CN206204347U - A kind of coal gas of converter double tower cooling and purifying recovery system - Google Patents

A kind of coal gas of converter double tower cooling and purifying recovery system Download PDF

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Publication number
CN206204347U
CN206204347U CN201621214984.4U CN201621214984U CN206204347U CN 206204347 U CN206204347 U CN 206204347U CN 201621214984 U CN201621214984 U CN 201621214984U CN 206204347 U CN206204347 U CN 206204347U
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China
Prior art keywords
cooling tower
cooling
tower
converter
recovery system
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Expired - Fee Related
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CN201621214984.4U
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Chinese (zh)
Inventor
汪蓓
郑鹏辉
沈建涛
吕平
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Xi'an XiKuang Environmental Protection Co Ltd
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Xi'an XiKuang Environmental Protection 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
    • Y02P10/20Recycling

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

Abstract

The utility model discloses a kind of coal gas of converter double tower cooling and purifying recovery system, the system includes the steelmaking converter, one-level wet cooling tower, two-stage evaporative cooling tower, bag dust device, blower fan, the switching war that are sequentially connected, the switching station point two-way output, it is connected with diffusing chimney all the way, another road is connected through heat exchanger with gas chamber, the two-stage evaporative cooling tower, the lower end of bag dust device are connected with fine ash storehouse, and the steelmaking converter, one-level wet cooling tower lower end are connected with cinder storehouse.The utility model is connected using double flash evaporation cooling tower, carry out after two-stage cooling, dedusting again through the further refined dedusting of sack cleaner, can thoroughly solve that purified gas dustiness is exceeded and the technical problem of discharge beyond standards in short-term, purifying smoke dustiness≤10mg/Nm3 occurs in iron making stage chimney.

Description

A kind of coal gas of converter double tower cooling and purifying recovery system
Technical field
The utility model belongs to metallurgical technology field, and in particular to a kind of coal gas of converter double tower cooling and purifying recovery system.
Background technology
In pneumatic steelmaking refining converting process, the substantial amounts of high-temperature flue gas containing CO and dust are supervened, not only can be to ring Serious pollution is caused in border, and can cause substantial amounts of energy waste, it is therefore necessary to it is purified and is reclaimed.
Current China overwhelming majority converter dust-removing uses " OG " wet method and the dry-dedusting system represented with " LT ".
Traditional " OG " wet dedusting technology, is using unburned method twin-stage Venturi tube dust collecting process, by cooling water to cigarette The washing of gas reaches the purpose of dedusting, there is its limitation:System automation controlled level is low, and coal-gas recovering amount is relatively low, after purification Dust content of gas still reach 100mg/Nm3, after going out gas chamber, wet electrical dust precipitator dedusting again need to be carried out.Due to by water-bath, larynx The process structures such as pipe portion position are set, and system resistance damages big, and energy consumption is larger.There are large amount of sewage, sludge to produce simultaneously, corresponding rule need to be equipped with The sewage disposal system of mould.
Have that SR is small, stable, efficiency of dust collection is high, energy consumption is small with the dry-dedusting system that " LT " is representative, Coal-gas recovering rate advantage high.But still there is distinct disadvantage:Electrostatic precipitator end electric field in dry cleaning recovery system is clear The reentrainment of dust that ash is produced is taken away by purified gas again, causes purified gas dustiness exceeded.In the pneumatic steelmaking iron making stage, due to The quenched dust removing effects of devaporizer are poor, make to enter electrostatic precipitator dust concentration is high, ratio resistance big, so as to cause electrostatic to remove Dirt device efficiency of dust collection declines, and ultimately results in chimney and discharge beyond standards phenomenon in short-term occurs.At the same time, dry-dedusting system control system It is also the major obstacle for hindering it to promote that system is complicated, cost is high.
Utility model content
In view of this, main purpose of the present utility model is to provide a kind of coal gas of converter double tower cooling and purifying to reclaim system System.
To reach above-mentioned purpose, what the technical solution of the utility model was realized in:
The utility model embodiment provides a kind of coal gas of converter double tower cooling and purifying recovery system, and the system includes connecting successively Steelmaking converter, one-level wet cooling tower, two-stage evaporative cooling tower, bag dust device, blower fan, the switching war, the switching station point for connecing Two-way is exported, and is connected with diffusing chimney all the way, and another road is connected through heat exchanger with gas chamber, the two-stage evaporative cooling tower, cloth The lower end of bag dirt device is connected with fine ash storehouse, and the steelmaking converter, one-level wet cooling tower lower end are connected with cinder storehouse.
In such scheme, connected by gasification cooling flue between the steelmaking converter, one-level wet cooling tower.
In such scheme, the one-level wet cooling tower, the bottom of two-stage evaporative cooling tower are provided with for defeated ash dress Put.
In such scheme, the fine ash storehouse, cinder are provided with conveying device in storehouse.
Compared with prior art, the beneficial effects of the utility model:
The utility model is connected using double flash evaporation cooling tower, is entered through sack cleaner again after carrying out two-stage cooling, dedusting One step refined dedusting, can thoroughly solve the exceeded technology for discharge beyond standards in short-term occur with iron making stage chimney of purified gas dustiness and ask Topic, purifying smoke dustiness≤10mg/Nm3
The utility model carries out dedusting to flue gas using double flash evaporation cooling tower, two grades of rough dedusting gross efficiencys up to .80% with On, effectively reduce follow-up sack cleaner processing pressure.And one-level rough dedusting gained cinder can directly be returned through conveying device and turned Stove is utilized, and effectively reduces the airborne dust that cinder transhipment is produced.
The utility model is lowered the temperature using double flash evaporation cooling tower to flue gas, and the temperature-fall period is dived using the vaporization of water Heat realizes that water consumption is few, and is produced without sewage and sludge, without being equipped with water treatment system.
The utility model using double flash evaporation cooling tower series connection rough dedusting after again through sack cleaner refined dedusting gained clean coal Gas is that may be recovered or diffuse, and system control is simple, and equipment manufacturing cost is cheap, and overall cost of ownership is low.
Brief description of the drawings
A kind of Fig. 1 structural representations of coal gas of converter double tower cooling and purifying recovery system for the utility model embodiment is provided Figure.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and implementation Example, is further elaborated to the utility model.It should be appreciated that specific embodiment described herein is only used to explain The utility model, is not used to limit the utility model.
The utility model embodiment provides a kind of coal gas of converter double tower cooling and purifying recovery system, as shown in figure 1, the system Including the steelmaking converter 1, one-level wet cooling tower 3, two-stage evaporative cooling tower 4, bag dust device 5, blower fan 6, the switching that are sequentially connected War 7,7 points of two-way outputs of the switching station, is connected with diffusing chimney 8 all the way, and another road is connected through heat exchanger 9 with gas chamber 10, The two-stage evaporative cooling tower 4, the lower end of bag dust device 5 are connected with fine ash storehouse 11, and the evaporation of the steelmaking converter 1, one-level is cold But the lower end of tower 3 is connected with cinder storehouse 12.
Connected by gasification cooling flue 2 between the steelmaking converter 1, one-level wet cooling tower 3.
The high-temperature dust-containing flue gas produced during the oxygen furnace steel of the steelmaking converter 1(1400~1600℃), it is cold by vaporizing But flue 2, and heat exchange is carried out with the cooling water in gasification cooling flue 2, flue-gas temperature is down to 800 ~ 1000 DEG C.
High-temperature dust-containing flue gas after the cooling of the gasification cooling flue 2(About 800 ~ 1000 DEG C of temperature, dustiness 80~ 150g/Nm3), one-level rough dedusting and cooling are carried out into one-level wet cooling tower 3;Flue gas is by big after one-level wet cooling tower 3 The meal dirt that there are about 60% is deposited to bottom, and gained cinder is transported to cinder storehouse 12 by ash conveying device, in the cinder storehouse 12 Cinder returns to steelmaking converter 1 and recycles by conveying device.
Flue gas by one-level rough dedusting and cooling enters two-stage evaporative cooling tower 4, and more than 40% grit is deposited in flue gas Bottom, gained fine ash is transported to the recycling of fine ash storehouse 11 by ash conveying device.
Flue gas after being purified through two-stage evaporative cooling tower 4(180 DEG C of temperature <)Removed into the further essence of sack cleaner 5 Dirt, the outlet dustiness≤10mg/Nm of the sack cleaner 53, through the flue gas of the udst separation of the sack cleaner 5, by wind Machine 6 introduces switching station 7, and when the flue gas after purification meets recovering condition, flue gas delivers to heat exchanger by the valve of switching switching station 7 9 further coolings(70 DEG C of temperature <), it is then sent through gas chamber 10 and stores;When the flue gas after purification does not meet recovering condition, cigarette Gas is by the valve transfer of switching switching station 7 to diffusing chimney 8, ignition bleeding.
It is the system core that the series connection of double flash evaporation cooling tower is carried out into dedusting, cooling, and it instead of existing " LT " dry method skill The partial action of electrostatic precipitator in art, by two-stage rough dedusting, removes more than 80% dust, while flue-gas temperature is down to Less than 180 DEG C, then by the further refined dedusting of sack cleaner, sack cleaner is exported purified gas dustiness≤10mg/ Nm3.Compared with " LT " dry method, the utility model control is simple, and equipment manufacturing cost is relatively low, can be reached again while cost of investment is reduced To preferable gas purification recovering effect, and meet environmental requirement.The utility model reduces flue gas using the latent heat of vaporization of water Temperature, more traditional " OG " wet method, water consumption greatly reduces, and is produced without sewage, sludge, without being equipped with water treatment system.No matter It is that " " OG " wet method compares, or compares with " LT " dry method, and the utility model all has a clear superiority, with wide with tradition Popularizing application prospect.
The above, preferred embodiment only of the present utility model is not intended to limit protection of the present utility model Scope.

Claims (4)

1. a kind of coal gas of converter double tower cooling and purifying recovery system, it is characterised in that the system includes that the steel-making being sequentially connected turns Stove, one-level wet cooling tower, two-stage evaporative cooling tower, bag dust device, blower fan, switching war, the switching station point two-way output, one Road is connected with diffusing chimney, and another road is connected through heat exchanger with gas chamber, the two-stage evaporative cooling tower, the lower end of bag dust device It is connected with fine ash storehouse, the steelmaking converter, one-level wet cooling tower lower end are connected with cinder storehouse.
2. coal gas of converter double tower cooling and purifying recovery system according to claim 1, it is characterised in that:The steel-making turns Connected by gasification cooling flue between stove, one-level wet cooling tower.
3. coal gas of converter double tower cooling and purifying recovery system according to claim 1 and 2, it is characterised in that:The one-level Wet cooling tower, the bottom of two-stage evaporative cooling tower are provided with for ash conveying device.
4. coal gas of converter double tower cooling and purifying recovery system according to claim 3, it is characterised in that:The fine ash storehouse, Cinder is provided with conveying device in storehouse.
CN201621214984.4U 2016-11-11 2016-11-11 A kind of coal gas of converter double tower cooling and purifying recovery system Expired - Fee Related CN206204347U (en)

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CN201621214984.4U CN206204347U (en) 2016-11-11 2016-11-11 A kind of coal gas of converter double tower cooling and purifying recovery system

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Application Number Priority Date Filing Date Title
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107739771A (en) * 2017-11-30 2018-02-27 北京瑞达宏信科技有限公司 Coal gas of converter heat energy full-dry method purifying recovery method and its device
CN110241284A (en) * 2019-07-24 2019-09-17 马鞍山钢铁股份有限公司 A kind of flue gas particles of steelmaking converter purification system and purification method again
CN113684341A (en) * 2021-08-17 2021-11-23 中冶东方工程技术有限公司 System and method for purifying primary flue gas of converter
CN115491460A (en) * 2022-10-17 2022-12-20 江苏中碳节能技术有限公司 Converter flue gas treatment system and treatment method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107739771A (en) * 2017-11-30 2018-02-27 北京瑞达宏信科技有限公司 Coal gas of converter heat energy full-dry method purifying recovery method and its device
CN110241284A (en) * 2019-07-24 2019-09-17 马鞍山钢铁股份有限公司 A kind of flue gas particles of steelmaking converter purification system and purification method again
CN113684341A (en) * 2021-08-17 2021-11-23 中冶东方工程技术有限公司 System and method for purifying primary flue gas of converter
CN115491460A (en) * 2022-10-17 2022-12-20 江苏中碳节能技术有限公司 Converter flue gas treatment system and treatment method
CN115491460B (en) * 2022-10-17 2024-06-07 江苏华和能科技术有限公司 Converter flue gas treatment system and treatment method

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Granted publication date: 20170531