CN101195766A - Coal gas anhydrous dust collecting equipment of revolving furnace and technique thereof - Google Patents
Coal gas anhydrous dust collecting equipment of revolving furnace and technique thereof Download PDFInfo
- Publication number
- CN101195766A CN101195766A CNA2008100001460A CN200810000146A CN101195766A CN 101195766 A CN101195766 A CN 101195766A CN A2008100001460 A CNA2008100001460 A CN A2008100001460A CN 200810000146 A CN200810000146 A CN 200810000146A CN 101195766 A CN101195766 A CN 101195766A
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- Prior art keywords
- coal gas
- heat boiler
- waste heat
- converter
- dust collecting
- Prior art date
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- 239000003034 coal gas Substances 0.000 title claims abstract description 53
- 239000000428 dust Substances 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title abstract description 13
- 239000002918 waste heat Substances 0.000 claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000007599 discharging Methods 0.000 claims abstract description 10
- 238000011084 recovery Methods 0.000 claims abstract description 9
- 239000002956 ash Substances 0.000 claims description 20
- 239000007789 gas Substances 0.000 claims description 20
- 230000005855 radiation Effects 0.000 claims description 15
- 238000003672 processing method Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000000498 cooling water Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 238000004062 sedimentation Methods 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 2
- 239000010881 fly ash Substances 0.000 claims description 2
- 238000009628 steelmaking Methods 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000001816 cooling Methods 0.000 description 5
- 239000010802 sludge Substances 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- BKVIYDNLLOSFOA-UHFFFAOYSA-N thallium Chemical compound [Tl] BKVIYDNLLOSFOA-UHFFFAOYSA-N 0.000 description 2
- 229910052716 thallium Inorganic materials 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 241001504664 Crossocheilus latius Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910001651 emery Inorganic materials 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000010977 jade Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 230000009885 systemic effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Landscapes
- Chimneys And Flues (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention relates to a converter coal gas non-water dust removing equipment, which comprises a converter, a radiant type waste-heat boiler, an adjusting valve, a cyclone dust remover, a bag-type dust remover, a coal gas temperature controlling device, a flow meter, a main induced draft fan, a three-way valve, an emission chimney, a rotary water seal, a U-shaped water seal, and a coal gas tank. The invention is characterized in that a convection type waste-heat boiler is connected between the outlet position of the radiant type waste-heat boiler and the adjusting valve, and the convection type waste-heat boiler is composed of a settling chamber, a heat exchange component, a baffle plate, a box body, and an ash discharging opening. A process method comprises the steps that converter coal gas comes into the convection type waste-heat boiler via radiant type waste-heat boiler after recovery waste heat, the gravitational settling is performed to come into the adjusting valve, and the bag-type dust remover, etc to perform dust fining removal after the recovery waste heat, the emission is performed through the three-way valve or the converter coal gas comes into the coal gas tank to perform coal gas recovery, and the invention has the advantage that the energy consumption is reduced through recovering heat energy.
Description
Technical field:
The present invention relates to make steel utility appliance and Technology field thereof, particularly relate to a kind of coal gas anhydrous dust collecting equipment of revolving furnace and processing method thereof.
Background technology:
Existing coal gas of converter dust removal installation and processing method thereof mainly contain two kinds, a kind of is to remove dust recovery system with the wet type coal gas of converter that Japanese OG method is representative, its main technique comprises traditional " literary composition+two literary compositions " system, spray column+downstriker circumferential weld venturi system, spray column+upstriker circumferential weld venturi system, its primary structure has experienced adjustable aditus laryngis formula (P-A), movable reprint formula (RD), circumferential weld is heavily cut or polish jade with an emery wheel formula updates such as (RSW), and its major equipment is by Venturi meter, cooling tower, the circumferential weld Venturi meter, water trap, the water smoke separator, under meter, induced draft fan, T-valve, water processing establishment, gas chamber, compositions such as water seal.200710004934.2 application for a patent for invention provides a kind of state-of-the-art OG wet method coal gas of converter dedusting technology, mainly comprise spray column+upstriker circumferential weld venturi system, its advantage is: use the single sprinkler head of giving at the flue center, reduce the drag losses of air-flow, make water smoke even, stable, help the combination of water, gas; The flow of flue gas direction is a upstriker, unnecessary mechanical water is difficult for being taken away by air-flow, help the circumferential weld aditus laryngis and effectively play a role, heavy thallium is the inversion type cone, forms circumferential weld with the Venturi meter expansion segment, can effectively increase the length of circumferential weld, and the length of shortening transmission rod, helping the position adjustments of heavy thallium and be difficult for making dust heavily condensing below the stone roller, aditus laryngis is dust stratification not, can obviously improve the field of flow of air-flow, improve the efficiency of dust collection of aditus laryngis.But, the shortcoming that OG method wet type coal gas of converter removes the dust recovery system existence is: owing to adopt the water-cooling pattern cooling, a large amount of heat energy in the coal gas are lost and have been reduced the calorific value of coal gas, strengthen the power of main induced draft fan under the same conditions, having increased energy consumption also needs huge waterworks and sewage, sludge treating system.Another kind is to remove dust recovery system with the dry type coal gas of converter that German LT method is representative, and comparing with above-mentioned wet method system does not need sludge treating system, and systemic resistance is little, the power reduction of main induced draft fan, and efficiency of dust collection improves.But, in the dry method coal gas of converter dust collecting process device systems that uses at present, the coal gas of high temperature that comes out from converter evaporation cooling air flue adopts the mode of water spray to lower the temperature wet cooling tower, can make a large amount of heat energy in the coal gas be lost and make vapour content increasing in the coal gas, reduce the calorific value and the use value of coal gas; The power of main induced draft fan is strengthened, increased energy expenditure.
Summary of the invention:
The purpose of this invention is to provide a kind of sewage and sludge treating system of not needing, can reclaim the anhydrous coal gas of converter dust removal installation and the processing method of heat energy, minimizing energy consumption.
Technical solution of the present invention is to realize like this, a kind of coal gas anhydrous dust collecting equipment of revolving furnace is provided, comprise converter, the radiation formula waste heat boiler that is connected with converter, by pipeline variable valve connected to one another, tornado dust collector, sack cleaner, the gas temperature control device, under meter, main induced draft fan, T-valve, diffuse chimney, the rotation water seal, the water seal of U type, gas chamber, it is characterized in that: between the exit of radiation formula waste heat boiler and variable valve by the fixedly connected convection type waste heat boiler of pipeline, the convection type waste heat boiler is by settling pocket, convection heat-exchange chamber, heat-exchanging component, dividing plate, casing, ash discharging hole is formed, in settling pocket A, be provided with assisted heating device, at settling pocket A, settling pocket B and tornado dust collector, the ash discharging hole that is respectively equipped with of the below of sack cleaner, the below of ash discharging hole are respectively installed an ash exhauster.Its feature is that also heat-exchanging component has the 2-3 group; Settling pocket is formed by 1-4; Be provided with the steam insulation facility in the sack cleaner; Heat-exchanging component is installed in the flue of air-flow rising, vertically arranges along air flow line, and has automatic ash removing device; The ash handling equipment of convection type waste heat boiler, tornado dust collector and sack cleaner all adopts the nitrogen-sealed ash handling equipment; In radiation formula waste heat boiler and convection type waste heat boiler, be provided with explosion-proof equipment.
Provide a kind of coal gas of converter anhydrous dust separating processing method, it is characterized in that: the coal gas of high temperature that converter produces, behind the radiation formula waste heat boiler, the part heat is passed to indirect cooling water produce steam, reclaimed, gas temperature is reduced to 900～1000 ℃ after the heat exchange, enter the convection type waste heat boiler then, in settling pocket A and settling pocket B, coal gas is through 2～3 subgravity sedimentations, simultaneously through 2～3 convection type heat-exchanging components, produce the vapor recovery waste heat, make gas temperature be reduced to 250～300 ℃, after coal gas comes out from the convection type waste heat boiler, enter the variable valve that is used to regulate converter mouth elementary errors pressure, enter high efficiency cyclonic dust collector subsequently, the high-efficiency cloth bag fly-ash separator carries out smart dedusting, and coal gas passes through temperature-control device, under meter, main induced draft fan, T-valve, diffuse chimney, the rotation water seal, the water seal of U type enters gas chamber and carries out coal-gas recovering.
Implementation result of the present invention is: owing to adopted coal gas anhydrous dust collecting equipment of revolving furnace and processing method, do not need to provide sewage and sludge treating system, can reclaim the heat energy that coal gas of converter produces, improve utilization rate of heat value, reduce energy consumption.
Description of drawings:
Fig. 1 is a kind of coal gas anhydrous dust collecting equipment of revolving furnace of the embodiment of the invention and process diagram thereof
In the accompanying drawing: 1. converter; 2. radiation formula waste heat boiler; 3. assisted heating device; 4. convection type waste heat boiler; 5. casing; 6. settling pocket A; 7. ash discharging hole; 8. nitrogen-sealed ash exhauster; 9. convection heat-exchange chamber A; 10. heat-exchanging component; 11. dividing plate; 12. settling pocket B; 13. convection heat-exchange chamber B; 14. variable valve; 15. tornado dust collector; 16. sack cleaner; 17. gas temperature control device; 18. under meter; 19. main induced draft fan; 20. diffuse chimney; 21. T-valve; 22. rotation water seal; 23.U type water seal; 24. gas chamber.
Embodiment:
Below in conjunction with accompanying drawing the embodiment of the invention is described in further detail:
Embodiment:
Fig. 1 is the schematic diagram of mechanism among a kind of coal gas anhydrous dust collecting equipment of revolving furnace of the present invention and the processing method embodiment, as shown in Figure 1, the method of this inventive embodiments is as follows: the coal gas of high temperature that converter 1 produces, reclaimed through behind the radiation formula waste heat boiler 2 the part heat being passed to indirect cooling water generation steam, gas temperature is reduced to 900～1000 ℃ after the heat exchange, enter convection type waste heat boiler 4 then, settling pocket 6 at convection type waste heat boiler 4, coal gas is through 2 subgravity sedimentations in 12, and in convection heat-exchange chamber 9, after producing the vapor recovery waste heats and make gas temperature be reduced to 250～300 ℃ through 2 convection type heat-exchanging components in 13, coal gas enters and is used to regulate the variable valve 14 that the converter mouth elementary errors is pressed, enter tornado dust collector 15 again, coal gas enters sack cleaner 16 and carries out smart dedusting then, guarantees to be reduced to 10mg/Nm from the dust content of gas that sack cleaner 16 comes out
3After following, coal gas enters temperature-control device 17, under meter 18, main induced draft fan 19, diffuses chimney and diffuse by entering after T-valve 21 commutations, or enters gas chamber after rotation water seal 22, the U type water seal 23 and carry out coal-gas recovering by entering after T-valve 21 commutations.
The equipment of this inventive embodiments is as shown in Figure 1: the inlet of radiation formula waste heat boiler 2 is connected with the outlet of converter 1, between the exit of radiation formula waste heat boiler 2 and variable valve 14 by the fixedly connected convection type waste heat boiler 4 of pipeline, casing 5 inner-use clapboards 11 of convection type waste heat boiler 4 are partitioned into 6,12 and two convection heat- exchange chamber 9,13 of two settling pockets, one group of heat-exchanging component 10 respectively is installed in that two convective heat exchanges are indoor, heat-exchanging component is installed in the flue of air-flow rising, vertically arrange along air flow line, and have automatic ash removing device.In settling pocket 6, be provided with assisted heating device 3, assisted heating device 3 adopts high efficient radiation pipe indirect heating, at settling pocket 6,12 and tornado dust collector 15, the below of sack cleaner 16 be respectively equipped with ash discharging hole, a nitrogen-sealed ash handling equipment 8 is respectively installed in the below of ash discharging hole, the outlet of convection type waste heat boiler 4 is connected with variable valve 14, and what be connected successively with variable valve 14 is tornado dust collector 15, sack cleaner 16, gas temperature control device 17, under meter 18, main induced draft fan 19, T-valve 21, diffuse chimney 20, rotation water seal 22, U type water seal 23, gas chamber 24.In sack cleaner 16, be provided with the steam insulation facility; In radiation formula waste heat boiler 2 and convection type waste heat boiler 4, be provided with explosion-proof equipment; Take airtight the connection between high efficient radiation pipe 2 and the convection type waste heat boiler 4.
Claims (8)
1. coal gas anhydrous dust collecting equipment of revolving furnace, comprise converter (1), the radiation formula waste heat boiler (2) that is connected with converter (1), by pipeline variable valve connected to one another (14), tornado dust collector (15), sack cleaner (16), gas temperature control device (17), under meter (18), main induced draft fan (19), T-valve (21), diffuse chimney (20), rotation water seal (22), U type water seal (23), gas chamber (24), it is characterized in that: between the exit of radiation formula waste heat boiler (2) and variable valve (14) by the fixedly connected convection type waste heat boiler of pipeline (4), convection type waste heat boiler (4) is by settling pocket (6), (12), convection heat-exchange chamber (9), (13), heat-exchanging component (10), dividing plate (11), casing (5), ash discharging hole (7) is formed, in settling pocket (6), be provided with assisted heating device (3), in settling pocket (6), (12) and tornado dust collector (15), the below of sack cleaner (16) be respectively equipped with ash discharging hole, an ash exhauster (8) is respectively installed in the below of ash discharging hole.
2. a kind of coal gas anhydrous dust collecting equipment of revolving furnace according to claim 1 is characterized in that heat-exchanging component (10) has the 2-3 group.
3. a kind of coal gas anhydrous dust collecting equipment of revolving furnace according to claim 1 is characterized in that settling pocket (6) is made up of 1-4.
4. a kind of coal gas anhydrous dust collecting equipment of revolving furnace according to claim 1 is characterized in that being provided with the steam insulation facility in the sack cleaner (16).
5. a kind of coal gas anhydrous dust collecting equipment of revolving furnace according to claim 1 is characterized in that heat-exchanging component (10) is installed in the flue of air-flow rising, vertically arranges along air flow line, and has automatic ash removing device.
6. a kind of coal gas anhydrous dust collecting equipment of revolving furnace according to claim 1 is characterized in that the ash handling equipment of convection type waste heat boiler (4), tornado dust collector (15) and sack cleaner (16) all adopts nitrogen-sealed ash handling equipment (8).
7. a kind of coal gas anhydrous dust collecting equipment of revolving furnace according to claim 1 is characterized in that being provided with explosion-proof equipment in radiation formula waste heat boiler (2) and convection type waste heat boiler (4).
8. anhydrous dust separating processing method of coal gas of converter, it is characterized in that: the coal gas of high temperature that converter (1) steel-making produces, behind radiation formula waste heat boiler (2), the part heat is passed to indirect cooling water produce steam, reclaimed, gas temperature is reduced to 900～1000 ℃ after the heat exchange, enter convection type waste heat boiler (4) then, in settling pocket A (6) and settling pocket B (12), coal gas is through 2～3 subgravity sedimentations, simultaneously through 2～3 convection type heat-exchanging components (10), produce the vapor recovery waste heat, make gas temperature be reduced to 250～300 ℃, after coal gas comes out from convection type waste heat boiler (4), enter the variable valve (14) that is used to regulate converter mouth elementary errors pressure, enter high efficiency cyclonic dust collector (15) subsequently, high-efficiency cloth bag fly-ash separator (16) carries out smart dedusting, and coal gas is by temperature-control device (17), under meter (18), main induced draft fan (19), T-valve (21), diffuse chimney (20), rotation water seal (22), U type water seal (23) enters gas chamber (24) and carries out coal-gas recovering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100001460A CN101195766B (en) | 2008-01-04 | 2008-01-04 | Coal gas anhydrous dust collecting equipment of revolving furnace and technique thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100001460A CN101195766B (en) | 2008-01-04 | 2008-01-04 | Coal gas anhydrous dust collecting equipment of revolving furnace and technique thereof |
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| CN101195766A true CN101195766A (en) | 2008-06-11 |
| CN101195766B CN101195766B (en) | 2010-10-13 |
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| CN2008100001460A Active CN101195766B (en) | 2008-01-04 | 2008-01-04 | Coal gas anhydrous dust collecting equipment of revolving furnace and technique thereof |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101851695A (en) * | 2010-05-17 | 2010-10-06 | 尹华勤 | Dry bag-type coal gas purifying and recycling process for oxygen-resistant converter |
| CN102243025A (en) * | 2011-06-20 | 2011-11-16 | 北京中冶设备研究设计总院有限公司 | Process and device for recycling flue gas afterheat of electric furnace |
| CN102312038A (en) * | 2011-06-20 | 2012-01-11 | 北京中冶设备研究设计总院有限公司 | Converter gas water-free explosionproof dedusting process and equipment |
| CN102321779A (en) * | 2011-10-14 | 2012-01-18 | 孙慕文 | Converter smoke radiation type waste heat boiler recovery system |
| CN102344987A (en) * | 2011-10-31 | 2012-02-08 | 中冶南方工程技术有限公司 | Primary flue gas dry dedusting process for vanadium recovering converter |
| CN101781586B (en) * | 2010-01-29 | 2013-06-26 | 上海锅炉厂有限公司 | High-temperature synthesis gas sensible heat recovery device |
| CN103657261A (en) * | 2013-11-29 | 2014-03-26 | 安徽六国化工股份有限公司 | Gravity settling chamber for monoammonium phosphate tail gas dustfall |
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| CN105062571A (en) * | 2015-08-05 | 2015-11-18 | 华陆工程科技有限责任公司 | Coal-prepared coal gas energy-conservation and emission-reduction method and device |
| CN105087082A (en) * | 2015-08-28 | 2015-11-25 | 安徽国能亿盛环保科技有限公司 | Waste gas purification apparatus |
| CN105543442A (en) * | 2016-02-29 | 2016-05-04 | 北京志能祥赢节能环保科技股份有限公司 | Method and system for treating converter flue gas passing by evaporative cooling pipeline |
| CN105603148A (en) * | 2015-12-24 | 2016-05-25 | 北京热盾节能技术有限公司 | Pure-dry bag dedusting system and process capable of recycling flue gas waste heat of steelmaking converter |
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| CN116904693A (en) * | 2023-05-12 | 2023-10-20 | 中国重型机械研究院股份公司 | Converter flue gas dry dedusting system and method with standby fan switching mechanism |
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| CN101781586B (en) * | 2010-01-29 | 2013-06-26 | 上海锅炉厂有限公司 | High-temperature synthesis gas sensible heat recovery device |
| CN101851695A (en) * | 2010-05-17 | 2010-10-06 | 尹华勤 | Dry bag-type coal gas purifying and recycling process for oxygen-resistant converter |
| CN102243025B (en) * | 2011-06-20 | 2013-07-10 | 北京中冶设备研究设计总院有限公司 | Process and device for recycling flue gas afterheat of electric furnace |
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| CN102344987B (en) * | 2011-10-31 | 2013-09-18 | 中冶南方工程技术有限公司 | Primary flue gas dry dedusting process for vanadium recovering converter |
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| CN103657261B (en) * | 2013-11-29 | 2015-11-18 | 安徽六国化工股份有限公司 | For the gravity settling chamber of MAP tail gas depositing dust |
| CN103657261A (en) * | 2013-11-29 | 2014-03-26 | 安徽六国化工股份有限公司 | Gravity settling chamber for monoammonium phosphate tail gas dustfall |
| CN104001402A (en) * | 2014-06-13 | 2014-08-27 | 龙飞 | Off-gas treatment system |
| CN105062571A (en) * | 2015-08-05 | 2015-11-18 | 华陆工程科技有限责任公司 | Coal-prepared coal gas energy-conservation and emission-reduction method and device |
| CN105087082A (en) * | 2015-08-28 | 2015-11-25 | 安徽国能亿盛环保科技有限公司 | Waste gas purification apparatus |
| CN105603148A (en) * | 2015-12-24 | 2016-05-25 | 北京热盾节能技术有限公司 | Pure-dry bag dedusting system and process capable of recycling flue gas waste heat of steelmaking converter |
| CN105543442A (en) * | 2016-02-29 | 2016-05-04 | 北京志能祥赢节能环保科技股份有限公司 | Method and system for treating converter flue gas passing by evaporative cooling pipeline |
| CN108485723A (en) * | 2018-04-24 | 2018-09-04 | 东北大学 | A kind of inflammable and explosive inorganization emission coal gas recycling system and technique |
| CN108485723B (en) * | 2018-04-24 | 2021-06-08 | 东北大学 | A kind of flammable and explosive unorganized scattered gas recovery and utilization system and process |
| CN113003786A (en) * | 2021-03-26 | 2021-06-22 | 马鞍山钢铁股份有限公司 | Combined treatment process for industrial gas dust removal water of CCPP unit |
| CN113003786B (en) * | 2021-03-26 | 2022-04-01 | 马鞍山钢铁股份有限公司 | A CCPP unit industrial gas dedusting water combined treatment process |
| CN116904693A (en) * | 2023-05-12 | 2023-10-20 | 中国重型机械研究院股份公司 | Converter flue gas dry dedusting system and method with standby fan switching mechanism |
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| CN101195766B (en) | 2010-10-13 |
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