CN109990611A - A kind of electric furnace flue gas high-effective dust-removing and residual neat recovering system and method - Google Patents

A kind of electric furnace flue gas high-effective dust-removing and residual neat recovering system and method Download PDF

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Publication number
CN109990611A
CN109990611A CN201910282302.5A CN201910282302A CN109990611A CN 109990611 A CN109990611 A CN 109990611A CN 201910282302 A CN201910282302 A CN 201910282302A CN 109990611 A CN109990611 A CN 109990611A
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CN
China
Prior art keywords
flue gas
steam
tower
electric furnace
waste heat
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910282302.5A
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Chinese (zh)
Inventor
徐俊超
龙红明
孙运兰
吴玉欣
张向阳
朱宝忠
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Anhui University of Technology AHUT
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Anhui University of Technology AHUT
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Publication date
Application filed by Anhui University of Technology AHUT filed Critical Anhui University of Technology AHUT
Priority to CN201910282302.5A priority Critical patent/CN109990611A/en
Publication of CN109990611A publication Critical patent/CN109990611A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22STEAM GENERATION
    • F22BMETHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00Methods of steam generation characterised by form of heating method
    • F22B1/02Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/18Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004Systems for reclaiming waste heat
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004Systems for reclaiming waste heat
    • F27D2017/006Systems for reclaiming waste heat using a boiler
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004Systems for reclaiming waste heat
    • F27D2017/007Systems for reclaiming waste heat including regenerators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D2017/009Cyclone for separating fines from gas
    • 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 discloses a kind of electric furnace flue gas high-effective dust-removing for disclosing gas cleaning and heat recovery technology field and residual neat recovering system and methods, including heat accumulating type expansion chamber, waste heat boiler, cyclone dust collectors and steam phase transforming removing tower, the heat accumulating type expansion chamber, waste heat boiler, cyclone dust collectors pass sequentially through pipeline with steam phase transforming removing tower and connect, pass through setting waste heat boiler and steam phase transforming removing tower, it can either realize flue gas waste heat recovery, it can grow up and remove using the steam promotion PM2.5 fine grained generated again, reach efficient removal flue gas fine grained, really realize the purpose of energy-saving and emission-reduction, with extensive market applying value.

Description

A kind of electric furnace flue gas high-effective dust-removing and residual neat recovering system and method
Technical field
The present invention relates to gas cleaning and heat recovery technology field, specially a kind of electric furnace flue gas high-effective dust-removing and waste heat Recovery system and method.
Background technique
With becoming increasingly conspicuous for China's atmosphere polluting problem, especially PM2.5 fine grained is to people's lives and health care belt Huge harm is carried out, it is necessary to further decrease the discharge of particulate matter, improve discharge standard.Along with Thermal Power Generation Industry pollutant into One step cuts down the restriction for facing that marginal space is successively decreased, marginal cost is soaring, and the emphasis of prevention and control of air pollution work should be transferred to dirt It contaminates object and discharges the higher non-electrical industry of intensity.Future will step up the dedusting standard of non-electrical industry.
Electric furnace dust is one of primary pollution source in iron and steel enterprise, with discharge amount is big, flue-gas temperature is high, dust is thin and has There is the features such as hydrophily.Have at present for the common method of dust removal process of electric furnace gas: dust removal with machine, wet dedusting, filtering Dedusting and electrostatic precipitation.But these cleaners are not high for the removal efficiency of electric furnace flue gas PM2.5, so that in flue gas PM2.5 discharge is exceeded, therefore needs to design a kind of removing purification system for electric furnace flue gas PM2.5, is based on this, present invention design A kind of electric furnace flue gas high-effective dust-removing and residual neat recovering system and method, to solve the above problems.
Summary of the invention
The purpose of the present invention is to provide a kind of electric furnace flue gas high-effective dust-removing and residual neat recovering system and methods, on solving State proposed in background technique the problem of needing to design a kind of removing purification system for electric furnace flue gas PM2.5.
To achieve the above object, the invention provides the following technical scheme: a kind of electric furnace flue gas high-effective dust-removing and waste heat recycling System and method, including heat accumulating type expansion chamber, waste heat boiler, cyclone dust collectors and steam phase transforming removing tower, the heat accumulating type are heavy Drop room, waste heat boiler, cyclone dust collectors pass sequentially through pipeline with steam phase transforming removing tower and connect.
Preferably, the inlet end of the heat accumulating type expansion chamber is provided with relief valve.
Preferably, the steam output end of the waste heat boiler is provided with steam trap.
Preferably, the cinder-discharging port of the cyclone dust collectors is provided with dust catcher.
Preferably, the steam phase transforming removing tower includes a pair of of steam inlet, is respectively arranged at removing tower lower part two sides, and Mesh mist eliminator is arranged in removing tower top, and water system is rinsed in the mesh mist eliminator top setting.
Preferably, a kind of electric furnace flue gas high-effective dust-removing and exhaust heat recovering method include the following steps: to go out from the 4th hole of electric furnace Then the flue gas come leads to waste heat boiler and recycles to the heat of high-temperature flue gas, produce through the temperature adjustment of heat accumulating type expansion chamber and sedimentation Raw steam;Steam a part of generation is sent into steel mill's steam pipe network, and another part is passed through the subsequent steam phase transforming removing tower of system; After waste heat boiler, flue-gas temperature reduces flue gas, volume reduces, and flow velocity reduces, and pre- dedusting is carried out in cyclone dust collectors, removes Fine grained greater than 5 μm or more;Cyclone entrance flue gas is then fed into steam phase transforming removing tower, and what is do not removed in flue gas is thin Coring condensation growth occurs in the supersaturated vapor environment for being passed through steam formation for particle, and the dust-laden drop after growing up is through steam phase The mesh mist eliminator become inside removing tower intercepts, and is rinsed under the action of flushing water to removing bottom, is discharged through discard solution discharge port, Purified flue gas send to chimney through the outlet of steam phase transforming removing tower and is discharged simultaneously.
Compared with prior art, the beneficial effects of the present invention are: the present invention is de- by setting waste heat boiler and steam phase transforming Except tower, flue gas waste heat recovery can either be realized, and can grow up and remove using the steam promotion PM2.5 fine grained generated, reach To efficient removal flue gas fine grained, the purpose of energy-saving and emission-reduction is really realized, there is extensive market applying value.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will be described below to embodiment required Attached drawing is briefly described, it is clear that, drawings in the following description are only some embodiments of the invention, for ability For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached Figure.
Fig. 1 is schematic structural view of the invention.
In attached drawing, parts list represented by the reference numerals are as follows:
1- heat accumulating type expansion chamber, 2- waste heat boiler, 3- cyclone dust collectors, 4- steam phase transforming removing tower.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other Embodiment shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that, term " on ", "lower", "front", "rear", "left", "right", "top", The orientation or positional relationship of the instructions such as "bottom", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, merely to just In description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with Specific orientation construction and operation, therefore be not considered as limiting the invention.
Referring to Fig. 1, the present invention provides a kind of technical solution: a kind of electric furnace flue gas high-effective dust-removing and residual neat recovering system and Method, including heat accumulating type expansion chamber 1, waste heat boiler 2, cyclone dust collectors 3 and steam phase transforming removing tower 4, heat accumulating type expansion chamber 1, Waste heat boiler 2, cyclone dust collectors 3 pass sequentially through pipeline with steam phase transforming removing tower 4 and connect.
Wherein, the inlet end of heat accumulating type expansion chamber 1 is provided with relief valve, prevents from blocking and exploding, the steam of waste heat boiler 2 Output end is provided with steam trap, reduces moisture loss, and the cinder-discharging port of cyclone dust collectors 3 is provided with dust catcher, and ash is unloaded in absorption When the fugitive dust that generates, steam phase transforming removing tower 4 includes a pair of of steam inlet, is respectively arranged at removing tower lower part two sides, and remove Mesh mist eliminator is arranged in tower top, and water system is rinsed in the setting of mesh mist eliminator top, carries out pulse lavage to mesh mist eliminator.
One concrete application of the present embodiment are as follows: the flue gas come out from the 4th hole of electric furnace through 1 temperature adjustment of heat accumulating type expansion chamber and Then sedimentation is led to waste heat boiler 2 and is recycled to the heat of high-temperature flue gas, generates steam;Steam a part of generation is sent into Steel mill's steam pipe network, another part are passed through the subsequent steam phase transforming removing tower 4 of system;Flue gas is after waste heat boiler 2, flue-gas temperature It reduces, volume reduction, flow velocity reduces, and pre- dedusting is carried out in cyclone dust collectors 3, and removing is greater than 5 μm or more of fine grained;Whirlwind 3 exiting flue gas of deduster is then fed into steam phase transforming removing tower 4, and the fine grained not removed in flue gas is in the mistake for being passed through steam formation Coring condensation growth occurs in saturation vapour environment, the dust-laden drop after growing up is removed through the silk screen inside steam phase transforming removing tower 4 Day with fog intercepts, and is rinsed under the action of flushing water to removing bottom, is discharged through discard solution discharge port, while purified flue gas is through steaming Vapour phase becomes the outlet of removing tower 4 and send to chimney discharge.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means Particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one implementation of the invention In example or example.In the present specification, schematic expression of the above terms may not refer to the same embodiment or example. Moreover, particular features, structures, materials, or characteristics described can be in any one or more of the embodiments or examples to close Suitable mode combines.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment All details are described, are not limited the invention to the specific embodiments described.Obviously, according to the content of this specification, It can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to better explain the present invention Principle and practical application, so that skilled artisan be enable to better understand and utilize the present invention.The present invention is only It is limited by claims and its full scope and equivalent.

Claims (6)

1. a kind of electric furnace flue gas high-effective dust-removing and residual neat recovering system, including heat accumulating type expansion chamber (1), waste heat boiler (2), whirlwind Deduster (3) and steam phase transforming removing tower (4), it is characterised in that: the heat accumulating type expansion chamber (1), waste heat boiler (2), whirlwind Deduster (3) passes sequentially through pipeline with steam phase transforming removing tower (4) and connects.
2. a kind of electric furnace flue gas high-effective dust-removing according to claim 1 and residual neat recovering system, it is characterised in that: the storage The inlet end of hot type expansion chamber (1) is provided with relief valve.
3. a kind of electric furnace flue gas high-effective dust-removing according to claim 1 and residual neat recovering system, it is characterised in that: described remaining The steam output end of heat boiler (2) is provided with steam trap.
4. a kind of electric furnace flue gas high-effective dust-removing according to claim 1 and residual neat recovering system, it is characterised in that: the rotation The cinder-discharging port of wind deduster (3) is provided with dust catcher.
5. a kind of electric furnace flue gas high-effective dust-removing according to claim 1 and residual neat recovering system, it is characterised in that: the steaming It includes a pair of of steam inlet that vapour phase, which becomes removing tower (4), is respectively arranged at removing tower lower part two sides, and silk screen is arranged in removing tower top Water system is rinsed in demister, the mesh mist eliminator top setting.
6. a kind of electric furnace flue gas high-effective dust-removing and exhaust heat recovering method, characterized by the following steps: from the 4th hole of electric furnace Then flue gas out leads to waste heat boiler (2) and carries out to the heat of high-temperature flue gas through (1) temperature adjustment of heat accumulating type expansion chamber and sedimentation Recycling generates steam;Steam a part of generation is sent into steel mill's steam pipe network, and another part is passed through the subsequent steam phase transforming of system Removing tower (4);Flue gas is after waste heat boiler (2), and flue-gas temperature reduces, volume reduces, and flow velocity reduces, in cyclone dust collectors (3) Middle to carry out pre- dedusting, removing is greater than 5 μm or more of fine grained;It is de- that cyclone dust collectors (3) exiting flue gas is then fed into steam phase transforming Except tower (4), coring condensation growth occurs in the supersaturated vapor environment for being passed through steam formation for the fine grained not removed in flue gas, Dust-laden drop after growing up is intercepted through the internal mesh mist eliminator of steam phase transforming removing tower (4), is rinsed under the action of flushing water It to removing bottom, is discharged through discard solution discharge port, while purified flue gas send to chimney through steam phase transforming removing tower (4) outlet and arranges Out.
CN201910282302.5A 2019-04-09 2019-04-09 A kind of electric furnace flue gas high-effective dust-removing and residual neat recovering system and method Pending CN109990611A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201071741Y (en) * 2007-09-07 2008-06-11 北京佰能电气技术有限公司 Electric furnace flue gas waste heat power generation system
CN201105202Y (en) * 2007-09-14 2008-08-27 东南大学 Device for synergetic removing fine grains in flue gas wet desulfurization
CN101732970A (en) * 2010-01-20 2010-06-16 东南大学 Device and method for promoting fine particle matters to be removed in coal-burning wet flue gas desulfuration process
CN201740408U (en) * 2009-12-18 2011-02-09 南京凯盛开能环保能源有限公司 Electric boiler flue gas waste heat recovery system with settlement heat storage chamber
CN203694898U (en) * 2013-12-13 2014-07-09 武汉都市环保工程技术股份有限公司 Wet smoke discharging system applicable to wet-process smoke desulfurization
CN108916900A (en) * 2018-05-24 2018-11-30 安徽工业大学 A kind of fine grain system and method for steam phase transformation coupling low temperature electric precipitation removing

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201071741Y (en) * 2007-09-07 2008-06-11 北京佰能电气技术有限公司 Electric furnace flue gas waste heat power generation system
CN201105202Y (en) * 2007-09-14 2008-08-27 东南大学 Device for synergetic removing fine grains in flue gas wet desulfurization
CN201740408U (en) * 2009-12-18 2011-02-09 南京凯盛开能环保能源有限公司 Electric boiler flue gas waste heat recovery system with settlement heat storage chamber
CN101732970A (en) * 2010-01-20 2010-06-16 东南大学 Device and method for promoting fine particle matters to be removed in coal-burning wet flue gas desulfuration process
CN203694898U (en) * 2013-12-13 2014-07-09 武汉都市环保工程技术股份有限公司 Wet smoke discharging system applicable to wet-process smoke desulfurization
CN108916900A (en) * 2018-05-24 2018-11-30 安徽工业大学 A kind of fine grain system and method for steam phase transformation coupling low temperature electric precipitation removing

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Application publication date: 20190709