CN103849705A - Waste heat recycling and fine particle purifying system and method of converter gas - Google Patents
Waste heat recycling and fine particle purifying system and method of converter gas Download PDFInfo
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- CN103849705A CN103849705A CN201410074781.9A CN201410074781A CN103849705A CN 103849705 A CN103849705 A CN 103849705A CN 201410074781 A CN201410074781 A CN 201410074781A CN 103849705 A CN103849705 A CN 103849705A
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Abstract
The invention relates to a waste heat recycling and fine particle purifying system and method of converter gas. The system comprises a converter 1, a moving smoke hood 2 which is arranged at the upper part of the converter 1 and covers a molten iron feeding opening, an evaporation cooling flue 3 connected with the moving smoke hood 2 and a waste heat boiler 4 connected with the evaporation cooling flue 3 by using a boiler steel tube, wherein the waste heat boiler 4 is sequentially connected with a fine particle purifier 5, a coal gas fan 6, a switching station 7, a coal gas cooling tower 8 and a coal gas tank 10 through coal gas pipelines; the evaporation cooling flue 3 and the waste heat boiler 4 are connected with a steam energy storage device 12 by adopting the boiler steel tube. The system disclosed by the invention has the advantages that the waste heat of the converter gas can be fully recycled; the fine particle in the coal gas is effectively removed and the concentration of dust in the coal gas after the purification is less than 10mg/m<3>; the system is low in operation energy consumption, convenient in repair and maintenance, safe and reliable and free of water pollution problem and meets the requirements of energy conservation and emission reduction.
Description
Technical field
The present invention relates to recovery waste heat utilization and the dry cleaning of metallurgy industry coal gas of converter, particularly a kind of coal gas of steel-smelting revolving furnace recovery waste heat utilizes and minuteness particle purification system and method.
Background technology
Converter is a kind of smelting equipment of steel-making, in molten steel decarburization process, produces coal gas of high temperature, and in coal gas, containing a large amount of minuteness particles can not directly utilize, and must be purified to 10mg/m
3below can use.
Converter current high temperature coal gas purification mainly contains wet method (OG method) and dry method (LT method).OG method adopts multistage water washing method to remove dust in coal gas, is traditional purification style, has the deficiencies such as purification efficiency is low, and operation energy consumption is high, and waste heat is underused, sewage disposal.LT dry method owned by France, being the improvement to OG, is also current conventional purification style, employing be the type of cooling of Direct spraying evaporation in coal gas, the waste heat of coal gas is underused, gas purification adopts electric precipitator, and purification efficiency is unstable, can not effectively remove minuteness particle, cost of investment is higher, repair and maintenance workload is large, and when electric precipitator work, discharge generation spark, exists potential safety hazard.
The technical scheme that the patent documentation of application number 200610088073.6 and application number 200810035374.1 is recorded is all the improvement to LT method, replace with sack cleaner by the electric precipitator in LT, the deficiency existing to solve electric precipitator, but what the type of cooling of the two all adopted is high temperature evaporation cooling tower (being Direct spraying evaporative cooling in coal gas), coal gas of high temperature sensible heat is not recycled utilization, and waste heat is not fully reclaimed.
Summary of the invention
The object of the invention is the deficiency existing for prior art, provide a kind of afterheat of converter gas to reclaim and minuteness particle purification system and method, solve the problem that above-mentioned prior art exists.
Technical solution of the present invention is: a kind of RECOVERY OF CONVERTER GAS UTILIZATION OF VESIDUAL HEAT IN and minuteness particle dry purifying system are provided, comprise converter, be arranged on converter top and cover the movable gas hood of hot metal charging mouth, the gasification cooling flue being connected with movable gas hood, the waste heat boiler being connected with seamless steel tube for boiler with gasification cooling flue; Waste heat boiler connects minuteness particle cleaner, gas fan, switching station, coal gas cooling tower, gas chamber by gas line successively; Described gasification cooling flue, waste heat boiler adopt seamless steel tube for boiler to be connected with steam energy storage device; Between coal gas cooling tower, gas chamber, be connected with water seal with gas line; Switching station is connected with diffusing chimney with gas line.
Waste heat boiler of the present invention, is a kind of cooling steam-water heat exchanging equipment indirectly, can reduce gas temperature, gas recovery sensible heat.Replace in LT method and existing patent by directly cooling high temperature evaporation water cooler of spraying in coal gas.
Minuteness particle cleaner of the present invention is a kind of dry cleaning equipment, is to be specifically designed to the High-cfficiency Filtration equipment of removing minuteness particle in coal gas, has replaced the electric precipitator in LT method.Minuteness particle cleaner can be pre-charged bag filter, coagulation bag filter, Stainless Steel Fibre strainer, porcelain filter, sack cleaner etc.
Steam accumulator of the present invention, is the pressurized vessel of storing the steam of gasification cooling flue and waste heat boiler generation, and has the function of steady steam supply.In convertor steelmaking process, have the operating process such as tapping, hot metal charging, coal gas output is unstable, and the steam producing is also unstable, and steam accumulator plays buffering and regulating effect, and secure an adequate supply quantity of steam and supply gas pressure are steady.
Steam accumulator of the present invention, in steam accumulator bottom, recycle pump is set, between gasification cooling flue, waste heat boiler, steam accumulator and recycle pump, adopt seamless steel tube for boiler to be connected, recycle pump is to gasification cooling flue and waste heat boiler periodical feeding, and the steam that produces enters steam accumulator with recirculated water.
A kind of RECOVERY OF CONVERTER GAS UTILIZATION OF VESIDUAL HEAT IN and minuteness particle dry cleaning method, comprise the steps: that 1600 ℃ of high temperature dust coal gas that produce after molten iron oxygen blast in converter enter gasification cooling flue by movable gas hood, carry through gasification cooling flue, and cool to 800-1000 ℃ and enter waste heat boiler, again through waste heat boiler reducing temperature twice to 200-230 ℃ laggard enter minuteness particle cleaner, remove dust and minuteness particle in coal gas, after purifying, coal gas pressurizes by gas fan, after testing, if coal gas is qualified, directly enter coal gas cooling tower through coal gas switching station cooling for the third time, spraying cooling to 60 ℃, and after send into gas chamber through water seal for coal gas, complete coal-gas recovering, if coal gas defective (CO concentration is inadequate, or oxygen level exceeds standard), the coal gas after pressurization diffuses by coal gas switching station and diffusing chimney burning, recycle pump supplies water to gasification cooling flue and waste heat boiler, and the steam of generation is all stored in steam accumulator, through buffering rear line or the steady steam supply of steam turbine, realizes UTILIZATION OF VESIDUAL HEAT IN.
Beneficial effect of the present invention is: can fully reclaim coal gas of converter, UTILIZATION OF VESIDUAL HEAT IN, effectively remove the minuteness particle in coal gas, after purifying, dust content of gas is less than 10mg/m
3, operation energy consumption is low, and repair and maintenance is convenient, safe and reliable, does not have water pollution problems, meets energy-saving and emission-reduction requirement.
Accompanying drawing explanation
Fig. 1 is that afterheat of converter gas reclaims minuteness particle dry purifying system figure.
In figure: 1. converter, 2. movable gas hood, 3. gasification cooling flue, 4. waste heat boiler, 5. minuteness particle cleaner, 6. gas fan, 7. switching station, 8. coal gas cooling tower, 9. water seal, 10. gas chamber, 11. diffusing chimneys, 12. steam accumulators, 13. recycle pumps.
Embodiment
Below in conjunction with as schemed, the present invention is described further.
The RECOVERY OF CONVERTER GAS UTILIZATION OF VESIDUAL HEAT IN that the present invention proposes and minuteness particle purification system and method both can be used for new project, also can be used for transformation project.
A kind of RECOVERY OF CONVERTER GAS UTILIZATION OF VESIDUAL HEAT IN and minuteness particle purification system, comprise converter 1, be arranged on converter 1 top and cover the movable gas hood 2 of hot metal charging mouth, the gasification cooling flue 3 being connected with movable gas hood 2, the waste heat boiler 4 being connected with gasification cooling flue 3 use seamless steel tube for boiler; Waste heat boiler 4 connects minuteness particle cleaner 5, gas fan 6, switching station 7, coal gas cooling tower 8, gas chamber 10 by gas line successively; Described gasification cooling flue 3, waste heat boiler 4 adopt seamless steel tube for boiler to be connected with steam energy storage device 12; Between coal gas cooling tower 8, gas chamber 10, be connected with water seal 9 with gas line; Switching station 7 use gas lines are connected with diffusing chimney 11.
Steam energy storage device 12 is pressurized vessels, in steam accumulator 12 bottoms, recycle pump 13 is set, and between gasification cooling flue 3, waste heat boiler 4, steam accumulator 12 and recycle pump 13, adopts seamless steel tube for boiler to be connected.
Waste heat boiler 4 is coal gas cooling apparatuss of a kind of carbonated drink indirect heat exchange; Minuteness particle cleaner 5 is pre-charged bag filter, coagulation bag filter, Stainless Steel Fibre strainer, porcelain filter, sack cleaner.
A kind of afterheat of converter gas reclaims and minuteness particle purifying method: when converter 1 is made steel, 1600 ℃ of coal gas of high temperature enter evaporated flue 3 by movable gas hood 2, enters waste heat boiler 4 after being cooled to 800-1000 ℃, then is cooled to 200-230 ℃ 4 two times through waste heat boiler; Cooled dust-laden coal gas enters minuteness particle cleaner 5, removes dust and the minuteness particle in coal gas at this, and after purifying, the dust content of coal gas is less than 10mg/m
3; Clean coal gas after purification enters switching station 7 after gas fan 6 pressurizations, after testing, and as CO in coal gas and O
2when content is qualified, coal gas directly enters coal gas cooling tower 8 and is cooled to for the third time 60 ℃, to meet gas chamber 10 heatproof requirements, and after send into gas chamber 10 through water seal for coal gas 9 and store, complete coal-gas recovering; In the time that coal gas is defective, the coal gas after pressurization is transformed into diffusing chimney 11 burnings by switching station 7 and diffuses.
When converter steelmaking, the steam storage that gasification cooling flue 3 and waste heat boiler 4 produce, in steam accumulator 12, for user or steam turbine power generation, is realized waste heat recovery.Recycle pump 13 is to gasification cooling flue 3 and waste heat boiler 4 periodical feedings.
Gas fan 6 can adopt frequency converter timing, controls the fire door pressure of converter 1, and in the time of tapping low cruise.
Waste heat boiler 4 and minuteness particle cleaner 5 are equipped with deashing device, and when deashing, dust falls into ash bucket interim storage, finally gets rid of by ash-discharging device.
Claims (7)
1. a RECOVERY OF CONVERTER GAS UTILIZATION OF VESIDUAL HEAT IN and minuteness particle purification system, it is characterized in that: comprise converter (1), be arranged on converter (1) top and cover the movable gas hood (2) of hot metal charging mouth, the gasification cooling flue (3) being connected with movable gas hood (2), the waste heat boiler (4) being connected with seamless steel tube for boiler with gasification cooling flue (3); Waste heat boiler (4) connects minuteness particle cleaner (5), gas fan (6), switching station (7), coal gas cooling tower (8), gas chamber (10) by gas line successively; Described gasification cooling flue (3), waste heat boiler (4) adopt seamless steel tube for boiler to be connected with steam energy storage device (12).
2. reclaim and minuteness particle purification system according to a kind of afterheat of converter gas described in claims 1, it is characterized in that waste heat boiler (4) is a kind of coal gas cooling apparatus of carbonated drink indirect heat exchange.
3. reclaim and minuteness particle purification system according to a kind of afterheat of converter gas described in claims 1, it is characterized in that minuteness particle cleaner (5) is pre-charged bag filter, coagulation bag filter, Stainless Steel Fibre strainer, porcelain filter, sack cleaner.
4. according to a kind of RECOVERY OF CONVERTER GAS UTILIZATION OF VESIDUAL HEAT IN and minuteness particle purification system described in claims 1, it is characterized in that steam energy storage device (12) is pressurized vessel, in steam accumulator (12) bottom, recycle pump (13) is set, between gasification cooling flue (3), waste heat boiler (4), steam accumulator (12) and recycle pump (13), adopts seamless steel tube for boiler to be connected.
5. according to a kind of RECOVERY OF CONVERTER GAS UTILIZATION OF VESIDUAL HEAT IN and minuteness particle purification system described in claims 1, it is characterized in that being connected with water seal (9) with gas line between coal gas cooling tower (8), gas chamber (10).
6. according to a kind of RECOVERY OF CONVERTER GAS UTILIZATION OF VESIDUAL HEAT IN and minuteness particle purification system described in claims 1, it is characterized in that switching station (7) gas line is connected with diffusing chimney (11).
7. afterheat of converter gas reclaims and a minuteness particle purifying method, it is characterized in that: comprise the steps:
1600 ℃ of high temperature dust coal gas that produce after molten iron oxygen blast in converter (1) enter gasification cooling flue (3) by movable gas hood (2), carry through gasification cooling flue (3), and cool to 800-1000 ℃ and enter waste heat boiler (4), again through waste heat boiler (4) reducing temperature twice to 200-230 ℃ laggard enter minuteness particle cleaner (5), remove dust and minuteness particle in coal gas, after purifying, coal gas is by gas fan (6) pressurization, after testing, if coal gas is qualified, directly enter coal gas cooling tower (8) through coal gas switching station (7) cooling for the third time, spraying cooling to 60 ℃, and after send into gas chamber (10) through water seal for coal gas (9), complete coal-gas recovering, if coal gas defective (CO concentration is inadequate, or oxygen level exceeds standard), the coal gas after pressurization diffuses by coal gas switching station (7) and diffusing chimney (11) burning, recycle pump (13) supplies water to gasification cooling flue (3) and waste heat boiler (4), and the steam of generation is all stored in steam accumulator (12), through buffering rear line or the steady steam supply of steam turbine, realizes UTILIZATION OF VESIDUAL HEAT IN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410074781.9A CN103849705B (en) | 2014-03-04 | 2014-03-04 | RECOVERY OF CONVERTER GAS UTILIZATION OF VESIDUAL HEAT IN and minuteness particle purification system |
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|---|---|---|---|
| CN201410074781.9A CN103849705B (en) | 2014-03-04 | 2014-03-04 | RECOVERY OF CONVERTER GAS UTILIZATION OF VESIDUAL HEAT IN and minuteness particle purification system |
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| CN103849705A true CN103849705A (en) | 2014-06-11 |
| CN103849705B CN103849705B (en) | 2016-01-06 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104388627A (en) * | 2014-11-20 | 2015-03-04 | 中冶南方工程技术有限公司 | Dust removing method for coal gas of converter and system |
| CN105779684A (en) * | 2014-12-23 | 2016-07-20 | 鞍钢股份有限公司 | Converter coal gas recycling system and recycling method thereof |
| CN106591534A (en) * | 2017-02-14 | 2017-04-26 | 北京热盾节能技术有限公司 | Novel semi-dry method steelmaking converter smoke dust removal device and technology with waste heat recovery function |
| CN112877499A (en) * | 2021-02-25 | 2021-06-01 | 中冶南方工程技术有限公司 | Converter flue gas treatment system based on dry dedusting and operation method thereof |
| CN113005257A (en) * | 2021-02-25 | 2021-06-22 | 中冶南方工程技术有限公司 | Converter flue gas treatment system and operation method thereof |
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| CN101492756A (en) * | 2009-03-03 | 2009-07-29 | 袁长胜 | Full dry purification and residual heat utilization equipment and method for converter gas |
| CN101570807A (en) * | 2009-05-31 | 2009-11-04 | 中冶京诚工程技术有限公司 | Steel converter coal gas purification and waste heat recycling system |
| CN101691624A (en) * | 2009-09-21 | 2010-04-07 | 无锡市东方环境工程设计研究所有限公司 | Purifying and recovering process of absolute dry bag-type converter gas negative energy |
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2014
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101492756A (en) * | 2009-03-03 | 2009-07-29 | 袁长胜 | Full dry purification and residual heat utilization equipment and method for converter gas |
| CN101570807A (en) * | 2009-05-31 | 2009-11-04 | 中冶京诚工程技术有限公司 | Steel converter coal gas purification and waste heat recycling system |
| CN101691624A (en) * | 2009-09-21 | 2010-04-07 | 无锡市东方环境工程设计研究所有限公司 | Purifying and recovering process of absolute dry bag-type converter gas negative energy |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104388627A (en) * | 2014-11-20 | 2015-03-04 | 中冶南方工程技术有限公司 | Dust removing method for coal gas of converter and system |
| CN105779684A (en) * | 2014-12-23 | 2016-07-20 | 鞍钢股份有限公司 | Converter coal gas recycling system and recycling method thereof |
| CN105779684B (en) * | 2014-12-23 | 2018-01-05 | 鞍钢股份有限公司 | A kind of converter gas recovery system and its recovery method |
| CN106591534A (en) * | 2017-02-14 | 2017-04-26 | 北京热盾节能技术有限公司 | Novel semi-dry method steelmaking converter smoke dust removal device and technology with waste heat recovery function |
| CN106591534B (en) * | 2017-02-14 | 2018-09-07 | 马剑博 | Semidry duster and technique of the steelmaking converter flue gas with waste heat recovery |
| CN112877499A (en) * | 2021-02-25 | 2021-06-01 | 中冶南方工程技术有限公司 | Converter flue gas treatment system based on dry dedusting and operation method thereof |
| CN113005257A (en) * | 2021-02-25 | 2021-06-22 | 中冶南方工程技术有限公司 | Converter flue gas treatment system and operation method thereof |
| CN113005257B (en) * | 2021-02-25 | 2023-09-15 | 中冶南方工程技术有限公司 | Converter flue gas treatment system and operation method thereof |
| CN112877499B (en) * | 2021-02-25 | 2023-09-19 | 中冶南方工程技术有限公司 | Converter flue gas treatment system based on dry dedusting and operation method thereof |
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| CN103849705B (en) | 2016-01-06 |
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