CN213507039U - Blast furnace damping down diffusing gas purifying and recovering device - Google Patents
Blast furnace damping down diffusing gas purifying and recovering device Download PDFInfo
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- CN213507039U CN213507039U CN202022538800.2U CN202022538800U CN213507039U CN 213507039 U CN213507039 U CN 213507039U CN 202022538800 U CN202022538800 U CN 202022538800U CN 213507039 U CN213507039 U CN 213507039U
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Abstract
The utility model relates to a purifying and recycling device for blast furnace damping-down and diffusing coal gas, which comprises a filter and a cyclone dust collector; the gas inlet of the filter can be communicated with the upper part of the blast furnace or the gravity dust collector, the gas outlet of the filter can be communicated with a first gas recovery pipeline or a second gas recovery pipeline, a buffer tank and a Roots blower are arranged on the first gas recovery pipeline, and the outlets of the first gas recovery pipeline and the second gas recovery pipeline are both communicated with a clean gas pipe network; the inlet of the cyclone dust collector can be communicated with the top of the blast furnace, and the outlet of the cyclone dust collector is communicated with the atmosphere. The utility model discloses can effectively retrieve damping and diffuse coal gas, furthest reduces coal gas and smoke and dust and gets into the atmosphere, reduces air pollution, realizes environmental protection production.
Description
Technical Field
The utility model relates to a coal gas purification retrieves technical field, especially relates to a blast furnace damping down diffuses coal gas purification recovery unit.
Background
The blast furnace is a closed high-pressure reactor filled with furnace charge and coal gas. In the smelting process of the blast furnace, a large amount of coal gas is diffused outwards from the top of the furnace, such as the uniform pressure diffusion of the top of the furnace and the blowing-down diffusion of the blast furnace. At present, the enterprise focuses on the treatment of the top diffused gas of the blast furnace on the pressure equalizing diffused gas, the top pressure equalizing diffused gas recovery technology is mature, and most of domestic blast furnaces adopt the technology to effectively treat the diffused gas in the top pressure equalizing discharge process.
However, in the production process of the blast furnace, when the furnace body cooling equipment, the tuyere equipment or the furnace shutdown maintenance are replaced, the damping down operation is carried out when the production is required to be stopped, the damping down of the blast furnace is generally divided into damping down in the scheduled maintenance and damping down in the special emergency, because the damping-down times are not many, generally 4 to 6 times all the year around, and the process is a coal gas dangerous operation, and has certain potential safety hazard, the commonly used method of the steel enterprises at present is that the pressure ratio of the top coal gas is higher in the early stage of damping-down coal gas diffusion, the top coal gas is purified by a dry coal gas dust removal system and then recycled into a clean coal gas pipe network, when the pressure of the furnace top gas is reduced to about 30KPa, in order to improve the gas discharge speed and reduce the damping-down time, a stop valve between a blast furnace crude gas system and a dry gas dedusting system is closed, and the gas in the furnace is diffused into the atmosphere through a furnace top diffusing valve, so that larger noise and particle pollution are brought; the blast furnace blowing-down and diffusing coal gas contains a large amount of coke powder, ore powder and toxic gas, which causes serious pollution to the atmosphere, and the method is contrary to green production.
Therefore, the inventor provides a purification and recovery device for the blast furnace damping-down and diffusing coal gas by virtue of experience and practice of related industries for many years, so as to overcome the defects in the prior art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a blast furnace damping down diffuses coal gas purification recovery unit can effectively retrieve damping down and diffuse coal gas, and furthest reduces coal gas and smoke and dust and gets into the atmosphere, reduces air pollution, realizes environmental protection production.
The utility model aims to realize the purification and recovery device of the blast furnace damping-down diffused gas, which comprises a filter and a cyclone dust collector; the gas inlet of the filter can be communicated with the upper part of the blast furnace or the gravity dust collector, the gas outlet of the filter can be communicated with a first gas recovery pipeline or a second gas recovery pipeline, a buffer tank and a Roots blower are arranged on the first gas recovery pipeline, and the outlets of the first gas recovery pipeline and the second gas recovery pipeline are both communicated with a clean gas pipe network; the inlet of the cyclone dust collector can be communicated with the top of the blast furnace, and the outlet of the cyclone dust collector is communicated with the atmosphere.
In a preferred embodiment of the present invention, the inlet of the cyclone dust collector is communicated with the top bleeding pipe, the top bleeding pipe is communicated with the top of the blast furnace through the top gas rising pipe, and the gravity dust collector is communicated with the top of the blast furnace through the top gas rising pipe; the furnace top gas ascending pipe is provided with CO/O2Content analyzer, said CO/O2The content analyzer is used for controlling the connection and disconnection of the first gas recovery pipeline and the second gas recovery pipeline in an interlocking mode.
In a preferred embodiment of the present invention, a gas inlet pipeline is connected to an air inlet of the filter, a first gas branch pipe and a second gas branch pipe are connected in parallel to the gas inlet pipeline, the first gas branch pipe is connected to an upper portion of the blast furnace, and a first shut-off valve is disposed on the first gas branch pipe; the second gas branch pipe is communicated with the upper part of the gravity dust collector, and a second stop valve is arranged on the second gas branch pipe.
In a preferred embodiment of the present invention, a third cut-off valve is disposed on the first gas recovery line between the filter and the buffer tank; a fourth stop valve is arranged on the first gas recovery pipeline between the buffer tank and the Roots blower; and a fifth stop valve is arranged on the first gas recovery pipeline between the Roots blower and the clean gas pipe network.
In a preferred embodiment of the present invention, a sixth cut-off valve is disposed on the second gas recovery line.
In a preferred embodiment of the present invention, the furnace top diffusing pipe is communicated with the inlet of the cyclone dust collector through a diffusing connecting pipeline, and a seventh cut-off valve is arranged on the diffusing connecting pipeline.
In a preferred embodiment of the present invention, the filter is a bag-type dust collector.
The utility model discloses a in a preferred embodiment, when the furnace top pressure of blast furnace was 30KPa ~ 20KPa, the air inlet of filter passes through gravity dust collector intercommunication blast furnace, the gas outlet of filter passes through second coal gas recovery pipeline intercommunication clean gas pipe network.
The utility model discloses an in a preferred embodiment, when the furnace top pressure of blast furnace was 20KPa ~ 100Pa, the air inlet of filter passes through gravity dust collector intercommunication blast furnace, the gas outlet of filter passes through first gas recovery pipeline the buffer tank with roots's fan intercommunication clean gas pipe network.
In a preferred embodiment of the present invention, when the top pressure of the blast furnace is less than 100Pa, the inlet of the cyclone is communicated with the top of the blast furnace through a gas riser.
In a preferred embodiment of the present invention, after the top of the blast furnace is ignited, the top diffusing pipe is communicated with the top of the blast furnace through the gas ascending pipe, and the top diffusing pipe is disconnected from the cyclone dust collector.
From top to the utility model provides a blast furnace damping-down diffuses coal gas purification recovery unit has following beneficial effect:
the utility model provides a blast furnace damping-down diffused gas purification recovery device, which can effectively solve the problem of diffused gas treatment in the production process of the blast furnace, and the purification recovery rate of the diffused gas of the blast furnace is close to 100%; the utility model can recover the diffused gas, and can create value for the recovered gas again, thereby bringing considerable economic benefit; the utility model can reduce the dust emission of the blast furnace, reduce the air pollution, avoid the emission of poisonous coal gas to the atmosphere to the maximum extent, and is beneficial to environmental protection; the utility model has the advantages of simple equipment, easy arrangement, safe work and convenient operation.
Drawings
The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:
FIG. 1: is a schematic diagram of the blast furnace damping-down diffusion coal gas purification and recovery device of the utility model.
In the figure:
100. a blast furnace damping down and diffusing coal gas purifying and recycling device;
1. a filter; 11. a first gas recovery line; 12. a second gas recovery line; 13. a gas inlet conduit; 131. a first gas branch pipe; 132. a second gas branch pipe;
2. a cyclone dust collector;
3. a blast furnace; 31. a top gas riser; 32. CO/O2A content analyzer;
4. a gravity dust collector;
5. a buffer tank;
6. a Roots blower;
7. a net gas pipe network;
8. a furnace top diffusing pipe; 81. a relief connecting pipe;
91. a first shut-off valve; 92. a second shut-off valve; 93. a third shut-off valve; 94. a fourth shut-off valve; 95. a fifth cut-off valve; 96. a sixth cut-off valve; 97. and a seventh cut-off valve.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.
The specific embodiments of the present invention described herein are for the purpose of explanation only and should not be construed as limiting the invention in any way. Given the teachings of the present invention, the skilled person can conceive of any possible variants based on the invention, which should all be considered as belonging to the scope of the invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, indirect connections through intermediaries, and the like. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, the utility model provides a purification and recovery device 100 for blast furnace damping-down and diffused gas, which comprises a filter 1 and a cyclone dust collector 2; the gas inlet of the filter 1 can be communicated with the upper part of the blast furnace 3 or the gravity dust collector 4 (the gravity dust collector 4 is communicated with the blast furnace 3, the prior art), the gas outlet of the filter 1 can be communicated with a first gas recovery pipeline 11 or a second gas recovery pipeline 12, a buffer tank 5 and a Roots blower 6 are arranged on the first gas recovery pipeline 11, and the outlets of the first gas recovery pipeline 11 and the second gas recovery pipeline 12 are communicated with a clean gas pipe network 7; the inlet of the cyclone 2 can be connected to the top of the blast furnace 3 and the outlet of the cyclone 2 is connected to the atmosphere.
The utility model provides a blast furnace damping-down diffused gas purification recovery device, which can effectively solve the problem of diffused gas treatment in the production process of the blast furnace, and the purification recovery rate of the diffused gas of the blast furnace is close to 100%; the utility model can recover the diffused gas, and can create value for the recovered gas again, thereby bringing considerable economic benefit; the utility model can reduce the dust emission of the blast furnace, reduce the air pollution, avoid the emission of poisonous coal gas to the atmosphere to the maximum extent, and is beneficial to environmental protection; the utility model has the advantages of simple equipment, easy arrangement, safe work and convenient operation.
Further, as shown in fig. 1, an inlet of the cyclone dust collector 2 is communicated with a furnace top diffusing pipe 8, the furnace top diffusing pipe 8 is communicated with the top of the blast furnace 3 through a furnace top gas ascending pipe 31, and the gravity dust collector 4 is communicated with the top of the blast furnace 3 through the furnace top gas ascending pipe 31; the top gas riser 31 is provided with CO/O2Content analyzer 32 (carbon monoxide/oxygen content analyzer), CO/O2The content analyzer 32 is used for controlling the connection and disconnection of the first gas recovery pipeline 11 and the second gas recovery pipeline 12 in an interlocking way.
CO/O2The content analyzer 32 is a gas recovery commander by which the blast furnace off-gas is analyzed on-line to determine when the gas has recovery conditions, and therefore CO/O2The adjustment and online working state of the content analyzer 32 play an important role in the coal gas recovery process. When CO/O2Content analyzer 32 for CO and O in coal gas in blast furnace damping-down process2When the content analysis of (2) meets the requirements of set parameters, the method has recoverable conditions.
Further, as shown in fig. 1, a gas inlet pipeline 13 is arranged at the gas inlet of the filter 1 in a communicating manner, a first gas branch pipe 131 and a second gas branch pipe 132 are arranged on the gas inlet pipeline 13 in parallel, the first gas branch pipe 131 is communicated with the upper part of the blast furnace 3, and a first cut-off valve 91 is arranged on the first gas branch pipe 131; the second gas branch pipe 132 is communicated with the upper part of the gravity dust collector 4, and a second cut-off valve 92 is arranged on the second gas branch pipe 132.
Further, a third cut-off valve 93 is arranged between the filter 1 and the buffer tank 5 on the first gas recovery pipeline 11; a fourth cut-off valve 94 is arranged between the buffer tank 5 and the Roots blower 6 on the first gas recovery pipeline 11; a fifth stop valve 95 is arranged on the first gas recovery pipeline 11 and between the roots blower 6 and the clean gas pipe network 7.
Further, as shown in fig. 1, a sixth shut-off valve 96 is provided on the second gas recovery line 12.
Further, as shown in fig. 1, the furnace top bleeding pipe 8 is communicated with the inlet of the cyclone 2 through a bleeding connection pipe 81, and a seventh shut valve 97 is provided on the bleeding connection pipe 81.
In the present embodiment, the filter 1 is a bag-type dust collector.
The recovery pressure of the blast furnace blowing-down and diffusing coal gas is 30KPa, the design pressure of the system pressure is 350KPa, and the system flow is 35000Nm3/h。
When the blast furnace stops blowing, for the process that the top pressure of the blast furnace is reduced to 0KPa from 30KPa (at the moment, the stop valves of a blast furnace crude gas system and a dry gas dust removal system are closed), the operation can be divided into three stages of 30 KPa-20 KPa, 20 KPa-100 Pa and less than 100Pa according to the top pressure of the blast furnace;
when the top pressure of the blast furnace 3 is 30 KPa-20 KPa, the air inlet of the filter 1 is communicated with the blast furnace 3 through the gravity dust collector 4, and CO/O2The content analyzer 32 controls the first cut-off valve 91, the second cut-off valve 92 and the sixth cut-off valve 96 to be opened in an interlocking mode, other cut-off valves are closed, and the gas outlet of the filter 1 is directly communicated with the clean gas pipe network 7 through the second gas recovery pipeline 12. Coal gas enters the filter 1 through a first coal gas branch pipe 131, a second coal gas branch pipe 132 and a coal gas inlet pipeline 13 which are connected with the blast furnace 3 and the gravity dust collector 4 (an upper straight cylinder section), is purified and dedusted by the filter 1, and directly enters the clean coal gas pipe network 7.
When the top pressure of the blast furnace is 20 KPa-100 Pa, the air inlet of the filter 1 is communicated with the blast furnace 3 through the gravity dust collector 4, and CO/O2The content analyzer 32 interlockingly controls the first cut-off valve 91, the second cut-off valve 92, the sixth cut-off valve 96, the third cut-off valve 93, the fourth cut-off valve 94 and the fifth cut-off valve 95 to be opened, the other cut-off valves to be closed, and the filter to be closedThe gas outlet of the gas recovery device 1 is communicated with a clean gas pipe network 7 through a first gas recovery pipeline 11, a buffer tank 5 and a Roots blower 6. Coal gas enters the filter 1 through a first coal gas branch pipe 131, a second coal gas branch pipe 132 and a coal gas inlet pipeline 13 which are connected with the blast furnace 3 and the gravity dust collector 4 (upper straight cylinder section), is purified and dedusted by the filter 1, enters the Roots blower 6 through the buffer tank 5 for pressurization, and then enters the clean coal gas pipe network 7.
CO/O when the top pressure of the blast furnace 3 is less than 100Pa2The content analyzer 32 controls the seventh cut-off valve 97 to be opened in an interlocking way, other cut-off valves are closed, and the inlet of the cyclone dust collector 2 is communicated with the top of the blast furnace 3 through a coal gas ascending pipe. The coal gas enters the cyclone dust collector 2 through the furnace top diffusion pipe 8 and the diffusion connecting pipeline 81, and is discharged into the atmosphere after being subjected to dust removal and purification.
After the top of the blast furnace is ignited, each cut-off valve is closed, the top bleeding pipe 8 is communicated with the top of the blast furnace 3 through a gas ascending pipe, and the top bleeding pipe 8 and the cyclone dust collector 2 are arranged in a disconnected mode. After the furnace top of the blast furnace is ignited, the generated flue gas is diffused through the furnace top diffusing pipe 8.
The utility model discloses can realize retrieving the purification of diffusing coal gas to blast furnace damping down, furthest avoids the emission with poisonous coal gas in to the atmosphere, has reduced air pollution, and the feasibility is strong.
From top to the utility model provides a blast furnace damping-down diffuses coal gas purification recovery unit has following beneficial effect:
the utility model provides a blast furnace damping-down diffused gas purification recovery device, which can effectively solve the problem of diffused gas treatment in the production process of the blast furnace, and the purification recovery rate of the diffused gas of the blast furnace is close to 100%; the utility model can recover the diffused gas, and can create value for the recovered gas again, thereby bringing considerable economic benefit; the utility model can reduce the dust emission of the blast furnace, reduce the air pollution, avoid the emission of poisonous coal gas to the atmosphere to the maximum extent, and is beneficial to environmental protection; the utility model has the advantages of simple equipment, easy arrangement, safe work and convenient operation.
The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any person skilled in the art should also realize that such equivalent changes and modifications can be made without departing from the spirit and principles of the present invention.
Claims (11)
1. A blast furnace damping down diffused gas purification recovery device is characterized by comprising a filter and a cyclone dust collector; the gas inlet of the filter can be communicated with the upper part of the blast furnace or the gravity dust collector, the gas outlet of the filter can be communicated with a first gas recovery pipeline or a second gas recovery pipeline, a buffer tank and a Roots blower are arranged on the first gas recovery pipeline, and the outlets of the first gas recovery pipeline and the second gas recovery pipeline are both communicated with a clean gas pipe network; the inlet of the cyclone dust collector is communicated with the top of the blast furnace, and the outlet of the cyclone dust collector is communicated with the atmosphere.
2. The blast furnace damping-down diffusion gas purification and recovery device as claimed in claim 1, wherein an inlet of the cyclone dust collector is communicated with a furnace top diffusion pipe, the furnace top diffusion pipe is communicated with the top of the blast furnace through a furnace top gas ascending pipe, and the gravity dust collector is communicated with the top of the blast furnace through the furnace top gas ascending pipe; the furnace top gas ascending pipe is provided with CO/O2Content analyzer, said CO/O2The content analyzer is used for controlling the connection and disconnection of the first gas recovery pipeline and the second gas recovery pipeline in an interlocking mode.
3. The blast furnace damping-down diffusion gas purification and recovery device as claimed in claim 1 or 2, wherein a gas inlet of the filter is communicated with a gas inlet pipeline, a first gas branch pipe and a second gas branch pipe are arranged on the gas inlet pipeline in parallel, the first gas branch pipe is communicated with the upper part of the blast furnace, and a first cut-off valve is arranged on the first gas branch pipe; the second gas branch pipe is communicated with the upper part of the gravity dust collector, and a second stop valve is arranged on the second gas branch pipe.
4. The purification and recovery device for the blast furnace damping-down diffused gas as claimed in claim 1 or 2, wherein a third cut-off valve is arranged on the first gas recovery line between the filter and the buffer tank; a fourth stop valve is arranged on the first gas recovery pipeline between the buffer tank and the Roots blower; and a fifth stop valve is arranged on the first gas recovery pipeline between the Roots blower and the clean gas pipe network.
5. The blast furnace damping-down diffusion gas purification and recovery device as claimed in claim 4, wherein a sixth cut-off valve is arranged on the second gas recovery pipeline.
6. The blast furnace damping-down diffusion gas purification and recovery device as claimed in claim 2, wherein the furnace top diffusion pipe is communicated with the inlet of the cyclone dust collector through a diffusion connecting pipeline, and a seventh cut-off valve is arranged on the diffusion connecting pipeline.
7. The blast furnace damping-down diffused gas purification and recovery device as claimed in claim 1 or 2, wherein the filter is a bag-type dust remover.
8. The purification and recovery device for the blast furnace damping-down and dispersing gas as claimed in claim 1 or 2, wherein when the top pressure of the blast furnace is 30-20 KPa, the gas inlet of the filter is communicated with the blast furnace through a gravity dust collector, and the gas outlet of the filter is communicated with a clean gas pipe network through the second gas recovery pipeline.
9. The purification and recovery device for the blow-down and diffused gas of the blast furnace as claimed in claim 1 or 2, wherein when the top pressure of the blast furnace is 20KPa to 100Pa, the gas inlet of the filter is communicated with the blast furnace through a gravity dust collector, and the gas outlet of the filter is communicated with a clean gas pipe network through the first gas recovery pipeline, the buffer tank and the roots blower.
10. The blast furnace damping-down dispersion gas purification and recovery device as claimed in claim 2, wherein when the top pressure of the blast furnace is less than 100Pa, the inlet of the cyclone dust collector is communicated with the top of the blast furnace through a gas riser.
11. The blast furnace damping-down diffusion gas purification and recovery device as claimed in claim 2, wherein after the top of the blast furnace is ignited, the top diffusion pipe is communicated with the top of the blast furnace through a gas ascending pipe, and the top diffusion pipe is disconnected from the cyclone dust collector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022538800.2U CN213507039U (en) | 2020-11-05 | 2020-11-05 | Blast furnace damping down diffusing gas purifying and recovering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022538800.2U CN213507039U (en) | 2020-11-05 | 2020-11-05 | Blast furnace damping down diffusing gas purifying and recovering device |
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| Publication Number | Publication Date |
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| CN213507039U true CN213507039U (en) | 2021-06-22 |
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|---|---|---|---|
| CN202022538800.2U Active CN213507039U (en) | 2020-11-05 | 2020-11-05 | Blast furnace damping down diffusing gas purifying and recovering device |
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| Country | Link |
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| CN (1) | CN213507039U (en) |
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