Method, device and system for stabilizing mixed gas

Abstract

The embodiment of the present application provides a mixed coal gas stable control method, device and system, relates to the coal gas mixing technical field, and the method comprises the following steps: determining the mixed pressure of the heating furnace in the mixed coal gas stable control system, determining 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, determining the post-engine pressure in the mixed coal gas stable control system, adjusting the blast furnace gas high-low pressure backflow regulating valve, the coke oven gas high-low pressure backflow regulating valve and the high-flow regulating valve based on the post-engine pressure, the mixed pressure and the set pressure, determining the first real-time calorific value of the blast furnace gas control system and the second real-time calorific value of the coke oven gas control system and the mixed calorific value of the mixed coal gas stable control system, 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, so that the pressure and the calorific value of the mixed coal gas can be accurately controlled.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal gas mixing, in particular to a mixed coal gas stable control method, device and system. BACKGROUND

[0002] Under normal production conditions, the supply and demand of mixed coal gas will randomly change. For example, the change of product types, process requirements and material conditions of the coal gas user, and the change of the demand of the heating furnace for mixed coal gas will randomly occur, which will cause great changes in the flow and pressure of the coal gas, and will bring great fluctuations to the heating value of the mixed coal gas of the heating furnace, directly causing great fluctuations of the temperature of the heating furnace, and affecting the normal production of the user. The mixed coal gas mixing and pressurizing system is a complex system with multiple variables, time variation, nonlinearity and coupling.

[0003] The traditional method usually adopts manual control, which has the disadvantages of high labor intensity, great pressure fluctuation of the mixed coal gas of the user, and low control precision of the coal gas heating value. SUMMARY

[0004] The purpose of the present application is to provide a mixed coal gas stable control method, device and system, which can improve the control precision of the mixed coal gas heating value and pressure.

[0005] In order to achieve the above purpose, the technical scheme adopted by the embodiments of the present application is as follows:

[0006] In a first aspect, the embodiments of the present application provide a mixed coal gas stable control method applied to a controller of a mixed coal gas stable control system, the mixed coal gas stable control system further comprising a blast furnace gas control system and a coke oven gas control system, the controller being in communication connection with the blast furnace gas control system and the coke oven gas control system respectively, the blast furnace gas control system providing a blast furnace gas high-low pressure backflow regulating valve and a blast furnace gas pressure regulating valve, the coke oven gas control system providing a coke oven gas high-low pressure backflow regulating valve and a coke oven gas pressure regulating valve, the blast furnace gas high-low pressure backflow regulating valve being arranged before the blast furnace gas pressure regulating valve, and the coke oven gas high-low pressure backflow regulating valve being arranged before the coke oven gas pressure regulating valve, and the method comprising:

[0007] determining the mixed pressure of a heating furnace in the mixed coal gas stable control system;

[0008] determining 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 post-machine pressure in the mixed coal gas stable control system;

[0010] adjusting the blast furnace gas high-low pressure return regulating valve, the coke oven gas high-low pressure return regulating valve and the high flow regulating valve based on the machine back pressure, the mixed pressure and a set pressure;

[0011] determining a first real-time heat value of the blast furnace gas control system, a second real-time heat value of the coke oven gas control system and a mixed heat value of the mixed gas stable control system;

[0012] adjusting the low flow regulating valve based on the first real-time heat value, the second real-time heat value, the mixed heat value and a set heat value.

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

[0014] adjusting the blast furnace gas high-low pressure return regulating valve and / or the coke oven gas high-low pressure return regulating valve based on the machine back pressure and the set pressure;

[0015] adjusting the high flow regulating valve based on the mixed pressure and the set pressure.

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

[0017] determining a first machine back pressure of the blast furnace gas control system;

[0018] calculating a first difference value between the first machine back pressure and the set pressure;

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

[0020] obtaining 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 a machine back pressure and a set pressure;

[0021] determining an opening-closing degree and a duration corresponding to the first target preset range;

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

[0023] determining a second machine back pressure of the coke oven gas control system;

[0024] calculating a second difference value between the second machine pressure and the set pressure;

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

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

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

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

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

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

[0031] obtaining 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 mixed pressure set pressure;

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

[0033] adjusting the high-flow regulating valve based on the opening-closing degree and the duration corresponding to the third target preset range.

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

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

[0036] adjusting the low-flow regulating valve based on the mixed heat value and the set heat value.

[0037] In an optional embodiment, when the low flow is coke oven gas, the step of adjusting the low-flow regulating valve based on the first real-time heat value, the second real-time heat value, and the mixed heat value comprises:

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

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

[0040] Calculate the ratio of the fourth difference to the fifth difference, and use it as the low flow ratio value;

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

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

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

[0044] Obtain a fourth target preset range that matches the sixth difference from each of the third preset ranges, wherein the third preset range indicates the range of calorific value difference between the mixed calorific value and the set calorific value;

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

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

[0047] In an optional implementation, the method includes:

[0048] The mixing pressure, downstream pressure, first real-time calorific value, second real-time calorific value, set calorific value, and set pressure are input into the trained mixed gas stability model.

[0049] The adjustment amounts 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 stability model are determined.

[0050] The high and low pressure reflux regulating valves for blast furnace gas, coke oven gas, and high flow regulating valve are adjusted based on the aforementioned adjustment amount, as are the low flow regulating valves.

[0051] Secondly, embodiments of this application provide a mixed gas stabilization control device, applied to a mixed gas stabilization control system. The mixed gas stabilization control system further includes a blast furnace gas control system and a coke oven gas control system. The controller is communicatively connected to both the blast furnace gas control system and the coke oven gas control system. The blast furnace gas control system provides 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 provides 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 located before the blast furnace gas pressure regulating valve, and the coke oven gas high- and low-pressure reflux regulating valve is located before the coke oven gas pressure regulating valve. The device includes:

[0052] determining a mixed pressure of a heating furnace in the mixed gas stable control system; determining 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 a post-machine pressure in the mixed gas stable control system;

[0053] adjusting the blast furnace gas high-low pressure backflow regulating valve, the coke oven gas high-low pressure backflow regulating valve and the high flow regulating valve based on the post-machine pressure, the mixed pressure and a set pressure;

[0054] The determining module is further configured to determine a first real-time heat value of the blast furnace gas control system, a second real-time heat value of the coke oven gas control system and a mixed heat value of the mixed gas stable control system.

[0055] The adjusting module is further configured to adjust the low flow regulating valve based on the first real-time heat value, the second real-time heat value, the mixed heat value and a set heat value.

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

[0057] The present application has the following beneficial effects:

[0058] The present application determines a mixed pressure of a heating furnace in the mixed gas stable control system, determines 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, determines a post-machine pressure in the mixed gas stable control system, adjusts the blast furnace gas high-low pressure backflow regulating valve, the coke oven gas high-low pressure backflow regulating valve and the high flow regulating valve based on the post-machine pressure, the mixed pressure and a set pressure, determines a first real-time heat value of the blast furnace gas control system, a second real-time heat value of the coke oven gas control system and a mixed heat value of the mixed gas stable control system, and adjusts the low flow regulating valve based on the first real-time heat value, the second real-time heat value, the mixed heat value and a set heat value, so that the pressure and the heat value of the mixed gas can be accurately controlled. BRIEF DESCRIPTION OF DRAWINGS

[0059] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0060] Figure 1 A block schematic diagram of a mixed coal gas stable control system provided by an embodiment of the present application is shown in FIG. 1.

[0061] Figure 2 A flowchart of a mixed coal gas stable control method provided by an embodiment of the present application is shown in FIG. 2.

[0062] Figure 3 A hardware structure schematic diagram of a mixed coal gas stable control system provided by an embodiment of the present application is shown in FIG. 3.

[0063] Figure 4 A flowchart of a mixed coal gas stable control method provided by an embodiment of the present application is shown in FIG. 4.

[0064] Figure 5 A flowchart of a mixed coal gas stable control method provided by an embodiment of the present application is shown in FIG. 5.

[0065] Figure 6 A flowchart of a mixed coal gas stable control method provided by an embodiment of the present application is shown in FIG. 6.

[0066] Figure 7 A flowchart of a mixed coal gas stable control method provided by an embodiment of the present application is shown in FIG. 7.

[0067] Figure 8 A structure schematic diagram of a mixed coal gas stable control device provided by an embodiment of the present application is shown in FIG. 8. DETAILED DESCRIPTION

[0068] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0069] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative work fall within the scope of protection of the present application.

[0070] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, thus, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0071] In the description of the present application, it should be noted that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0072] In addition, if the terms "first", "second" and the like appear, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0073] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0074] The inventors have found that due to the varying demand for coal gas by the heating furnace, the existing method cannot accurately adjust the opening of the valve and the time at which the opening command is issued, resulting in large fluctuations in the pressure and heat value of the mixed coal gas in the heating furnace, thereby causing large temperature changes in the heating furnace and affecting normal production.

[0075] In view of the above problems, the present embodiment provides a mixed coal gas stable control method, device and system, which can determine the mixed pressure of the heating furnace in the mixed coal 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 post-machine pressure in the mixed coal gas stable control system, adjust the blast furnace gas high-low pressure return regulating valve, the coke oven gas high-low pressure return regulating valve and the high-flow regulating valve based on the post-machine pressure, the mixed pressure and the set pressure, determine the first real-time heat value of the blast furnace gas control system and the second real-time heat value of the coke oven gas control system and the mixed heat value of the mixed coal gas stable control system, and adjust the low-flow regulating valve based on the first real-time heat value, the second real-time heat value, the mixed heat value and the set heat value. The pressure and heat value of the mixed coal gas can be accurately controlled. The scheme provided in the present embodiment will be described in detail below.

[0076] The present embodiment provides a mixed coal gas stable control system which can control the regulating valve.

[0077] Please refer to Figure 1 , Figure 1This is a schematic diagram of the structure of the mixed gas stabilization control system 100 provided in the embodiments of this application. The mixed gas stabilization control system 100 may further include a ratio Figure 1 The more or fewer components shown, or having the same Figure 1 The different configurations shown. Figure 1 The components shown can be implemented using 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 controller 130 are electrically connected directly or indirectly to achieve 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 embedded 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, Random Access Memory (RAM), Read Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), etc. The memory 120 is used to store programs, and the controller 130 executes the programs after receiving execution instructions.

[0081] Please refer to Figure 2 , Figure 2 For application Figure 1 The flowchart of a mixed gas stabilization control method for a mixed gas stabilization control system 100 is shown below, and the method includes each step in detail.

[0082] like Figure 3The diagram shows the hardware structure of a mixed gas stabilization control system. This 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 reflux regulating valve (6), a blast furnace gas compressor downstream 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 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 reflux regulating valve (5), a coke oven gas compressor downstream 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 mixed gas stability 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 its outlet main pipe are connected to a coke oven gas compressor pressure gauge 7, a coke oven gas high and low pressure reflux regulating valve 5 (inlet and outlet high and low pressure reflux pipes of the coke oven gas compressor 3), and a blast furnace gas compressor 4 and its outlet main pipe are connected to a blast furnace gas compressor pressure gauge 8, a blast furnace gas compressor high and low pressure reflux regulating valve 6 (inlet and outlet high and low pressure reflux pipes of the blast furnace gas compressor 4), providing 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. Coke oven gas enters the mixed gas pipe 17 through the coke oven gas proportioning pipe 13.

[0084] The opening and closing range 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 actual calorific value of the coke oven gas calorific value meter 1 and the blast furnace gas calorific value meter 2, the ratio determined by simulation calculation, the required blast furnace gas volume calculated by the coke oven gas flow meter 11, and the difference between the blast furnace gas flow meter 12 and the actual measured value. The gas is then mixed into the mixed gas pipe 17 through the blast furnace gas proportioning pipe 14.

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

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

[0087] In the blast furnace gas control system and the coke oven gas control system, the gas is mixed in the heating furnace to obtain mixed gas.

[0088] S202: Identify 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.

[0089] It should be noted that when the proportion of coke oven gas in the mixed gas in the heating furnace is greater than the proportion 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 proportion of blast furnace gas in the mixed gas in the heating furnace is greater than the proportion 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] In the blast furnace gas control system, before the pipeline of the blast furnace gas into the blast furnace gas control system, the proportion of the blast furnace gas and the coke oven gas can be determined based on the average heat value of a certain user and the average value of daily testing of the heat value of the coke oven gas and the average value of daily testing of the blast furnace gas under the average heat value, the blast furnace gas pressure regulating valve of the blast furnace gas control system is controlled to pour the blast furnace gas into the pipeline of the blast furnace gas control system based on the proportion of the blast furnace gas, the coke oven gas pressure regulating valve of the coke oven gas control system is controlled to pour the coke oven gas into the pipeline of the coke oven gas control system based on the proportion of the coke oven gas, and finally the blast furnace gas and the coke oven gas are mixed in the mixed gas pipeline for combustion in the heating furnace.

[0091] S203: Determine the machine rear pressure in the mixed gas stable control system.

[0092] The blast furnace gas control system comprises a blast furnace gas heat value instrument 2, a blast furnace gas pressurizing machine 4, a blast furnace gas high-low pressure backflow 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 heat value 2, the blast furnace gas pressurizing machine 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, the blast furnace gas high-low pressure backflow regulating valve 6 is arranged between the blast furnace gas heat value instrument 2 and the blast furnace gas machine rear pressure gauge 8, and is used for regulating the machine rear pressure of the blast furnace gas control system.

[0093] The coke oven gas control system comprises a coke oven gas heat value instrument 1, a coke oven gas pressurizing machine 3, a coke oven gas high-low pressure backflow 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 heat value 1, the coke oven gas pressurizing machine 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-low pressure backflow regulating valve 5 is arranged between the coke oven gas heat value instrument 1 and the coke oven gas machine rear pressure gauge 7, and is used for regulating the machine rear pressure of the coke oven gas control system.

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

[0095] S204: Adjusting the blast furnace gas high-low pressure backflow regulating valve, the coke oven gas high-low pressure backflow regulating valve and the high flow regulating valve based on the machine back pressure, the mixed pressure and the set pressure.

[0096] Adjusting the blast furnace gas high-low pressure backflow regulating valve and / or the coke oven gas high-low pressure backflow regulating valve based on the machine back pressure and the set pressure, and adjusting the high flow regulating valve based on the mixed pressure and the set pressure.

[0097] Adjusting the blast furnace gas high-low pressure backflow regulating valve, the coke oven gas high-low pressure backflow regulating valve and the high flow regulating valve based on the machine back pressure, the mixed pressure and the set pressure can stabilize the pressure of the mixed gas.

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

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

[0100] Adjusting the low flow regulating valve based on the first real-time heat value, the second real-time heat value and the mixed heat value, and adjusting the low flow regulating valve based on the mixed heat value and the set heat value can stabilize the heat value of the mixed gas.

[0101] There are various implementation manners for adjusting the blast furnace gas high-low pressure backflow regulating valve and / or the coke oven gas high-low pressure backflow regulating valve based on the machine back pressure and the set pressure, in one implementation manner, as shown in Figure 4 The method comprises the following steps:

[0102] S301: Determining the first machine back pressure of the blast furnace gas control system.

[0103] S302: Calculating the first difference between the first machine back pressure and the set pressure.

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

[0105] S304: Obtaining the first target preset range matched with the first difference from each first preset range.

[0106] The first preset range indicates the pressure difference range of the machine back pressure and the set pressure.

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

[0108] S306: Adjust the blast furnace gas high-low pressure reflux regulating valve based on the opening-closing degree and the duration corresponding to the first target preset range.

[0109] When adjusting the post-machine pressure of the coke oven gas control system, the second post-machine pressure of the coke oven gas control system is determined, the second difference between the second post-machine pressure and the set pressure is calculated, the second difference is compared with each first preset range, the second target preset range matched with the second difference is obtained from each first preset range, the opening-closing degree and the duration corresponding to the second target preset range are determined, and the coke oven gas high-low pressure reflux regulating valve is adjusted based on the opening-closing degree and the duration corresponding to the second target preset range.

[0110] The demand of the heating furnace for mixed gas will change at any time, which will cause great changes in the flow and pressure of the gas and huge fluctuations in the calorific value of the mixed gas. Therefore, it is necessary to first stabilize the post-machine pressure of the coke oven gas and the blast furnace gas pressurizing machine, and the post-machine pressure is mainly controlled by the high-low pressure reflux regulating valve, that is, the post-machine pressure is adjusted by the coke oven gas high-low pressure loop regulating valve and the blast furnace gas high-low pressure loop regulating valve.

[0111] When the mixed gas consumption of the heating furnace increases, the post-machine pressure will decrease, and the percentage of the closing degree of the high-low pressure reflux regulating valve and the reaction time need to be controlled according to the pressure decrease speed change to reduce the high-low pressure reflux flow and achieve rapid pressure reaching the standard pressure value; when the mixed gas consumption of the heating furnace decreases, the post-machine pressure will increase, and the percentage of the opening degree of the high-low pressure reflux regulating valve and the reaction time need to be controlled according to the pressure increase speed change to increase the high-low pressure reflux flow and achieve rapid pressure reaching the standard pressure value.

[0112] The control method of the machine rear pressure can adopt a hierarchical control method. When the first machine rear pressure is within a first difference of 0.5 KPa of the set pressure, 0.5 KPa is compared with each first preset range, wherein each first preset range can include [-0.5 KPa, 0 KPa] U [0, 0.5 KPa], [-1 KPa, -0.5 KPa) U (0.5 KPa, 1 KPa], [-1.5 KPa, -1 KPa) U (1 KPa, 1.5 KPa], (-2 KPa, -1.5 KPa] U [1.5 KPa, 2 KPa], each first preset range corresponds to different opening and closing degrees and durations, a first target preset range matching the first difference is determined from each first preset range, wherein [-0.5 KPa, 0] U [0, 0.5 KPa] is the first target preset range matching the first difference, the opening and closing degrees and durations corresponding to [-0.5 KPa, 0] U [0, 0.5 KPa] are determined, and the blast furnace gas high-low pressure reflux regulating valve is adjusted based on the opening and closing degrees and durations corresponding to [-0.5 KPa, 0] U [0, 0.5 KPa]. When the first difference matches [-0.5 KPa, 0], the opening degree of the blast furnace gas high-low pressure reflux regulating valve is determined, and when the first difference matches [0, 0.5 KPa], the closing degree of the blast furnace gas high-low pressure reflux regulating valve is determined. The opening degree indicates the opening degree of the blast furnace gas high-low pressure reflux regulating valve to increase the flow of blast furnace gas, and the closing degree indicates the closing degree of the blast furnace gas high-low pressure reflux regulating valve to reduce the flow of blast furnace gas.

[0113] For example, the opening and closing degrees and durations corresponding to [-0.5 KPa, 0.5 KPa] are zero, that is, when the first difference is within the range of [-0.5 KPa, 0.5 KPa], the blast furnace gas high-low pressure reflux regulating valve does not act. When the first difference is within the range of [-1 KPa, -0.5 KPa) U (0.5 KPa, 1 KPa], the closing degree and opening degree percentage control of the blast furnace gas high-low pressure reflux regulating valve is 0.1-1%, and the duration is 2-3s; when the first difference is within the range of [-1.5 KPa, -1 KPa) U (1 KPa, 1.5 KPa], the closing degree and opening degree percentage control of the blast furnace gas high-low pressure reflux regulating valve is 3.5-6%, and the duration is 4-6s; when the first difference is within the range of (-2 KPa, -1.5 KPa] U [1.5 KPa, 2 KPa], the closing degree and opening degree percentage control of the blast furnace gas high-low pressure reflux regulating valve is 6.1-10%, and the duration is 6-8s.

[0114] When the second machine pressure is 0.5 KPa, the 0.5 KPa is compared with each first preset range, wherein each first preset range can 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 different opening degree and duration, a second target preset range matching the second difference value is determined from each first preset range, wherein [-0.5 KPa, 0.5 KPa] is the second target preset range matching the second difference value, the opening degree and duration corresponding to [-0.5 KPa, 0.5 KPa] are determined, and the coke oven gas high-low pressure reflux regulating valve is adjusted based on the opening degree and duration corresponding to [-0.5 KPa, 0.5 KPa].

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

[0116] In addition to determining the opening degree of the high-low pressure reflux regulating valve based on the first target preset range or the second target preset range, the flow value of the high-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 area, ΔP is the fluid pressure difference, and ρ is the fluid density.

[0117] Exemplarily, the flow value and duration are determined based on the first target preset range, and the high-low pressure reflux regulating valve is adjusted based on the flow value and the duration, so as to adjust the machine pressure.

[0118] The post-machine pressure needs to be provided with a pressure higher than the mixed pressure by 3±0.5 KPa, so as to ensure the operation of the whole mixed gas stable control system.

[0119] Based on the mixed pressure and the set pressure, the high-flow regulating valve is adjusted in various manners. In one manner, as shown in Figure 5 The method comprises the following steps:

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

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

[0122] The second preset range indicates a pressure difference range between the mixed pressure and the set pressure.

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

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

[0125] The set pressure is a pressure required for normal production of a user.

[0126] After the post-machine pressure is stabilized, the determined high-flow gas regulating valve opening degree meets the mixed gas pressure of the heating furnace. When the mixed gas consumption of the heating furnace increases, the mixed gas pressure, i.e., the mixed pressure, will decrease. The high-flow gas regulating valve opening degree percentage and the duration need to be controlled according to the mixed pressure decrease speed change to increase the high-flow gas flow, so as to realize the rapid increase of the mixed pressure to reach the set pressure. When the mixed gas consumption of the heating furnace decreases, the mixed gas pressure, i.e., the mixed pressure, will increase. The high-flow gas regulating valve closing degree percentage and the duration need to be controlled according to the pressure increase speed change to decrease the high-flow gas flow, so as to realize the rapid decrease of the pressure to reach the standard pressure value.

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

[0128] The second preset range can 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 in the range of [-0.5Kpa, 0.5Kpa], the high-flow gas regulating valve remains inaction; when the third difference is in [-1Kpa, -0.5Kpa)∪(0.5Kpa, 1Kpa], the high-flow gas regulating valve is controlled at 0.1-1% of the closing degree and opening degree percentage, and the duration is 2-3s; when the third difference is in the range of [-1.5Kpa, -1Kpa)∪(1Kpa, 1.5KPa], the high-flow gas regulating valve is controlled at 1-3% of the closing degree and opening degree percentage, 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 high-flow gas regulating valve is controlled at 3.5-6% of the closing degree and opening degree percentage, and the duration is 4-6s; when the third difference is in the range of (-2.5Kpa, -2Kpa]∪[2Kpa, 2.5KPa], the high-flow gas regulating valve is controlled at 6.1-10% of the closing degree and opening degree percentage, and the duration is 6-8s.

[0129] Based on the first real-time heat value, the second real-time heat value, and the mixed heat value, the low-flow regulating valve is adjusted in various ways. In one implementation, as shown in Figure 6 the following steps are included:

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

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

[0132] S503: Calculate the ratio of the fourth difference and the fifth difference as the low-flow ratio.

[0133] S504: Adjust the low-flow regulating valve based on the low-flow ratio.

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

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

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

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

[0138] The low flow rate matching value is used to adjust the blast furnace gas pressure regulating valve.

[0139] There are various implementation manners for adjusting the low flow rate regulating valve based on the mixed heat value and the set heat value. In one implementation manner, as shown in Figure 7 The method comprises the following steps:

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

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

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

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

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

[0145] After the high flow rate gas regulating valve is opened, the gas flow rate appears immediately. According to the low flow rate matching value obtained by simulating calculation of the first real-time heat value detected by the blast furnace gas heat value instrument and the second real-time heat value detected by the coke oven gas heat value instrument and the mixed heat value, the opening degree and the duration of the low flow rate gas regulating valve are determined based on the calculated low flow rate matching value, and the low flow rate regulating valve is controlled.

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

[0147] The sixth difference between the mixed heat value and the set heat value is calculated. The third preset range can include: [-100kj / 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, -400 kj / m 3 ] ∪ [400 kj / m 3 , 600 kj / m 3 ], [-800 kj / m 3 , -600 kj / m 3 ] ∪ [600 kj / m 3 , 800 kj / m 3 ], when the sixth difference belongs to [-100 kj / m 3 , 100 kj / m 3 ], the low flow gas regulating valve remains inaction; when the sixth difference belongs to [-200 kj / m 3 , -100 kj / m 3 ] ∪ [100 kj / m 3 , 200 kj / m 3 ], the low flow gas regulating valve closing degree and opening degree percentage control in 0.1-1%, interval time 2-4s; when the sixth difference belongs to [-400 kj / m 3 , -200 kj / m 3 ] ∪ [200 kj / m 3 , 400 kj / m 3 ], the low flow gas regulating valve closing degree and opening degree percentage control in 1.5-3%, interval time 3-5s; when the sixth difference belongs to [-600 kj / m 3 , -400 kj / m 3 ] ∪ [400 kj / m 3 , 600 kj / m 3 ], the low flow gas regulating valve closing degree and opening degree percentage control in 3.5-5%, interval time 4-6s; when the sixth difference belongs to [-800 kj / m 3 , -600 kj / m 3 ] ∪ [600 kj / m 3 , 800 kj / m 3 ], the low flow gas regulating valve closing degree and opening degree percentage control in 5.5-10%, interval time 5-10s.

[0148] The mixed gas stability control method can further input the mixed pressure, the post-combustion pressure, the first real-time heat value, the second real-time heat value, the set heat value, and the set pressure into the trained mixed gas stability model; determine the adjustment amount of the blast furnace gas high-low pressure reflux regulating valve, the coke oven gas high-low pressure reflux regulating valve, the high-flow regulating valve, and the low-flow regulating valve output by the mixed gas stability model; and adjust the blast furnace gas high-low pressure reflux regulating valve, the coke oven gas high-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 post-combustion pressure, the mixed pressure, the first real-time heat value, the second real-time heat value, the set heat value, and the set pressure to obtain the trained mixed gas stability model, the input of the trained mixed gas stability model being the post-combustion pressure, the mixed pressure, the first real-time heat value, the second real-time heat value, the set heat value, and the set pressure, and the output being the adjustment of the blast furnace gas high-low pressure reflux regulating valve, the coke oven gas high-low pressure reflux regulating valve, the high-flow regulating valve, and the opening-closing degree and duration of the low-flow regulating valve.

[0150] The post-combustion pressure, the mixed pressure, the first real-time heat value, the second real-time heat value, the set heat value, and the set pressure can be set to have a correlation relationship, the post-combustion pressure and the set pressure have a correlation relationship, the mixed pressure and the set pressure have a correlation relationship, the first real-time heat value, the second real-time heat value, and the set heat value have a correlation relationship, the post-combustion pressure, the mixed pressure, the first real-time heat value, the second real-time heat value, the set heat value, and the set pressure at different time points having the correlation relationship are used to train the mixed gas stability model, the post-combustion pressure, the mixed pressure, the first real-time heat value, the second real-time heat value, the set heat value, and the set pressure at the current time point are input into the trained mixed gas stability model, and the opening-closing degree and duration of the blast furnace gas high-low pressure reflux regulating valve, the coke oven gas high-low pressure reflux regulating valve, the high-flow regulating valve, and the low-flow regulating valve at the current time point are output, so as to stabilize the heat value and the mixed pressure of the mixed gas stability system, that is, the heat value of the mixed gas system is stabilized at the set heat value, and the mixed pressure of the mixed gas system is stabilized at the set pressure.

[0151] Please refer to Figure 8 The application embodiment further provides a mixed gas stability control system 100. Figure 1 The mixed gas stability control system 100 comprises a mixed gas stability control device 110.

[0152] The determining module 111 is configured to determine a mixed pressure of a 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 a post-machine pressure in the mixed gas stable control system.

[0153] The adjusting module 112 is configured to adjust the blast furnace gas high-low pressure backflow regulating valve, the coke oven gas high-low pressure backflow regulating valve, and the high-flow regulating valve based on the post-machine pressure, the mixed pressure, and a set pressure.

[0154] The determining module 111 is further configured to determine a first real-time calorific value of the blast furnace gas control system, a second real-time calorific value of the coke oven gas control system, and a mixed calorific value of the mixed gas stable control system.

[0155] The adjusting module 112 is further configured to 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 a set calorific value.

[0156] The application further provides a mixed gas stable control system 100, which comprises a controller 130 and a memory 120. The memory 120 stores computer executable instructions, and the computer executable instructions are executed by the controller 130 to implement the mixed gas stable control method.

[0157] The application further provides a computer readable storage medium, which stores a computer program, and the computer program is executed by the controller 130 to implement the mixed gas stable control method.

[0158] In the embodiments of the present disclosure, it should be understood that the disclosed apparatus and method can also be implemented in other manners. The embodiments described above are merely schematic. For example, the flowcharts and block diagrams in the accompanying drawings show the possible implementation architectures, functions and operation of the apparatus, method and computer program product according to the embodiments of the present disclosure. In this regard, each block in the flowcharts and block diagrams can represent a module, a program segment or a part of code, which contains one or more executable instructions for implementing the specified logic function. It should also be noted that, in some alternative implementations, the functions noted in the blocks can occur in a different order from that noted in the accompanying drawings. For example, two consecutive blocks can actually be executed substantially in parallel, and sometimes they can be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and the combination of blocks in the block diagrams and / or flowcharts, can be implemented by a dedicated hardware-based system for implementing the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

[0159] In addition, the various functional modules in the embodiments of the present disclosure can be integrated together to form a separate part, or each module can exist independently, or two or more modules can be integrated to form a separate part. When the functions are realized in the form of software functional modules and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present disclosure can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present disclosure. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various media that can store program codes.

[0160] It is to be noted that, as used in this document, the term "indicia" is intended to encompass any visible or tactile indicia, and the term "indicia" is intended to encompass any visible or tactile indicia. Moreover, the term "indicia" is intended to encompass any visible or tactile indicia. Furthermore, the terms "comprise", "comprises", "comprising", "include", "includes", "including" or any other variation thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0161] The above description is only various embodiments of the present application, and the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, and all such changes or replacements should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A mixed gas stability control method applied to a controller of a mixed gas stability control system, characterized by, The mixed gas stable control system further comprises a blast furnace gas control system and a coke oven gas control system, the controller is in communication connection with the blast furnace gas control system and the coke oven gas control system respectively, the blast furnace gas control system provides a blast furnace gas high-low pressure backflow regulating valve and a blast furnace gas pressure regulating valve, the coke oven gas control system provides a coke oven gas high-low pressure backflow regulating valve and a coke oven gas pressure regulating valve, the blast furnace gas high-low pressure backflow regulating valve is arranged before the blast furnace gas pressure regulating valve, the coke oven gas high-low pressure backflow 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 stable control system; determining 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 post-machine pressure in the mixed gas stable control system; adjusting the blast furnace gas high-low pressure backflow regulating valve, the coke oven gas high-low pressure backflow regulating valve and the high flow regulating valve based on the post-machine pressure, the mixed pressure and the set pressure; determining the first real-time calorific value of the blast furnace gas control system and 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; 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.

2. The method of claim 1, wherein, The step of adjusting the blast furnace gas high-low pressure backflow regulating valve, the coke oven gas high-low pressure backflow regulating valve and the high flow regulating valve based on the post-machine pressure, the mixed pressure and the set pressure comprises: adjusting the blast furnace gas high-low pressure backflow regulating valve and / or the coke oven gas high-low pressure backflow regulating valve based on the post-machine pressure and the set pressure; adjusting the high flow regulating valve based on the mixed pressure and the set pressure.

3. The method of claim 2, wherein, The step of adjusting the blast furnace gas high-low pressure backflow regulating valve and / or the coke oven gas high-low pressure backflow regulating valve based on the post-machine pressure and the set pressure comprises: determining the first post-machine pressure of the blast furnace gas control system; calculating a first difference value between the first post-machine pressure and the set pressure; comparing the first difference value with each first preset range; obtaining a first target preset range matched with the first difference value from each first preset range, wherein the first preset range indicates a pressure difference range between the post-machine pressure and the set pressure; determining the opening-closing degree and the duration corresponding to the first target preset range; adjusting the blast furnace gas high-low pressure backflow regulating valve based on the opening-closing degree corresponding to the first target preset range and the duration; determining the second post-machine pressure of the coke oven gas control system; calculating a second difference value between the second post-machine pressure and the set pressure; comparing the second difference value with each first preset range; obtaining a second target preset range matched with the second difference value from each first preset range; determining the opening-closing degree and the duration corresponding to the second target preset range; Adjust the coke oven gas high-low pressure backflow regulating valve based on the opening-closing degree and the duration corresponding to the second target preset range.

4. The method of claim 2, wherein, The step of adjusting the high-flow regulating valve based on the mixed pressure and the set pressure comprises: calculating a third difference between the mixed pressure and the set pressure; acquiring a third target preset range matching the third difference from each second preset range, wherein the second preset range indicates a pressure difference range of the mixed pressure and the set pressure; determining an opening-closing degree and a duration corresponding to the third target preset range; adjusting the high-flow regulating valve based on the opening-closing degree and the duration corresponding to the third target preset range.

5. The method of claim 1, wherein, The step of adjusting the low-flow regulating valve based on the first real-time heat value, the second real-time heat value, the mixed heat value, and the set heat value comprises: adjusting the low-flow regulating valve based on the first real-time heat value, the second real-time heat value, and the mixed heat value; adjusting the low-flow regulating valve based on the mixed heat value and the set heat value.

6. The method of claim 5, wherein, When the low flow is the coke oven gas, the step of adjusting the low-flow regulating valve based on the first real-time heat value, the second real-time heat value, and the mixed heat value comprises: calculating a fourth difference between the mixed heat value and the second real-time heat value; calculating a fifth difference between the first real-time heat value and the second real-time heat value; calculating a ratio of the fourth difference and the fifth difference as a low-flow ratio value; adjusting the low-flow regulating valve based on the low-flow ratio value.

7. The method of claim 5, wherein, The step of adjusting the low-flow regulating valve based on the mixed heat value and the set heat value comprises: calculating a sixth difference between the mixed heat value and the set heat value; acquiring a fourth target preset range matching the sixth difference from each third preset range, wherein the third preset range indicates a heat value difference range of the mixed heat value and the set heat value; determining an opening-closing degree and a duration corresponding to the fourth target preset range; adjusting the low-flow regulating valve based on the opening-closing degree and the duration corresponding to the fourth target preset range.

8. The method of claim 1, wherein, The method comprises: inputting the mixed pressure, the post-combustion pressure, the first real-time heat value, the second real-time heat value, the set heat value, and the set pressure into the trained mixed gas stabilizing model; determining the adjustment amount of the blast furnace gas high-low pressure backflow regulating valve, the coke oven gas high-low pressure backflow regulating valve, the high-flow regulating valve, and the low-flow regulating valve output by the mixed gas stabilizing model; adjusting the blast furnace gas high-low pressure backflow regulating valve, the coke oven gas high-low pressure backflow regulating valve, the high-flow regulating valve, and the low-flow regulating valve based on the adjustment amount.

9. A mixed gas stabilizing control device applied to a mixed gas stabilizing control system, characterized by, The mixed gas stable control system comprises a controller, and further comprises a blast furnace gas control system and a coke oven gas control system, the controller is in communication connection with the blast furnace gas control system and the coke oven gas control system respectively, the blast furnace gas control system comprises a blast furnace gas high-low pressure backflow regulating valve and a blast furnace gas pressure regulating valve, the coke oven gas control system comprises a coke oven gas high-low pressure backflow regulating valve and a coke oven gas pressure regulating valve, the blast furnace gas high-low pressure backflow regulating valve is arranged before the blast furnace gas pressure regulating valve, the coke oven gas high-low pressure backflow regulating valve is arranged before the coke oven gas pressure regulating valve, and the device comprises: A determination module is configured to determine a mixed pressure of a 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 a post-machine pressure in the mixed gas stable control system. An adjusting module is configured to adjust the blast furnace gas high-low pressure backflow regulating valve, the coke oven gas high-low pressure backflow regulating valve and the high-flow regulating valve based on the post-machine pressure, the mixed pressure and a set pressure. The determination module is further configured to determine a first real-time calorific value of the blast furnace gas control system, a second real-time calorific value of the coke oven gas control system and a mixed calorific value of the mixed gas stable control system. The adjusting module is further configured to 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 a set calorific value.

10. A mixed gas stability control system characterized by comprising: A memory and a controller are comprised, the memory stores a computer program, and the controller realizes the method in any one of claims 1-8 when executing the computer program.

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