CN202390451U - Waste heat recycling system for blast-furnace slag - Google Patents

Waste heat recycling system for blast-furnace slag Download PDF

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Publication number
CN202390451U
CN202390451U CN201120462675XU CN201120462675U CN202390451U CN 202390451 U CN202390451 U CN 202390451U CN 201120462675X U CN201120462675X U CN 201120462675XU CN 201120462675 U CN201120462675 U CN 201120462675U CN 202390451 U CN202390451 U CN 202390451U
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China
Prior art keywords
slag
flushing cinder
water
blast
liquid
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Withdrawn - After Issue
Application number
CN201120462675XU
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Chinese (zh)
Inventor
高贤成
李丙来
高新运
王连杰
赵晓明
李传辉
陈霞
周波
杨士岭
梁丽萍
肖海龙
邹金城
张熙伟
孟令军
马庆涛
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Jinan Iron and Steel Co Ltd
Jinan Iron and Steel Group Co Ltd
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Jinan Iron and Steel Co Ltd
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Priority to CN201120462675XU priority Critical patent/CN202390451U/en
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Publication of CN202390451U publication Critical patent/CN202390451U/en
Anticipated expiration legal-status Critical
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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
    • 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
    • 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
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies

Abstract

Disclosed is a waste heat recycling system for blast-furnace slag. The waste heat recycling system for the blast-furnace slag comprises a liquid slag transportation tank, a liquid slag standing tank, a sealed slag washing tank, a slag washing water nozzle, a spiral slagging device, a granulated slag dehydration device, a granulated slag traveling belt, a slag washing water sedimentation tank, a slag washing steam discharging pipeline, a recuperative heat exchanger, a slag-washing-out pump, an evaporation boiler, a generator, a steam condenser, a generating water-circulation pump and a compressed air pressure supplementing device. The waste heat recycling system for the blast-furnace slag has the advantages that the existing water quenching technique of the blast-furnace slag and high activity of granulated slag products can be maintained, smooth operation of an applying channel industry chain of the granulated slag is guaranteed, and slag washing with a small water volume and recycling of steam waste heat can be achieved.

Description

A kind of blast-furnace slag heat recovery system
Technical field
The utility model relates to the blast-furnace slag heat recovery, is a kind ofly can keep water quenching technology, keeps the heat recovery system that slag performance and purposes do not change after the shrend.
Background technology
The blast furnace ironmaking process produces a large amount of liquid slags, contains huge heat in the slag, and therefore, the blast-furnace slag heat recovery has very big economic worth.Because the blast-furnace slag water quenching technology is very ripe; " grain slag " of its generation has very high " activity "; Be not only cement well " grog "; And become building material industry after the process fine grinding--indispensable in the-concrete " additive ", utilize " grain slag " preparation cement to become very proven technique of building material industry.Once the someone carried out the research that wind is quenched methods recovery blast-furnace slag waste heats such as method and steel ball heat exchanging, but this method is destroyed original industrial chain all because of " activity " that change the slag the finished product, and can't promotion and implementation.At maintenance blast-furnace slag water quenching technology, keep " grain slag " product higher " activity ", guarantee that under " grain slag " industrial chain normal operation prerequisite, the method that reclaims using exhaust heat of slag flushing water is existing, but mostly only be used for warming oneself and having a bath that its steam of flushing cinder is not applied.
The utility model content
To the deficiency of prior art, the utility model provides a kind of blast-furnace slag heat recovery system, promptly can keep the blast-furnace slag water quenching technology; Keep " grain slag " product to have higher " activity "; Guarantee that " grain slag " industrial chain runs well, can recycle steam waste heat through the low wash water flushing cinder again, utilize the further heating evaporation of Iron And Steel Plant's residue blast furnace gas again; Be used to the comprehensive recovery waste heat method of generating electricity then, realize iron and steel enterprise's energy-saving and emission-reduction.
The utility model solves the technical scheme that its technical problem adopted: a kind of blast-furnace slag heat recovery system; It is characterized in that; Comprise liquid slag transfer cask, liquid slag standing tank, sealing flushing cinder jar, flushing cinder water spouting nozzle, spiral slag discharging device, grain slag dewatering unit, grain slag travelling belt, flushing cinder water precipitation pond, steam of flushing cinder discharge line, recuperative heat exchanger, slag-washing-out pump, evaporation boiler, generator, steam condenser, electrical generation water water circulating pump and pressurized air ftercompction device; Wherein, Said liquid slag standing tank is installed in sealing flushing cinder jar upside, and is communicated with sealing flushing cinder jar bottom the said liquid slag standing tank, and said flushing cinder water spouting nozzle is installed on the sealing flushing cinder jar; Said spiral slag discharging device is installed in sealing flushing cinder jar bottom, and connects with sealing flushing cinder jar; Said grain slag dewatering unit is at spiral slag discharging device downside, and said grain slag travelling belt is in grain slag dewatering unit exit, and said flushing cinder water precipitation pond is below the grain slag dewatering unit; Steam of flushing cinder discharge line in sealing flushing cinder tank top is connected to recuperative heat exchanger top, and the condensation-water drain of said recuperative heat exchanger bottom is connected to flushing cinder water precipitation pond; Said flushing cinder water precipitation pond is connected with slag-washing-out pump, and said slag-washing-out pump is connected with the flushing cinder water spouting nozzle; The pipe connection that is heated of said recuperative heat exchanger arrives power generation system; Said power generation system comprises evaporation boiler, generator, steam condenser, the electrical generation water water circulating pump that is connected in series successively, and said electrical generation water water circulating pump is supplied cold water to recuperative heat exchanger;
On the said liquid slag standing tank cover is arranged, and said liquid slag standing tank connects a pressurized air ftercompction device;
Said liquid slag transfer cask replenishes material to the liquid slag standing tank.
Said liquid slag transfer cask and liquid slag standing tank internal surface all have the refractory lining layer.
Said liquid slag transfer cask can ship by rail to fail and also can be transported by automobile.
Described steam condenser is a kind of in cold of interchanger or water cooling tower.
Said liquid slag standing tank is set to two arranged side by side.
The beneficial effect of the utility model is: the one, can keep existing blast-furnace slag water quenching technology, and keep " grain slag " product to have higher " activity ", guarantee that " grain slag " application channels industrial chain runs well.The 2nd, can realize the low wash water flushing cinder, recycle the steam waste heat that flushing cinder produces, and sealing flushing cinder jar is totally enclosed; No steam leakage water saving and heat, and heat generating and use recirculated water, and then utilize the remaining blast furnace gas of Iron And Steel Plant; Power generation cycle water to flushing cinder vapor recovery waste heat carries out further heating evaporation, makes it to be able to make the purpose of generator operation generating; Water consumption is little, realizes iron and steel enterprise's energy-saving and emission-reduction according to this, improves the business economic benefit.
Description of drawings
Fig. 1 is the layout n. of the utility model;
Among the figure: 1 liquid slag transfer cask, 2 liquid slag standing tanks, 3 sealing flushing cinder jars, 4 flushing cinder water spouting nozzles, 5 spiral slag discharging devices, 6 grain slag dewatering units, 7 grain slag travelling belts, 8 flushing cinder water precipitation ponds, 9 steam of flushing cinder discharge lines, 10 recuperative heat exchangers, 11 slag-washing-out pumps, 12 evaporation boilers, 13 generators, 14 steam condensers, 15 electrical generation water water circulating pumps.
Embodiment
Like Fig. 1; A kind of blast-furnace slag heat recovery system comprises liquid slag transfer cask 1, liquid slag standing tank 2, sealing flushing cinder jar 3, flushing cinder water spouting nozzle 4, spiral slag discharging device 5, grain slag dewatering unit 6, grain slag travelling belt 7, flushing cinder water precipitation pond 8, steam of flushing cinder discharge line 9, recuperative heat exchanger 10, slag-washing-out pump 11, evaporation boiler 12, generator 13, steam condenser 14, electrical generation water water circulating pump 15 and pressurized air ftercompction device.
Sealing flushing cinder jar 3 is the tank bodies of sealing, and to the sealing flushing cinder jar 3 inner liquid slags that flow into, slag and water spray realize producing the purpose of steam through liquid slag standing tank 2, so sealing flushing cinder jar 3 is places of steam generation.On the sealing flushing cinder jar 3 liquid slag influx, the vapour-discharge tube road that connects with liquid slag standing tank 2 arranged, there is the warm sludge relief outlet lower end, on sealing flushing cinder jar, is provided with flushing cinder water spouting nozzle 4 simultaneously.
Liquid slag standing tank 2 is installed in above the sealing flushing cinder jar 3, liquid slag standing tank 2 bottoms is communicated with sealing flushing cinder jar 3 and the liquid slag influx corresponding, effect is to sealing the additional liquid slag of flushing cinder jar.Flushing cinder water spouting nozzle 4 is installed on the sealing flushing cinder tank, sprays water on the liquid slag in flowing into sealing flushing cinder jar jar, produces steam.Spiral slag discharging device 5 is installed in sealing flushing cinder jar bottom, is a screw feed mechanism, and connects with sealing flushing cinder jar, is convenient to so the cool slag of sealing flushing cinder jar 3 bottoms is transported away.Grain slag dewatering unit 6 is below spiral slag discharging device; Grain slag travelling belt 7 is in grain slag dewatering unit exit; Flushing cinder water precipitation pond goes out the moisture drop in the cool slag below the grain slag dewatering unit, and the water that drop goes out is pooled to flushing cinder water precipitation pond 8 collects and precipitate.
Steam of flushing cinder discharge line 9 at sealing flushing cinder jar 3 tops is connected to recuperative heat exchanger 10 tops, and the condensation-water drain of recuperative heat exchanger 10 bottoms is connected to flushing cinder water precipitation pond 8; Flushing cinder water precipitation pond 8 is connected with slag-washing-out pump 11, and said slag-washing-out pump 11 is connected with flushing cinder water spouting nozzle 4, so just can be so that flushing cinder water major part obtain recycling, and a spot of water replenishes and gets final product.
The pipe connection that is heated of recuperative heat exchanger 10 arrives power generation system; Power generation system comprises evaporation boiler 12, generator 13, steam condenser 14, the electrical generation water water circulating pump 15 that is connected in series successively, and electrical generation water water circulating pump 15 is to recuperative heat exchanger 10 supply cold water; Power generation system can heat exchange obtain thermal source like this, and water is preheated, and utilizes evaporation boiler to obtain the needed steam of generator simultaneously again, realizes the purpose of generating.
Liquid slag transfer cask 1 replenishes material to liquid slag standing tank 2, and liquid slag transfer cask 1 can ship by rail to fail and also can be transported by automobile, and in the liquid slag standing tank, pours liquid slag with hanging mechanism into.On the liquid slag standing tank, cover is arranged, cover cover in the water spray process, and the liquid slag standing tank connects a pressurized air ftercompction device, can in the liquid slag standing tank, pressurize in case of necessity, so that material flows in the sealing flushing cinder jar.
In order to realize the continuity of flushing cinder and generating, the liquid slag standing tank is set to two, and the flushing cinder water spouting nozzle is set to two covers, can realize a liquid slag standing tank at the dress slag, and a liquid slag standing tank is at flushing cinder.After vapor pressure raises in order to guarantee to seal flushing cinder jar flushing cinder; Slag in the liquid slag standing tank can flow out smoothly; Be provided with cover and pressurized air ftercompction device at liquid slag standing tank jar mouth, after cover is closed, can use pressurized air ftercompction in the liquid slag standing tank; Make liquid slag standing tank internal pressure greater than sealing flushing cinder jar internal pressure, guarantee carrying out smoothly of flushing cinder according to this.In this flushing cinder system liquid slag transfer cask and the liquid slag standing tank refractory lining is arranged all, liquid slag is had insulation effect; The liquid slag transfer cask can increase cover in transportation, so that the insulation of liquid slag and preserve heat of slags to greatest extent.The liquid slag transfer cask can ship by rail to fail and also can be transported by automobile, after the liquid slag transfer cask is transported to the flushing cinder place, need the liquid slag transfer cask be sling through lift, liquid slag is poured into carried out flushing cinder in the liquid slag standing tank.Steam cooling was got off after the steam condenser of this residual neat recovering system can adopt a kind of interchanger to generate electricity, and also can adopt water cooling tower directly to cool off generating back steam.Realize the sealing flushing cinder through sealing flushing cinder jar, can reduce the flushing cinder water consumption significantly, realize the low wash water flushing cinder, to greatest extent the recovered steam waste heat.As long as reclaim the blast-furnace slag waste heat through reclaiming steam of flushing cinder, and all being covered by within the utility model scope of being used to generate electricity.
Embodiment recited above describes the preferred implementation of the utility model; Be not that scope to the utility model limits; Under the prerequisite that does not break away from the utility model design spirit; This area person skilled all should expand as in the determined protection domain of the utility model claims the various distortion and the improvement of the utility model.

Claims (5)

1. blast-furnace slag heat recovery system; It is characterized in that; Comprise liquid slag transfer cask, liquid slag standing tank, sealing flushing cinder jar, flushing cinder water spouting nozzle, spiral slag discharging device, grain slag dewatering unit, grain slag travelling belt, flushing cinder water precipitation pond, steam of flushing cinder discharge line, recuperative heat exchanger, slag-washing-out pump, evaporation boiler, generator, steam condenser, electrical generation water water circulating pump and pressurized air ftercompction device; Wherein, Said liquid slag standing tank is installed in sealing flushing cinder jar upside, and said liquid slag standing tank bottom is installed on the sealing flushing cinder jar with sealing flushing cinder jar UNICOM, said flushing cinder water spouting nozzle; Said spiral slag discharging device is installed in sealing flushing cinder jar bottom, and connects with sealing flushing cinder jar; Said grain slag dewatering unit is below spiral slag discharging device, and said grain slag travelling belt is in grain slag dewatering unit exit, and said flushing cinder water precipitation pond is below the grain slag dewatering unit; Steam of flushing cinder discharge line in sealing flushing cinder tank top is connected to recuperative heat exchanger top, and the condensation-water drain of said recuperative heat exchanger bottom is connected to flushing cinder water precipitation pond; Said flushing cinder water precipitation pond is connected with slag-washing-out pump, and said slag-washing-out pump is connected with the flushing cinder water spouting nozzle; The pipe connection that is heated of said recuperative heat exchanger arrives power generation system; Said power generation system comprises evaporation boiler, generator, steam condenser, the electrical generation water water circulating pump that is connected in series successively, and said electrical generation water water circulating pump is supplied cold water to recuperative heat exchanger;
On the said liquid slag standing tank cover is arranged, and said liquid slag standing tank connects a pressurized air ftercompction device;
Said liquid slag transfer cask replenishes material to the liquid slag standing tank.
2. a kind of blast-furnace slag heat recovery according to claim 1 system is characterized in that said liquid slag transfer cask and liquid slag standing tank internal surface all have the refractory lining layer.
3. a kind of blast-furnace slag heat recovery according to claim 1 system is characterized in that, said liquid slag transfer cask can ship by rail and defeatedly also can be transported by automobile.
4. a kind of blast-furnace slag heat recovery according to claim 1 system is characterized in that, described steam condenser is a kind of in cold of interchanger or water cooling tower.
5. a kind of blast-furnace slag heat recovery according to claim 1 system is characterized in that, said liquid slag standing tank is set to two arranged side by side.
CN201120462675XU 2011-11-21 2011-11-21 Waste heat recycling system for blast-furnace slag Withdrawn - After Issue CN202390451U (en)

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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102392085A (en) * 2011-11-21 2012-03-28 济南钢铁股份有限公司 Blast furnace slag waste heat recycling system
CN106755649A (en) * 2016-11-08 2017-05-31 游涛 Controllable the turning over of one kind output beats the grey formula slag granulating of the anti-ease of heat exchange and heat-energy recovering apparatus
CN113293245A (en) * 2021-05-19 2021-08-24 中钢集团鞍山热能研究院有限公司 High-temperature slag waste heat recovery system and method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102392085A (en) * 2011-11-21 2012-03-28 济南钢铁股份有限公司 Blast furnace slag waste heat recycling system
CN106755649A (en) * 2016-11-08 2017-05-31 游涛 Controllable the turning over of one kind output beats the grey formula slag granulating of the anti-ease of heat exchange and heat-energy recovering apparatus
CN106755649B (en) * 2016-11-08 2018-09-25 游涛 A kind of controllable turn over of output beats the grey formula slag granulating of the anti-ease of heat exchange and heat-energy recovering apparatus
CN113293245A (en) * 2021-05-19 2021-08-24 中钢集团鞍山热能研究院有限公司 High-temperature slag waste heat recovery system and method

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GR01 Patent grant
AV01 Patent right actively abandoned

Granted publication date: 20120822

Effective date of abandoning: 20130403

RGAV Abandon patent right to avoid regrant