CN201390760Y - Gas flue absolute-dry type purification recovery utilization device of steel-making converter - Google Patents

Gas flue absolute-dry type purification recovery utilization device of steel-making converter Download PDF

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Publication number
CN201390760Y
CN201390760Y CN200920039428U CN200920039428U CN201390760Y CN 201390760 Y CN201390760 Y CN 201390760Y CN 200920039428 U CN200920039428 U CN 200920039428U CN 200920039428 U CN200920039428 U CN 200920039428U CN 201390760 Y CN201390760 Y CN 201390760Y
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China
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gas
flue
waste heat
heat boiler
coal gas
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Expired - Lifetime
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CN200920039428U
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Chinese (zh)
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张卫东
吴媛媛
吴亚平
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JIANGSU ZONJIN ENVIRONMENT TECHNOLOGY Co Ltd
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JIANGSU ZONJIN ENVIRONMENT TECHNOLOGY Co Ltd
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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

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  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

The utility model discloses a gas flue absolute-dry type purification recovery utilization device of a steel-making converter, comprising an evaporation cooling gas flue, a gravity dust catcher, a waste heat boiler, a bag type dust collector, a cone pump, a concentrative powder cabin, a pressure block device, an adjustable induced draught fan, a coal gas conversion station and a coal gas tank; the converter is sequentially connected with the evaporation cooling gas flue, the gravity dust catcher, the waste heat boiler, the bag type dust collector, the adjustable induced draught fan and the coal gas conversion station; the gravity dust catcher, the waste heat boiler and the bag type dust collector are respectively connected with the cone pump which is connected with the concentrative powder cabin, and the concentrative powder cabin is connected with the pressure block device; and the coal gas conversion station is respectively communicated with a chimney and the coal gas tank; the device utilizes an absolute-dry method to carry out temperature reduction, purification and ash formation and recovery, water resource is not consumed, the physical energy and the chemical energy of the flue gas and the ferrous ash are utilized to the maximum extent, the safety property is high and the recovering cost is reduced.

Description

The device that a kind of flue gas of steelmaking converters through full-dry purification is recycled
Technical field
The utility model relates to the device that purifying smoke of steel converter is recycled, and relates in particular to the device that a kind of flue gas of steelmaking converters through full-dry purification is recycled.
Background technology
The purification of domestic steel-making converter flue gas and way of recycling have wet method, do wet method and three kinds of forms of dry method.
1) wet flue gas enters first step treating plant and just meets with water, and double venturi purifies and is wet method dedusting system.
The most representative Wet technique be 1985 from introducing Japanese OG method converter gas recovery system, RECOVERY OF CONVERTER GAS reaches a ton steel 90m 3/ h, calorific value are 8364kJ/m 3(2000kcal/m 3) more than.Since in the whole purification system, all be the purpose that the employing water spray means reaches flue gas cool-down and purification, therefore, the not high (100mg/Nm of flue gas ash removal efficient 3), mend new water (0.5 ton of/ton steel), dispose of sewage and the energy consumption height of mud (ton steel power consumption 15KWh), flue gas do not obtain recycling at 900-1000 ℃ sensible heat; This technology has just been eliminated before Japanese 20 years, and still adopts wet method at the most converter dust-removings of China.
2) do wet combined techniques flue gas and enter secondary stage purified equipment and water chance.This method efficiency of dust collection is poor, energy consumption is higher.
3) dry method is the dry method flow process of representative with Germany, is called for short the LT method, and the flue gas secondary cooling of this system still adopts saturated method of cooling, still needs a large amount of recirculated water, and in this sense, the LT technology neither pure dry method.
Electric precipitator purifies coal gas and has that safety performance is not high, decontamination effect improving is unstable, and its dust content is at 100mg/Nm 3~10mg/Nm 3Between many-sided problems such as fluctuation, equipment scaling and corrosion, put more effort along with national energy-saving and emission-reduction, water saving in recent years, make the popularization of this technology make slow progress.
The utility model content
Technical problem to be solved in the utility model provides a kind of device of utilization, with physical energy and the chemical energy and the burning iron laden dust of high efficiente callback flue gas.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is as follows:
The device that a kind of flue gas of steelmaking converters through full-dry purification is recycled, this device comprise gasification cooling flue, gravitational precipitator, waste heat boiler, sack cleaner, cone pump, concentrate powder storehouse, briquetting device, adjustable induced draft fan, coal gas switching station and gas chamber; Converter and gasification cooling flue, gravitational precipitator, waste heat boiler, sack cleaner, mode induced draft fan, coal gas switching station are linked in sequence; Gravitational precipitator, waste heat boiler and sack cleaner are connected with cone pump respectively, and all cone pumps all link to each other with concentrated powder storehouse, concentrate the powder storehouse to link to each other with briquetting device again; The coal gas switching station is communicated with chimney and gas chamber respectively.
Wherein, described waste heat boiler has combustion-compensating device, and fuel intermittently is provided.
Wherein, the quantity of described sack cleaner is 3~5, and the import and export of each sack cleaner are provided with trip valve, adopts parallel way to connect.
Wherein, described cone pump contains pulverized coal feed pipe.
Wherein, tail gas filter is contained in described concentrated powder storehouse, and tail gas directly effluxes.
The technology of utilizing said apparatus that flue gas of steelmaking converters through full-dry purification is recycled, the high-temperature flue gas that converter is produced is cooled to 800~900 ℃ through gasification cooling flue, and the latent heat that gasification cooling flue absorbs flue gas can produce steam, vapor recovery; Utilize gravitational precipitator that flue gas is carried out coarse filtration again, make dustiness be reduced to 20g/Nm 3Below; Utilize waste heat boiler that flue-gas temperature is reduced to 150~200 ℃ again, waste heat boiler has absorbed the sensible heat of flue gas, and produces steam, vapor recovery, and this heat-exchanger rig need be interrupted additional combustion gas, solves the swollen shrinkage problem of equipment heat that rapid heat cycle causes in the boiler; Through the smart filtration of sack cleaner, make dustiness be reduced to 5mg/Nm then 3Below; Be delivered to the coal gas switching station through adjustable induced draft fan, qualified coal gas enters the gas chamber storage, and is underproof directly by smoke stack emission; Dried dust (mainly being ferric oxide) under gravitational precipitator, waste heat boiler and sack cleaner remove is delivered to concentrated powder storehouse through cone pump and ash conveying pipe strength (nitrogen), concentrate the powder storehouse to contain filtration unit, tail gas directly effluxes, and discharging dust content≤20ng/m 3, after dried dust concentrate to reclaim again through briquetting device with the dust briquette forming, melt down use.
Wherein, the quantity of described sack cleaner is 3~5, the employing parallel way connects, each sack cleaner is a container type, trip valve, the pressure release of configuration safety valve, coal gas displacement apparatus, fire protection, antistatic measure and emergency diffusion valve are set on the import of each unit fly-ash separator and outlet stool, any unit fly-ash separator can be isolated fast from system and carried out on-bne repair, guarantee that the fly-ash separator system moves continuously, the bag dust collector filter bag is high temperature resistant≤and 250 ℃, filter back dust content of gas≤5mg/Nm 3
The device that flue gas of steelmaking converters through full-dry purification of the present utility model is recycled, its two-stage heat-exchanger rig, gravitational precipitator, the drag losses of pulse packet fly-ash separator in system are lower, and stable, little, the may command of fluctuation.Therefore, flue gas is realized fire door minute-pressure control purpose easily in removal process, and the rate of recovery raising of coal gas, system are improved because of amount of air drawn reduces safety performance; System's power consumption is near " LD " dry method, than " OG " water law will reduce half.Apparatus of the present invention and method need consume nitrogen, are used for sack-duster pulse deashing (bleed pressure 0.4MPa, consumption 6m 3/ min), be used for Pneumatic ash conveying (bleed pressure 0.6MPa, consumption 5m 3/ min), the coal gas displacement that is used for this system (uses under maintenance and accidental state; Need a small amount of purified gas, be used for the afterburning (consumption is decided on converter capacity) of secondary heat exchange boiler; Need the water source to be used for fire-fighting; Need pressurized air to be used for gas displacement.
Beneficial effect: the device that the utility model flue gas of steelmaking converters through full-dry purification is recycled adopts absolutely dry method cooling, purification and ashes to be shaped and reclaims, and the physical energy of no water consumption resource, flue gas and chemical energy and ferruginous ashes all are utilized to greatest extent, the purified gas of high quality (dustiness is low, water capacity is little) makes its use range increase, safety performance height, cost recovery reduction.
Description of drawings
Fig. 1 is the device synoptic diagram that flue gas of steelmaking converters through full-dry purification of the present utility model is recycled.Wherein, 1 is converter, and 2 is gasification cooling flue, and 3 is gravitational precipitator, and 4 is waste heat boiler, and 5 is sack cleaner, and 6 is cone pump, and 7 for concentrating the powder storehouse, and 8 is briquetting device, and 9 is adjustable induced draft fan, and 10 is the coal gas switching station, and 11 is gas chamber, and 12 is chimney.
Embodiment:
Below in conjunction with the drawings and specific embodiments the utility model is described further.
Embodiment 1:
As shown in Figure 1, the device that a kind of flue gas of steelmaking converters through full-dry purification is recycled, comprise gasification cooling flue 2, gravitational precipitator 3, waste heat boiler 4 (have combustion-compensating device, fuel intermittently is provided), three sack cleaners 5 (import and export of each sack cleaner are provided with trip valve), cone pump 6 (containing pulverized coal feed pipe), concentrate powder storehouse 7 (containing tail gas filter), briquetting device 8, adjustable induced draft fan 9, coal gas switching station 10 and gas chamber 11; Converter 1 is linked in sequence with gasification cooling flue 2, gravitational precipitator 3, waste heat boiler 4, sack cleaner 5, adjustable induced draft fan 9, coal gas switching station 10; Three sack cleaners adopt parallel waies to be connected in the circuit, and any one unit all can isolate fast from system and not influence continuous processing; 5 gravitational precipitators 3, waste heat boiler 4 and sack cleaner 5 are connected with cone pump 6 respectively, and all cone pumps 6 all link to each other with concentrated powder storehouse 7, concentrate powder storehouse 7 to link to each other with briquetting device 8 again; Coal gas switching station 10 is communicated with chimney 12 and gas chamber 11 respectively.
The model of above-mentioned each linking device and Babcock and Wilcox:
Gasification cooling flue: QLYD-DN Jiangsu Zhongjin Environmental Protection Technology Co., Ltd.;
Gravitational precipitator: ZLC-Q Jiangsu Zhongjin Environmental Protection Technology Co., Ltd.;
Sack cleaner: ZLMQC Jiangsu Zhongjin Environmental Protection Technology Co., Ltd.;
Cone pump: CSB_DN Shanghai wheat is examined the air conveying company of fighting;
Concentrate the powder storehouse: JZFC-DN Jiangsu Zhongjin Environmental Protection Technology Co., Ltd..
Embodiment 2:
After the gasification cooling flue cooling, flue-gas temperature drops to about 900 ℃ 1200 ℃ of the fire door flue gases of 300 tons of converters of Baosteel; Boiler smoke at all coal power stations can be reduced to about 180 ℃ through steam heat-exchanging by temperature more than 1000 ℃; The blast furnace raw gas of all Steel Plant is behind the gravitational precipitator inceptive filtering, and entrance concentration is by 150g/Nm 3Reduce to 10~20g/Nm 3The blast furnace gas bag-type dusting is handled inlet concentration 10~20g/Nm 3, purified gas exit concentration 5mg/Nm after filtering 3Below.

Claims (5)

1, a kind of device of flue gas of steelmaking converters through full-dry purification recycling is characterized in that this device comprises gasification cooling flue (2), gravitational precipitator (3), waste heat boiler (4), sack cleaner (5), cone pump (6), concentrates powder storehouse (7), briquetting device (8), adjustable induced draft fan (9), coal gas switching station (10) and gas chamber (11); Converter (1) is linked in sequence with gasification cooling flue (2), gravitational precipitator (3), waste heat boiler (4), sack cleaner (5), adjustable induced draft fan (9), coal gas switching station (10); Gravitational precipitator (3), waste heat boiler (4) and sack cleaner (5) are connected with cone pump (6) respectively, and all cone pumps (6) all link to each other with concentrated powder storehouse (7), concentrate powder storehouse (7) to link to each other with briquetting device (8) again; Coal gas switching station (10) is communicated with chimney (12) and gas chamber (11) respectively.
2, the device of flue gas of steelmaking converters through full-dry purification recycling according to claim 1 is characterized in that described waste heat boiler (4) has combustion-compensating device, and fuel intermittently is provided.
3, the device of flue gas of steelmaking converters through full-dry purification recycling according to claim 1, the quantity that it is characterized in that described sack cleaner (5) is 3~5, the import and export of each sack cleaner are provided with trip valve, adopt parallel way to connect.
4, the device of flue gas of steelmaking converters through full-dry purification recycling according to claim 1 is characterized in that described cone pump (6) contains pulverized coal feed pipe.
5, the device recycled of flue gas of steelmaking converters through full-dry purification according to claim 1 is characterized in that described concentrated powder storehouse (7) contains tail gas filter, and tail gas directly effluxes.
CN200920039428U 2009-04-14 2009-04-14 Gas flue absolute-dry type purification recovery utilization device of steel-making converter Expired - Lifetime CN201390760Y (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101532069B (en) * 2009-04-14 2011-03-16 江苏中金环保科技有限公司 Device for recycling flue gas of steelmaking converters through full-dry purification and process thereof
RU2495344C2 (en) * 2011-05-16 2013-10-10 Открытое акционерное общество "Сибирский завод электротермического оборудования" (ОАО "Сибэлектротерм") Technological treatment method of steam-dust-gas flows in gas ducts of arc furnaces and device for its implementation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101532069B (en) * 2009-04-14 2011-03-16 江苏中金环保科技有限公司 Device for recycling flue gas of steelmaking converters through full-dry purification and process thereof
RU2495344C2 (en) * 2011-05-16 2013-10-10 Открытое акционерное общество "Сибирский завод электротермического оборудования" (ОАО "Сибэлектротерм") Technological treatment method of steam-dust-gas flows in gas ducts of arc furnaces and device for its implementation

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