Blast furnace gas component measuring method and device and electronic equipment

Abstract

The invention discloses a blast furnace gas component measuring method and device and electronic equipment. The method comprises the following steps: acquiring current operation data of a boiler; calculating the mass of CO and the mass of H2 in the blast furnace gas based on the current operation data and a pre-established energy balance equation and a pre-established material balance equation; based on the blast furnace gas flow and the mass of CO and the mass of H2 in the blast furnace gas, calculating the ratio of CO and the ratio of H2 in the blast furnace gas; and correcting the CO ratio sum and the H2 ratio according to a periodically maintained deviation correction model to obtain a CO target ratio sum and an H2 target ratio. According to the blast furnace gas component measurement scheme provided by the invention, the blast furnace gas components can be accurately and timely detected.

Description

Technical Field

[0001] The present invention relates to the technical field of energy production, and in particular to a method and device for measuring the composition of blast furnace gas, and electronic equipment. Background Art

[0002] Blast furnace gas boiler is a boiler equipment that uses blast furnace gas as fuel. Blast furnace gas is a by-product of blast furnace ironmaking, and its main components include carbon monoxide (CO), carbon dioxide (CO2), nitrogen (N2), hydrogen (H2) and methane (CH4). Using blast furnace gas as fuel can achieve resource utilization, improve energy efficiency and reduce environmental pollution.

[0003] The unstable composition of blast furnace gas has many effects on boiler combustion, including combustion efficiency, safety, operational stability and economic benefits. By introducing blast furnace gas soft measurement, we can effectively deal with the challenges brought by the fluctuation of blast furnace gas composition and ensure the safe and efficient operation of the boiler. Therefore, how to accurately measure the composition of blast furnace gas is an important problem that needs to be solved by technicians in this field. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a method and device for measuring blast furnace gas composition, and electronic equipment, which can solve the problem that the blast furnace gas composition cannot be accurately measured in the prior art.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] An embodiment of the present invention provides a method for measuring blast furnace gas composition, wherein the method comprises:

[0007] Get the current operation data of the boiler;

[0008] Calculate the mass of CO and the mass of H2 in the blast furnace gas based on the current operating data and the pre-established energy balance equation and material balance equation;

[0009] Calculate the CO ratio and the H2 ratio in the blast furnace gas based on the blast furnace gas flow rate, the CO mass and the H2 mass in the blast furnace gas;

[0010] The CO proportion and the H2 proportion are corrected according to a regularly maintained deviation correction model to obtain a CO target proportion and a H2 target proportion.

[0011] Optionally, the energy balance equation is: the product of the blast furnace gas flow rate and the low combustion calorific value of the blast furnace gas is equal to the sum of the thermal power of the steam-water system and each preset heat loss power;

[0012] Among them, the preset heat loss power includes: heat loss power of the wind and smoke system, heat loss power of incombustible materials, heat loss power of slag machinery and other heat loss power.

[0013] Optionally, the thermal power of the steam-water system is calculated as follows:

[0014] Calculate the thermal power of the steam system based on the enthalpy of steam, the enthalpy of feed water and the steam flow rate;

[0015] Calculate the thermal power of the water supply system based on the outlet water temperature, inlet water temperature, specific heat capacity of water and water supply flow rate;

[0016] The sum of the thermal power of the steam system and the thermal power of the water supply system is determined as the thermal power of the steam-water system.

[0017] Optionally, the heat loss power of the air and smoke system is calculated as follows:

[0018] Calculate the difference between flue gas temperature and ambient temperature;

[0019] The product of the difference, the specific heat capacity of the flue gas and the flue gas mass flow rate is determined as the heat loss power of the air-smoke system.

[0020] Optionally, the step of calculating the mass of CO and the mass of H2 in the blast furnace gas based on the current operation data and a pre-established energy balance equation and a material balance equation comprises:

[0021] The consumed oxygen amount is calculated by the air supply of the blower and the oxygen amount in the furnace;

[0022] Determine the total mass of CO and H2 in the blast furnace gas by the amount of oxygen consumed;

[0023] Constructing a first equation related to CO mass and H2 mass through the total mass;

[0024] The low combustion calorific value of blast furnace gas is calculated by the energy balance equation;

[0025] Constructing a second equation related to CO mass and H2 mass through the low combustion calorific value of blast furnace gas, the low calorific value of CO, and the low calorific value of H2;

[0026] By jointly solving the first equation and the second equation, the mass of CO and the mass of H2 in the blast furnace gas can be obtained.

[0027] Optionally, the bias correction model is modified as follows:

[0028] Acquire historical blast furnace gas detection data within a preset time period at a set time interval, wherein the historical blast furnace gas detection data includes: the actual proportion and predicted proportion of CO corresponding to each detection time point, and the actual proportion and predicted proportion of H2 corresponding to each detection time point;

[0029] For each detection time point, calculate the first difference between the corresponding actual CO proportion and the predicted proportion, and the second difference between the actual H2 proportion and the predicted proportion;

[0030] An average value of each of the first differences is determined as a correction value of the CO proportion, and an average value of each of the second differences is determined as a correction value of the H2 proportion.

[0031] The embodiment of the present invention further provides a blast furnace gas composition measuring device, wherein the device comprises:

[0032] The acquisition module is used to obtain the current operation data of the boiler;

[0033] A first calculation module is used to calculate the mass of CO and the mass of H2 in the blast furnace gas based on the current operation data and the pre-established energy balance equation and material balance equation;

[0034] A second calculation module is used to calculate the CO proportion and the H2 proportion in the blast furnace gas based on the blast furnace gas flow rate, the CO mass and the H2 mass in the blast furnace gas;

[0035] The correction module is used to correct the CO proportion and the H2 proportion according to the regularly maintained deviation correction model to obtain the CO target proportion and the H2 target proportion.

[0036] Optionally, the energy balance equation is: the product of the blast furnace gas flow rate and the low combustion calorific value of the blast furnace gas is equal to the sum of the thermal power of the steam-water system and each preset heat loss power;

[0037] Among them, the preset heat loss power includes: heat loss power of the wind and smoke system, heat loss power of incombustible materials, heat loss power of slag machinery and other heat loss power.

[0038] Optionally, the thermal power of the steam-water system is calculated as follows:

[0039] Calculate the thermal power of the steam system based on the enthalpy of steam, the enthalpy of feed water and the steam flow rate;

[0040] Calculate the thermal power of the water supply system based on the outlet water temperature, inlet water temperature, specific heat capacity of water and water supply flow rate;

[0041] The sum of the thermal power of the steam system and the thermal power of the water supply system is determined as the thermal power of the steam-water system.

[0042] Optionally, the heat loss power of the air and smoke system is calculated as follows:

[0043] Calculate the difference between flue gas temperature and ambient temperature;

[0044] The product of the difference, the specific heat capacity of the flue gas and the flue gas mass flow rate is determined as the heat loss power of the air-smoke system.

[0045] Optionally, the first calculation module includes:

[0046] The first submodule is used to calculate the consumed oxygen amount through the air supply of the blower and the oxygen amount in the furnace;

[0047] The second submodule is used to determine the total mass of CO and H2 in the blast furnace gas by the amount of oxygen consumed;

[0048] A third submodule is used to construct a first equation related to CO mass and H2 mass through the total mass;

[0049] The fourth submodule is used to calculate the low combustion calorific value of blast furnace gas through the energy balance equation;

[0050] A fifth submodule is used to construct a second equation related to CO quality and H2 quality through the low combustion calorific value of the blast furnace gas, the low calorific value of CO, and the low calorific value of H2;

[0051] The sixth submodule is used to jointly solve the first equation and the second equation to obtain the CO mass and H2 mass in the blast furnace gas.

[0052] Optionally, the bias correction model is modified as follows:

[0053] Acquire historical blast furnace gas detection data within a preset time period at a set time interval, wherein the historical blast furnace gas detection data includes: the actual proportion and predicted proportion of CO corresponding to each detection time point, and the actual proportion and predicted proportion of H2 corresponding to each detection time point;

[0054] For each detection time point, calculate the first difference between the corresponding actual CO proportion and the predicted proportion, and the second difference between the actual H2 proportion and the predicted proportion;

[0055] An average value of each of the first differences is determined as a correction value of the CO proportion, and an average value of each of the second differences is determined as a correction value of the H2 proportion.

[0056] An embodiment of the present invention also provides an electronic device, wherein the electronic device includes a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other through the communication bus; the memory is used to store computer programs; the processor is used to implement the blast furnace gas composition measurement method as described in any of the above embodiments when executing the program stored in the memory.

[0057] An embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, wherein when the program is executed by a processor, the method for measuring the composition of blast furnace gas as described in any of the above embodiments is implemented.

[0058] The blast furnace gas composition measurement solution provided in the embodiment of the present invention obtains the current operating data of the boiler; calculates the mass of CO and the mass of H2 in the blast furnace gas based on the current operating data and the pre-established energy balance equation and material balance equation; calculates the CO proportion and the H2 proportion in the blast furnace gas based on the blast furnace gas flow rate, the CO mass and the H2 mass in the blast furnace gas; corrects the CO proportion and the H2 proportion according to a regularly maintained deviation correction model to obtain the CO target proportion and the H2 target proportion, so as to accurately and timely detect the blast furnace gas composition. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 is a flowchart showing a method for measuring blast furnace gas composition according to an embodiment of the present application;

[0060] Figure 2 is a structural block diagram of a blast furnace gas composition measuring device according to an embodiment of the present application;

[0061] Figure 3 It is a structural block diagram of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0063] In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0064] In order to solve the problem of measuring the composition of blast furnace gas, the present application provides a method for predicting the composition of blast furnace gas based on material balance, energy balance and historical data-assisted prediction.

[0065] The blast furnace gas composition measurement scheme provided in the embodiment of the present application is described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0066] As attached Figure 1 As shown, the method for measuring the composition of blast furnace gas in the embodiment of the present application comprises the following steps:

[0067] Step 101: Obtain the current operation data of the boiler.

[0068] The method provided in the embodiment of the present application is used to measure the combustible gas of blast furnace gas, which is the fuel of blast furnace gas boiler. The method for measuring the composition of blast furnace gas provided in the embodiment of the present application can be applied to electronic equipment with computing and analyzing capabilities.

[0069] In actual implementation, the composition of blast furnace gas can be measured at a specific cycle, such as once every 2 seconds, and each measurement result can be stored. The specific cycle is not limited to 2 seconds, but can also be 3 seconds or 5 seconds.

[0070] The current operating data of the boiler include: blast furnace gas flow, steam flow, steam enthalpy, feed water enthalpy, feed water flow, outlet water temperature, inlet water temperature, flue gas temperature, flue gas specific heat capacity and ambient temperature, etc.

[0071] Step 102: Calculate the mass of CO and the mass of H2 in the blast furnace gas based on the current operation data and the pre-established energy balance equation and material balance equation.

[0072] The energy balance equation is that the product of the blast furnace gas flow rate and the low combustion calorific value of the blast furnace gas is equal to the sum of the steam-water system heat power and each preset heat loss power; wherein the preset heat loss power includes: the heat loss power of the wind and smoke system, the heat loss power of incombustibles, the mechanical heat loss power of slag and other heat loss powers. The exemplary expression of the energy balance equation is as follows:

[0073]

[0074] in: is the blast furnace gas flow rate; lhv is the low combustion calorific value of blast furnace gas; p steam is the thermal power of the steam-water system; p flue gas is the heat loss power of the wind and smoke system; p uncomb x stable is the heat loss power of gas / solid non-combustible matter; p ash is the mechanical heat loss power of slag; p otherrs is other heat loss power. Since the combustion of blast furnace gas is relatively complete, p ash , p uncombustable , p others Heat losses can be ignored.

[0075] The thermal power of the steam-water system is calculated in the following way: based on the enthalpy of steam, the enthalpy of feed water and the steam flow rate, the thermal power of the steam system is calculated; based on the outlet water temperature, the inlet water temperature, the specific heat capacity of water and the feed water flow rate, the thermal power of the feed water system is calculated; the sum of the thermal power of the steam system and the thermal power of the feed water system is determined as the thermal power of the steam-water system.

[0076] An exemplary steam system thermal power calculation formula is as follows:

[0077] Q 蒸汽 =m 蒸汽 ′×(h 蒸汽 -h 给水 )

[0078] Where: Q 蒸汽 is the thermal power of the steam system; m 蒸汽 is the steam flow rate; h 蒸汽 is the enthalpy of steam (in kJ / kg); h 给水 is the enthalpy of feed water (in kJ / kg).

[0079] An exemplary water supply system thermal power calculation formula is as follows:

[0080] Q 给水 =m 给水 ′×Cp×(T 出水 -T 进水 )

[0081] Where: Q 给水 is the thermal power of the water supply system; m 给水 is the water flow rate (kg / s). Cp is the specific heat capacity of water (kJ / kg·℃). 出水 is the outlet water temperature (°C). 进水 is the inlet water temperature (℃).

[0082] The total thermal power of the steam-water system is calculated as follows:

[0083] Q 总 =Q 蒸汽 +Q 给水

[0084] The heat loss of wind and smoke can be calculated by the flue gas temperature and the ambient temperature. The heat loss power of the wind and smoke system can be calculated as follows:

[0085] Calculate the difference between flue gas temperature and ambient temperature;

[0086] The product of the difference, the specific heat capacity of the flue gas and the flue gas mass flow rate is determined as the heat loss power of the air-smoke system.

[0087] An exemplary heat loss power calculation formula for the air-smoke system is: Qfluegas=Q flue gas ×Cp×(T flue -T ambien x)×100%

[0088] Where: Q flue gasis the flue gas mass flow rate; Cp is the specific heat capacity of the flue gas; T flue is the flue gas temperature; T ambient is the ambient temperature.

[0089] The oxygen consumption equation, also known as the material balance equation, is as follows. Based on the change in oxygen (O2), the CO and H2 contents can be estimated through the following reactions:

[0090] 2CO+O2→2CO2

[0091] 2H2+O2→2H2O

[0092] The consumed oxygen m can be calculated by the air volume supplied by the blower and the oxygen content in the furnace. o2 , the total mass of CO and H2 in blast furnace gas is derived through the actual oxygen consumption, and the first equation is listed as follows:

[0093] m CO +m h2 =m o2

[0094] The calorific value of blast furnace gas can be obtained through the energy balance equation. According to the lower calorific value of CO and H2, the lower calorific value of CO is 10.1MJ / kg, and the lower calorific value of H2 is 119.86MJ / kg, and the second equation is obtained:

[0095] LV co ·m co +lhv k2 ·m h2 =lhv

[0096] The masses of CO and H2 can be obtained by jointly solving the first equation and the second equation.

[0097] An optional method for calculating the mass of CO and the mass of H2 in blast furnace gas based on current operating data and a pre-established energy balance equation and material balance equation may include the following steps:

[0098] Step 1, calculating the oxygen consumption by the air supply of the blower and the oxygen content in the furnace;

[0099] Step 2, determining the total mass of CO and H2 in the blast furnace gas by the amount of oxygen consumed;

[0100] Step 3, construct the first equation related to CO mass and H2 mass through the total mass;

[0101] Step 4: Calculate the low combustion calorific value of blast furnace gas through the energy balance equation;

[0102] Step 5, constructing a second equation related to CO mass and H2 mass through the low combustion calorific value of the blast furnace gas, the low calorific value of CO, and the low calorific value of H2;

[0103] Step 6: Solve the first equation and the second equation jointly to obtain the mass of CO and the mass of H2 in the blast furnace gas.

[0104] This method of calculating the mass of CO and the mass of H2 in blast furnace gas has a small amount of calculation and a high accuracy of the calculation result.

[0105] Step 103: Calculate the CO proportion and the H2 proportion in the blast furnace gas based on the blast furnace gas flow rate, the CO mass and the H2 mass in the blast furnace gas.

[0106] Step 104: Correct the CO ratio and the H2 ratio according to the regularly maintained deviation correction model to obtain the CO target ratio and the H2 target ratio.

[0107] The bias correction model is corrected in the following way, including the following steps:

[0108] Step 1: Obtain historical blast furnace gas detection data within a preset time period according to a set time interval;

[0109] Among them, the historical blast furnace gas detection data include: the actual proportion and predicted proportion of CO corresponding to each detection time point, and the actual proportion and predicted proportion of H2 corresponding to each detection time point.

[0110] The preset time interval can be flexibly set by those skilled in the art, for example, to 1 day, 2 days or 30 hours, etc. The preset duration can be set to nearly five days, 7 days or 10 days, etc. The specific values ​​of the preset time interval and the preset duration are not limited in the embodiments of the present application.

[0111] Step 2: For each detection time point, calculate the first difference between the corresponding actual CO proportion and the predicted proportion, and the second difference between the actual H2 proportion and the predicted proportion.

[0112] Step 3: Determine the average value of each first difference as the correction value of the CO proportion, and determine the average value of each second difference as the correction value of the H2 proportion.

[0113] In the actual implementation process, the average value of each first difference and the second difference may also be determined as the common correction value of the CO proportion and the H2 proportion.

[0114] The blast furnace gas composition measurement method provided in the embodiment of the present application obtains the current operating data of the boiler; calculates the mass of CO and the mass of H2 in the blast furnace gas based on the current operating data and the pre-established energy balance equation and material balance equation; calculates the CO proportion and the H2 proportion in the blast furnace gas based on the blast furnace gas flow rate, the CO mass and the H2 mass in the blast furnace gas; corrects the CO proportion and the H2 proportion according to a regularly maintained deviation correction model to obtain the CO target proportion and the H2 target proportion, so as to accurately and timely detect the blast furnace gas composition.

[0115] The blast furnace gas composition measurement method provided in the embodiment of the present application can improve the boiler operation efficiency, save energy, reduce pollutant emissions and improve safety through online monitoring and analysis of the boiler operation status and its key parameters. The following is an expanded description of several major beneficial effects of blast furnace gas composition measurement:

[0116] Improve combustion efficiency: By real-time monitoring and adjusting the ratio of fuel to air, the fuel is ensured to be fully burned, thereby improving combustion efficiency and reducing the loss of unburned fuel;

[0117] Optimize combustion process parameters: make the boiler operate under the optimal working conditions and maximize thermal efficiency;

[0118] Energy saving: Avoid fuel waste and reduce energy consumption by accurately measuring and controlling the fuel supply; optimize boiler operating parameters in real time to reduce unnecessary energy loss;

[0119] Reduce pollutant emissions: Accurately control the oxygen content during combustion and reduce NO x 、SO x By optimizing the combustion conditions, the emission of pollutants such as CO and smoke can be reduced to meet the requirements of environmental protection regulations;

[0120] Improve operational stability and safety: monitor the operating status of the boiler in real time, detect and handle abnormal situations in time, and prevent accidents;

[0121] Provide real-time early warning and alarm functions to help operators respond quickly and ensure equipment safety;

[0122] Improve control accuracy and response speed: The blast furnace gas composition measurement technology provided in the embodiment of the present application can provide high-frequency and high-precision data, enhance the response speed and accuracy of the control system, achieve precise control of boiler operating parameters, and improve the control effect of the overall system;

[0123] Data analysis and decision support: Provides rich operating data and historical records to help operators perform data analysis and decision support;

[0124] Based on big data and machine learning algorithms, we conduct in-depth analysis of operating data to explore potential optimization opportunities;

[0125] In summary, blast furnace gas composition measurement technology can not only significantly improve the economy and environmental protection of boiler operation through the above beneficial effects, but also provide a safer and more reliable operating environment for industrial production, which is of great significance to the sustainable development of modern industry.

[0126] Figure 2 A structural block diagram of a blast furnace gas composition measuring device for implementing an embodiment of the present application.

[0127] The blast furnace gas composition measuring device provided in the embodiment of the present application includes the following functional modules:

[0128] The acquisition module 201 is used to acquire the current operation data of the boiler;

[0129] A first calculation module 202, for calculating the mass of CO and the mass of H2 in the blast furnace gas based on the current operation data and a pre-established energy balance equation and a material balance equation;

[0130] The second calculation module 203 is used to calculate the CO ratio and the H2 ratio in the blast furnace gas based on the blast furnace gas flow rate, the CO mass and the H2 mass in the blast furnace gas;

[0131] The correction module 204 is used to correct the CO proportion and the H2 proportion according to the regularly maintained deviation correction model to obtain the CO target proportion and the H2 target proportion.

[0132] Optionally, the energy balance equation is: the product of the blast furnace gas flow rate and the low combustion calorific value of the blast furnace gas is equal to the sum of the thermal power of the steam-water system and each preset heat loss power;

[0133] Among them, the preset heat loss power includes: heat loss power of the wind and smoke system, heat loss power of incombustible materials, heat loss power of slag machinery and other heat loss power.

[0134] Optionally, the thermal power of the steam-water system is calculated as follows:

[0135] Calculate the thermal power of the steam system based on the enthalpy of steam, the enthalpy of feed water and the steam flow rate;

[0136] Calculate the thermal power of the water supply system based on the outlet water temperature, inlet water temperature, specific heat capacity of water and water supply flow rate;

[0137] The sum of the thermal power of the steam system and the thermal power of the water supply system is determined as the thermal power of the steam-water system.

[0138] Optionally, the heat loss power of the air and smoke system is calculated as follows:

[0139] Calculate the difference between flue gas temperature and ambient temperature;

[0140] The product of the difference, the specific heat capacity of the flue gas and the flue gas mass flow rate is determined as the heat loss power of the air-smoke system.

[0141] Optionally, the first calculation module includes:

[0142] The first submodule is used to calculate the consumed oxygen amount through the air supply of the blower and the oxygen amount in the furnace;

[0143] The second submodule is used to determine the total mass of CO and H2 in the blast furnace gas by the amount of oxygen consumed;

[0144] A third submodule is used to construct a first equation related to CO mass and H2 mass through the total mass;

[0145] The fourth submodule is used to calculate the low combustion calorific value of blast furnace gas through the energy balance equation;

[0146] A fifth submodule is used to construct a second equation related to CO quality and H2 quality through the low combustion calorific value of the blast furnace gas, the low calorific value of CO, and the low calorific value of H2;

[0147] The sixth submodule is used to jointly solve the first equation and the second equation to obtain the CO mass and H2 mass in the blast furnace gas.

[0148] Optionally, the bias correction model is modified as follows:

[0149] Acquire historical blast furnace gas detection data within a preset time period at a set time interval, wherein the historical blast furnace gas detection data includes: the actual proportion and predicted proportion of CO corresponding to each detection time point, and the actual proportion and predicted proportion of H2 corresponding to each detection time point;

[0150] For each detection time point, calculate the first difference between the corresponding actual CO proportion and the predicted proportion, and the second difference between the actual H2 proportion and the predicted proportion;

[0151] An average value of each of the first differences is determined as a correction value of the CO proportion, and an average value of each of the second differences is determined as a correction value of the H2 proportion.

[0152] The embodiments of the present application provide Figure 2 The blast furnace gas composition measuring device shown can achieve Figure 1 To avoid repetition, the various processes implemented by the method embodiment are not described here.

[0153] The embodiment of the present invention further provides an electronic device, such as Figure 3 As shown, it includes a processor 301 , a communication interface 302 , a memory 303 and a communication bus 304 , wherein the processor 301 , the communication interface 302 , and the memory 303 communicate with each other via the communication bus 304 .

[0154] Memory 303, used for storing computer programs;

[0155] The processor 301 is used to implement each method step in the above method embodiment when executing the program stored in the memory 303.

[0156] The communication bus mentioned in the above terminal can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The communication bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one thick line is used in the figure, but it does not mean that there is only one bus or one type of bus.

[0157] The communication interface is used for communication between the above terminal and other devices.

[0158] The memory may include a random access memory (RAM) or a non-volatile memory, such as at least one disk memory. Optionally, the memory may also be at least one storage device located away from the aforementioned processor.

[0159] The above-mentioned processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

[0160] In another embodiment provided by the present invention, a computer-readable storage medium is also provided, in which instructions are stored. When the computer-readable storage medium is executed on a computer, the computer implements the blast furnace gas composition measurement method described in any of the above embodiments.

[0161] In another embodiment provided by the present invention, a computer program product including instructions is also provided, which, when executed on a computer, enables the computer to implement the blast furnace gas composition measurement method described in any one of the above embodiments.

[0162] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present invention is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, computer, server or data center to another website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state hard disk Solid State Disk (SSD)), etc.

[0163] It should be noted that, in this article, the terms "include", "comprises" or any other variations 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, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0164] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for measuring blast furnace gas composition, characterized in that: The method comprises: Get the current operation data of the boiler; Calculate the mass of CO and the mass of H2 in the blast furnace gas based on the current operating data and the pre-established energy balance equation and material balance equation; Calculate the CO ratio and the H2 ratio in the blast furnace gas based on the blast furnace gas flow rate, the CO mass and the H2 mass in the blast furnace gas; The CO proportion and the H2 proportion are corrected according to a regularly maintained deviation correction model to obtain a CO target proportion and a H2 target proportion.

2. The method according to claim 1, characterized in that The energy balance equation is: the product of the blast furnace gas flow rate and the low combustion calorific value of the blast furnace gas is equal to the sum of the thermal power of the steam-water system and each preset heat loss power; Among them, the preset heat loss power includes: heat loss power of the wind and smoke system, heat loss power of incombustible materials, heat loss power of slag machinery and other heat loss power.

3. The method according to claim 1, characterized in that The thermal power of the steam-water system is calculated as follows: Calculate the thermal power of the steam system based on the enthalpy of steam, the enthalpy of feed water and the steam flow rate; Calculate the thermal power of the water supply system based on the outlet water temperature, inlet water temperature, specific heat capacity of water and water supply flow rate; The sum of the thermal power of the steam system and the thermal power of the water supply system is determined as the thermal power of the steam-water system.

4. The method according to claim 1, characterized in that: The heat loss power of the wind and smoke system is calculated as follows: Calculate the difference between flue gas temperature and ambient temperature; The product of the difference, the specific heat capacity of the flue gas and the flue gas mass flow rate is determined as the heat loss power of the air-smoke system.

5. The method according to claim 2, characterized in that: The step of calculating the mass of CO and the mass of H2 in the blast furnace gas based on the current operation data and the pre-established energy balance equation and material balance equation comprises: The consumed oxygen amount is calculated by the air volume supplied by the blower and the oxygen amount in the furnace; Determine the total mass of CO and H2 in the blast furnace gas by the amount of oxygen consumed; Constructing a first equation related to CO mass and H2 mass through the total mass; The low combustion calorific value of blast furnace gas is calculated by the energy balance equation; Constructing a second equation related to CO mass and H2 mass through the low combustion calorific value of blast furnace gas, the low calorific value of CO, and the low calorific value of H2; By jointly solving the first equation and the second equation, the mass of CO and the mass of H2 in the blast furnace gas can be obtained.

6. The method according to claim 1, characterized in that The bias correction model is modified as follows: Acquire historical blast furnace gas detection data within a preset time period at a set time interval, wherein the historical blast furnace gas detection data includes: the actual proportion and predicted proportion of CO corresponding to each detection time point, and the actual proportion and predicted proportion of H2 corresponding to each detection time point; For each detection time point, calculate the first difference between the corresponding actual CO proportion and the predicted proportion, and the second difference between the actual H2 proportion and the predicted proportion; An average value of each of the first differences is determined as a correction value of the CO proportion, and an average value of each of the second differences is determined as a correction value of the H2 proportion.

7. A blast furnace gas composition measuring device, characterized in that: The device comprises: The acquisition module is used to obtain the current operation data of the boiler; A first calculation module is used to calculate the mass of CO and the mass of H2 in the blast furnace gas based on the current operation data and the pre-established energy balance equation and material balance equation; A second calculation module is used to calculate the CO proportion and the H2 proportion in the blast furnace gas based on the blast furnace gas flow rate, the CO mass and the H2 mass in the blast furnace gas; The correction module is used to correct the CO proportion and the H2 proportion according to the regularly maintained deviation correction model to obtain the CO target proportion and the H2 target proportion.

8. The device according to claim 7, characterized in that The energy balance equation is: the product of the blast furnace gas flow rate and the low combustion calorific value of the blast furnace gas is equal to the sum of the thermal power of the steam-water system and each preset heat loss power; Among them, the preset heat loss power includes: heat loss power of the wind and smoke system, heat loss power of incombustible materials, heat loss power of slag machinery and other heat loss power.

9. The method according to claim 1, characterized in that: The thermal power of the steam-water system is calculated as follows: Calculate the thermal power of the steam system based on the enthalpy of steam, the enthalpy of feed water and the steam flow rate; Calculate the thermal power of the water supply system based on the outlet water temperature, inlet water temperature, specific heat capacity of water and water supply flow rate; The sum of the thermal power of the steam system and the thermal power of the water supply system is determined as the thermal power of the steam-water system.

10. An electronic device, characterized in that: It includes a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other through the communication bus; Memory, used to store computer programs; The processor is used to implement the blast furnace gas composition measurement method as described in any one of claims 1-8 when executing the program stored in the memory.

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