A method and system for controlling the source of sulfur dioxide emissions from flue gas in ironmaking hot blast furnaces

Abstract

The present invention belongs to the technical field of energy conservation and emission reduction in metallurgy and iron and steel, and proposes a method and system for source control of sulfur dioxide emissions from flue gas of iron-making hot blast furnaces, aiming to solve the problem of source sulfur element control in the blast furnace iron-making process, so as to achieve the purpose of standard emission of sulfur dioxide from flue gas of hot blast furnaces at all times. The system includes a data acquisition and transmission module, a memory, an analysis and calculation module, a data monitoring module, and a control terminal. The input end of the data acquisition and transmission module is respectively connected to the data monitoring module and the metering system and component detection system of the blast furnace body, and its output end is respectively connected to the analysis and calculation module and the control terminal; the data acquisition and transmission module is interactively connected to the memory, the analysis and calculation module and the control terminal. The present invention performs origin control from the source of blast furnace raw materials and operations, and has the characteristics of few control actions, short time, compact rhythm and high production efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy conservation and emission reduction in metallurgy and iron and steel, and specifically relates to a method and system for controlling the emission source of sulfur dioxide from flue gas of an ironmaking hot blast furnace. Background Art

[0002] The main link of SO2 emission in the blast furnace ironmaking unit is the hot blast furnace, which emits SO2 in the flue gas when heating and burning blast furnace gas or mixed gas containing sulfides such as H2S. The sulfides in blast furnace gas come from the amount of S in the raw and auxiliary materials entering the blast furnace, which is called the S load entering the furnace. In other words, the S load entering the blast furnace unit affects the S content in the blast furnace gas, and also affects the concentration and amount of SO2 emitted by the hot blast furnace.

[0003] In April 2019, the Ministry of Ecology and Environment, the National Development and Reform Commission and other five ministries and commissions issued the "Opinions on Promoting the Implementation of Ultra-low Emissions in the Steel Industry", which requires that the emission concentration limit of SO2 pollutants emitted by hot blast furnaces in ironmaking projects in new (including relocated) projects nationwide be 50mg / m 3 The emission limit for hot blast furnaces (new, existing and special areas) is 100 mg / m 3 At present, the SO2 emitted by hot blast furnaces in steel plants cannot stably meet the ultra-low emission requirements at all times. Therefore, it is necessary to set up a system for source control of blast furnace raw materials to help blast furnaces control the source sulfur elements and reduce the sulfur load entering the furnace. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a method and system for source control of sulfur dioxide emissions from flue gas in iron-making hot blast furnaces, aiming to solve the problem of source sulfur element control in the blast furnace iron-making process.

[0005] The present invention is achieved through the following technical solutions:

[0006] The present invention provides a source control system for sulfur dioxide emissions from flue gas in iron-making hot blast furnaces, comprising a data acquisition and transmission module, a memory, an analysis and calculation module, a data monitoring module, and a control and management terminal. The input end of the data acquisition and transmission module is respectively connected to the data monitoring module and the metering system and component detection system of the blast furnace body, and the output end is respectively connected to the analysis and calculation module and the control and management terminal; the data acquisition and transmission module and the memory, as well as the analysis and calculation module and the control and management terminal are interactively connected.

[0007] Furthermore, the analysis and calculation module includes a function for calculating the sulfur concentration value C in the blast furnace gas. BFGThe calculation formula of the blast furnace gas sulfur concentration calculation submodule is:

[0008] C BFG =[(1-η1-η2)× L t -L 尘泥 ] / G bfg ;

[0009] in,

[0010] L t = L total / P iron ;

[0011] L total =∑W i ·υ i ;

[0012] η1 is the distribution ratio of sulfur in molten iron; η2 is the distribution ratio of sulfur in slag; L t is the sulfur load value of unit molten iron; G bfg is the amount of blast furnace gas generated per unit of molten iron; L 尘泥 It is a fixed value calculated by sampling the blast furnace gas dust removal ash and the iron-making yard dust removal ash data; P iron is the pig iron output; L total is the total sulfur load value entering the furnace, which is calculated based on the blast furnace metering data provided by the metering system. i is the mass of material i entering the furnace, kg; υ i is the mass proportion of sulfur element in material i.

[0013] Furthermore, the distribution ratio values ​​of sulfur element in molten iron and slag are calculated based on the component detection data provided by the component detection system, and the component detection data include the molten iron output and the sulfur content therein, and the slag output and the sulfur content therein.

[0014] Furthermore, the material i in the blast furnace metering data includes: the amount of coke charged into the furnace, the amount of coal powder charged into the furnace, the amount of mixed ore charged into the furnace, and the amount of limestone and dolomite charged into the furnace.

[0015] Furthermore, the analysis and calculation module also includes a step of calculating the sulfur dioxide emission standard concentration value C in the hot blast furnace flue gas emission under the current production operation conditions according to the sulfur dioxide emission model. 标 The maximum sulfur load of the unit molten iron is L max Hot blast stove combustion analysis and calculation submodule.

[0016] Furthermore, the sulfur dioxide emission model is based on the sulfur concentration value C in blast furnace gas. BFG The sulfur dioxide concentration C in the hot blast stove combustion flue gas is calculated based on the hot blast stove combustion parameters. SO2The sulfur dioxide concentration in the flue gas actually monitored by the data monitoring module is quantified and established, and the calculation formula is:

[0017] (V bfg +∑Vi);

[0018] in:

[0019] = C BFG *V bfg +∑Ci*Vi;

[0020] ;

[0021] ;

[0022] ;

[0023] +V O2 ×79 / 21;

[0024] is the total sulfur content of coal gas, mg: C BFG is the sulfur concentration in blast furnace gas, mg / Nm 3 ; V bfg The volume of blast furnace gas used for hot blast stove combustion, Nm 3 ; Vi is the volume of each type of gas consumed by the hot blast stove except blast furnace gas, Nm 3 ; α is the excess air coefficient; The theoretical oxygen demand for gas combustion, Nm 3 / Nm 3 gas; is the theoretical air volume, Nm 3 / Nm 3 Gas; Ci is the sulfur content of other coal gas used, mg / Nm 3 ; V y is the actual flue gas volume produced per unit gas, Nm 3 / Nm 3 gas; The theoretical flue gas volume produced per unit gas, Nm 3 / Nm 3 gas.

[0025] Furthermore, the management and control terminal includes a real-time analysis and control submodule of the sulfur load entering the furnace associated with the blast furnace gas sulfur concentration calculation submodule, and a hot blast furnace combustion management and control analysis submodule associated with the hot blast furnace combustion analysis and calculation submodule.

[0026] The present invention also provides a method for controlling the source of sulfur dioxide emissions from flue gas in an ironmaking hot blast furnace, using the above system, comprising the following steps:

[0027] S1: Collect the real-time monitoring values ​​of the blast furnace and transmit them to the analysis and calculation module and the control terminal;

[0028] S2: The analysis and calculation module calculates the total sulfur load value L entering the furnace total 、Sulfur load value per unit molten iron L t and sulfur concentration in blast furnace gas C BFG ;

[0029] S3: The sulfur concentration in blast furnace gas C BFG Effect of hot blast stove combustion parameters on sulfur dioxide concentration C in hot blast stove combustion flue gas SO2 Conduct analytical calculations;

[0030] S4: Establish a hot blast furnace flue gas sulfur dioxide emission model based on the sulfur load value entering the furnace;

[0031] S5: Calculate the sulfur dioxide emission standard concentration value C in the hot blast furnace flue gas emission under the current production operation conditions according to the sulfur dioxide emission model 标 The maximum sulfur load of the unit molten iron is L max ;

[0032] S6: The system automatically sets L max As the threshold, the sulfur load value L of the unit molten iron entering the furnace is determined in real time. t With threshold L max and adjust the hot blast furnace combustion parameters or the raw materials entering the furnace according to the system prompts.

[0033] Preferably, step S6 includes the following steps:

[0034] S61: Determine L t With L max If L t <L max , then maintain the existing parameter settings and operations unchanged;

[0035] S62: If L t ≥L max , an alarm is issued, and the hot blast stove combustion parameters are adjusted through the interface of the control terminal. The system predicts the sulfur dioxide concentration value C in the exhaust gas based on the adjusted parameters using the sulfur dioxide emission model. SO2 , and judge the sulfur dioxide emission standard concentration value C 标 relationship;

[0036] S63: If C SO2 <C 标, the system recommends setting the hot blast stove combustion parameters according to the adjusted parameters; if C SO2 ≥C 标 , the system issues a command, prompting whether to improve the quality of the raw fuel entering the furnace? If you choose no, it will enter the desulfurization mode, and the system will automatically calculate the minimum desulfurization efficiency that meets the standard for the entire period; if you choose yes, it will enter the source control mode, and the system will automatically propose to adjust the raw materials entering the furnace according to the prompts to reduce the total sulfur load L entering the furnace total , then proceed to step S61.

[0037] By adopting the above scheme, the method and system for source control of sulfur dioxide emissions from flue gas of hot blast furnaces for ironmaking of the present invention provide a system and method for controlling sulfur dioxide emissions from hot blast furnace combustion from the source of raw materials and operations for steel enterprises. By connecting with the existing detection and analysis and component analysis systems, the optimal sulfur load value entering the furnace that meets the standard concentration of sulfur dioxide emissions from hot blast furnaces for ironmaking under specific conditions is calculated, thereby performing source control on sulfur-containing raw and auxiliary materials entering the blast furnace, so as to achieve precise control of boundary parameters that exceed the limit in individual time periods, and achieve standard emissions throughout the entire time period.

[0038] The advantages of the present invention are: the present invention controls the origin from the blast furnace raw materials and operation sources, and achieves the purpose of achieving the standard emission of sulfur dioxide in the hot blast furnace flue gas at all times. It has the characteristics of less control actions, short time, compact rhythm and high production efficiency.

[0039] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings, in which:

[0041] Figure 1 This is a framework diagram of the source control system of the present invention.

[0042] Figure 2 This is a structural diagram of the source control system of the present invention.

[0043] Figure 3 It is a flow chart of the source control system of the present invention.

[0044] Figure numerals: data acquisition and transmission module 1, memory 2, analysis and calculation module 3, data monitoring module 4, control terminal 5, metering system 6, component detection system 7; blast furnace gas sulfur concentration calculation submodule 31, hot blast furnace combustion analysis and calculation submodule 32; furnace sulfur load real-time analysis and control submodule 51, hot blast furnace combustion control and analysis submodule 52. DETAILED DESCRIPTION

[0045] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0046] like Figure 1 , 2 As shown, the system for source control of sulfur dioxide emitted from the hot blast furnace flue gas in the blast furnace ironmaking process mentioned in this embodiment includes a data acquisition and transmission module 1, a memory 2, an analysis and calculation module 3, a data monitoring module 4, and a control terminal 5. Among them, the input end of the data acquisition and transmission module 1 is respectively connected to the data monitoring module 4 and the metering system 6 and component detection system 7 of the blast furnace body, and its output end is respectively connected to the analysis and calculation module 3 and the control terminal 5; the data acquisition and transmission module 1 and the memory 2, and the analysis and calculation module 3 and the control terminal 5 are respectively interconnected. In this way, by collecting the concentration value of sulfur dioxide emitted by the hot blast furnace combustion and the real-time monitoring of the sulfur dioxide concentration value in the flue gas volume, and the blast furnace metering data and component detection data obtained from the metering system 6 and component detection system 7 of the blast furnace system are transmitted to this system through the data acquisition and transmission module 1, and then analyzed and calculated and visualized by the analysis and calculation module 3 and the control terminal 5, respectively, and the data is also stored in the memory 2. The analysis and calculation module 3 can interact with the control terminal 5, and is divided into a blast furnace gas sulfur concentration calculation submodule 31 and a hot blast stove combustion analysis and calculation submodule 32, and performs analysis and calculation based on the monitoring data obtained by the system from the data monitoring module 4 and the interactive information of the control terminal 5, and the calculation results are visualized on the control terminal 5. The control terminal 5 is divided into a furnace sulfur load real-time analysis and control submodule 51 and a hot blast stove combustion control and analysis submodule 52 by constructing a computer software system.

[0047] During operation, a mathematical model is established for calculation and analysis based on the sulfur content and amount of raw and auxiliary materials entering the blast furnace at the input end of the blast furnace, as well as the sulfur content of molten iron, sulfur content of slag and the amount produced at the output end, and other complete data related to the blast furnace process production cycle, to predict the sulfur dioxide concentration in the flue gas emitted by the hot blast furnace. Then, the actual sulfur dioxide concentration and amount emitted in the hot blast furnace flue gas obtained by the data monitoring module are compared and analyzed with the predicted data, and iterated through data mining and machine learning to find out the quantifiable influence relationship and establish a hot blast furnace flue gas sulfur dioxide emission model based on the blast furnace load parameters. Then, based on this sulfur dioxide emission model, the optimal sulfur load entering the furnace that meets the sulfur dioxide emission standard concentration of the ironmaking hot blast furnace is calculated under the condition that the production operation factors remain unchanged, that is, the sulfur content of raw and auxiliary materials can be selected to be regulated according to the optimal sulfur load entering the furnace, so as to control the source of sulfur-containing raw and auxiliary materials entering the blast furnace.

[0048] Specifically, the system first connects to the metering system and component detection system of the blast furnace, and collects the amount and sulfur content of coke fed into the furnace, the amount and sulfur content of coal powder fed into the furnace, the amount and sulfur content of mixed ore fed into the furnace, the amount and sulfur content of limestone and dolomite fed into the furnace, as well as the parameters such as molten iron output, molten iron sulfur content, slag output, slag sulfur content, and blast furnace gas generation. The blast furnace gas sulfur concentration calculation submodule is used to calculate the sulfur concentration value C in the blast furnace gas. BFG , first calculate the total sulfur load value L entering the furnace according to the calculation formula of this system total And the sulfur load value per unit of molten iron L t , that is: L total =∑W i •υ i , L t = L total / P iron , where W i is the mass of material i entering the furnace, kg; υ i is the mass proportion of sulfur-containing element in material i; P iron is the output of pig iron. Since blast furnace gas, slag, molten iron and blast furnace gas dust are produced during blast furnace production, under stable operating conditions, the distribution ratio of sulfur in molten iron and slag remains basically unchanged. η1 is the distribution ratio of sulfur in molten iron, η2 is the distribution ratio of sulfur in slag, and the sulfur concentration in blast furnace gas can be calculated: C BFG =[(1-η1-η2)×L t -L 尘泥 ] / G bfg , where G bfg is the amount of blast furnace gas generated per unit of molten iron; L 尘泥 It is a fixed value calculated by sampling data such as blast furnace gas dust removal ash and iron-making yard dust removal ash, and is entered manually.

[0049] The hot blast stove combustion analysis calculation submodule can be used according to the calculated C BFG The sulfur dioxide concentration C in the hot blast furnace combustion flue gas is calculated based on the input hot blast furnace combustion parameters and the combustion medium type, dosage, combustion medium components and their proportions. SO2 The calculation method is: (V bfg +∑Vi); where: = C BFG *V bfg +∑Ci*Vi; ; +V O2 ×79 / 21; ; ; is the total sulfur content of coal gas, mg: C BFG is the sulfur concentration in blast furnace gas, mg / Nm 3 ; V bfg The volume of blast furnace gas used for hot blast stove combustion, Nm 3 ; Vi is the volume of each type of gas other than blast furnace gas consumed by hot blast stove combustion, Nm 3 ; α is the excess air coefficient; The theoretical oxygen demand for gas combustion, Nm 3 / Nm 3 gas; is the theoretical air volume, Nm 3 / Nm 3 Gas; Ci is the sulfur content of other coal gas used, mg / Nm 3 ; V y is the actual flue gas volume produced per unit gas, Nm 3 / Nm 3 gas; The theoretical flue gas volume produced per unit gas, Nm 3 / Nm 3 Gas. CO, C2H4, O2, etc. represent the volume fraction of the corresponding gas in the gas, respectively. The concentration of sulfur dioxide in the flue gas actually monitored by the data monitoring module is compared with the theoretically calculated sulfur dioxide concentration for data mining and machine learning to find out the quantifiable influence relationship, and establish a hot blast furnace flue gas sulfur dioxide emission model based on the blast furnace load parameters. In this way, the high value L of the sulfur load per unit of molten iron that meets the sulfur dioxide emission standard concentration of the hot blast furnace under the production operation conditions is calculated. max .

[0050] The real-time analysis and control submodule of the sulfur load entering the blast furnace displays the names of different sulfur-containing materials entering the blast furnace, the amount entering the furnace and the corresponding proportion of the sulfur load entering the furnace by constructing visual interfaces such as graphs and tables, and calculates the sulfur load Lt per unit of molten iron; the system automatically sets the calculated L max is the threshold, if L t ≥L max , an alarm will be given.

[0051] The hot blast stove combustion control and analysis submodule builds an interactive interface to guide users to input the gas type (such as blast furnace gas, converter gas, coke oven gas) used by the hot blast stove and the proportion of different types of gas used, as well as the preset analysis conditions such as the component content, sulfur content, excess air coefficient, theoretical combustion temperature, etc. of other gases except blast furnace gas, and link to the L calculated in the furnace sulfur load real-time analysis and control submodule. t The sulfur dioxide emission model is used to predict the sulfur dioxide emission concentration value C in the hot blast furnace flue gas. SO2 The results are displayed in a table format through the computer display interface, and C SO2 Compared with the sulfur dioxide emission standard concentration value C 标 The hot blast furnace combustion parameters are set in a reasonable range in the system. This range is automatically set according to the hot blast furnace theoretical combustion temperature. If the input combustion parameters exceed the reasonable range calculated by the system, the system will display "cannot meet the combustion requirements" and will not participate in subsequent calculations.

[0052] Recombination Figure 3 As shown, the method for source control of sulfur dioxide emitted from hot blast furnace flue gas in a blast furnace ironmaking process according to the present invention is described in detail below, which specifically includes the following steps:

[0053] S1: Collect the real-time monitoring values ​​of the blast furnace and transmit them to the analysis and calculation module and the control terminal;

[0054] S2: The analysis and calculation module calculates the total sulfur load L entering the furnace based on the output and sulfur content data of molten iron, slag, blast furnace gas, etc. from the blast furnace metering system. total The sulfur concentration C in blast furnace gas is calculated by collecting parameters such as molten iron output, molten iron sulfur content, slag output, slag sulfur content, and blast furnace gas generation. BFG ;

[0055] S3: By acquiring or inputting combustion condition parameters such as the hot blast stove combustion medium and the air excess coefficient, the sulfur dioxide concentration in the flue gas emitted by the hot blast stove is analyzed;

[0056] S4: Establish a sulfur dioxide emission model in hot blast furnace flue gas based on blast furnace sulfur load parameters;

[0057] S5: Calculate the sulfur dioxide emission standard concentration value C of the hot blast furnace under the production operation conditions according to the sulfur dioxide emission model 标 The maximum sulfur load of the unit molten iron is L max ;

[0058] S6: The system automatically sets L max As the threshold, the calculated sulfur load value L of the blast furnace per unit molten iron in real time is determined. t With L max The system will prompt if L t If the threshold is exceeded, the system prompts to adjust the hot blast furnace combustion parameters or the raw materials entering the furnace.

[0059] Furthermore, the specific steps of S6 include:

[0060] S61: Determine L t With L max If Lt<L max , then maintain the existing parameter settings and operations unchanged;

[0061] S62: If L t ≥L max , an alarm is given, and the hot blast furnace combustion parameters are adjusted within a certain range through the interface of the control system. The model is used to predict the sulfur dioxide concentration value C of the emission according to the adjusted parameters. SO2 , and judge whether it is consistent with emission standard C 标 relationship;

[0062] S63: If C SO2 <C 标 , the system recommends setting the hot blast stove combustion parameters according to the adjusted parameters; if C SO2 ≥C 标 The system issues instructions, and the raw materials entering the furnace are adjusted according to the prompts to reduce the total sulfur load L entering the furnace. total , then proceed to step S61.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A source control system for sulfur dioxide emission from flue gas of ironmaking hot blast furnace, characterized in that: The invention comprises a data acquisition and transmission module (1), a memory (2), an analysis and calculation module (3), a data monitoring module (4), and a control terminal (5); the input end of the data acquisition and transmission module is respectively connected to the data monitoring module and a metering system (6) and a component detection system (7) provided by the blast furnace body, and the output end is respectively connected to the analysis and calculation module and the control terminal; the data acquisition and transmission module and the memory, and the analysis and calculation module and the control terminal are respectively interconnected; The analysis and calculation module includes a module for calculating the sulfur concentration value C in the blast furnace gas. BFG The blast furnace gas sulfur concentration calculation submodule (31) has a calculation formula as follows: C BFG =[(1-η1-η2)× L t -L 尘泥 ] / G bfg ; in, L t = L total / P iron ; L total =∑W i ·u i ; η1 is the distribution ratio of sulfur in molten iron; η2 is the distribution ratio of sulfur in slag; L t is the sulfur load value of unit molten iron; G bfg is the amount of blast furnace gas generated per unit of molten iron; L 尘泥 It is a fixed value calculated by sampling the blast furnace gas dust removal ash and the iron-making yard dust removal ash data; P iron is the pig iron output; L total is the total sulfur load value entering the furnace, which is calculated based on the blast furnace metering data provided by the metering system. i is the mass of material i entering the furnace, kg; υ i is the mass proportion of sulfur element in material i; The analysis and calculation module also includes a method for calculating the sulfur dioxide emission standard concentration value C in the hot blast furnace flue gas emission under the current production operation conditions according to the sulfur dioxide emission model. 标 The maximum sulfur load of the unit molten iron is L max Hot blast stove combustion analysis calculation submodule (32); The sulfur dioxide emission model is based on the sulfur concentration value C in blast furnace gas. BFG The sulfur dioxide concentration C in the hot blast stove combustion flue gas is calculated based on the hot blast stove combustion parameters. SO2 The sulfur dioxide concentration in the flue gas actually monitored by the data monitoring module is quantified and established, and the calculation formula is: (In) bfg +∑Vi); in: = C BFG *V bfg +∑Ci*Vi; ； ； ； +V O2 ×79 / 21； is the total sulfur content of coal gas, mg: C BFG is the sulfur concentration in blast furnace gas, mg / Nm 3 ; V bfg The volume of blast furnace gas used for hot blast stove combustion, Nm 3 ; Vi is the volume of each type of gas consumed by the hot blast stove except blast furnace gas, Nm 3 ; α is the excess air coefficient; The theoretical oxygen demand for gas combustion, Nm 3 / Nm 3 gas; is the theoretical air volume, Nm 3 / Nm 3 Gas; Ci is the sulfur content of other coal gas used, mg / Nm 3 ; V y is the actual flue gas volume produced per unit gas, Nm 3 / Nm 3 gas; The theoretical flue gas volume produced per unit gas, Nm 3 / Nm 3 gas; The control terminal comprises a real-time analysis and control submodule (51) of the inlet sulfur load associated with the blast furnace gas sulfur concentration calculation submodule, and a hot blast furnace combustion control and analysis submodule (52) associated with the hot blast furnace combustion analysis and calculation submodule.

2. The source control system for sulfur dioxide emission from flue gas of hot blast furnaces in ironmaking according to claim 1 is characterized in that: The distribution ratios of sulfur in molten iron and slag are calculated based on component detection data provided by a component detection system, and the component detection data include molten iron output and its sulfur content, and slag output and its sulfur content.

3. The source control system for sulfur dioxide emission from flue gas of hot blast furnaces according to claim 1 is characterized in that: The materials i in the blast furnace metering data include: the amount of coke charged into the furnace, the amount of coal powder charged into the furnace, the amount of mixed ore charged into the furnace, and the amount of limestone and dolomite charged into the furnace.

4. A method for controlling the source of sulfur dioxide emissions from flue gas of an ironmaking hot blast furnace, characterized in that: Using the system according to any one of claims 1 to 3, the method comprises the following steps: S1: Collect the real-time monitoring values ​​of the blast furnace and transmit them to the analysis and calculation module and the control terminal; S2: The analysis and calculation module calculates the total sulfur load value L entering the furnace total 、Sulfur load value per unit molten iron L t and sulfur concentration in blast furnace gas C BFG ; S3: The sulfur concentration in blast furnace gas C BFG Effect of hot blast stove combustion parameters on sulfur dioxide concentration C in hot blast stove combustion flue gas SO2 Conduct analytical calculations; S4: Establish a hot blast furnace flue gas sulfur dioxide emission model based on the sulfur load value entering the furnace; S5: Calculate the sulfur dioxide emission standard concentration value C in the hot blast furnace flue gas emission under the current production operation conditions according to the sulfur dioxide emission model 标 The maximum sulfur load of the unit molten iron is L max ; S6: The system automatically sets L max As the threshold, the sulfur load value L of the unit molten iron entering the furnace is determined in real time. t With threshold L max and adjust the hot blast furnace combustion parameters or the raw materials entering the furnace according to the system prompts.

5. The method for controlling the source of sulfur dioxide emissions from flue gas of an ironmaking hot blast furnace according to claim 4, characterized in that: Step S6 includes the following steps: S61: Determine L t With L max If L t <L max , then maintain the existing parameter settings and operations unchanged; S62: If L t ≥L max , an alarm is issued, and the hot blast stove combustion parameters are adjusted through the interface of the control terminal. The system predicts the sulfur dioxide concentration value C in the exhaust gas based on the adjusted parameters using the sulfur dioxide emission model. SO2 , and judge the sulfur dioxide emission standard concentration value C 标 relationship; S63: If C SO2 <C 标 , the system recommends setting the hot blast stove combustion parameters according to the adjusted parameters; if C SO2 ≥C 标 , the system issues a command, prompting whether to improve the quality of the raw fuel entering the furnace. If you choose no, it will enter the desulfurization mode, and the system will automatically calculate the minimum desulfurization efficiency that meets the standards for the entire period; If you select yes, you will enter the source control mode, and the system will automatically ask you to adjust the raw materials into the furnace according to the prompts to reduce the total sulfur load L into the furnace. total , then proceed to step S61.

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