CN205170902U - Converter coal gas dry cleaning recovery system - Google Patents

Converter coal gas dry cleaning recovery system Download PDF

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Publication number
CN205170902U
CN205170902U CN201520879131.1U CN201520879131U CN205170902U CN 205170902 U CN205170902 U CN 205170902U CN 201520879131 U CN201520879131 U CN 201520879131U CN 205170902 U CN205170902 U CN 205170902U
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China
Prior art keywords
electrostatic precipitator
converter
switching station
gas
evaporative cooler
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CN201520879131.1U
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Chinese (zh)
Inventor
沈建涛
魏屹立
郑鹏辉
汪蓓
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Xi'an Longjing Environmental Protection Technology 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
    • Y02P10/25Process efficiency

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

Abstract

The utility model discloses a converter coal gas dry cleaning recovery system, this system is including the converter, evaporative cooler, electrostatic precipitator, wet -type electrostatic precipitator, switching station, the gas chamber that connect gradually, evaporative cooler's lower extreme is connected with coarse ash bin, electrostatic precipitator's lower extreme is connected with thin grey storehouse, wet -type electrostatic precipitator is connected with water treatment unit, be provided with the fan on the pipeline between wet -type electrostatic precipitator and the switching station, the switching station is connected with diffuses the chimney. The utility model discloses can thoroughly solve the purified gas dustiness and exceed standard and convert the technical problem that the appearance of iron stage chimney exceeds standard in short -term and discharges, purify dust content and no longer than 5mgNm3, not only satisfy current environmental protection requirement, will satisfy the new standard requirement of national environmental protection in the long period in future moreover, meanwhile, system's dust collection efficiency height will reduce the wear of flue gas to follow -up equipment such as fans.

Description

A kind of converter coal gas dry-process purifying recovery system
Technical field
The utility model belongs to metallurgical technology field, is specifically related to a kind of converter coal gas dry-process purifying recovery system.
Background technology
In convertor steelmaking process, produce the high-temperature flue gas containing a large amount of dust and CO, wherein CO content is up to 80%, if carry out Recovery Purifying to it, it can not only be avoided to produce environment and pollute, can also obtain high heating value coal gas of converter.
Converter coal gas dry-process purifying recovery system has the advantage that systemic resistance is little, stable, efficiency of dust collection is high, energy consumption is little, coal-gas recovering rate is high, but still there is distinct disadvantage:
The reentrainment of dust that electrostatic precipitator end electric field deashing in dry cleaning recovery system produces is taken away by purified gas again, causes purified gas dustiness to exceed standard.
The iron stage is converted in converter steelmaking, because the modified dust removing effects of evaporative cooler is poor, make that the dust concentration entering electrostatic precipitator is high, ratio resistance is large, thus cause electrostatic precipitator efficiency of dust collection to decline, and then affect overall dust removing effects, finally cause chimney to occur discharge beyond standards phenomenon in short-term.
Coal gas of converter first through electrostatic precipitator dedusting, then purifies cooling further through gas cooler, and this process directly contacts convective heat exchange to realize with coal gas by spray water, causes purified gas water content high, and calorific value declines.
Utility model content
In view of this, main purpose of the present utility model is to provide a kind of converter coal gas dry-process purifying recovery system.
For achieving the above object, the technical solution of the utility model is achieved in that
The utility model embodiment provides a kind of converter coal gas dry-process purifying recovery system, this system comprise connect successively converter, evaporative cooler, electrostatic precipitator, wet electrical dust precipitator, switching station, gas chamber; The lower end of described evaporative cooler is connected with cinder storehouse, the lower end of described electrostatic precipitator is connected with thin ash silo, described wet electrical dust precipitator is connected with unit for treating water, and the pipeline between described wet electrical dust precipitator and switching station is provided with blower fan, and described switching station is connected with diffusing chimney.
In such scheme, connected by gasification cooling flue between described converter and evaporative cooler.
Compared with prior art, the beneficial effects of the utility model:
The utility model adopts wet electrical dust precipitator to replace gas cooler, and carried and connecting with it to electrostatic precipitator, thoroughly can solve purified gas dustiness exceed standard and convert the technical problem that discharge beyond standards in short-term appears in iron stage chimney, flue dustiness is no more than 5mg/Nm 3, not only meet current environmental requirement, and will meet the requirement of national environmental protection new standard within the following long period, meanwhile, system dust removing efficiency is high will reduce flue gas to the abrasion of the follow-up equipments such as blower fan.
Accompanying drawing explanation
Fig. 1 provides a kind of structural representation of converter coal gas dry-process purifying recovery system for the utility model embodiment.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
The utility model embodiment provides a kind of converter coal gas dry-process purifying recovery system, as shown in Figure 1, this system comprise connect successively converter 1, evaporative cooler 3, electrostatic precipitator 4, wet electrical dust precipitator 5, switching station 7, gas chamber 9; The lower end of described evaporative cooler 3 is connected with cinder storehouse 12, the lower end of described electrostatic precipitator 4 is connected with thin ash silo 11, described wet electrical dust precipitator 5 is connected with unit for treating water 10, pipeline between described wet electrical dust precipitator 5 and switching station 7 is provided with blower fan 6, and described switching station 7 is connected with diffusing chimney 8.
Connected by gasification cooling flue 2 between described converter 1 and evaporative cooler 3.
The high-temperature dust-containing flue gas (1400-1600 DEG C) produced in described converter 1 Oxygen Furnace Steel process, by gasification cooling flue 2, and carries out heat exchange with the water coolant in gasification cooling flue 2, flue-gas temperature is down to 800-1000 DEG C.
(temperature is about 800-1000 DEG C to high-temperature dust-containing flue gas after gasification cooling flue 2 is lowered the temperature, dustiness 80 ~ 150g/Nm 3), enter evaporative cooler 3 and carry out thick dedusting and cooling, while cooling, modifier treatment is carried out to flue gas; Flue gas is deposited to bottom through the meal dirt of evaporative cooler 3 nearly 40%, and gained cinder is transported to cinder storehouse 12 recycling.
Flue gas (temperature is about 200-300 DEG C) through thick dedusting and modified cooling enters electrostatic precipitator 4, and in flue gas, more than 99% grit is captured, and the dust of trapping delivers to the recycling of thin ash silo 11.
Flue gas after electrostatic precipitator 4 purifies enters wet electrical dust precipitator 5, underlying nozzle in wet electrical dust precipitator 5 sprays preliminary humidifying cooling, simultaneously, saturated or supersaturated vapor is that the nucleus of condensation undergo phase transition condensation with PM2.5, make that PM2.5 particle diameter becomes large, weight increases, particle diameter becomes large PM2.5 and become trapped on dust collector pole under the effect of electrical forces, and flue gas obtains deep purifying, and the dust contained flue gas after purification is no more than 5mg/Nm 3.Flue gas, in the process of energising field, sprays regenerative heating cooling further through upper strata nozzle, guarantees that flue-gas temperature is down to less than 70 DEG C by control flue gas flow rate and the nozzle water yield.Finally, flue gas except device exit end demister, removes the droplet of more than 99% through wet type electricity.The sewage produced in described wet electrical dust precipitator 5 dedusting cooling and demist process, reusable edible after unit for treating water 10 processes.
Through the flue gas of wet electrical dust precipitator 5 udst separation, introduce switching station 7 by blower fan 6, when the flue gas after purifying meets recovering condition, flue gas is sent into gas chamber 9 by switch valve and is stored.When the flue gas after purifying does not meet recovering condition, flue gas switches to diffusing chimney 8 by switch valve, ignition bleeding.
Described wet electrical dust precipitator 5 is nucleus equipments of the present utility model, and it instead of gas cooler of the prior art, and is connected serially to after electrostatic precipitator, and its efficiency of dust collection is higher than gas cooler.
The technical problem that the reentrainment of dust that the utility model solves the electric field deashing generation of dry method electrostatic precipitator end causes purified gas dustiness to exceed standard, and solve and convert the technical problem that discharge beyond standards in short-term appears in iron stage chimney, solve the technical problem that the water content that purified gas causes due to wash cooling is high, calorific value declines simultaneously.
The high-temperature flue gas that converter steelmaking produces is after this utility model, and dustiness is no more than 5mg/Nm 3.
The above, be only preferred embodiment of the present utility model, is not intended to limit protection domain of the present utility model.

Claims (2)

1. a converter coal gas dry-process purifying recovery system, is characterized in that, this system comprise connect successively converter (1), evaporative cooler (3), electrostatic precipitator (4), wet electrical dust precipitator (5), switching station (7), gas chamber (9); The lower end of described evaporative cooler (3) is connected with cinder storehouse (12), the lower end of described electrostatic precipitator (4) is connected with thin ash silo (11), described wet electrical dust precipitator (5) is connected with unit for treating water (10), pipeline between described wet electrical dust precipitator (5) and switching station (7) is provided with blower fan (6), described switching station (7) is connected with diffusing chimney (8).
2. converter coal gas dry-process purifying recovery system according to claim 1, is characterized in that: connected by gasification cooling flue (2) between described converter (1) and evaporative cooler (3).
CN201520879131.1U 2015-11-06 2015-11-06 Converter coal gas dry cleaning recovery system Active CN205170902U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520879131.1U CN205170902U (en) 2015-11-06 2015-11-06 Converter coal gas dry cleaning recovery system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520879131.1U CN205170902U (en) 2015-11-06 2015-11-06 Converter coal gas dry cleaning recovery system

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CN205170902U true CN205170902U (en) 2016-04-20

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112029953A (en) * 2020-09-15 2020-12-04 西安西矿环保科技有限公司 Device and method for low-temperature electric dust removal and smoke whitening of primary smoke of converter
CN112957840A (en) * 2021-01-26 2021-06-15 日照钢铁控股集团有限公司 Method for realizing ultralow discharge of 120-ton converter by LT + metal filter bag dust remover and system used for method
CN114058773A (en) * 2021-11-04 2022-02-18 江苏天洁环境工程有限公司 Efficient purifying and dedusting system and method for converter gas
CN116673126A (en) * 2023-08-03 2023-09-01 南京恒瑞环保科技有限公司 Explosion-proof dry electrostatic precipitator and filter cartridge precipitator combined dust removal system and method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112029953A (en) * 2020-09-15 2020-12-04 西安西矿环保科技有限公司 Device and method for low-temperature electric dust removal and smoke whitening of primary smoke of converter
CN112957840A (en) * 2021-01-26 2021-06-15 日照钢铁控股集团有限公司 Method for realizing ultralow discharge of 120-ton converter by LT + metal filter bag dust remover and system used for method
CN114058773A (en) * 2021-11-04 2022-02-18 江苏天洁环境工程有限公司 Efficient purifying and dedusting system and method for converter gas
CN116673126A (en) * 2023-08-03 2023-09-01 南京恒瑞环保科技有限公司 Explosion-proof dry electrostatic precipitator and filter cartridge precipitator combined dust removal system and method
CN116673126B (en) * 2023-08-03 2024-02-02 南京恒瑞环保科技有限公司 Explosion-proof dry electrostatic precipitator and filter cartridge precipitator combined dust removal system and method

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C14 Grant of patent or utility model
GR01 Patent grant
CB03 Change of inventor or designer information

Inventor after: Shen Jiantao

Inventor after: Wei Yili

Inventor after: Zheng Penghui

Inventor after: Wang Bei

Inventor after: Lv Ping

Inventor before: Shen Jiantao

Inventor before: Wei Yili

Inventor before: Zheng Penghui

Inventor before: Wang Bei

COR Change of bibliographic data
CP01 Change in the name or title of a patent holder

Address after: 710075 7th floor, block B, Huajing Plaza, No.20, Fenghui South Road, high tech Zone, Xi'an City, Shaanxi Province

Patentee after: Xi'an Longjing Environmental Protection Technology Co.,Ltd.

Address before: 710075 7th floor, block B, Huajing Plaza, No.20, Fenghui South Road, high tech Zone, Xi'an City, Shaanxi Province

Patentee before: XI'AN XIKUANG ENVIRONMENTAL PROTECTION Co.,Ltd.

CP01 Change in the name or title of a patent holder