CN204198776U - Waste gas of hot-blast stove flue is used for the device of reverse gas cleaning and Pneumatic ash conveying - Google Patents

Waste gas of hot-blast stove flue is used for the device of reverse gas cleaning and Pneumatic ash conveying Download PDF

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Publication number
CN204198776U
CN204198776U CN201420664489.8U CN201420664489U CN204198776U CN 204198776 U CN204198776 U CN 204198776U CN 201420664489 U CN201420664489 U CN 201420664489U CN 204198776 U CN204198776 U CN 204198776U
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China
Prior art keywords
gas
waste gas
hot
blast stove
pneumatic ash
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Expired - Fee Related
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CN201420664489.8U
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Chinese (zh)
Inventor
刘彤
刘驰
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Ansteel Engineering Technology Corp Ltd
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Ansteel Engineering Technology Corp 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
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y02A50/2351Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
    • 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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  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

The utility model relates to the device of a kind of waste gas of hot-blast stove flue for reverse gas cleaning and Pneumatic ash conveying, comprise the gaseous effluent cooler, induced draft fan, strainer, off-gas compressor and the waste gas storage tank that are communicated with successively by pipeline, described waste gas storage tank connects pulse backblowing gas bag by waste gas reducer unit one, connects pneumatic ash transmitting system by waste gas reducer unit two; Described gaseous effluent cooler, induced draft fan are connected circulating water pipeline in addition with off-gas compressor.Compared with prior art, the beneficial effects of the utility model are: 1) utilize waste gas of hot-blast stove flue to replace nitrogen and blast furnace purified gas, as the source of the gas of blast furnace gas dry type bag-type dust removal system reverse gas cleaning and Pneumatic ash conveying, production and running cost can be reduced, reduce potential safety hazard, reduce energy consumption and topsoil; 2) recycling of waste gas of hot-blast stove flue is achieved; 3) system configuration is simple, reasonable in design, drop into and running cost low, be suitable for applying.

Description

Waste gas of hot-blast stove flue is used for the device of reverse gas cleaning and Pneumatic ash conveying
Technical field
The utility model relates to waste gas of hot-blast stove flue and utilizes technical field, particularly relates to the device of a kind of waste gas of hot-blast stove flue for blast furnace gas dry type bag-type dust removal system reverse gas cleaning and Pneumatic ash conveying.
Background technology
At present, blast furnace gas drying bag dust removing reverse gas cleaning and Pneumatic ash conveying source of the gas generally adopt nitrogen and purified gas.Use nitrogen pulse back blow deashing and Pneumatic ash conveying, the nitrogen after defeated ash is directly discharged in air after total ash silo inner filtration, because nitrogen production cost is high, causes the wasting of resources.Use purified gas pulse backblowing deashing and Pneumatic ash conveying, need to pressurize to purified gas, purified gas after defeated ash can not directly discharge after total ash silo inner filtration, need to be discharged in low-pressure gas pipeline, total ash silo needs according to design of pressure vessels, manufacture and management, the explosion-proof site requirements of gas supply facility demand fulfillment, adds enterprise and produces and running cost; And blast furnace gas is inflammable, poisonous, if gas leak, very easily cause fire and the security incident such as poisoning.
Summary of the invention
The utility model provides one waste gas of hot-blast stove flue and substitutes nitrogen and blast furnace purified gas, as the device of the source of the gas of blast furnace gas dry type bag-type dust removal system reverse gas cleaning and Pneumatic ash conveying, achieve the recycling of waste gas of hot-blast stove flue, and production and running cost can be reduced, reduce potential safety hazard, reduce energy consumption and topsoil.
In order to achieve the above object, the utility model realizes by the following technical solutions:
Waste gas of hot-blast stove flue is used for the device of reverse gas cleaning and Pneumatic ash conveying, comprise the gaseous effluent cooler, induced draft fan, strainer, off-gas compressor and the waste gas storage tank that are communicated with successively by pipeline, described waste gas storage tank connects pulse backblowing gas bag by waste gas reducer unit one, connects pneumatic ash transmitting system by waste gas reducer unit two; Described gaseous effluent cooler, induced draft fan are connected circulating water pipeline in addition with off-gas compressor.
Described strainer is self-cleaning strainer.
Waste gas introduction pipe before described gaseous effluent cooler is provided with oxygen conten analyser.
Compared with prior art, the beneficial effects of the utility model are:
1) utilize waste gas of hot-blast stove flue to replace nitrogen and blast furnace purified gas, as the source of the gas of blast furnace gas dry type bag-type dust removal system reverse gas cleaning and Pneumatic ash conveying, production and running cost can be reduced, reduce potential safety hazard, reduce energy consumption and topsoil;
2) recycling of waste gas of hot-blast stove flue is achieved;
3) system configuration is simple, reasonable in design, drop into and running cost low, be suitable for applying.
Accompanying drawing explanation
Fig. 1 is equipment connection schematic diagram of the present utility model.
In figure: 1. exhaust gas of hot-blast stove house steward 2. gaseous effluent cooler 3. induced draft fan 4. strainer 5. off-gas compressor 6. waste gas storage tank 7. waste gas reducer unit 1 waste gas reducer unit 2 9. pulse backblowing gas bag 10. pneumatic ash transmitting system 11. oxygen conten analyser
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further:
Seeing Fig. 1, is equipment connection schematic diagram of the present utility model.The utility model waste gas of hot-blast stove flue is used for the device of reverse gas cleaning and Pneumatic ash conveying, comprise the gaseous effluent cooler 2, induced draft fan 3, strainer 4, off-gas compressor 5 and the waste gas storage tank 6 that are communicated with successively by pipeline, described waste gas storage tank 6 connects pulse backblowing gas bag 9 by waste gas reducer unit 1, connects pneumatic ash transmitting system 10 by waste gas reducer unit 28; Described gaseous effluent cooler 2, induced draft fan 3 are connected circulating water pipeline in addition with off-gas compressor 5.
Described strainer 4 is self-cleaning strainer.
Waste gas introduction pipe before described gaseous effluent cooler 2 is provided with oxygen conten analyser 11.
The technological process being used for the device of reverse gas cleaning and Pneumatic ash conveying based on waste gas of hot-blast stove flue is as follows:
Waste gas is drawn by waste gas of hot-blast stove flue house steward 1, and spent air temperture is at 110 ~ 130 DEG C, and pressure-2 ~-5kPa, cools to less than 40 DEG C through gaseous effluent cooler 2, enters waste gas induced draft fan 3 and boosts, and outlet exhaust pressure is 2 ~ 2.5kPa; Then enter strainer 4 to filter, removing macrobead dirt is gone forward side by side after the low dustiness of a step-down, and enter off-gas compressor 5 and pressurize, top hole pressure is 0.5 ~ 0.6MPa, temperature≤80 DEG C, is transported in blast furnace gas dry dusting system off gas storage tank 6 with closed conduit;
Two-way waste gas drawn by waste gas storage tank 6, and reducing pressure after 0.3 ~ 0.35MPa through reducer unit 1 in a road, send blast furnace gas cloth bag dedusting device pulse backblowing gas bag 9 for pulse backflushing bag-type deashing; Reduce pressure after 0.35 ~ 0.4MPa through reducer unit 28 in another road, send blast furnace gas cloth bag dedusting pneumatic ash transmitting system 10 as source of the gas, blast furnace dust is delivered in large ash silo, waste gas is after large ash silo dust removal by filtration, can directly be discharged in air, also can be discharged in low-blast furnace gaspipe network.
Waste gas of hot-blast stove flue parameter is as follows: main component is CO 2content 22 ~ 25%; N 2content 68 ~ 72%; O 2content 0.5 ~ 1%; H 2o content 5 ~ 8%; Dustiness is not more than 5mg/Nm 3; Temperature: 110 ~ 130 DEG C.Because waste gas of hot-blast stove flue main component is nitrogen and carbonic acid gas, and average oxygen content is less than 1%, meet blast furnace gas drying bag dust removing reverse gas cleaning and the requirement of pneumatic transporting ash gas.And very low to the utilization ratio of waste gas of hot-blast stove flue at present, and waste gas is discharged in air in a large number, and severe air pollutes.Waste gas of hot-blast stove flue is recycled by the utility model, for blast furnace gas dry type bag-type dust removal system, substitute nitrogen and blast furnace purified gas for the production of, reduce and produce and running cost, reduce potential safety hazard, and effectively reduce energy consumption.
Gaseous effluent cooler 2 described in the utility model and off-gas compressor 5 are general-purpose equipment, and gaseous effluent cooler 2, induced draft fan 3 and off-gas compressor 5 are connected water service pipe and the return water pipe of circulating water pipeline respectively, are, needed for equipment itself runs, not add repeat at this.
When using in blast furnace gas dry type bag-type dust collector as source of the gas for preventing waste gas, hidden danger is produced after mixing with coal gas, require, by oxygen level < 1% in the waste gas of drawing in waste gas of hot-blast stove flue house steward 1, when normally producing, can reach completely.If to occur in other situations such as stove that oxygen level exceeds standard phenomenon, being undertaken monitoring and reporting to the police by the oxygen conten analyser 11 that the waste gas introduction pipe before gaseous effluent cooler 2 is arranged, making oxygen level be reduced to less than 1% by supplementing the methods such as nitrogen in pipeline changing.
The saturated mechanical water of precipitation is produced after preventing high-temp waste gas cooling condensation, water port can be established on anterior waste gas pipeline road or equipment, waste gas is by reducing water content after strainer 4, the isothermal compression characteristic of recycling off-gas compressor 5 can remove the saturated mechanical water in waste gas, ensures that waste gas is separated out without saturated mechanical water under technological temperature.

Claims (3)

1. waste gas of hot-blast stove flue is used for the device of reverse gas cleaning and Pneumatic ash conveying, it is characterized in that, comprise the gaseous effluent cooler, induced draft fan, strainer, off-gas compressor and the waste gas storage tank that are communicated with successively by pipeline, described waste gas storage tank connects pulse backblowing gas bag by waste gas reducer unit one, connects pneumatic ash transmitting system by waste gas reducer unit two; Described gaseous effluent cooler, induced draft fan are connected circulating water pipeline in addition with off-gas compressor.
2. waste gas of hot-blast stove flue according to claim 1 is used for the device of reverse gas cleaning and Pneumatic ash conveying, and it is characterized in that, described strainer is self-cleaning strainer.
3. waste gas of hot-blast stove flue according to claim 1 is used for the device of reverse gas cleaning and Pneumatic ash conveying, and it is characterized in that, the waste gas introduction pipe before described gaseous effluent cooler is provided with oxygen conten analyser.
CN201420664489.8U 2014-11-08 2014-11-08 Waste gas of hot-blast stove flue is used for the device of reverse gas cleaning and Pneumatic ash conveying Expired - Fee Related CN204198776U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104372129A (en) * 2014-11-08 2015-02-25 鞍钢集团工程技术有限公司 Device and process used for back flushing, deashing and pneumatic ash conveying by utilizing waste flue gas of hot blast heater
CN108534159A (en) * 2018-04-28 2018-09-14 河南禾力能源股份有限公司 A kind of automatic pressure regulating device of Industrial Boiler deslagging air compressor machine
CN114733283A (en) * 2021-01-07 2022-07-12 江苏创泰特钢制品有限公司 Waste heat recovery device after steel strip heat treatment

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104372129A (en) * 2014-11-08 2015-02-25 鞍钢集团工程技术有限公司 Device and process used for back flushing, deashing and pneumatic ash conveying by utilizing waste flue gas of hot blast heater
CN104372129B (en) * 2014-11-08 2016-08-31 鞍钢集团工程技术有限公司 Waste gas of hot-blast stove flue is used for reverse gas cleaning and the device of Pneumatic ash conveying and technique
CN108534159A (en) * 2018-04-28 2018-09-14 河南禾力能源股份有限公司 A kind of automatic pressure regulating device of Industrial Boiler deslagging air compressor machine
CN108534159B (en) * 2018-04-28 2023-08-08 河南禾力能源有限公司 Automatic pressure regulating device of air compressor for slag discharge of industrial boiler
CN114733283A (en) * 2021-01-07 2022-07-12 江苏创泰特钢制品有限公司 Waste heat recovery device after steel strip heat treatment

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150311

Termination date: 20171108

CF01 Termination of patent right due to non-payment of annual fee