow gas flow and achieve a rapid increase in the mixed pressure to reach the set pressure; when the mixed gas consumption of the heating furnace decreases, the mixed gas pressure, that is, the mixed pressure will increase. It is necessary to control the closing percentage and duration of the high-flow gas regulating valve according to the change in the pressure increase rate to reduce the high-flow gas flow and achieve a rapid pressure reduction to reach the standard pressure value.

[0127] Specifically, the third difference between the mixed pressure and the set pressure is calculated, and the third target preset range corresponding to the third difference is determined, and the opening and closing degree and duration corresponding to the third target preset range are determined, and the high flow control valve is adjusted based on the opening and closing degree and duration corresponding to the third target preset range.

[0128] Each second preset range may include [-0.5Kpa, 0.5Kpa], [-1Kpa, -0.5Kpa)∪(0.5Kpa, 1Kpa], [-1.5Kpa, -1Kpa)∪(1Kpa, 1.5Kpa], (-2Kpa, -1.5Kpa]∪[1.5Kpa, 2KPa], (-2.5Kpa, -2Kpa]∪[2Kpa, 2.5KPa]. When the third difference is within the range of [-0.5Kpa, 0.5Kpa], the high-flow gas regulating valve remains inactive; when the third difference is within the range of [-1Kpa, -0.5Kpa)∪(0.5Kpa, 1Kpa], the percentage of closing degree and opening degree of the high-flow gas regulating valve is controlled at 0. 1-1%, duration 2-3s; when the third difference is in the range of [-1.5Kpa, -1Kpa)∪(1Kpa, 1.5Kpa], the percentage of closing and opening of the high-flow gas regulating valve is controlled at 1-3%, and the duration is 2-3s; when the mixed gas pressure exceeds the set pressure in the range of (-2Kpa, -1.5Kpa]∪[1.5Kpa, 2KPa], the percentage of closing and opening of the high-flow gas regulating valve is controlled at 3.5-6%, and the duration is 4-6s; when the third difference is in the range of (-2.5Kpa, -2Kpa]∪[2Kpa, 2.5KPa], the percentage of closing and opening of the high-flow gas regulating valve is controlled at 6.1-10%, and the duration is 6-8s.

[0129] There are many ways to adjust the low flow control valve based on the first real-time calorific value, the second real-time calorific value and the mixed calorific value. In one implementation, Figure 6 As shown, the following steps are included:

[0130] S501: Calculate a fourth difference between the mixed calorific value and the second real-time calorific value.

[0131] S502: Calculate a fifth difference between the first real-time thermal value and the second real-time thermal value.

[0132] S503: Calculate the ratio of the fourth difference to the fifth difference as a low flow ratio value.

[0133] S504: Regulate the low flow control valve based on the low flow ratio value.

[0134] The low flow ratio value can be calculated by the following formula:

[0135] When the low flow rate is coke oven gas: low flow rate ratio value = (mixed calorific value - first real-time calorific value) / (second real-time calorific value - first real-time calorific value).

[0136] The coke oven gas pressure regulating valve is adjusted based on the low flow ratio value.

[0137] When the low flow rate is blast furnace gas: low flow rate ratio value = (mixed calorific value - second real-time calorific value) / (first real-time calorific value - second real-time calorific value).

[0138] The blast furnace gas pressure regulating valve is adjusted based on the low flow ratio value.

[0139] There are many ways to adjust the low flow control valve based on the mixed calorific value and the set calorific value. In one implementation, Figure 7 As shown, the following steps are included:

[0140] S601: Calculate the sixth difference between the mixed calorific value and the set calorific value.

[0141] S602: Acquire a fourth target preset range matching the sixth difference from each third preset range.

[0142] The third preset range indicates the calorific value difference range between the mixed calorific value and the set calorific value.

[0143] S603: Determine the opening and closing degree and duration corresponding to the fourth target preset range.

[0144] S604: Adjust the low flow control valve based on the opening and closing degree and duration corresponding to the fourth target preset range.

[0145] After the high-flow gas regulating valve is opened, gas flow will appear immediately. The low-flow ratio value is obtained by simulating and calculating the first real-time calorific value detected online by the blast furnace gas calorific value meter and the second real-time calorific value detected online by the coke oven gas calorific value meter and the mixed calorific value. Based on the calculated low-flow ratio value, the opening and duration of the low-flow gas regulating valve are determined to control the low-flow regulating valve.

[0146] The low-flow gas is mixed into the measured mixed gas from the mixing inlet according to the calculated gas flow rate, so that the calorific value of the mixed gas reaches the set calorific value.

[0147] Calculate the sixth difference between the mixed calorific value and the set calorific value, the third preset range may include: [-100 kj / m 3 , 100kj / m 3 ]、[-200kj / m 3 , -100kj / m 3 ]∪[100kj / m 3 , 200kj / m 3 ]、[-400kj / m 3 , -200kj / m 3 ]∪[200kj / m 3 , 400kj / m 3 ]、[-600kj / m 3, -400kj / m 3 ]∪[400kj / m 3 , 600kj / m 3 ], [-800kj / m 3 , -600kj / m 3 ]∪[600kj / m 3 , 800kj / m 3 ], when the sixth difference belongs to [-100kj / m 3 , 100kj / m 3 ], the low flow gas regulating valve remains inactive; when the sixth difference is [-200kj / m 3 , -100kj / m 3 ]∪[100kj / m 3 , 200kj / m 3 ], the percentage of closing and opening of the low-flow gas regulating valve is controlled at 0.1-1%, with an interval of 2-4s; when the sixth difference belongs to [-400kj / m 3 , -200kj / m 3 ]∪[200kj / m 3 , 400kj / m 3 ], the percentage of closing and opening of the low-flow gas regulating valve is controlled at 1.5-3%, with an interval of 3-5s; when the sixth difference belongs to [-600kj / m 3 , -400kj / m 3 ]∪[400kj / m 3 , 600kj / m 3 ], the percentage of closing degree and opening degree of the low-flow gas regulating valve is controlled at 3.5-5%, and the interval time is 4-6s; when the sixth difference belongs to [-800kj / m 3 , -600kj / m 3 ]∪[600kj / m 3 , 800kj / m 3 ], the closing and opening percentages of the low-flow gas regulating valve are controlled at 5.5-10%, with an interval of 5-10s.

[0148] In addition to adjusting the blast furnace gas high and low pressure reflux regulating valves, coke oven gas high and low pressure reflux regulating valves and high flow regulating valves based on the after-machine pressure, mixed pressure and set pressure, and adjusting the low flow regulating valve based on the first real-time calorific value, the second real-time calorific value, the mixed calorific value and the set calorific value, the mixed gas stabilization control method can also input the mixed pressure, after-machine pressure, the first real-time calorific value, the second real-time calorific value, the set calorific value and the set pressure into a trained mixed gas stabilization model; determine the adjustment amount of the blast furnace gas high and low pressure reflux regulating valve, the coke oven gas high and low pressure reflux regulating valve, the high flow regulating valve and the low flow regulating valve output by the mixed gas stabilization model; adjust the blast furnace gas high and low pressure reflux regulating valve, the coke oven gas high and low pressure reflux regulating valve, the high flow regulating valve and the low flow regulating valve based on the adjustment amount.

[0149] The mixed gas stability model is trained based on the rear-end pressure, the mixed pressure, the first real-time calorific value, the second real-time calorific value, the set calorific value and the set calorific value to obtain a trained mixed gas stability model. The input of the trained mixed gas stability model is the rear-end pressure, the mixed pressure, the first real-time calorific value, the second real-time calorific value, the set calorific value and the set calorific value, and the output is the high and low pressure reflux regulating valve of blast furnace gas, the high and low pressure reflux regulating valve of coke oven gas, the high flow regulating valve for regulation, and the opening and closing degree and duration of the low flow regulating valve.

[0150] The after-machine pressure, mixed pressure, first real-time calorific value, second real-time calorific value, set calorific value and set pressure can be set with an associated relationship. There is an associated relationship between the after-machine pressure and the set pressure, there is an associated relationship between the mixed pressure and the set pressure, and there is an associated relationship between the first real-time calorific value, the second real-time calorific value and the set calorific value. The after-machine pressure, mixed pressure, first real-time calorific value, second real-time calorific value, set calorific value and set pressure at different times with associated relationships are used to train the mixed gas stability model, and the after-machine pressure, mixed pressure, first real-time calorific value, second real-time calorific value, set calorific value and set pressure at the current moment are input into the trained gas mixing stability model, and the high and low pressure reflux regulating valves of blast furnace gas, high and low pressure reflux regulating valves of coke oven gas, and high flow regulating valves are adjusted at the current moment, as well as the opening and closing degree and duration of the low flow regulating valve, so as to stabilize the calorific value and mixed pressure of the mixed gas stabilization system, that is, to stabilize the calorific value of the mixed gas system at the set calorific value, and to stabilize the mixed pressure of the mixed gas system at the set pressure.

[0151] Please refer to Figure 8 The present application embodiment also provides a method for applying Figure 1 The mixed gas stabilization control device 110 of the mixed gas stabilization control system 100 includes:

[0152] The determination module 111 is used to determine the mixed pressure of the heating furnace in the mixed gas stable control system; determine the high flow regulating valve and the low flow regulating valve from the blast furnace gas pressure regulating valve and the coke oven gas pressure regulating valve; and determine the after-machine pressure in the mixed gas stable control system;

[0153] A regulating module 112, for regulating the blast furnace gas high and low pressure return regulating valve, the coke oven gas high and low pressure return regulating valve and the high flow regulating valve based on the after-machine pressure, the mixed pressure and the set pressure;

[0154] The determination module 111 is further used to determine the first real-time calorific value of the blast furnace gas control system, the second real-time calorific value of the coke oven gas control system, and the mixed calorific value of the mixed gas stabilization control system;

[0155] The regulating module 112 is further configured to regulate the low flow regulating valve based on the first real-time calorific value, the second real-time calorific value, the mixed calorific value and the set calorific value.

[0156] The present application also provides a mixed gas stabilization control system 100, which includes a controller 130 and a memory 120. The memory 120 stores computer executable instructions, and when the computer executable instructions are executed by the controller 130, the mixed gas stabilization control method is implemented.

[0157] The embodiment of the present application further provides a computer-readable storage medium, wherein the storage medium stores a computer program, and when the computer program is executed by the controller 130, the mixed gas stabilization control method is implemented.

[0158] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to the multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or the flowchart, and the combination of boxes in the block diagram and / or the flowchart can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0159] In addition, each functional module in each embodiment of the present application can be integrated together to form an independent part, or each module can exist separately, or two or more modules can be integrated to form an independent part. If the function is implemented in the form of a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a disk or an optical disk.

[0160] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0161] The above are only various implementations of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A mixed gas stabilization control method, applied to a controller of a mixed gas stabilization control system, characterized in that: The mixed gas stabilization control system further comprises a blast furnace gas control system and a coke oven gas control system, the controller is respectively connected to the blast furnace gas control system and the coke oven gas control system in communication, the blast furnace gas control system comprises a blast furnace gas high and low pressure reflux regulating valve and a blast furnace gas pressure regulating valve, the coke oven gas control system comprises a coke oven gas high and low pressure reflux regulating valve and a coke oven gas pressure regulating valve, the blast furnace gas high and low pressure reflux regulating valve is arranged before the blast furnace gas pressure regulating valve, the coke oven gas high and low pressure reflux regulating valve is arranged before the coke oven gas pressure regulating valve, and the method comprises: Determining the mixed pressure of the heating furnace in the mixed gas stabilization control system; Determine a high flow regulating valve and a low flow regulating valve from the blast furnace gas pressure regulating valve and the coke oven gas pressure regulating valve; Determining the after-engine pressure in the mixed gas stabilization control system; Based on the after-machine pressure, the mixed pressure and the set pressure, the blast furnace gas high and low pressure return regulating valve, the coke oven gas high and low pressure return regulating valve and the high flow regulating valve are regulated; Determine the first real-time calorific value of the blast furnace gas control system, the second real-time calorific value of the coke oven gas control system, and the mixed calorific value of the mixed gas stabilization control system; The low flow regulating valve is adjusted based on the first real-time heating value, the second real-time heating value, the mixed heating value and the set heating value.

2. The method according to claim 1, characterized in that The step of adjusting the blast furnace gas high and low pressure return regulating valve, the coke oven gas high and low pressure return regulating valve and the high flow regulating valve based on the after-machine pressure, the mixed pressure and the set pressure comprises: Based on the after-machine pressure and the set pressure, the blast furnace gas high and low pressure return regulating valve and / or the coke oven gas high and low pressure return regulating valve are adjusted; The high flow regulating valve is regulated based on the mixed pressure and the set pressure.

3. The method according to claim 2, characterized in that The step of adjusting the blast furnace gas high and low pressure return regulating valve and / or the coke oven gas high and low pressure return regulating valve based on the after-machine pressure and the set pressure comprises: Determine the first after-machine pressure of the blast furnace gas control system; Calculating a first difference between the first after-machine pressure and the set pressure; comparing the first difference with each first preset range; Acquire a first target preset range matching the first difference value from each of the first preset ranges, wherein the first preset range indicates a pressure difference range between the after-machine pressure and the set pressure; Determine the opening and closing degree and duration corresponding to the first target preset range; Adjusting the blast furnace gas high and low pressure reflux regulating valve based on the opening and closing degree corresponding to the first target preset range and the duration; Determining a second after-machine pressure of the coke oven gas control system; Calculating a second difference between the second after-machine pressure and the set pressure; comparing the second difference with each first preset range; Acquire a second target preset range matching the second difference from each of the first preset ranges; Determine the opening and closing degree and duration corresponding to the second target preset range; The coke oven gas high and low pressure reflux regulating valve is adjusted based on the opening and closing degree corresponding to the second target preset range and the duration.

4. The method according to claim 2, characterized in that: The step of adjusting the high flow control valve based on the mixed pressure and the set pressure includes: calculating a third difference between the mixed pressure and the set pressure; Acquire a third target preset range matching the third difference value from each second preset range, wherein the second preset range indicates a pressure difference range of a mixed pressure setting pressure; Determine the opening and closing degree and duration corresponding to the third target preset range; The high flow control valve is adjusted based on the opening and closing degree corresponding to the third target preset range and the duration.

5. The method according to claim 1, characterized in that The step of adjusting the low flow regulating valve based on the first real-time calorific value, the second real-time calorific value, the mixed calorific value and the set calorific value comprises: adjusting the low flow regulating valve based on the first real-time calorific value, the second real-time calorific value and the mixed calorific value; The low flow regulating valve is adjusted based on the mixed heating value and the set heating value.

6. The method according to claim 5, characterized in that When the low flow is blast furnace gas, the step of adjusting the low flow regulating valve based on the first real-time calorific value, the second real-time calorific value and the mixed calorific value comprises: Calculating a fourth difference between the mixed calorific value and the second real-time calorific value; calculating a fifth difference between the first real-time thermal value and the second real-time thermal value; Calculating a ratio of the fourth difference to the fifth difference as the low flow ratio value; The low flow regulating valve is adjusted based on the low flow ratio value.

7. The method according to claim 5, characterized in that The step of adjusting the low flow regulating valve based on the mixed calorific value and the set calorific value comprises: calculating a sixth difference between the mixed calorific value and the set calorific value; Acquire a fourth target preset range matching the sixth difference value from each third preset range, wherein the third preset range indicates a calorific value difference range between the mixed calorific value and the set calorific value; Determine the opening and closing degree and duration corresponding to the fourth target preset range; The low flow control valve is adjusted based on the opening and closing degree corresponding to the fourth target preset range and the duration.

8. The method according to claim 1, characterized in that The method comprises: Inputting the mixed pressure, the after-machine pressure, the first real-time calorific value, the second real-time calorific value, the set calorific value and the set pressure into the trained mixed gas stability model; Determine the adjustment of the blast furnace gas high and low pressure return regulating valve, the coke oven gas high and low pressure return regulating valve, the high flow regulating valve and the adjustment amount of the low flow regulating valve output by the mixed gas stabilization model; The blast furnace gas high and low pressure return regulating valve, the coke oven gas high and low pressure return regulating valve, the high flow regulating valve and the low flow regulating valve are regulated based on the regulation amount.

9. A mixed gas stabilization control device, applied to a mixed gas stabilization control system, characterized in that: The mixed gas stable control system also includes a blast furnace gas control system and a coke oven gas control system. The controller is respectively connected to the blast furnace gas control system and the coke oven gas control system in communication. The blast furnace gas control system provides a blast furnace gas high and low pressure return regulating valve and a blast furnace gas pressure regulating valve. The coke oven gas control system provides a coke oven gas high and low pressure return regulating valve and a coke oven gas pressure regulating valve. The blast furnace gas high and low pressure return regulating valve is arranged before the blast furnace gas pressure regulating valve, and the coke oven gas high and low pressure return regulating valve is arranged before the coke oven gas pressure regulating valve. The device includes: A determination module is used to determine the mixed pressure of the heating furnace in the mixed gas stable control system; determine a high flow regulating valve and a low flow regulating valve from the blast furnace gas pressure regulating valve and the coke oven gas pressure regulating valve; and determine the after-machine pressure in the mixed gas stable control system; A regulating module, for regulating the blast furnace gas high and low pressure return regulating valve, the coke oven gas high and low pressure return regulating valve and the high flow regulating valve based on the after-machine pressure, the mixed pressure and the set pressure; The determination module is further used to determine the first real-time calorific value of the blast furnace gas control system, the second real-time calorific value of the coke oven gas control system, and the mixed calorific value of the mixed gas stabilization control system; The regulating module is further used to regulate the low flow regulating valve based on the first real-time calorific value, the second real-time calorific value, the mixed calorific value and the set calorific value.

10. A mixed gas stabilization control system, characterized in that: The method comprises a memory and a controller, wherein the memory stores a computer program, and the controller implements the method according to any one of claims 1 to 8 when executing the computer program.

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