CN115232903B - Blast furnace hot blast stove system and flue gas purification method, device, equipment and medium thereof - Google Patents
Blast furnace hot blast stove system and flue gas purification method, device, equipment and medium thereof Download PDFInfo
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- CN115232903B CN115232903B CN202210847170.8A CN202210847170A CN115232903B CN 115232903 B CN115232903 B CN 115232903B CN 202210847170 A CN202210847170 A CN 202210847170A CN 115232903 B CN115232903 B CN 115232903B
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- 239000003546 flue gas Substances 0.000 title claims abstract description 133
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 132
- 238000000034 method Methods 0.000 title claims abstract description 64
- 238000000746 purification Methods 0.000 title abstract description 14
- 239000007789 gas Substances 0.000 claims abstract description 409
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 173
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 173
- 239000011593 sulfur Substances 0.000 claims abstract description 173
- 230000001105 regulatory effect Effects 0.000 claims abstract description 42
- 238000001514 detection method Methods 0.000 claims abstract description 27
- 230000001276 controlling effect Effects 0.000 claims abstract description 15
- 238000004590 computer program Methods 0.000 claims description 16
- 238000003860 storage Methods 0.000 claims description 13
- 238000004140 cleaning Methods 0.000 claims description 12
- 238000012938 design process Methods 0.000 claims description 4
- 239000000446 fuel Substances 0.000 claims description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 abstract description 56
- 239000000126 substance Substances 0.000 abstract description 6
- 239000002699 waste material Substances 0.000 abstract description 6
- 230000008569 process Effects 0.000 description 24
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 21
- 229910052742 iron Inorganic materials 0.000 description 10
- 238000013507 mapping Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 238000004891 communication Methods 0.000 description 8
- 238000012545 processing Methods 0.000 description 6
- 230000009467 reduction Effects 0.000 description 5
- 239000000567 combustion gas Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000000571 coke Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 238000013473 artificial intelligence Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000010801 machine learning Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B9/00—Stoves for heating the blast in blast furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B9/00—Stoves for heating the blast in blast furnaces
- C21B9/10—Other details, e.g. blast mains
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The embodiment of the invention discloses a blast furnace hot blast stove system and a flue gas purification method, a device, equipment and a medium thereof. The system comprises: the blast furnace gas sulfur content detection device is arranged in a blast furnace gas pipeline in front of the gas preheater and is used for detecting the sulfur content in the input blast furnace gas; the converter gas sulfur content detection device is arranged in a converter gas pipeline and is used for detecting the sulfur content in the input converter gas; the converter gas flow regulating device is arranged in the converter gas pipeline and is used for controlling the converter gas flow in the converter gas pipeline; the flue gas sulfur content detection device is arranged in the flue gas pipeline and used for detecting the sulfur content in the output flue gas. The method solves the problems of higher cost and new waste generation caused by adopting a chemical mode to realize the purification of sulfur dioxide in the discharged flue gas, and realizes that the cost required by reducing the emission of the sulfur dioxide is effectively reduced while the content of the corresponding sulfur dioxide is reduced, so that the method has higher practicability.
Description
Technical Field
The embodiment of the invention relates to the technical field of flue gas purification of blast furnace hot blast stoves, in particular to a blast furnace hot blast stove system and a flue gas purification method, device, equipment and medium thereof.
Background
Iron metal is one of main materials for social production and construction, and plays an extremely important role in the development of modern society. At present, a blast furnace ironmaking process is generally adopted in the iron smelting process, but when blast furnace ironmaking is carried out by using coal gas, a great amount of sulfur dioxide is contained in the discharged flue gas, so that a certain influence is caused on the environment. Therefore, the method has important significance for controlling the content of sulfur dioxide gas in the discharged flue gas in the blast furnace ironmaking process.
In the prior art, the purification of sulfur dioxide in the corresponding flue gas emission is generally realized by means of various chemical modes, but the mode for realizing the emission reduction of sulfur dioxide has higher cost, and the novel waste material problem is easy to generate, so that the practicability is not strong.
Disclosure of Invention
The invention provides a blast furnace hot blast stove system, and a flue gas purifying method, a device, equipment and a medium thereof, so as to reduce the content of sulfur dioxide in corresponding flue gas and effectively reduce the purifying cost.
In a first aspect, an embodiment of the present invention provides a blast furnace hot blast stove system, comprising: a blast furnace gas pipeline, a converter gas pipeline, a gas preheater, a converter gas pressurizer, a hot blast stove, a flue gas pipeline and a chimney; the gas preheater is connected between the blast furnace gas pipeline and the hot blast stove; the converter gas pressurizer is connected with the input end of the converter gas pipeline, and the output end of the gas preheater is communicated with the output end of the converter gas pipe and then is connected with the fuel input end of the hot blast stove; the output end of the hot blast stove is connected with the chimney through the flue gas pipeline; the system further comprises:
the blast furnace gas sulfur content detection device is arranged in a blast furnace gas pipeline in front of the gas preheater and is used for detecting the sulfur content in the input blast furnace gas;
the converter gas sulfur content detection device is arranged in the converter gas pipeline and is used for detecting the sulfur content in the input converter gas;
the converter gas flow regulating device is arranged in the converter gas pipeline and is used for controlling the converter gas flow in the converter gas pipeline;
the flue gas sulfur content detection device is arranged in the flue gas pipeline and used for detecting the sulfur content in the output flue gas.
In a second aspect, the embodiment of the invention also provides a method for purifying flue gas of a blast furnace hot blast stove, which comprises the following steps:
obtaining the sulfur content of blast furnace gas in a blast furnace gas pipeline;
obtaining the sulfur content of converter gas in a converter gas pipeline;
obtaining the sulfur content of flue gas in a flue gas pipeline;
and regulating the flow of the converter gas according to the sulfur content of the blast furnace gas, the sulfur content of the converter gas and the sulfur content of the flue gas.
In a third aspect, an embodiment of the present invention further provides a flue gas cleaning device for a blast furnace hot blast stove, the device including:
the blast furnace gas sulfur content acquisition module is used for acquiring the sulfur content of the blast furnace gas in the blast furnace gas pipeline;
the converter gas sulfur content acquisition module acquires the sulfur content of the converter gas in a converter gas pipeline;
the flue gas sulfur content acquisition module is used for acquiring the sulfur content of flue gas in the flue gas pipeline;
the converter gas flow regulating module is used for regulating the flow of the converter gas according to the sulfur content of the blast furnace gas, the sulfur content of the converter gas and the sulfur content of the flue gas.
In a fourth aspect, an embodiment of the present invention further provides an electronic device, including:
one or more processors;
a memory for storing one or more programs;
when the one or more programs are executed by the one or more processors, the one or more processors implement any of the blast furnace hot blast stove flue gas cleaning methods as provided by the embodiments of the second aspect.
In a fifth aspect, embodiments of the present invention also provide a computer readable storage medium having stored thereon a computer program which when executed by a processor implements any of the blast furnace hot blast stove flue gas cleaning methods as provided in the embodiments of the first aspect.
According to the embodiment of the invention, the blast furnace gas sulfur content detection device for detecting the sulfur content of the input blast furnace gas is arranged in the blast furnace gas pipeline between the gas preheaters, the converter gas sulfur content detection device for detecting the sulfur content of the input converter gas and the converter gas flow regulating device for controlling the converter gas flow in the converter gas pipeline are arranged in the converter gas pipeline, and the flue gas sulfur content detection device for detecting the sulfur content of the output flue gas is arranged in the flue gas pipeline, so that a corresponding hot blast furnace system is constructed. The structure of the hot blast furnace system is arranged to enable the hot blast furnace system to reduce the sulfur content in the flue gas discharged in the blast furnace ironmaking process by controlling the flow of converter gas in a corresponding converter gas pipeline based on the acquired sulfur content in the blast furnace gas, the converter gas and the output flue gas, so that the problems of higher cost and generation of new waste caused by the chemical purification of the sulfur dioxide in the discharged flue gas are solved, and the method effectively reduces the cost required for reducing the sulfur dioxide discharge while reducing the sulfur dioxide content in the corresponding flue gas.
Drawings
FIG. 1A is a schematic diagram of a blast furnace hot blast stove system according to an embodiment of the present invention;
FIG. 1B is a schematic diagram of another blast furnace hot blast stove system according to an embodiment of the present invention;
fig. 2 is a flow chart of a flue gas purifying device of a blast furnace hot blast stove provided by a second embodiment of the invention;
FIG. 3 is a flow chart of a flue gas purifying device of a blast furnace hot blast stove provided by a third embodiment of the invention;
fig. 4 is a schematic structural diagram of a flue gas purifying device for a blast furnace hot blast stove according to a fourth embodiment of the present invention;
fig. 5 is a schematic structural diagram of an electronic device according to a fifth embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Example 1
Fig. 1A is a schematic structural diagram of a blast furnace hot blast stove system according to an embodiment of the present invention, where the system is applicable to reducing the concentration of sulfur dioxide in the exhaust flue gas during blast furnace ironmaking. Referring to FIG. 1A, the stove system comprises: a blast furnace gas pipeline 1, a converter gas pipeline 2, a gas preheater 3, a converter gas pressurizer 4, a hot blast stove 5, a flue gas pipeline 6 and a chimney 7; the gas preheater 3 is connected between the blast furnace gas pipeline 1 and the hot blast stove 5; the converter gas pressurizer 4 is connected with the input end of the converter gas pipeline 2, and the output end of the gas preheater 3 is communicated with the output end of the converter gas pipe and then is connected with the fuel input end of the hot blast stove 5.
Furthermore, the system further comprises:
the blast furnace gas sulfur content detection device 8 is arranged in the blast furnace gas pipeline 1 in front of the gas preheater 3 and is used for detecting the sulfur content in the input blast furnace gas;
the converter gas sulfur content detection device 9 is arranged in the converter gas pipeline 2 and is used for detecting the sulfur content in the input converter gas;
a converter gas flow rate regulating device 10 installed in the converter gas pipe 2 for controlling a converter gas flow rate in the converter gas pipe 2;
and the flue gas sulfur content detection device 11 is arranged in the flue gas pipeline 6 and is used for detecting the sulfur content in the output flue gas.
The sulfur content detection device 8 for blast furnace gas may be an analyzer for detecting sulfur content in blast furnace gas. The sulfur content detection device 9 for converter gas may be an analyzer for detecting sulfur content in converter gas. The sulfur content detection device 11 of the flue gas can be used for detecting sulfur in the flue gasAnalytical instrument for measuring the amount. The sulfur content may be SO contained in the gas 2 Is a concentration of (3). The flue gas may be the gas that is removed by the stove 5 during the iron making process. The converter gas flow rate adjustment device 10 may be a valve for adjusting the flow rate of the converter gas. The valve can be a manual valve or an automatic valve.
In the related art, in performing blast furnace ironmaking, the fuels that can be used for the hot air furnace 5 include: at least one of blast furnace gas, converter gas, coke oven gas, and the like. Wherein SO in blast furnace gas 2 The concentration may be 50-70 (mg/m) 3 ) The heat value can be 3000-3500KJ/m 3 . SO in converter gas 2 The concentration may be 8 to 10 (mg/m 3), and the calorific value may be 6000 to 7000KJ/m3. SO in coke oven gas 2 Concentration: 60 to 70 (mg/m 3), heat value: 17000-17500 KJ/m3.
In particular, the respective blast furnace gas and converter gas may be input into the hot blast stove 5 to perform the respective iron-making operations. Correspondingly, the blast furnace gas pipeline 1 can convey corresponding blast furnace gas to the hot blast stove 5, and the converter gas pipeline 2 can input corresponding converter gas to the hot blast stove 5. When the corresponding blast furnace gas is input through the blast furnace gas pipeline 1, the sulfur content in the blast furnace gas can be detected based on the preset blast furnace gas sulfur content detection device 8, and the blast furnace gas is preheated through the corresponding gas preheater 3, so that the preheated blast furnace gas is input into the hot blast stove 5. When the corresponding converter gas is fed through the converter gas line 2, the sulfur content in the converter gas can be detected based on the preset converter gas sulfur content detection device 9. The hot blast stove 5 can perform corresponding iron making operations according to the obtained blast furnace gas and converter gas, and in the iron making process, corresponding flue gas is generated, passes through the flue gas pipeline 6 and finally is discharged through the chimney 7. Accordingly, the sulfur content in the flue gas can be detected by the flue gas sulfur content detection device 11 in the process of discharging the flue gas from the flue gas pipeline 6. The corresponding regulation strategy of the converter gas flow regulating device 10 is matched according to the detected sulfur content in the blast furnace gas, the sulfur content in the converter gas and the sulfur content in the flue gas by the pre-established mapping relation among the sulfur content in the blast furnace gas, the sulfur content in the converter gas, the sulfur content in the flue gas and the regulation strategies of the corresponding converter gas flow regulating device 10, and the flow of the converter gas in the converter gas pipeline 2 is controlled according to the regulation strategies. Optionally, in order to further reduce the cost of iron making of the corresponding hot blast stove 5, a certain amount of coke oven gas may be input into the hot blast stove 5.
Fig. 1B is a schematic diagram illustrating a structure of another blast furnace hot blast stove system according to the first embodiment of the present invention. Referring to fig. 1B, the system may further include a combustion-supporting gas pipe 12, a temperature measuring device, a combustion-supporting blower 13, and a combustion-supporting gas adjusting device 14;
the output end of the combustion-supporting fan 13 is connected with the gas input end of the hot blast stove 5 through the combustion-supporting gas pipeline 12; the combustion-supporting gas regulating device 14 is connected in the combustion-supporting gas pipe 12;
the combustion-supporting gas regulating device 14 is used for controlling the flow rate of the combustion-supporting gas in the combustion-supporting gas pipeline 12;
the temperature measuring device is used for detecting the vault temperature of the hot blast stove 5.
The combustion gas line 12 may be a line for feeding combustion gas, such as air, into the stove 5. The temperature measuring device may be a temperature sensor or the like. The combustion fan 13 may be a fan that feeds a corresponding combustion gas into the combustion conduit.
Specifically, the corresponding combustion-supporting gas can be input into the hot blast stove 5 through the combustion-supporting blower 13, and the flow rate of the input combustion-supporting gas is controlled according to the preset combustion-supporting gas adjusting device 14 in the combustion-supporting gas pipeline 12, so that the hot blast stove 5 can perform corresponding iron-making operation according to the acquired combustion-supporting gas, blast furnace gas and converter gas. Correspondingly, in the process of iron making of the hot blast stove 5, the vault temperature of the hot blast stove 5 can be detected through a preset temperature measuring device, and the combustion-supporting gas adjusting device 14 is controlled according to the pre-established mapping relation between the vault temperature of the hot blast stove 5 and the combustion-supporting gas flow.
It can be appreciated that by arranging the corresponding combustion-supporting gas pipeline 12, the temperature measuring device, the combustion-supporting fan 13 and the combustion-supporting gas adjusting device 14, combustion-supporting gas with corresponding flow can be input based on the vault temperature of the hot blast stove 5 in the iron making process of the hot blast stove 5 based on the corresponding blast furnace gas and converter gas, so that the vault temperature of the corresponding hot blast stove 5 can be ensured to be below the upper temperature limit value, the danger of the hot blast stove 5 in the operation process caused by overhigh vault temperature is avoided, and the safe operation of the hot blast stove 5 is ensured while the sulfur dioxide content in the corresponding flue gas is reduced.
Illustratively, the system may further include a controller;
the controller is connected with the converter gas flow regulating device 10 and is used for controlling the valve opening of the converter gas flow regulating device 10; and/or the number of the groups of groups,
the controller is connected with the combustion-supporting gas adjusting device 14 and is used for adjusting the valve opening of the combustion-supporting gas adjusting device 14.
The controller may be an independent control device for controlling the opening of the valve of the converter gas flow rate adjustment device 10, or may be the corresponding converter gas flow rate adjustment device 10 itself, and is not particularly limited herein.
Specifically, the controller may correspondingly adjust the valve opening of the combustion gas adjusting device 14 according to the determined adjustment strategy of the converter gas flow adjusting device 10, for example, may adjust the valve opening to be larger or smaller. Correspondingly, in the process of iron making of the hot blast stove 5, the vault temperature of the hot blast stove 5 can be detected through a preset temperature measuring device, and the valve opening of the combustion-supporting gas regulating device 14 is controlled through a corresponding controller according to the pre-established mapping relation between the vault temperature of the hot blast stove 5 and the combustion-supporting gas flow.
It can be understood that the controller is used for correspondingly controlling the valve opening of the valve opening combustion-supporting gas regulating device 14 of the converter gas flow regulating device 10, so that the automatic regulation of the corresponding converter gas flow and combustion-supporting gas flow is realized, the corresponding valve opening is not required to be manually regulated, and the regulation efficiency of the corresponding converter gas flow and combustion-supporting gas flow is further effectively improved.
According to the embodiment of the invention, the blast furnace gas sulfur content detection device for detecting the sulfur content of the input blast furnace gas is arranged in the blast furnace gas pipeline between the gas preheaters, the converter gas sulfur content detection device for detecting the sulfur content of the input converter gas and the converter gas flow regulating device for controlling the converter gas flow in the converter gas pipeline are arranged in the converter gas pipeline, and the flue gas sulfur content detection device for detecting the sulfur content of the output flue gas is arranged in the flue gas pipeline, so that a corresponding hot blast furnace system is constructed. The structure of the hot blast furnace system is arranged to enable the hot blast furnace system to reduce the sulfur content in the flue gas discharged in the blast furnace ironmaking process by controlling the flow of converter gas in a corresponding converter gas pipeline based on the acquired sulfur content in the blast furnace gas, the converter gas and the output flue gas, so that the problems of higher cost and generation of new waste caused by the chemical purification of the sulfur dioxide in the discharged flue gas are solved, and the method effectively reduces the cost and the practicability required for reducing the sulfur dioxide discharge while reducing the sulfur dioxide content in the corresponding flue gas.
Example two
Fig. 2 is a flow chart of a flue gas purifying method for a blast furnace hot blast stove according to a second embodiment of the present invention, where the present embodiment is applicable to reducing the concentration of sulfur dioxide in the flue gas discharged during blast furnace ironmaking. The method can be implemented by a blast furnace hot blast stove flue gas cleaning device, which can be implemented in a software and/or hardware mode and can be configured in electronic equipment. Referring to fig. 2, the method specifically includes the following steps:
s210, obtaining the sulfur content of the blast furnace gas in the blast furnace gas pipeline.
In particular, the corresponding blast furnace gas can be fed into the hot blast stove through the blast furnace gas pipeline. Correspondingly, in the process of inputting the blast furnace gas, the sulfur content in the blast furnace gas can be detected through a blast furnace gas sulfur content detection device which is preset in a corresponding blast furnace gas pipeline, so as to obtain the sulfur content in the input blast furnace gas.
S220, obtaining the sulfur content of the converter gas in the converter gas pipeline.
In particular, the corresponding converter gas can be fed into the hot blast stove via a converter gas line. Accordingly, in the process of inputting the converter gas, the sulfur content in the converter gas can be detected by a converter gas sulfur content detection device preset in a corresponding converter gas pipeline so as to obtain the sulfur content in the input converter gas.
S230, obtaining the sulfur content of the flue gas in the flue gas pipeline.
Specifically, the hot blast stove may perform a corresponding iron-making operation after obtaining the corresponding blast furnace gas and converter gas. Accordingly, during the iron making process, corresponding fumes are emitted, which may be discharged through the fume duct and by the corresponding chimney. In the process of discharging the flue gas, the sulfur content of the corresponding flue gas can be detected through a flue gas sulfur content detection device preset in a flue gas pipeline, so that the sulfur content in the corresponding flue gas can be obtained.
S240, adjusting the flow of the converter gas according to the sulfur content of the blast furnace gas, the sulfur content of the converter gas and the sulfur content of the flue gas.
Specifically, a mapping relation among the blast furnace gas sulfur content, the converter gas sulfur content, the flue gas sulfur content and the converter gas flow corresponding regulation strategy can be established in advance. Correspondingly, based on the mapping relation, the detected sulfur content of the blast furnace gas, the detected sulfur content of the converter gas and the detected sulfur content of the flue gas can be matched with a corresponding regulation strategy of the converter gas flow, and the converter gas flow regulating device is controlled to regulate the flow of the corresponding converter gas according to the regulation strategy.
According to the embodiment of the invention, the sulfur content of the blast furnace gas in the blast furnace gas pipeline, the sulfur content of the converter gas in the converter gas pipeline and the sulfur content of the flue gas in the flue gas pipeline are obtained, and the flow of the converter gas is regulated according to the sulfur content of the blast furnace gas, the sulfur content of the converter gas and the sulfur content of the flue gas, so that the reduction of the sulfur dioxide content in the flue gas discharged in the blast furnace ironmaking process is realized, the problems of higher cost and generation of new waste caused by the chemical realization of the purification of the sulfur dioxide in the discharged flue gas are avoided, the reduction of the sulfur dioxide content in the corresponding flue gas is realized, the cost required in the process of reducing the sulfur dioxide discharge is effectively reduced, and the practicability is higher.
Example III
Fig. 3 is a flowchart of a flue gas purifying method for a blast furnace hot blast stove according to a third embodiment of the present invention, which is further optimized based on the above embodiments.
Further, the method comprises the steps of adjusting the flow rate of converter gas to be' according to the sulfur content of blast furnace gas, the sulfur content of converter gas and the sulfur content of flue gas, refining to determine the difference value between the sulfur content of flue gas and the sulfur content of standard emission, and determining the gas ratio between the blast furnace gas and the converter gas; and adjusting the flow rate of the converter gas according to the sulfur content of the blast furnace gas, the sulfur content of the converter gas and the gas ratio so as to perfect an adjusting mechanism of the flow rate of the corresponding converter gas.
Referring to fig. 3, the method specifically includes the following reference steps:
s310, obtaining the sulfur content of the blast furnace gas in the blast furnace gas pipeline.
S320, obtaining the sulfur content of the converter gas in the converter gas pipeline.
S330, obtaining the sulfur content of the flue gas in the flue gas pipeline.
S340, determining a difference value between the sulfur content of the flue gas and the sulfur content of the standard emission, and determining a gas ratio between the blast furnace gas and the converter gas.
The standard emission sulfur content can be a preset standard value of the sulfur content in the dischargeable flue gas.
Specifically, a mapping relationship between a difference between the sulfur content of the flue gas and the standard emission sulfur content and a gas ratio between the corresponding blast furnace gas and converter gas may be preset. Correspondingly, based on the mapping relation, the corresponding gas duty ratio can be matched according to the determined difference value between the sulfur content of the flue gas and the sulfur content of the standard emission, and the matched gas duty ratio is used as the gas duty ratio between the corresponding blast furnace gas and the converter gas.
S350, adjusting the flow of the converter gas according to the sulfur content of the blast furnace gas, the sulfur content of the converter gas and the gas ratio.
Specifically, a mapping relation among the blast furnace gas sulfur content, converter gas sulfur content, gas duty ratio and converter gas flow corresponding regulation strategies can be established in advance. Correspondingly, based on the mapping relation, the corresponding regulating strategy can be matched according to the determined sulfur content of the blast furnace gas, the sulfur content of the converter gas and the gas ratio, and the flow of the corresponding converter gas can be regulated based on the regulating strategy.
Illustratively, the method may further comprise: obtaining the vault temperature of the hot blast stove; and adjusting the flow of the combustion-supporting gas in the combustion-supporting gas pipeline according to the temperature of the vault.
Specifically, a map between the dome temperature and the flow rate of the combustion-supporting gas may be established in advance. Correspondingly, based on the mapping relation, the corresponding combustion-supporting gas flow can be matched according to the obtained vault temperature of the hot blast stove, and the corresponding combustion-supporting gas adjusting device is controlled to adjust the combustion-supporting gas flow according to the difference between the combustion-supporting gas flow and the current flow of the combustion-supporting gas input into the hot blast stove.
It can be understood that by obtaining the vault temperature of the hot blast stove and adjusting the flow of the combustion-supporting gas in the combustion-supporting gas pipeline according to the vault temperature, in the process that the hot blast stove ironmaking is carried out based on the corresponding blast furnace gas and converter gas, the combustion-supporting gas with the corresponding flow can be input based on the vault temperature of the hot blast stove, so that the heat released in the combustion process of the blast furnace gas and the converter gas in the hot blast stove can be adjusted, the occurrence of dangerous situations caused by the too high vault temperature due to the too much heat released in the combustion process is avoided, and the safe operation of the hot blast stove is ensured while the content of sulfur dioxide in the corresponding flue gas is reduced.
Illustratively, adjusting the flow of the combustion-supporting gas in the combustion-supporting gas duct according to the dome temperature may include: determining the flow regulation quantity of the combustion-supporting gas according to the difference value between the vault temperature and the standard vault temperature; and adjusting the flow of the combustion-supporting gas in the combustion-supporting gas pipeline according to the flow adjustment quantity.
The standard vault temperature can be the highest temperature value that the set vault can bear in the design process of the hot blast stove.
Specifically, a map relationship between the difference between the dome temperature and the standard dome temperature and the flow rate adjustment amount of the corresponding combustion-supporting gas may be established in advance. Accordingly, based on the map, the corresponding flow adjustment amount of the combustion-supporting gas can be matched according to the determined difference between the dome temperature and the standard dome temperature. And adjusting the flow of the combustion-supporting gas in the combustion-supporting gas pipeline through a corresponding combustion-supporting gas adjusting device according to the matched flow adjusting quantity of the combustion-supporting gas.
It can be understood that the flow adjustment quantity of the combustion-supporting gas is determined according to the difference value of the dome temperature and the standard dome temperature, and the flow of the combustion-supporting gas in the combustion-supporting gas pipeline is adjusted according to the flow adjustment quantity, so that when the combustion-supporting gas is input into the corresponding hot blast stove, the specific difference value between the current dome temperature and the standard dome temperature can be combined to carry out targeted adjustment on the flow of the corresponding combustion-supporting gas, the situation that the dome temperature of the hot blast stove continuously exceeds the corresponding standard dome temperature in the iron making process is avoided, and the safe operation of the hot blast stove is effectively ensured while the sulfur dioxide content in the corresponding flue gas is reduced.
According to the embodiment of the invention, the gas ratio between the blast furnace gas and the converter gas is determined by determining the difference between the sulfur content of the flue gas and the standard emission sulfur content, and the flow of the converter gas is regulated according to the sulfur content of the blast furnace gas, the sulfur content of the converter gas and the gas ratio. According to the method, in the process of adjusting the converter gas flow, the corresponding gas duty ratio can be determined according to the difference between the flue gas sulfur content and the standard emission sulfur content, so that the accurate adjustment of the corresponding converter gas flow is realized, the condition that the adjustment fails due to the fact that the corresponding converter gas flow is adjusted without referencing the corresponding standard emission sulfur content is avoided, and the accuracy of the corresponding converter gas adjustment is further effectively improved.
Example IV
Fig. 4 is a schematic structural diagram of a flue gas purifying device for a blast furnace hot blast stove according to a fourth embodiment of the present invention, where the present embodiment is applicable to reducing the concentration of sulfur dioxide in the flue gas discharged during blast furnace ironmaking. The device may be implemented in software and/or hardware, and may be configured in an electronic device. Referring to fig. 4, the apparatus includes:
a blast furnace gas sulfur content acquisition module 410 for acquiring the sulfur content of the blast furnace gas in the blast furnace gas pipeline;
the converter gas sulfur content acquisition module 420 acquires the sulfur content of the converter gas in a converter gas pipeline;
the flue gas sulfur content acquisition module 430 is used for acquiring the sulfur content of flue gas in the flue gas pipeline;
the converter gas flow rate adjusting module 440 is configured to adjust a converter gas flow rate according to the sulfur content of the blast furnace gas, the sulfur content of the converter gas, and the sulfur content of the flue gas.
According to the embodiment of the invention, the sulfur content of the blast furnace gas in the blast furnace gas pipeline, the sulfur content of the converter gas in the converter gas pipeline and the sulfur content of the flue gas in the flue gas pipeline are obtained, and the flow of the converter gas is regulated according to the sulfur content of the blast furnace gas, the sulfur content of the converter gas and the sulfur content of the flue gas, so that the reduction of the sulfur dioxide content in the flue gas discharged in the blast furnace ironmaking process is realized, the problems of higher cost and generation of new waste caused by the chemical realization of the purification of the sulfur dioxide in the discharged flue gas are avoided, the reduction of the sulfur dioxide content in the corresponding flue gas is realized, the cost required in the process of reducing the sulfur dioxide discharge is effectively reduced, and the practicability is higher.
Optionally, the converter gas flow regulation module 440 may include:
the gas duty ratio determining unit is used for determining the difference value between the sulfur content of the flue gas and the standard emission sulfur content and determining the gas duty ratio between the blast furnace gas and the converter gas;
and the converter gas flow regulating unit is used for regulating the flow of the converter gas according to the sulfur content of the blast furnace gas, the sulfur content of the converter gas and the gas duty ratio.
Optionally, the apparatus may further include:
the vault temperature acquisition module is used for acquiring the vault temperature of the hot blast stove;
and the combustion-supporting gas flow regulating module is used for regulating the flow of the combustion-supporting gas in the combustion-supporting gas pipeline according to the temperature of the vault.
Optionally, the combustion-supporting gas flow rate adjustment module may include:
a flow adjustment amount determining unit for determining a flow adjustment amount of the combustion-supporting gas according to a difference between the dome temperature and a standard dome temperature;
and the combustion-supporting gas flow regulating unit is used for regulating the flow of the combustion-supporting gas in the combustion-supporting gas pipeline according to the flow regulating quantity.
The blast furnace hot blast stove flue gas purification device disclosed by the embodiment of the invention can execute any blast furnace hot blast stove flue gas purification method provided by the embodiment of the invention, and has the corresponding functional modules and beneficial effects of executing the blast furnace hot blast stove flue gas purification method. Reference is made to the description of any method embodiment of the invention for details not described in this embodiment.
Example five
Fig. 5 shows a schematic diagram of the structure of an electronic device 10 that may be used to implement an embodiment of the invention. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. Electronic equipment may also represent various forms of mobile devices, such as personal digital processing, cellular telephones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.
As shown in fig. 5, the electronic device 10 includes at least one processor 11, and a memory, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, etc., communicatively connected to the at least one processor 11, in which the memory stores a computer program executable by the at least one processor, and the processor 11 may perform various appropriate actions and processes according to the computer program stored in the Read Only Memory (ROM) 12 or the computer program loaded from the storage unit 18 into the Random Access Memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 may also be stored. The processor 11, the ROM 12 and the RAM 13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to bus 14.
Various components in the electronic device 10 are connected to the I/O interface 15, including: an input unit 16 such as a keyboard, a mouse, etc.; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information/data with other devices via a computer network, such as the internet, and/or various telecommunication networks.
The processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, digital Signal Processors (DSPs), and any suitable processor, controller, microcontroller, etc. The processor 11 performs the various methods and processes described above, such as the blast furnace hot blast stove flue gas cleaning method.
In some embodiments, the blast furnace stove flue gas cleaning method may be implemented as a computer program, which is tangibly embodied in a computer readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 10 via the ROM 12 and/or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the blast furnace stove flue gas cleaning method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the blast furnace stove flue gas cleaning method by any other suitable means (e.g. by means of firmware).
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuit systems, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems On Chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.
A computer program for carrying out methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be implemented. The computer program may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) through which a user can provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic input, speech input, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such background, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.
The computing system may include clients and servers. The client and server are typically remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical hosts and VPS service are overcome.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (7)
1. A blast furnace hot blast stove system comprises a blast furnace gas pipeline, a converter gas pipeline, a gas preheater, a converter gas pressurizer, a hot blast stove, a flue gas pipeline and a chimney; the gas preheater is connected between the blast furnace gas pipeline and the hot blast stove; the converter gas pressurizer is connected with the input end of the converter gas pipeline, and the output end of the gas preheater is communicated with the output end of the converter gas pipe and then is connected with the fuel input end of the hot blast stove; the output end of the hot blast stove is connected with the chimney through the flue gas pipeline; characterized in that the system further comprises:
the blast furnace gas sulfur content detection device is arranged in a blast furnace gas pipeline in front of the gas preheater and is used for detecting the sulfur content in the input blast furnace gas;
the converter gas sulfur content detection device is arranged in the converter gas pipeline and is used for detecting the sulfur content in the input converter gas;
the converter gas flow regulating device is arranged in the converter gas pipeline and is used for controlling the converter gas flow in the converter gas pipeline;
the flue gas sulfur content detection device is arranged in the flue gas pipeline and is used for detecting the sulfur content in the output flue gas;
the system also comprises a combustion-supporting gas pipeline, a temperature measuring device, a combustion-supporting fan and a combustion-supporting gas adjusting device;
the output end of the combustion-supporting fan is connected with the gas input end of the hot blast stove through the combustion-supporting gas pipeline; the combustion-supporting gas adjusting device is connected in the combustion-supporting gas pipeline;
the combustion-supporting gas adjusting device is used for controlling the flow of the combustion-supporting gas in the combustion-supporting gas pipeline;
the temperature measuring device is used for detecting the vault temperature of the hot blast stove;
wherein the dome temperature is a basis for adjusting the flow of combustion-supporting gas in the combustion-supporting gas duct; correspondingly, the adjusting the flow rate of the combustion-supporting gas in the combustion-supporting gas pipeline comprises:
determining the flow regulation quantity of the combustion-supporting gas according to the difference value between the vault temperature and the standard vault temperature; wherein the standard vault temperature is the highest temperature value which can be born by the set vault in the design process of the hot blast stove;
and adjusting the flow of the combustion-supporting gas in the combustion-supporting gas pipeline according to the flow adjustment quantity.
2. The system of claim 1, wherein the system comprises a controller;
the controller is connected with the converter gas flow regulating device and is used for controlling the valve opening of the converter gas flow regulating device; and/or the number of the groups of groups,
the controller is connected with the combustion-supporting gas adjusting device and used for adjusting the valve opening of the combustion-supporting gas adjusting device.
3. A blast furnace stove flue gas cleaning method, applied to a stove system according to any one of claims 1-2, the method comprising:
obtaining the sulfur content of blast furnace gas in a blast furnace gas pipeline;
obtaining the sulfur content of converter gas in a converter gas pipeline;
obtaining the sulfur content of flue gas in a flue gas pipeline;
regulating the flow of the converter gas according to the sulfur content of the blast furnace gas, the sulfur content of the converter gas and the sulfur content of the flue gas;
wherein the method further comprises:
obtaining the vault temperature of the hot blast stove;
determining the flow regulation quantity of the combustion-supporting gas according to the difference value between the vault temperature and the standard vault temperature; wherein the standard vault temperature is the highest temperature value which can be born by the set vault in the design process of the hot blast stove;
and adjusting the flow of the combustion-supporting gas in the combustion-supporting gas pipeline according to the flow adjustment quantity.
4. A method according to claim 3, wherein said adjusting the converter gas flow according to the blast furnace gas sulfur content, the converter gas sulfur content and the flue gas sulfur content comprises:
determining the difference between the sulfur content of the flue gas and the sulfur content of the standard emission, and determining the gas ratio between the blast furnace gas and the converter gas;
and regulating the flow of the converter gas according to the sulfur content of the blast furnace gas, the sulfur content of the converter gas and the gas ratio.
5. A blast furnace hot blast stove flue gas cleaning device, characterized by comprising:
the blast furnace gas sulfur content acquisition module is used for acquiring the sulfur content of the blast furnace gas in the blast furnace gas pipeline;
the converter gas sulfur content acquisition module acquires the sulfur content of the converter gas in a converter gas pipeline;
the flue gas sulfur content acquisition module is used for acquiring the sulfur content of flue gas in the flue gas pipeline;
the converter gas flow regulating module is used for regulating the flow of the converter gas according to the sulfur content of the blast furnace gas, the sulfur content of the converter gas and the sulfur content of the flue gas;
the vault temperature acquisition module is used for acquiring the vault temperature of the hot blast stove;
a combustion-supporting gas flow regulation module comprising:
a flow adjustment amount determining unit for determining a flow adjustment amount of the combustion-supporting gas according to a difference between the dome temperature and a standard dome temperature; wherein the standard vault temperature is the highest temperature value which can be born by the set vault in the design process of the hot blast stove;
and the combustion-supporting gas flow regulating unit is used for regulating the flow of the combustion-supporting gas in the combustion-supporting gas pipeline according to the flow regulating quantity.
6. An electronic device, comprising:
one or more processors;
a memory for storing one or more programs;
when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement a blast furnace hot blast stove flue gas cleaning method as claimed in any one of claims 3 to 4.
7. A computer-readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements a method for cleaning flue gases from a blast furnace hot blast stove according to any one of claims 3-4.
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| CN202210847170.8A CN115232903B (en) | 2022-07-07 | 2022-07-07 | Blast furnace hot blast stove system and flue gas purification method, device, equipment and medium thereof |
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| JP2003129119A (en) * | 2001-10-17 | 2003-05-08 | Nippon Steel Corp | Method for feeding fuel gas into hot-blast stove |
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| CN114686629A (en) * | 2022-04-02 | 2022-07-01 | 武汉钢铁有限公司 | Reduce SO in blast furnace hot blast stove flue gas2Method of discharging |
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| JP2003129119A (en) * | 2001-10-17 | 2003-05-08 | Nippon Steel Corp | Method for feeding fuel gas into hot-blast stove |
| JP2012193403A (en) * | 2011-03-16 | 2012-10-11 | Ihi Corp | Hot air generating device |
| CN105349724A (en) * | 2015-12-03 | 2016-02-24 | 江苏永钢集团有限公司 | Converter gas blending combustion device for hot blast furnaces |
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