CN104962681A - Waste-heat-recovery converter dry-method dust removal process - Google Patents

Waste-heat-recovery converter dry-method dust removal process Download PDF

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Publication number
CN104962681A
CN104962681A CN201510378868.XA CN201510378868A CN104962681A CN 104962681 A CN104962681 A CN 104962681A CN 201510378868 A CN201510378868 A CN 201510378868A CN 104962681 A CN104962681 A CN 104962681A
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China
Prior art keywords
converter
heat exchanger
dust
heat
converter gas
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CN201510378868.XA
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Chinese (zh)
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汤海军
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汤海军
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Priority to CN201510378868.XA priority Critical patent/CN104962681A/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency

Abstract

The invention relates to the technical field of converter smoke dust removal and waste heat recovery. The waste-heat-recovery converter dry-method dust removal process comprises the following steps: step 1, extinguishing converter smoke by utilizing steam; step 2, recovering the heat of the extinguished converter smoke by utilizing a waste heat boiler heat exchanger and an oxygen extractor water heat exchanger; step 3, removing the dust by utilizing a gravity dust collector, and collecting smoke and dust by utilizing a water sealing water tank below the gravity dust collector; step 4, introducing the converter smoke passing through the gravity dust collector into an industrial water heat exchanger, cooling the converter smoke to 40 to 50 DEG C, then sending the cooled converter smoke to a heating heat exchanger, and heating to 3 to 5 EG C; step 5, sending the heated smoke to an air filter to remove the dust, and discharging the converter smoke after the dust removal by virtue of an exhaust pipe. The waste-heat-recovery converter dry-method dust removal process is less in investment, when the dust removal problem is solved, a great amount of waste heat can be recovered, the environment-friendly index requirement can be completely met, and the economic benefit and environmental protection effect are good.

Description

Recovery waste heat type converter dry dust collecting process
Technical field
The present invention relates to converter gas dedusting and heat recovery technology field, particularly a kind of recovery waste heat type converter dry dust collecting process.
Background technology
The coal-gas recovering of the high-temperature flue gas of more than 1500 DEG C produced for steel-making converter production process at present and flue gas ash removal, by being cooled to through gasification cooling flue after below 1000 DEG C, dedusting, cool to be taken out by vacuum fan and draw again, and the technique of recovery part coal gas of converter, there are wet dedusting and dry method dust mode.Wet method mode is the depositing dust mode adopting sprinkling fire cooling, massive laundering.Dry method mode adopts spraying steam fire extinguishing, appropriate spray cooling, without unnecessary current, the mode using electric precipitation.The problem of wet dedusting mode is that dust removing effects is poor, can not meet environmental requirement, and, effluent cycle large with water consumption utilizes that cost is high, vacuum fan power consumption is high, waste heat is utilized.The electric precipitation problem of dry method mode solves dust removing effects difference problem, but investment large, take up room large, still to consume that certain water yield, vacuum fan power consumption are high, waste heat is utilized.
Summary of the invention
The object of this invention is to provide and a kind ofly invest little, that waste heat recovery is profitable recovery waste heat type converter dry dust collecting process.
The object of the invention is to be realized by following approach:
Recovery waste heat type converter dry dust collecting process is following steps:
The first step is put out a fire to converter gas with steam;
Second step reclaims heat energy with waste heat boiler heat exchanger to the converter gas after fire extinguishing;
3rd step reclaims heat energy with deoxygenator water heat exchanger to the converter gas through waste heat boiler heat exchanger;
4th step is with gravitational precipitator to the converter gas dedusting after deoxygenator water heat exchanger, collects flue dust with the water seal pond below gravitational precipitator;
5th step is that the converter gas after gravitational precipitator is introduced into service water heat exchanger, by converter fume cooling to 40 DEG C-50 DEG C;
6th step is by the converter gas after service water heat exchanger, delivers to intensification heat exchanger, converter gas is heated up 3 DEG C-5 DEG C;
7th step is that the converter gas after intensification heat exchanger is delivered to air filter dedusting, and the converter gas after dedusting is discharged through vapor pipe.
Further: the converter gas temperature through waste heat boiler heat exchanger is less than 300 DEG C, the converter gas temperature through deoxygenator water heat exchanger is less than 150 DEG C.
Further: air filter paper filter core unit air filters.
Positively effect of the present invention: recovery waste heat type converter dry dust collecting process investment of the present invention is little, when solving dust removal problem, a large amount of waste heat can be reclaimed, environmental protection index requirement can be met completely, do not increase and take up room, water consumption seldom, only has a small amount of steam consumption, can also significantly reduce vacuum fan power consumption, have good economic benefit and environmental protection effect.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is heat exchanger schematic diagram of the present invention.
In figure: 1. converter, 2. gasification cooling flue, 3. steam-smoothering room, 4. pipe connecting, 5. waste heat boiler heat exchanger, 6. pipe connecting, 7. deoxygenator water heat exchanger, 8. gravitational precipitator, 9. water seal pond, 10. service water heat exchanger, 11. intensification heat exchangers, 12. air filters, 13. vapor pipes.
Embodiment
Below in conjunction with Figure of description, the present invention is elaborated.
Recovery waste heat type converter dry dust collecting process of the present invention is adopted following steps and is realized:
Embodiment: as shown in Figure 1, adopt recovery waste heat type converter dry dust collecting process of the present invention, less than 1500 DEG C of converter 1 generation enter steam-smoothering room 3 containing gas smoke through gasification cooling flue 2, with steam, fire extinguishing is carried out to the converter gas containing coal gas explosion-proof, steam only uses when flue gas produces and stop, consumption is less, the time is very short, slightly lowers the temperature to flue gas; Converter gas enters waste heat boiler heat exchanger 5 through pipe connecting 4 and carries out heat exchange, and reclaim converter gas heat energy, the converter gas temperature through waste heat boiler heat exchanger 5 is less than 300 DEG C; Converter gas enters deoxygenator water heat exchanger 7 again through pipe connecting 6 and carries out heat exchange, and reclaim converter gas heat energy, the converter gas temperature through deoxygenator water heat exchanger 7 is less than 150 DEG C.According to converter size and waste heat recovery volume size cases, for the converter gas that small vessel produces, not deoxygenator water heat exchanger 7 also can be considered.Converter gas enters gravitational dust collection fly-ash separator 8, and dust falls into water seal pond 9, and water seal pond 9 is positioned at below gravitational precipitator 8, plays water seal, venting of dust explosion effect, simultaneously because flue dust is drenched, does not have reentrainment of dust; Converter gas after gravitational precipitator 8 is introduced into service water heat exchanger 10, by converter fume cooling to 40 DEG C-50 DEG C, reaches the callable temperature range of coal gas in converter gas; Deliver to intensification heat exchanger 11 again, converter gas is heated up 3 DEG C-5 DEG C, to reduce the moisture relative humidity in flue gas, stop moisture to condense in air filter thereafter, prevent dust from hardening on filter paper; Converter gas after intensification heat exchanger 11 is delivered to air filter 12 and carry out overanxious high-effective dust-removing, its dust falls into tank, and air filter 12 adopts paper filter core unit air filters, there is floor space little, invest little, operation and maintenance cost is low, and dust removal by filtration is effective.Converter gas after dedusting is discharged through vapor pipe 13.In steam-smoothering room 3, explosion-proof to carrying out fire extinguishing containing the converter gas of coal gas with steam, changed its gas ingredients by steam-smoothering, had explosion-proof.Waste heat boiler heat exchanger 5 not only reduces flue-gas temperature, can also recovery waste heat, and waste heat boiler is pressure comparatively high-parameters, and its pressure, temperature parameter are consistent with the parameter of gasification cooling flue waste heat boiler.The drum of waste heat boiler, can independently be arranged, and also can share the drum of gasification cooling flue waste heat boiler.When independently arranging, then there are independently water supply, water outlet (vapour) recycle system; Share the drum of gasification cooling flue waste heat boiler, as long as then draw stove water from its outfall sewer, after waste heat boiler heat exchanger 5, return the drum of gasification cooling flue waste heat boiler.The pressure parameter of deoxygenator water heat exchanger 7 is lower, and its pressure is a little more than air, temperature 100 DEG C, consistent with the parameter of deoxygenator.Deoxygenator water heat exchanger 7 and deoxygenator form water cycle, and adopt water pump forced-flow, water pump can economize on electricity by variable frequency adjustment.Gravitational precipitator 8 dedusting, coarse particles dust is when slowing down, turning, and natural subsidence is in water, and there is venting of dust explosion function in water seal pond 9, bottom the water seal of its underpart, by dragging for slag facility, being pulled out by lime-ash in water, allowing automobile transport.Service water heat exchanger 10 is the hydronic heat exchanger of industrial normal-temperature water; as shown in Figure 2; can by converter fume cooling to 40 DEG C-50 DEG C; not recovery waste heat; only coal gas flue-gas temperature be reduced in flue gas can reclaim and be stored in gas chamber, and can use the air filter for molten of papery, carries out dedusting; particle dust, when over-heat-exchanger, is slowed down, turning can natural subsidence.Intensification heat exchanger 11, adopts 100 DEG C of deaerated water, flue-gas temperature is improved 3-5 DEG C, reduce the relative humidity of saturated humidity flue gas, be reduced to less than 95% by 100%, the air filter for molten dust stratification of papery when still not affecting gas recovery, dedusting, can not be allowed again to harden, and can the cleaning of blowback at any time.After paper air filter 12 dedusting, its dust, after blowback, falls in water seal pond 9.Feature of the present invention: one is that volume is little, two be efficiency of dust collection high, three be change easy to maintenance, solve dust removal problem, environmental protection index requirement can be met completely, invest little, do not increase and take up room, there is no the consumption of water, only have a small amount of steam consumption, can significantly reduce vacuum fan power consumption, four is recyclable waste heats.Be one both to have an economic benefit, the technique of Environmental-protecting dust-removing can be solved again.

Claims (3)

1. a recovery waste heat type converter dry dust collecting process, is characterized in that following steps:
The first step is put out a fire to converter gas with steam;
Second step reclaims heat energy with waste heat boiler heat exchanger (5) to the converter gas after fire extinguishing;
3rd step reclaims heat energy with deoxygenator water heat exchanger (7) to the converter gas through waste heat boiler heat exchanger (5);
4th step is with gravitational precipitator (8) to the converter gas dedusting after deoxygenator water heat exchanger (7), collects flue dust with the water seal pond (9) of gravitational precipitator (8) below;
5th step is that the converter gas after gravitational precipitator (8) is introduced into service water heat exchanger (10), by converter fume cooling to 40 DEG C-50 DEG C;
6th step is by the converter gas after service water heat exchanger (10), delivers to intensification heat exchanger (11), converter gas is heated up 3 DEG C-5 DEG C;
7th step is that the converter gas after intensification heat exchanger (11) is delivered to air filter (12) dedusting, and the converter gas after dedusting is discharged through vapor pipe (13).
2. recovery waste heat type converter dry dust collecting process according to claim 1, it is characterized in that the described converter gas temperature through waste heat boiler heat exchanger (5) is less than 300 DEG C, the converter gas temperature through deoxygenator water heat exchanger (7) is less than 150 DEG C.
3. recovery waste heat type converter dry dust collecting process according to claim 1, is characterized in that described air filter (12) is paper filter core unit air filters.
CN201510378868.XA 2015-06-26 2015-06-26 Waste-heat-recovery converter dry-method dust removal process Pending CN104962681A (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105463153A (en) * 2015-12-25 2016-04-06 中冶南方工程技术有限公司 Purification and recovery system and method for converter flue gas
CN107686868A (en) * 2017-07-31 2018-02-13 安徽诺鑫自动化设备有限公司 A kind of non-environmental-pollution ironmaking equipment of low energy consumption

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57149410A (en) * 1981-03-09 1982-09-16 Kawasaki Heavy Ind Ltd Waste gas treatment apparatus for converter having automatic opening regulation system for skirt
US4430116A (en) * 1979-11-22 1984-02-07 Kawasaki Jukogyo Kabushiki Kaisha Method and apparatus for heating or heating and reduction raw materials for a metallurgical furnace utilizing waste gases from the same furnace
CN101875992A (en) * 2009-12-23 2010-11-03 钢铁研究总院 Device and method for removing dust from converter smoke by dry method and recycling waste heat
CN101942538A (en) * 2010-06-24 2011-01-12 北京国华新兴节能环保科技有限公司 Process and equipment for dust collection and heat recovery by converter gas dry method
CN102094104A (en) * 2010-12-16 2011-06-15 包头市磁力节能环保设备有限公司 Process for removing dust from steelmaking converter flue gas by pure dry method and recovering heat energy synchronously, and waste heat boiler

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4430116A (en) * 1979-11-22 1984-02-07 Kawasaki Jukogyo Kabushiki Kaisha Method and apparatus for heating or heating and reduction raw materials for a metallurgical furnace utilizing waste gases from the same furnace
JPS57149410A (en) * 1981-03-09 1982-09-16 Kawasaki Heavy Ind Ltd Waste gas treatment apparatus for converter having automatic opening regulation system for skirt
CN101875992A (en) * 2009-12-23 2010-11-03 钢铁研究总院 Device and method for removing dust from converter smoke by dry method and recycling waste heat
CN101942538A (en) * 2010-06-24 2011-01-12 北京国华新兴节能环保科技有限公司 Process and equipment for dust collection and heat recovery by converter gas dry method
CN102094104A (en) * 2010-12-16 2011-06-15 包头市磁力节能环保设备有限公司 Process for removing dust from steelmaking converter flue gas by pure dry method and recovering heat energy synchronously, and waste heat boiler

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105463153A (en) * 2015-12-25 2016-04-06 中冶南方工程技术有限公司 Purification and recovery system and method for converter flue gas
CN105463153B (en) * 2015-12-25 2018-04-17 中冶南方工程技术有限公司 A kind of converter gas purification recovery system and method
CN107686868A (en) * 2017-07-31 2018-02-13 安徽诺鑫自动化设备有限公司 A kind of non-environmental-pollution ironmaking equipment of low energy consumption
CN107686868B (en) * 2017-07-31 2019-07-05 山西建邦集团铸造有限公司 A kind of ironmaking equipment

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Application publication date: 20151007