CN109282661A - A kind of method of thermal-state blast furnace slag processing house refuse - Google Patents

A kind of method of thermal-state blast furnace slag processing house refuse Download PDF

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Publication number
CN109282661A
CN109282661A CN201811023832.XA CN201811023832A CN109282661A CN 109282661 A CN109282661 A CN 109282661A CN 201811023832 A CN201811023832 A CN 201811023832A CN 109282661 A CN109282661 A CN 109282661A
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China
Prior art keywords
blast furnace
furnace slag
thermal
rubbish
state blast
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CN201811023832.XA
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Chinese (zh)
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CN109282661B (en
Inventor
王向锋
马光宇
刘常鹏
李卫东
孙守斌
王东山
张天赋
王永
钱峰
赵俣
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Angang Steel Co Ltd
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Angang Steel Co Ltd
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Classifications

    • 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
    • F27D3/00Charging; Discharging; Manipulation of charge
    • F27D3/15Tapping equipment; Equipment for removing or retaining slag
    • 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

A kind of method that the present invention discloses thermal-state blast furnace slag processing house refuse.Thermal-state blast furnace slag can light rubbish directly as high temperature heat source, and mix burning with rubbish completion, and the high-temperature flue gas of formation is recycled through electricity generation system, improves waste incineration and generating electricity amount, realizes the waste heat recycling of blast furnace slag indirectly.Blast furnace slag and rubbish mix the clinker formed after burning and blast furnace slag composition is close, do not influence the comprehensive utilization of after-flame clinker.

Description

A kind of method of thermal-state blast furnace slag processing house refuse
Technical field
The present invention relates to blast furnace slag waste heat recovery technology field, it is particularly suitable in grate furnace using at thermal-state blast furnace slag The method for managing house refuse.
Background technique
Blast furnace slag is the by-product of blast furnace process.Its main component is calcium oxide, magnesia, aluminum oxide, titanium dioxide Silicon etc. can replace natural rock production cement or slag differential etc. to be used for building material product.The tapping temperature of blast furnace slag is greater than 1500 DEG C, the heat contained by 1 ton of blast furnace slag is equivalent to 64kg standard coal, and existing processing method uses water quenching technology, in addition to few portion Northern Enterprises are divided to carry out outside heating in winter using the waste heat of washing slag water, substantially without other effective waste heat recovery modes.Cause This, not only the sensible heat of blast furnace slag and latent heat can not recycle, and cause great energy waste.And INBA method flush slag technique The a large amount of wastes for also causing water resource also result in serious pollution to big gas and water and soil.Through investigating, exploitation is high both at home and abroad The research of clinker dry type heat recovery technology is more, but does not have the report of industrial applications always.
As China human mortality increases sharply and improvement of living standard, house refuse, which has become, influences China's environment Major issue.Waste incineration because efficient quick, volume reduction is significant, energy utilization rate is high the advantages that, become the normal of domestic rubbish disposal With one of mode.And incineration treatment of garbage is the most common waste disposal method of current foreign applications, the great advantage of the method It is that garbage as resource and minimizing degree for the treatment of are high, it has also become the main path and power industry of developed country's processing house refuse Important component.In western developed country, the application of garbage incineration technology has had nearly 130 years history, and mesh Before be still considered as most effective, economic one of technology of garbage disposal.
Garbage incineration process mainly includes fire grate oven process, ciculation fluidized bed process, pyrolysismethod, evaporating method etc., wherein grate furnace The application percentage highest of method.
Summary of the invention
The purpose of the present invention is to provide a kind of methods of thermal-state blast furnace slag processing house refuse, and heat is utilized in grate furnace The house refuse of state blast furnace Slag treatment with thermal-state blast furnace slag waste-heat and promotes incineration firing, reduces the waste incineration energy certainly Body consumption, improves waste incineration and generating electricity amount.
In order to achieve the above object, the present invention is implemented with the following technical solutions:
A kind of method of thermal-state blast furnace slag processing house refuse, comprising the following steps:
1) rubbish pre-processes, and carries out dehydration fermentation.
2) raw material enters furnace: rubbish after fermentation and thermal-state blast furnace slag are added to grate furnace by 2 independent feed inlets On fire grate.Rubbish enters furnace prior to thermal-state blast furnace slag after fermentation.Blast furnace slag is by cinder ladle discharge port continuous charging.
3) incineration firing.Thermal-state blast furnace slag ignites rubbish under combustion air effect, and mixes and mix burning.
4) fume treatment.The recovered pipeline of the high-temperature flue gas generated after burning enters fume recovery system, particulate matter shape At flying dust, hot wind enters electricity generation system power generation, then the outlet after desulfurization dust-removing technique is up to standard.
5) clinker outlet.After-flame clinker passes through the exclusive row of lower furnace.
It is moved from top to bottom into the rubbish in grate furnace by gravity, and combustion air blasts furnace by air blower from bottom to top It is interior, top-down drying layer, oxidizing fire layer, slag blanket are sequentially formed in furnace, pass through dry, the volatilization gas to garbage dewatering The gradually interim reaction of combustion by evaporation and fixed carbon burning.
The fume treatment is generated after waste incineration using smoke settlement-waste heat recycling-fume desulfurizing and dedusting technology High-temperature flue gas initially enter expansion chamber and carry out continuity burning, then preliminary cooling and recovery waste heat, then use semidry method depickling With bag-type dust combine smoke processing system, remove flue gas in solid particle, oxysulfide, nitrogen oxides, hydrogen chloride, two The harmful substances such as English are disliked to reduce environmental pollution to reach the standard limit of smog release of national regulation.
The thermal-state blast furnace slag additional amount is the 15%-50% of rubbish, it can be achieved that rubbish ignites and stablizes burning, preferably Additional amount is 20%-30%.
The blast furnace slag temperature is 1300-1500 DEG C, and preferable temperature is 1350-1400 DEG C.Blast furnace slag temperature is higher, lights Burning effect is better with mixing, but transports heat preservation pressure and increase, and cost is excessively high;Blast furnace slag temperature is too low, and ignition ability is poor, or even can The theoretical temperature combustion of rubbish can be reduced, and after blast furnace slag viscosity increases, flow control and mixing mix burn effect it is obvious under Drop.
Compared with prior art, the beneficial effects of the present invention are:
1) thermal-state blast furnace slag can light rubbish directly as high temperature heat source, and mix burning, the high temperature cigarette of formation with rubbish completion Gas is recycled through electricity generation system, improves waste incineration and generating electricity amount, realizes the waste heat recycling of blast furnace slag indirectly.
2) blast furnace slag and rubbish mix the clinker formed after burning and blast furnace slag composition is close, do not influence the comprehensive benefit of after-flame clinker With.
The present invention has obvious economic and environmental benefits, and in industry has very big popularization practical value.
Specific embodiment
It is illustrated combined with specific embodiments below:
Specific embodiments of the present invention will be further explained below:
Embodiment 1
A kind of method of thermal-state blast furnace slag processing house refuse, comprising the following steps:
1) rubbish pre-processes, and carries out dehydration fermentation.
2) rubbish, thermal-state blast furnace slag enter furnace respectively.Rubbish and thermal-state blast furnace slag pass through 2 independent feed inlets after fermenting It is spread on fire grate.Wherein thermal-state blast furnace slag feeding inlet is located at rubbish feeding inlet upper back region.Feeding blast furnace slag temperature is 1400 DEG C, additional amount is the 25% of rubbish.Blast furnace slag is by cinder ladle lower part discharge port continuous charging.
3) incineration firing.Thermal-state blast furnace slag ignites rubbish under combustion air effect, and mixes and mix burning.
4) fume treatment.The recovered pipeline of the high-temperature flue gas generated after burning enters fume recovery system, particulate matter shape At flying dust, hot wind enters electricity generation system power generation, then the outlet after desulfurization dust-removing technique is up to standard.
5) clinker outlet.After-flame clinker passes through the exclusive row of lower furnace.
It is moved from top to bottom into the rubbish in grate furnace by gravity, and combustion air blasts furnace by air blower from bottom to top It is interior, top-down drying layer, oxidizing fire layer, slag blanket are sequentially formed in furnace, pass through dry, the volatilization gas to garbage dewatering The gradually interim reaction of combustion by evaporation and fixed carbon burning.
The fume treatment is generated after waste incineration using smoke settlement-waste heat recycling-fume desulfurizing and dedusting technology High-temperature flue gas initially enter expansion chamber and carry out continuity burning, then preliminary cooling and recovery waste heat, then use semidry method depickling With bag-type dust combine smoke processing system, remove flue gas in solid particle, oxysulfide, nitrogen oxides, hydrogen chloride, two The harmful substances such as English are disliked to reduce environmental pollution to reach the standard limit of smog release of national regulation.

Claims (4)

1. a kind of method of thermal-state blast furnace slag processing house refuse, it is characterised in that the following steps are included:
1) rubbish pre-processes: carrying out dehydration fermentation;
2) raw material enters furnace: rubbish after fermentation and thermal-state blast furnace slag are added to the fire grate of grate furnace by 2 independent feed inlets On;Rubbish enters grate furnace prior to thermal-state blast furnace slag after wherein fermenting;The 15%- that quality is rubbish is added in the thermal-state blast furnace slag 50%, the blast furnace slag temperature is 1300-1500 DEG C;
3) incineration firing: thermal-state blast furnace slag ignites rubbish under combustion air effect, and mixes and mix burning;Into in grate furnace Rubbish moves from top to bottom by gravity, and combustion air is blasted in grate furnace by air blower from bottom to top;
4) fume treatment: the recovered pipeline of the high-temperature flue gas generated after burning enters fume recovery system, and particulate matter forms winged Ash, hot wind enter electricity generation system power generation, then the outlet after desulfurization dust-removing technique is up to standard;
5) clinker outlet: after-flame clinker passes through the exclusive row of lower furnace.
2. the method for thermal-state blast furnace slag processing house refuse according to claim 1, it is characterised in that: the fume treatment is to adopt With smoke settlement-waste heat recycling-fume desulfurizing and dedusting technology, the high-temperature flue gas generated after waste incineration initially enter expansion chamber into Row continues burning, then preliminary cooling and recovery waste heat, then the fume treatment system combined using semidry method depickling and bag-type dust System.
3. the method for thermal-state blast furnace slag processing house refuse according to claim 1, it is characterised in that: the thermal-state blast furnace slag is added Quality is the 20%-30% of rubbish.
4. the method for thermal-state blast furnace slag processing house refuse according to claim 1, it is characterised in that: the blast furnace slag temperature is 1350-1400℃。
CN201811023832.XA 2018-09-04 2018-09-04 Method for treating household garbage by hot blast furnace slag Active CN109282661B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
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CN111043867A (en) * 2019-10-28 2020-04-21 鞍钢股份有限公司 System and method for treating household garbage by utilizing ironmaking waste heat
CN114369691A (en) * 2022-01-04 2022-04-19 中冶南方工程技术有限公司 Urban solid waste and iron making cooperative system and method based on blast furnace slag waste heat utilization

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CN111043867A (en) * 2019-10-28 2020-04-21 鞍钢股份有限公司 System and method for treating household garbage by utilizing ironmaking waste heat
CN111043867B (en) * 2019-10-28 2021-09-14 鞍钢股份有限公司 System and method for treating household garbage by utilizing ironmaking waste heat
CN114369691A (en) * 2022-01-04 2022-04-19 中冶南方工程技术有限公司 Urban solid waste and iron making cooperative system and method based on blast furnace slag waste heat utilization

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