CN102730993A - Treatment method and implementation system for refuse incineration ash - Google Patents
Treatment method and implementation system for refuse incineration ash Download PDFInfo
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- CN102730993A CN102730993A CN2012102345229A CN201210234522A CN102730993A CN 102730993 A CN102730993 A CN 102730993A CN 2012102345229 A CN2012102345229 A CN 2012102345229A CN 201210234522 A CN201210234522 A CN 201210234522A CN 102730993 A CN102730993 A CN 102730993A
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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Abstract
The invention relates to a treatment method and system for refuse incineration ash. The treatment method for the refuse incineration ash comprises the steps that: the refuse is incinerated in an refuse incinerator (1) and the generated fly ash as well as the incineration smoke enters a decomposition furnace (2) of a cement clinker sintering system and then enters a cement kiln together with cement raw meal to be sintered to the cement clinker; hot slag is discharged out of the refuse incinerator after incineration, and is cooled in a refuse slag cooling device (3) by cooling air; the cool air exchanges heat with the hot slag to form hot air, and the hot air enters the refuse incinerator for drying and incinerating the refuse; cool slag formed by air cooling of the hot slag enters a raw material batching station to be used as the raw material of the cement and to enter a cement raw material milling system to be subjected to cement raw meal milling; and the cool slag and the other raw materials are milled to obtain the powdery cement raw meal, and the powdery cement raw meal enters the cement clinker sintering system to sinter to obtain the cement clinker. According to the system for the refuse incineration ash, the refuse slag cooling device is connected with the refuse incinerator and is arranged below the refuse incinerator.
Description
Technical field
The invention belongs to the disposal of garbage technical field, relate in particular to the method and the implementation system that utilize cement firing system cooperative disposal incineration ash of household rubbish slag.
Background technology
Domestic refuse source and composition are complicated, are broadly divided into organism and inorganics, and along with the raising of urban life level, organic content is progressively increasing.China's rubbish has water ratio height, characteristics that calorific value is lower.China's scrap heap storage over the years reaches more than 60 hundred million tons at present, and occupying cultivated land reaches 500,000,000 square metres, and the municipal wastes generation was about 2.64 hundred million tons in 2010; And just with average annual 5 ~ 8% speed increase; The year two thousand fifty will reach 5.28 hundred million tons, and garbage treatment has become one big " bottleneck " of restriction urban development, have more than 200 city to be absorbed among the rubbish encirclement in 660 cities, the whole nation; Cause town and country calmodulin binding domain CaM environmental degradation, jeopardize Sustainable development.In addition; Collection and untreated rubbish can not grow and spread disease, forms odor pollution environment, a large amount of acid and alkaline organic pollutant of generation; Heavy metal in the dissolving rubbish; Become the source of pollution that organism, heavy metal and pathogenic micro-organism are concentrated, pollute surface water body on every side or infiltration underground water, cause the severe contamination of water resources.
Garbage treatment becomes question of common concern in the world wide day by day, is very arduous comprehensive, a systematic engineering.At present, using comparatively effectively that treatment process is a burning method, also is the waste disposal method that generally adopt present countries in the world, has that treatment capacity is big, to subtract capacitive good and the characteristics of energy recovery are arranged.Wherein, grate furnace is burnt away the refuse and is had the advantages that to sort the low rubbish of rubbish, suitable China's moisture height and calorific value.Angle from the thoroughness of disposing rubbish, innoxious, environmental protectionization; Cement producing line cooperative disposal rubbish is comparatively suitable; Grate furnace and the associating of cement firing system; Disposing the domestic refuse technology is ideal disposal of garbage mode (201120084369.7), and this method has the following advantages: 1) hot environment more than 850 ℃ makes that rubbish thoroughly burns, cracking; 2) alkaline condition of raw material, the sour gas and the material that make waste incineration produce absorbed by alkaline raw material, significantly reduced deleterious acidic gas and the Dioxins synthetic source once more in the flue gas; 3) make full use of the high temperature firing temperature and the grog formation condition of rotary system, the lime-ash that produces after the waste incineration is fired into cement clinker; 4) flying dust after the waste incineration and the harmful heavy metal in the slag are solid-solubilized in the grog, significantly reduce the heavy metal harm in the rubbish.
Lime-ash after the waste incineration mainly comprises two portions: flying dust and aphlogistic residue (slag), the heavy metal after the waste incineration mainly in flying dust, only contain few part heavy metal in the slag.In the cement manufacturing, slag can be used as cement raw material usefulness, also can be used as blended material and mix in the cement, and flying dust does not generally use as blended material.Lime-ash (flying dust and slag) is fired into cement as cement raw material, and slag and heavy metal thereof are solid-solubilized in the grog, and through hydrated cementitious, curing, the objectionable constituent in the slag is solidificated in cement or the concrete hydrating slurry, is safer disposal options.
At present the grate furnace slag that produces of burning away the refuse all is to reach the purpose that cooling is used through water-cooled; Not only consume great amount of water resources; And the water vapour that produces gets into incinerator and cement firing system; Can influence the stability of refuse burning system and cement kiln system, reduce the work-ing life of incinerator and cement kiln system device and refractory materials thereof; In addition, the lime-ash after the water-cooled has moisture, has increased the water cut of cement raw material, needs the oven dry heats that consume cement raw material more, influences the grinding and the drying efficiency of cement slurry simultaneously.
To above situation, cement producing line cooperative disposal domestic refuse needs a kind of energy-conservation disposal of ash and slag apparatus and method to solve the problems referred to above.
Summary of the invention
The invention provides the cinder from refuse incineration method of disposal and the implementation system of a kind of more energy-conservationization, environmental protectionization, safe, resource utilization to above problem.
To the invention provides a kind of cinder from refuse incineration method of disposal in order overcoming the above problems, to it is characterized in that: may further comprise the steps:
The first step: after rubbish burned through incinerator, flying dust got into incineration flue gas in the decomposing furnace of cement clinker firing system to get into raw material and is fired into cement clinker in the cement kiln;
Second step: after burning the after heat slag and discharging incinerator, in the garbage slag refrigerating unit, carry out air-cooledly through cooling air, cold wind and hot slag carry out becoming hot blast after the heat exchange and get into incinerator, supply the rubbish oven dry and burn use;
The 3rd step: hot slag is participated in batching through the incoming stock batching of the black furnace slag station after air-cooled as cement raw material, gets into the cement raw material grinding system again and carries out raw grinding;
The 4th step: black furnace slag and other raw materials grind into that the raw material powder is laggard goes into cement grog firing system, are fired into cement clinker.
The heat-exchanger rig that described garbage slag refrigerating unit of second step is freezing air and hot slag.
Feed incinerator or in incinerator, directly mix or get into incinerator again after first the mixing described separating through cold wind and hot blast after hot slag carries out heat exchange and other hot blasts that air supply line provides in second step.
The used freezing air of described garbage slag refrigerating unit is the refuse odor in the rubbish storage hole.
The mode that described cold wind of second step and hot slag carry out heat exchange is direct heat exchange or indirect heat exchange.
A kind of implementation system of cinder from refuse incineration method of disposal comprises decomposing furnace, garbage slag refrigerating unit, feed proportioning station, the cement raw material grinding system of incinerator, cement clinker firing system; It is characterized in that: described garbage slag refrigerating unit is connected with incinerator, and is arranged on the incinerator below; After rubbish burned through incinerator, flying dust got in the decomposing furnace of cement clinker firing system with incineration flue gas; After burning after heat slag discharge incinerator; In the garbage slag refrigerating unit, carry out air-cooled through cooling air; Cold wind and hot slag carry out becoming hot blast entering incinerator after the heat exchange; Hot slag is participated in batching through the incoming stock batching of the black furnace slag station after air-cooled as cement raw material, gets into the cement raw material grinding system again and carries out raw grinding; Black furnace slag and other raw materials grind into that the raw material powder is laggard goes into cement grog firing system, are fired into cement clinker.
Described garbage slag refrigerating unit is installed in the tail end of incinerator, is fixed together with incinerator, becomes an integrating device.
Be provided with lock wind discharge valve between cinder notch and the garbage slag refrigerating unit unloading of incinerator, on the garbage slag refrigerating unit, be provided with air outlet, air outlet is connected on the air supply line of incinerator.
Beneficial effect:
The present invention combines waste incineration with cement clinker production; The heat water supply mud production line raw material that waste incineration produces flue gas decomposes usefulness; Cinder is fired into cement clinker as the part of cement raw material, and that realizes rubbish subtracts appearanceization, resource utilization and harmlessness disposing.
The present invention makes full use of the heat of slag after the waste incineration, uses the chilled air cools garbage slag, and air is fed incinerator by hot slag heating back, for the rubbish oven dry, burn part of heat energy is provided.
The hot slag of the present invention by air cooling after, be convenient to transportation and cement slurry grinding system use; Compare with traditional water-cooled furnace slag cooler; The slag moisture-free; Be convenient to the oven dry and the grinding of cement slurry, reduce the moisture that a part gets into incinerator again, the incinerator of burning away the refuse and the cement firing system of treating refuse incineration flue gas all are beneficial to.
The present invention had both realized the cooling of waste incineration slag when refuse odor during as heat-eliminating medium, again refuse odor was realized thorough combustion decomposition and Water purification.
Lime-ash of the present invention is fired into cement clinker as cement raw material, is solid-solubilized in the grog and to be solidificated in cement or the concrete aquation slurry through hydrated cementitious, and be one of safer cinder from refuse incineration disposal options.
Description of drawings
Fig. 1 is a process flow diagram of the present invention;
Fig. 2 is an implementation system I synoptic diagram of the present invention;
Fig. 3 is an implementation system II synoptic diagram of the present invention;
Fig. 4 is an implementation system III synoptic diagram of the present invention;
Fig. 5 is an implementation system IV synoptic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is done further description.
It is extremely shown in Figure 5 like Fig. 1,
A kind of cinder from refuse incineration method of disposal,May further comprise the steps:
The first step: after rubbish burned through incinerator 1, flying dust got into incineration flue gas in the decomposing furnace of cement clinker firing system to get into raw material and is fired into cement clinker in the cement kiln;
Second step: after burning the after heat slag and discharging incinerator 1, carry out air-cooledly 3 li of garbage slag refrigerating units through cooling air, cold wind and hot slag carry out becoming hot blast after the heat exchange and get into incinerator 1, supply the rubbish oven dry and burn use;
The 3rd step: hot slag is participated in batching through the incoming stock batching of the black furnace slag station after air-cooled as cement raw material, gets into the cement raw material grinding system again and carries out raw grinding;
The 4th step: black furnace slag and other raw materials grind into that the raw material powder is laggard goes into cement grog firing system, are fired into cement clinker.
Second step, described garbage slag refrigerating unit 3 was the heat-exchanger rig of freezing air and hot slag, carried out heat exchange at garbage slag refrigerating unit 3 interior heat slags and freezing air, realized the cooling of garbage heat furnace slag and the heat treated of freezing air.
It is as shown in Figure 2,
The implementation system of this cinder from refuse incineration method of disposal,The decomposing furnace 2, garbage slag refrigerating unit 3, feed proportioning station, the cement raw material grinding system that comprise incinerator 1, cement clinker firing system.
Described garbage slag refrigerating unit 3 is connected with incinerator 1, and is arranged on incinerator 1 below; After rubbish burned through incinerator 1, flying dust got into 2 li of the decomposing furnaces of cement clinker firing system with incineration flue gas; After burning after heat slag discharge incinerator 1; Carry out air-cooled through cooling air for 3 li at the garbage slag refrigerating unit; Cold wind and hot slag carry out becoming hot blast entering incinerator 1 after the heat exchange; Hot slag is participated in batching through the incoming stock batching of the black furnace slag station after air-cooled as cement raw material, gets into the cement raw material grinding system again and carries out raw grinding; Black furnace slag and other raw materials grind into that the raw material powder is laggard goes into cement grog firing system, are fired into cement clinker.
Garbage slag refrigerating unit 3 is arranged on incinerator 1 back and uses, and the hot slag that incinerator is discharged directly is discharged into the slag refrigerating unit, and after hot slag and the freezing air heat exchange, heated air admission incinerator 1 supplies the rubbish oven dry, burns and use.
Described garbage slag refrigerating unit 3 comprises the refrigerating unit body, and the refrigerating unit upper part of body is provided with hot slag admission port, is provided with cooling air intake and slag relief outlet in the bottom of refrigerating unit body.
As shown in Figure 3, as a kind of improvement of the present invention, garbage slag refrigerating unit 3 is installed in the tail end of incinerator 1; Be fixed together with incinerator 1, become an integrating device, rubbish gets into cooling section through oven dry, burning, the afterburnt of incinerator 1; Promptly get into garbage slag refrigerating unit 3; After hot slag and the cooling air heat exchange, other hot gas that heated air and incinerator are 1 li mixes for 1 li at incinerator, supplies the rubbish oven dry, burns and use.
As shown in Figure 4; As a kind of improvement of the present invention; Described garbage slag refrigerating unit 3 is arranged on incinerator 1 back and uses, and installs lock wind discharge valve 4 between cinder notch and the garbage slag refrigerating unit 3 additional unloading of incinerator, controls hot slag discharging and lock wind; On garbage slag refrigerating unit 3, be provided with air outlet 5, air outlet 5 is connected on the air supply line of incinerator 1.The hot slag that incinerator 1 is discharged is discharged into garbage slag refrigerating unit 3 backs and closes locking wind discharge valve 4; After hot slag and the cooling air direct heat exchange; Heated air is discharged the back through air outlet 5 and is mixed earlier on the air supply line of incinerator 1 with other hot blasts of incinerator 1 and get into incinerator 1 again, supplies rubbish oven dry, burning usefulness.
As shown in Figure 5; As a kind of improvement of the present invention, described garbage slag refrigerating unit 3 used freezing airs are the refuse odor in the rubbish storage hole, and refuse odor and hot slag carry out heat exchange; To realize the cooling of garbage slag; And heated foul smell is sent into incinerator 1 supply the rubbish oven dry, burn and use, the flue gas of generation feeds the decomposing furnace 2 of cement firing system, the harmful molecular breakdown of foul smell is fallen and reached the purpose of gas cleaning.
As a kind of improvement of the present invention; Garbage slag refrigerating unit 3 can be designed as hot slag and cooling air carries out indirect heat exchange; Slag and cooling air are accomplished heat exchange through contactless heat transfer, and cooling air gets into incinerator after by indirect heating, supplies rubbish oven dry, burning to use.For example: in garbage slag refrigerating unit 3, be provided with the dividing plate of good heat conduction effect, dividing plate is divided into freezing air cavity and hot slag cavity with garbage slag refrigerating unit 3, freezing air cavity inlet mouth and air outlet, and the air outlet links to each other with incinerator 1.
The present invention gives full play to the advantage that new dry cement production technology is disposed rubbish, and cinder from refuse incineration is all dissolved and processed cement clinker, and the pollutents such as heavy metal in the rubbish are solid-solubilized in the cement clinker; The present invention carries out air cooling to the hot slag of waste incineration, has both realized the cooling of garbage slag, is convenient to follow-up transportation and raw grinding, and the heat energy that makes full use of hot slag again comes the heats cold air, uses for rubbish oven dry, burning.The present invention has realized innoxious whole disposal of cinder, brings extra moisture content oven dry energy consumption for again the preparation of cement raw material, is the method for disposal and the production technique of a kind of energy-conservation, the safety in cement kiln synergic processing rubbish field, environmental protection.
The above is merely the preferred embodiments of the present invention, is not restricted to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.
Claims (8)
1. cinder from refuse incineration method of disposal is characterized in that: may further comprise the steps:
The first step: after rubbish burned through incinerator (1), decomposing furnace (2) lining that flying dust gets into the cement clinker firing system with incineration flue gas got into raw material and is fired into cement clinker in the cement kiln;
Second step: after burning after heat slag discharge incinerator (1); Carry out air-cooled through cooling air in garbage slag refrigerating unit (3) lining; Cold wind and hot slag carry out becoming hot blast entering incinerator (1) after the heat exchange, supply the rubbish oven dry and burn use;
The 3rd step: hot slag is participated in batching through the incoming stock batching of the black furnace slag station after air-cooled as cement raw material, gets into the cement raw material grinding system again and carries out raw grinding;
The 4th step: black furnace slag and other raw materials grind into that the raw material powder is laggard goes into cement grog firing system, are fired into cement clinker.
2. a kind of cinder from refuse incineration method of disposal according to claim 1 is characterized in that: the second described garbage slag refrigerating unit of step (3) is the heat-exchanger rig of freezing air and hot slag.
3. a kind of cinder from refuse incineration method of disposal according to claim 1 is characterized in that: feed incinerator (1) or in incinerator (1), directly mix or get into incinerator (1) again after first the mixing described separating through cold wind and hot blast after hot slag carries out heat exchange and other hot blasts that air supply line provides in second step.
4. a kind of cinder from refuse incineration method of disposal according to claim 2 is characterized in that: the used freezing air of described garbage slag refrigerating unit (3) is the refuse odor in the rubbish storage hole.
5. a kind of cinder from refuse incineration method of disposal according to claim 1 is characterized in that: the mode that described cold wind of second step and hot slag carry out heat exchange is direct heat exchange or indirect heat exchange.
6. the implementation system of a cinder from refuse incineration method of disposal is characterized in that: the decomposing furnace (2), garbage slag refrigerating unit (3), feed proportioning station, the cement raw material grinding system that comprise incinerator (1), cement clinker firing system; Described garbage slag refrigerating unit (3) is connected with incinerator (1), and is arranged on incinerator (1) below; After rubbish burned through incinerator (1), flying dust got into decomposing furnace (2) lining of cement clinker firing system with incineration flue gas; After burning after heat slag discharge incinerator (1); Carry out air-cooled through cooling air in garbage slag refrigerating unit (3) lining; Cold wind and hot slag carry out becoming hot blast entering incinerator (1) after the heat exchange; Hot slag is participated in batching through the incoming stock batching of the black furnace slag station after air-cooled as cement raw material, gets into the cement raw material grinding system again and carries out raw grinding; Black furnace slag and other raw materials grind into that the raw material powder is laggard goes into cement grog firing system, are fired into cement clinker.
7. the implementation system of a kind of cinder from refuse incineration method of disposal according to claim 6; It is characterized in that: described garbage slag refrigerating unit (3) is installed in the tail end of incinerator (1); Be fixed together with incinerator (1), become an integrating device.
8. according to the implementation system of claim 6 or 7 described a kind of cinder from refuse incineration methods of disposal; It is characterized in that: be provided with lock wind discharge valve (4) between cinder notch and the garbage slag refrigerating unit (3) unloading of incinerator; On garbage slag refrigerating unit (3), be provided with air outlet (5), air outlet (5) is connected on the air supply line of incinerator (1).
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| CN2012102345229A CN102730993A (en) | 2012-07-09 | 2012-07-09 | Treatment method and implementation system for refuse incineration ash |
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| CN2012102345229A CN102730993A (en) | 2012-07-09 | 2012-07-09 | Treatment method and implementation system for refuse incineration ash |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103951293A (en) * | 2014-04-24 | 2014-07-30 | 尹小林 | Method and system for drying and incinerating urban household garbage through dry-process rotary kiln |
| EP2778523A1 (en) * | 2013-03-14 | 2014-09-17 | Hitachi Zosen Inova AG | Slag processing device |
| CN104803620A (en) * | 2015-04-02 | 2015-07-29 | 胜利油田营海实业集团有限公司 | Application process of pozzolanic mixed material in general cement |
| CN106678831A (en) * | 2016-12-30 | 2017-05-17 | 安徽海螺川崎工程有限公司 | Cement kiln fly ash coprocessing system and processing process of cement kiln fly ash coprocessing system |
| CN108800155A (en) * | 2018-05-28 | 2018-11-13 | 广州创盈环境科技有限公司 | A kind of dangerous waste disposal technique and its system |
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| CN202688202U (en) * | 2012-07-09 | 2013-01-23 | 南京凯盛国际工程有限公司 | Rubbish incineration ash disposing system |
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Patent Citations (2)
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| CN101786809A (en) * | 2009-12-31 | 2010-07-28 | 安徽海螺建材设计研究院 | Garbage disposal system used in cement dry kiln production and disposal method thereof |
| CN202688202U (en) * | 2012-07-09 | 2013-01-23 | 南京凯盛国际工程有限公司 | Rubbish incineration ash disposing system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2778523A1 (en) * | 2013-03-14 | 2014-09-17 | Hitachi Zosen Inova AG | Slag processing device |
| CN103951293A (en) * | 2014-04-24 | 2014-07-30 | 尹小林 | Method and system for drying and incinerating urban household garbage through dry-process rotary kiln |
| CN103951293B (en) * | 2014-04-24 | 2015-09-09 | 尹小林 | Dry-process rotary kiln is dry, the method and system of burning application of city life garbage |
| CN104803620A (en) * | 2015-04-02 | 2015-07-29 | 胜利油田营海实业集团有限公司 | Application process of pozzolanic mixed material in general cement |
| CN106678831A (en) * | 2016-12-30 | 2017-05-17 | 安徽海螺川崎工程有限公司 | Cement kiln fly ash coprocessing system and processing process of cement kiln fly ash coprocessing system |
| CN108800155A (en) * | 2018-05-28 | 2018-11-13 | 广州创盈环境科技有限公司 | A kind of dangerous waste disposal technique and its system |
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Application publication date: 20121017 |