CN220432862U - Blast furnace damping down and diffusing gas cascade injection recovery device - Google Patents
Blast furnace damping down and diffusing gas cascade injection recovery device Download PDFInfo
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- CN220432862U CN220432862U CN202321975436.3U CN202321975436U CN220432862U CN 220432862 U CN220432862 U CN 220432862U CN 202321975436 U CN202321975436 U CN 202321975436U CN 220432862 U CN220432862 U CN 220432862U
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- 238000002347 injection Methods 0.000 title claims abstract description 146
- 239000007924 injection Substances 0.000 title claims abstract description 146
- 238000011084 recovery Methods 0.000 title claims abstract description 92
- 238000013016 damping Methods 0.000 title claims abstract description 42
- 239000007789 gas Substances 0.000 claims description 246
- 238000005507 spraying Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 3
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 10
- 239000000428 dust Substances 0.000 description 11
- 239000003034 coal gas Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model relates to a blast furnace damping down diffuses gas cascade and draws recovery unit relates to blast furnace ironmaking technical field, including blast furnace, gas conveyer pipe, high pressure clean gas pipe, low pressure clean gas pipe and gas recovery pipe network, be provided with the cascade between high pressure clean gas pipe and the low pressure clean gas pipe and draw recovery unit, the input port of first injection pipe communicates with the output of high pressure clean gas pipe, the input port of second injection pipe communicates with the output port of first injection pipe and the output of high pressure clean gas pipe, the cascade draws recovery unit still to include high-pressure air source subassembly. Under the injection action of high-pressure gas, negative pressure is formed in the first injection pipe for gas recovery, and the mixed gas of the first injection pipe is used as working gas of the second injection pipe, so that a part of gas enters the second injection pipe from the high-pressure clean gas pipe for recovery; the method meets the requirement of recovering the blast furnace damping down and diffusing gas, and simultaneously saves the consumption of a high-pressure gas source.
Description
Technical Field
The application relates to the technical field of blast furnace ironmaking, in particular to a blast furnace damping down and diffusing gas cascade injection recovery device.
Background
The blowing down of the blast furnace means that, in order to perform some maintenance operations, such as replacement of equipment, maintenance of the blast furnace, and the like, it is necessary to temporarily stop blowing air into the blast furnace. A byproduct called blast furnace gas is generated in the blast furnace damping down process, and the blast furnace gas contains combustible gas components such as carbon monoxide, hydrogen, methane and the like which can be utilized, so that the gas generated in the blast furnace damping down process needs to be recycled.
The similar existing damping-down gas recovery system mainly comprises an ejector arranged on a blast furnace gas pipeline, and low-pressure gas in the blast furnace is conveyed into a gas pipe network to finish gas recovery by conveying high-pressure gas into the ejector to form negative pressure.
Because the blast furnace damping-down gas has the characteristics of high pressure, easy recovery, low pressure and difficult recovery when the flow rate is large, the recovery difficulty is different when the flow rate and the pressure of the blast furnace damping-down gas are changed; therefore, when the conventional ejector is adopted for recycling, the defects of high consumption of high-pressure gas and difficulty in providing corresponding gas sources for enterprises exist.
Disclosure of Invention
In order to cope with the characteristics of different recovery difficulties when the blast furnace damping-down gas changes in different flow rates and pressures, the high-pressure gas source consumption during the recovery of the blast furnace damping-down gas is reduced.
The application provides a blast furnace damping down diffuses gas cascade and draws recovery unit, adopts following technical scheme:
the blast furnace damping down and diffusing gas cascade injection recovery device comprises a blast furnace, a gas conveying pipe, a high-pressure clean gas pipe, a low-pressure clean gas pipe and a gas recovery pipe network, wherein one end of the gas conveying pipe is communicated with the blast furnace, the other end of the gas conveying pipe is communicated with the high-pressure clean gas pipe, and the low-pressure clean gas pipe is communicated with the gas recovery pipe network;
a cascade injection recovery device is arranged between the high-pressure clean gas pipe and the low-pressure clean gas pipe, the cascade injection recovery device comprises a first injection pipe and a second injection pipe, and the pipe diameter of the second injection pipe is larger than that of the first injection pipe; the input port of the first injection pipe is communicated with the output end of the high-pressure clean gas pipe, the input port of the second injection pipe is communicated with the output port of the first injection pipe and the output end of the high-pressure clean gas pipe, and the output port of the second injection pipe is communicated with the input end of the low-pressure clean gas pipe; the cascade injection recovery device further comprises a high-pressure air source assembly for providing initial injection power for the first injection pipe.
By adopting the technical scheme, when the blast furnace is in damping down, the high-pressure gas source component works, high-pressure gas is blown into the first injection pipe, and the damping down gas is conveyed to the first injection pipe and the second injection pipe through the high-pressure clean gas pipe; under the injection action of high-pressure gas, negative pressure is formed in the first injection pipe for gas recovery, and after the recovered gas is mixed with the high-pressure gas, the gas enters an input port of the second injection pipe from an output port of the first injection pipe, so that the mixed gas of the first injection pipe is used as working gas of the second injection pipe, and negative pressure is formed in the second injection pipe, so that a part of gas enters the second injection pipe from a high-pressure clean gas pipe for recovery; the method meets the requirement of recovering the blast furnace damping down and diffusing gas, and simultaneously saves the consumption of a high-pressure gas source.
Further, the input port of the first injection pipe is communicated with a recovered gas inlet pipe, a first connecting pipe is communicated between the recovered gas inlet pipe and the high-pressure clean gas pipe, a second connecting pipe is communicated between the output port of the second injection pipe and the low-pressure clean gas pipe, and gas valve groups are arranged on the first connecting pipe and the second connecting pipe.
Further, the side wall of the recovery gas inlet pipe is communicated with a bypass pipe, and the bypass pipe is communicated with the input port of the second injection pipe.
Through adopting above-mentioned technical scheme, will through setting up the bypass pipe for first injection pipe and second draw the pipe mutually independent work, it is more convenient when first injection pipe and second draw the pipe and other pipelines to install, and it is more convenient on subsequent maintenance.
Further, an on-off valve is arranged on the bypass pipe.
By adopting the technical scheme, the flow and pressure of the blast furnace gas are reduced along with the blast furnace damping down process, and the difficulty of gas recovery is gradually increased at the moment. When the negative pressure formed by the second injection pipe cannot meet the requirement of gas recovery, the on-off valve on the bypass pipe is automatically closed, and the damping-down gas is recovered by the first injection pipe. Because the high-pressure gas has higher speed when being sprayed out, the first injection pipe can form larger negative pressure, thereby meeting the requirement of recovering the blast furnace in the later period of damping down, and the blast furnace can normally stop the damping down until the pressure of the gas in the blast furnace is reduced to a set value, and the whole recovery process is finished.
Further, the first injection pipe penetrates through the second injection pipe, the second injection pipe is communicated with the first connecting pipe, and a gap exists between the pipe wall of the recovered gas inlet pipe and the inner wall of the second injection pipe.
Further, the high-pressure gas source assembly comprises a high-pressure working gas source, a high-pressure gas supply pipe and a high-pressure gas nozzle, one end of the high-pressure gas supply pipe penetrates through the pipe wall of the first injection pipe and stretches into the first injection pipe, the high-pressure gas nozzle is arranged at one end of the high-pressure gas supply pipe, which is positioned in the first injection pipe, and the input end of the high-pressure gas supply pipe is communicated with the high-pressure working gas source; and the high-pressure gas supply pipe is provided with a gas shut-off valve.
Further, the high-pressure working gas source is a high-pressure gas source, a nitrogen gas source or a steam gas source.
Further, a pressure buffer tank is arranged between the cascade injection recovery device and the gas recovery pipe network.
Further, the high-pressure working air source is a steam air source, and a spraying system for cooling steam is arranged in the pressure buffer tank.
Further, the cascade injection recovery device is at least provided with two groups in parallel.
In summary, the present application includes at least one of the following beneficial technical effects:
1. when the blast furnace is in damping down, the high-pressure gas source component works, high-pressure gas is blown into the first injection pipe, and damping down gas is conveyed to the first injection pipe and the second injection pipe through the high-pressure clean gas pipe; under the injection action of high-pressure gas, negative pressure is formed in the first injection pipe for gas recovery, and after the recovered gas is mixed with the high-pressure gas, the gas enters an input port of the second injection pipe from an output port of the first injection pipe, so that the mixed gas of the first injection pipe is used as working gas of the second injection pipe, and negative pressure is formed in the second injection pipe, so that a part of gas enters the second injection pipe from a high-pressure clean gas pipe for recovery; the method meets the requirement of recovering the blast furnace damping down and diffusing gas, and simultaneously saves the consumption of a high-pressure gas source.
2. Along with the blast furnace damping down process, the flow rate and pressure of the blast furnace gas are reduced, and the difficulty of gas recovery is gradually increased at the moment. When the negative pressure formed by the second injection pipe cannot meet the requirement of gas recovery, the on-off valve on the bypass pipe is automatically closed, and the damping-down gas is recovered by the first injection pipe. Because the high-pressure gas has higher speed when being sprayed out, the first injection pipe can form larger negative pressure, thereby meeting the requirement of recovering the blast furnace in the later period of damping down, and the blast furnace can normally stop the damping down until the pressure of the gas in the blast furnace is reduced to a set value, and the whole recovery process is finished.
Drawings
FIG. 1 is a schematic view of the overall structure of embodiment 1 of the present application;
FIG. 2 is a schematic view of a part of the structure of embodiment 1 of the present application;
fig. 3 is a schematic structural diagram of a cascade injection recovery device in embodiment 1 of the present application;
FIG. 4 is a schematic structural view of embodiment 3 of the present application;
fig. 5 is a schematic structural view of embodiment 4 of the present application;
fig. 6 is a schematic structural view of embodiment 4 of the present application.
Reference numerals illustrate: 1. a blast furnace; 21. a gas riser; 22. a gas down pipe; 23. a primary dust remover; 24. a coarse gas pipe; 25. a secondary dust remover; 31. high-pressure clean gas pipe; 311. a first connection pipe; 32. low pressure clean gas pipe; 321. a second connection pipe; 33. a gas valve group; 4. a gas recovery pipe network; 5. cascade injection recovery device; 51. a first ejector tube; 511. a recovery gas inlet pipe; 52. a second ejector tube; 53. a bypass pipe; 531. an on-off valve; 61. an energy recovery mechanism; 62. a pressure reducing valve group; 7. a high pressure gas supply assembly; 71. a high pressure working gas source; 72. a high pressure gas supply pipe; 721. a gas shut-off valve; 73. a high pressure gas nozzle; 8. a pressure buffer tank.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-6.
Example 1
The embodiment of the application discloses a blast furnace damping down and diffusing gas cascade injection recovery device.
Referring to fig. 1, a blast furnace damping down and diffusing gas cascade injection recovery device comprises a blast furnace 1, a gas conveying pipe, a high-pressure clean gas pipe 31, a low-pressure clean gas pipe 32 and a gas recovery pipe network 4, wherein one end of the gas conveying pipe is communicated with the blast furnace 1, the other end of the gas conveying pipe is communicated with the high-pressure clean gas pipe 31, and the low-pressure clean gas pipe 32 is communicated with the gas recovery pipe network 4; a cascade injection recovery device 5 is arranged between the high-pressure clean gas pipe 31 and the low-pressure clean gas pipe 32.
Referring to fig. 2, an energy recovery mechanism 61 and a pressure reducing valve group 62 are provided between the high-pressure clean gas pipe 31 and the low-pressure clean gas pipe 32, and the energy recovery mechanism 61 is a TRT or a BPRT. The energy recovery mechanism 61 and the pressure reducing valve group 62 are arranged in parallel, when the blast furnace 1 is in a normal break, the air volume and the gas volume of the blast furnace 1 are gradually reduced, and the control of the gas pressure is gradually controlled by the pressure reducing valve group 62 by the TRT or the BPRT. When the gas quantity is reduced to a set value, an air source cut-off valve is opened, and the cascade injection recovery device 5 starts to enter a working state.
Referring to fig. 1, the gas transfer pipe includes a gas rising pipe 21 and a gas falling pipe 22, the top of the blast furnace 1 is communicated with the gas rising pipe 21, and the output end of the gas rising pipe 21 is communicated with the gas falling pipe 22. In order to reduce dust in coal gas and protect environment, the output end of the coal gas descending pipe 22 is communicated with a primary dust remover 23, the output end of the primary dust remover 23 is communicated with a raw coal gas pipe 24, the output end of the raw coal gas pipe 24 is provided with a plurality of secondary dust removers 25, and the output end of the secondary dust removers 25 is communicated with the input end of a high-pressure clean coal gas pipe 31. The primary dust remover 23 and the secondary dust remover 25 may be cyclone dust removers or cloth bag dust removers.
Referring to fig. 2 and 3, the cascade injection recovery device 5 includes a first injection pipe 51 and a second injection pipe 52, the pipe diameter of the second injection pipe 52 being larger than the pipe diameter of the first injection pipe 51; the input of the first injection pipe 51 communicates with the output of the high pressure clean gas pipe 31. Specifically, the input port of the first injection pipe 51 is connected to a recovered gas inlet pipe 511, and a first connecting pipe 311 is connected between the recovered gas inlet pipe 511 and the high-pressure clean gas pipe 31. The input port of the second ejector pipe 52 is communicated with the output port of the first ejector pipe 51 and the output end of the high-pressure clean gas pipe 31, and the output port of the second ejector pipe 52 is communicated with the input end of the low-pressure clean gas pipe 32. A second connecting pipe 321 is communicated between the output port of the second injection pipe 52 and the low-pressure clean gas pipe 32.
Referring to fig. 2 and 3, a gas valve set 33 is disposed on each of the first connection pipe 311 and the second connection pipe 321, and the gas valve set 33 is a shut-off valve, and a butterfly valve and a blind plate valve may be used. The side wall of the recovery gas inlet pipe 511 is communicated with a bypass pipe 53, and the bypass pipe 53 is communicated with the input port of the second injection pipe 52. The bypass pipe 53 is provided with an on-off valve 531, and the on-off valve 531 may be a butterfly valve, a gate valve or a check valve.
Referring to fig. 2 and 3, the cascade ejector recovery apparatus 5 further includes a high pressure gas source assembly 7 for providing initial ejector power into the first ejector tube 51, the high pressure gas source assembly 7 including a high pressure working gas source 71, a high pressure gas supply tube 72 and a high pressure gas nozzle 73. One end of the high-pressure air supply pipe 72 penetrates through the pipe wall of the first injection pipe 51 and extends into the first injection pipe 51, and the high-pressure air nozzle 73 is arranged at one end of the high-pressure air supply pipe 72 located in the first injection pipe 51, and the air flow speed direction sprayed out of the high-pressure air nozzle 73 faces the second injection pipe 52. The input end of the high-pressure gas supply pipe 72 communicates with the high-pressure working gas source 71, and a gas shut-off valve 721 is provided in the high-pressure gas supply pipe 72. In the case of recovering the damping down gas, the gas shutoff valve 721 may be opened.
The high pressure working gas source 71 is a high pressure gas source, a nitrogen gas source or a steam gas source.
Along with the blast furnace 1 damping down process, the flow of the blast furnace 1 gas is reduced, the pressure is reduced, and the difficulty of gas recovery is gradually increased at the moment. When the negative pressure formed by the second injection pipe 52 cannot meet the requirement of gas recovery, the on-off valve 531 on the bypass pipe 53 is automatically closed, the on-off valve 531 can be automatically closed under the action of gas pressure or under electric control, and the damping down gas is recovered by the first injection pipe 51. Because the high-pressure gas has higher speed when being sprayed out, the first injection pipe 51 can form larger negative pressure, thereby meeting the requirement of recovering the blast furnace 1 in the later period of damping down, and the blast furnace 1 can normally stop the wind until the pressure of the gas in the blast furnace 1 is reduced to a set value, and the whole recovery process is finished.
The implementation principle of the embodiment of the application is as follows: when the blast furnace 1 is in normal operation, the gas valve groups 33 at the front end and the rear end of the cascade injection recovery device 5 are in a closed state, and at the moment, the cascade injection recovery device 5 and the gas pipe network of the blast furnace 1 are in a reliable partition state, so that the blast furnace 1 is kept in normal operation. When the blast furnace 1 is in a damping down state, the high-pressure gas source assembly 7 works, high-pressure gas is blown into the first injection pipe 51, and the damping down gas is conveyed to the first injection pipe 51 and the second injection pipe 52 through the high-pressure clean gas pipe 31; under the injection action of high-pressure gas, negative pressure is formed in the first injection pipe 51 to recover gas, and the recovered gas is mixed with the high-pressure gas and then enters the input port of the second injection pipe 52 from the output port of the first injection pipe 51, so that the mixed gas of the first injection pipe 51 is used as working gas of the second injection pipe 52, and negative pressure is formed in the second injection pipe 52, so that a part of gas enters the second injection pipe 52 from the high-pressure clean gas pipe 31 to be recovered; the method meets the requirement of recovering the blow-down and diffused gas of the blast furnace 1, and simultaneously saves the consumption of a high-pressure gas source.
At this time, since the gas from the blast furnace 1 is easily recovered, the gas having been damped enters the second ejector pipe 52 through the first ejector pipe 51 and the bypass pipe 53, and the on-off valve 531 on the bypass pipe 53 is kept in an open state by the gas. Under the jet action of high-pressure gas, the first jet pipe 51 forms negative pressure to recycle gas, the mixed gas at the outlet of the first jet pipe 51 is used as working gas of the second jet pipe 52, so that the second jet pipe 52 forms negative pressure, and part of the gas for damping down of the blast furnace 1 can enter the second jet pipe 52 through the bypass pipe 53 and enter the low-pressure clean gas pipe 32 from the output port of the second jet pipe 52 to recycle. At the moment, a cascade working mode of front and rear injection pipes is formed, only one stage of injection pipe consumes high-pressure working gas, large gas flow recovery is realized, and consumption of a high-pressure gas source is saved.
Along with the blast furnace 1 damping down process, the flow of the blast furnace 1 gas is reduced, the pressure is reduced, and the difficulty of gas recovery is gradually increased at the moment. When the negative pressure formed by the second injection pipe 52 cannot meet the requirement of gas recovery, the gas pressure in the bypass pipe 53 is reduced, the on-off valve 531 on the bypass pipe 53 is automatically closed, and the damping down gas is recovered by the first injection pipe 51. Because the high-pressure gas has higher speed when being sprayed out from the nozzle, the first injection pipe 51 can form larger negative pressure, thereby meeting the requirement of recovering the blast furnace 1 in the later period of damping down, and the blast furnace 1 can normally stop the wind until the pressure of the gas in the blast furnace 1 is reduced to a set value, and the whole recovery process is finished.
Example 2
The main difference between this embodiment and embodiment 1 is that: the first injection pipe 51 penetrates through the second injection pipe 52, the second injection pipe 52 is communicated with the first connecting pipe 311, and a gap exists between the pipe wall of the recovered gas inlet pipe 511 and the inner wall of the second injection pipe 52. In order to improve the uniformity of the air intake of the second ejector pipe 52, the first ejector pipe 51 and the second ejector pipe 52 are coaxially arranged. In actual use, the second ejector tube 52 has a stronger ejector effect, a larger gas access area, fewer bends, fewer flow rate losses and more uniform negative pressure attraction.
Example 3
Referring to fig. 4, the main difference between this embodiment and embodiment 1 is that: a pressure buffer tank 8 is arranged between the cascade injection recovery device 5 and the gas recovery pipe network 4, and in particular, the second connecting pipe 321 is provided with the pressure buffer tank 8. The gas pressure can be better stabilized in the recovery process, and the pressure impact on a downstream pipe network is reduced; meanwhile, the dehydration function is achieved, and the moisture in the coal gas is reduced.
In this embodiment, when the high pressure working gas source 71 is a steam source, the pressure buffer tank 8 can be used as a drain tank for steam condensate to reduce the amount of water entering the gas recovery line 4 even when steam is used as the working gas source. The pressure buffer tank 8 is internally provided with a spraying system for cooling steam, and the spraying system comprises a spray head arranged in the pressure buffer tank 8 and is used for spraying cooling water into the pressure buffer tank 8, so that the cooling function is achieved, the condensing effect of the steam is improved, and moisture is further reduced and enters a downstream pipe network.
Example 4
Referring to fig. 5 and 6, the main difference between this embodiment and embodiment 1 is that: the cascade ejection recovery device 5 is at least two groups arranged in parallel, in this embodiment, the cascade ejection recovery device 5 is two groups, and in other embodiments, multiple groups may be arranged. If the first injection pipe 51 and/or the second injection pipe 52 of one group of cascade injection recovery devices 5 are required to be maintained, only the gas valve groups 33 at the two ends of the cascade injection recovery devices 5 which need to be maintained are required to be closed, and the other group of cascade injection recovery devices 5 can normally perform injection recovery work. The second connection pipe 321 is provided with a pressure buffer tank 8.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (10)
1. The utility model provides a blast furnace damping down diffuses gas cascade injection recovery unit, includes blast furnace (1), gas conveying pipe, high pressure clean gas pipe (31), low pressure clean gas pipe (32) and gas recovery pipe network (4), its characterized in that: one end of the gas conveying pipe is communicated with the blast furnace (1), the other end of the gas conveying pipe is communicated with the high-pressure clean gas pipe (31), and the low-pressure clean gas pipe (32) is communicated with the gas recovery pipe network (4);
a cascade injection recovery device (5) is arranged between the high-pressure clean gas pipe (31) and the low-pressure clean gas pipe (32), the cascade injection recovery device (5) comprises a first injection pipe (51) and a second injection pipe (52), and the pipe diameter of the second injection pipe (52) is larger than that of the first injection pipe (51); the input port of the first injection pipe (51) is communicated with the output end of the high-pressure clean gas pipe (31), the input port of the second injection pipe (52) is communicated with the output port of the first injection pipe (51) and the output end of the high-pressure clean gas pipe (31), and the output port of the second injection pipe (52) is communicated with the input end of the low-pressure clean gas pipe (32); the cascade injection recovery device (5) further comprises a high-pressure air source assembly (7) for providing initial injection power for the first injection pipe (51).
2. The blast furnace damping down and diffusing gas cascade ejection recovery device according to claim 1, wherein: the utility model discloses a high-pressure clean gas pipe, including first injection pipe (51), second injection pipe (52), first connecting pipe (311), second connecting pipe (321) are equipped with in the input port intercommunication of first injection pipe (51), first connecting pipe (311) and second connecting pipe (321) are equipped with gas valves (33) between intercommunication between high-pressure clean gas pipe (31), the delivery outlet of second injection pipe (52) and low-pressure clean gas pipe (32).
3. The blast furnace damping down and diffusing gas cascade ejection recovery device according to claim 2, characterized in that: the side wall of the recovery gas inlet pipe (511) is communicated with a bypass pipe (53), and the bypass pipe (53) is communicated with the input port of the second injection pipe (52).
4. A blast furnace blow down and gas release cascade ejection recovery device according to claim 3, characterized in that: the bypass pipe (53) is provided with an on-off valve (531).
5. The blast furnace damping down and diffusing gas cascade ejection recovery device according to claim 2, characterized in that: the first injection pipe (51) is arranged in the second injection pipe (52) in a penetrating mode, the second injection pipe (52) is communicated with the first connecting pipe (311), and a gap exists between the pipe wall of the recovered gas inlet pipe (511) and the inner wall of the second injection pipe (52).
6. The blast furnace damping down and diffusing gas cascade ejection recovery device according to claim 1, wherein: the high-pressure air supply assembly (7) comprises a high-pressure working air source (71), a high-pressure air supply pipe (72) and a high-pressure air nozzle (73), one end of the high-pressure air supply pipe (72) penetrates through the pipe wall of the first injection pipe (51) and stretches into the first injection pipe (51), the high-pressure air nozzle (73) is arranged at one end, located in the first injection pipe (51), of the high-pressure air supply pipe (72), and the input end of the high-pressure air supply pipe (72) is communicated with the high-pressure working air source (71); the high-pressure gas supply pipe (72) is provided with a gas shut-off valve (721).
7. The blast furnace damping down and diffusing gas cascade ejection recovery device according to claim 6, wherein: the high-pressure working gas source (71) is a high-pressure gas source, a nitrogen gas source or a steam gas source.
8. The blast furnace damping down and diffusing gas cascade ejection recovery device according to claim 7, wherein: a pressure buffer tank (8) is arranged between the cascade injection recovery device (5) and the gas recovery pipe network (4).
9. The blast furnace damping down and diffusing gas cascade ejection recovery device according to claim 8, wherein: the high-pressure working air source (71) is a steam air source, and a spraying system for cooling steam is arranged in the pressure buffer tank (8).
10. The blast furnace damping down and diffusing gas cascade ejection recovery device according to claim 1 or 9, characterized in that: the cascade injection recovery device (5) is at least provided with two groups in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321975436.3U CN220432862U (en) | 2023-07-25 | 2023-07-25 | Blast furnace damping down and diffusing gas cascade injection recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321975436.3U CN220432862U (en) | 2023-07-25 | 2023-07-25 | Blast furnace damping down and diffusing gas cascade injection recovery device |
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| Publication Number | Publication Date |
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| CN220432862U true CN220432862U (en) | 2024-02-02 |
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| CN202321975436.3U Active CN220432862U (en) | 2023-07-25 | 2023-07-25 | Blast furnace damping down and diffusing gas cascade injection recovery device |
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| CN (1) | CN220432862U (en) |
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- 2023-07-25 CN CN202321975436.3U patent/CN220432862U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |