CN101476729A - Drying pretreatment method and device for urban domestic garbage - Google Patents
Drying pretreatment method and device for urban domestic garbage Download PDFInfo
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- CN101476729A CN101476729A CNA2008102295859A CN200810229585A CN101476729A CN 101476729 A CN101476729 A CN 101476729A CN A2008102295859 A CNA2008102295859 A CN A2008102295859A CN 200810229585 A CN200810229585 A CN 200810229585A CN 101476729 A CN101476729 A CN 101476729A
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/12—Heat utilisation in combustion or incineration of waste
Abstract
The invention relates to a method and a device for drying pretreatment on municipal domestic refuse by municipal domestic refuse incineration technology. The invention adopts the technical proposal that the method comprises: incinerating the municipal domestic refuse, removing dust of the municipal domestic refuse, taking fume guided out of a fume extractor as a heat source for drying the domestic refuse, and utilizing the fume residual heat to dry the domestic refuse to be treated. The device and the method have the advantages that: 1) high-temperature fume generated from incineration is utilized to dry the domestic refuse, thereby fully recycling the heat energy, and having no influence on the steam generation amount and electricity generation amount synchronously; 2) the high-temperature fume generated from incineration is utilized to dry the domestic refuse, thereby reducing moisture in the refuse, improving 300 to 400 kacal/kg of lower heating value of the refuse, reducing auxiliary fuel addition amount, and reducing operation cost; and 3) after the refuse is dried, because partial moisture in the refuse is discharged, the total amount of the incinerated refuse is reduced, the scale of a incinerator can be reduced, and equipment investment is reduced.
Description
Technical field
The present invention relates to the treatment technology of municipal refuse, be specifically related to be used for the domestic waste drying pretreatment method and the device of burning city domestic garbage technology.
Background technology
Urban garbage disposal is the common issue that present countries in the world face.The harm of house refuse mainly shows as: the one, and communicate illness is detrimental to health, especially cholera bacteria, tulase and roundworm egg etc.; The 2nd, worsen environment, the harm environmental quality; The 3rd, destroy resource, the harm ecological balance, refuse pollution all has very serious harmfulness to water resource, subterranean resource, environmental resource and plant growth; The 4th, the rubbish explosion accident constantly takes place.The annual production of China's domestic waste is up to more than 1.7 hundred million tons, and every year is with about 10% speed increase; But the harmless treatment rate less than 1/3 of present China domestic waste, house refuse has become the significant problem of puzzlement economic development and environmental improvement.
At present, China's domestic waste method of disposal mainly contains sanitary landfills, During High-Temperature Composting, burning and recycling comprehensive treatment etc.Wherein topmost mode is a landfill, accounts for more than 70% of whole disposal amounts; It is less to burn shared ratio, and burning mainly concentrates on developed areas such as southeastern coast and provincial capital.Burning method is a kind of high-temperature heat treatment technology, its technical process is as solid fuel with domestic waste, drop in the special-purpose incinerator, under hot conditions, violent chemical reaction takes place in combustible component in the rubbish and airborne oxygen, emit heat, be converted into the solid-state slag of high-temperature combustion gas and stable in properties.The advantage of the method: one, subtract hold effective.But waste incineration decrement 80～90% can effectively solve the garbage-surrounded city phenomenon; Two, reduce land use area, solved the problem of the difficulty of city refuse landfill addressing effectively; Three, incineration temperature height, rubbish can be utterly destroyed the infective pathogen body through high temperature incineration more than 850 ℃ in special-purpose incinerator.
But because content of organics is not very high in present China domestic waste, low heat value is low (to be generally 700～1400kcal/kg), auxiliary fuel must be added and just normal combustion can be kept, the burning facility one-time investment is big, operating cost is high, needs very high garbage disposal subsidy just can keep normal burning operation.
In order to adapt to the low characteristics of the high and low position of China's refuse moisture content calorific capacity, improve the burning usefulness of incinerator, numerous equipment are given birth to manufacturers and R﹠D institution, have taked a lot of raisings to go into burn away the refuse low heat value and improve the method for incinerator combustion system of stove.In the improvement of incinerator, the general employing prolongs dryer section, increases the method for drying time; Secondly be exactly that the portion of hot flue gas behind the deduster is introduced the incinerator dryer section as drying medium, improve combustion position, improve ignition temperature; Be exactly to utilize waste heat boiler high-temperature steam heating combustion air once more, and then improve the combustion position of incinerator.
Though more than several combustion positions that improve incinerator and the method that improves the rubbish low heat valve obtained good effect, all have certain problem.The first, prolong the incinerator dryer section, increase drying time,, need absorb a large amount of heats in dryer section rubbish is carried out drying though rubbish improves at the burning zone combustion position, for the thermal balance of whole incinerator, final ignition temperature does not change; And this mode is only applicable to grate furnace, is not suitable for fluid bed; The second, the portion of hot flue gas behind the deduster is extracted out and is introduced the incinerator dryer section, but this mode only is that the waste gas of fraction is recycled, DeGrain, and be only applicable to grate furnace, be not suitable for fluid bed; Three, utilizing the waste heat boiler high-temperature steam to heat combustion air increases heat, improves incineration temperature, but with the consumption quantity of steam, and then the minimizing generated energy is a cost.
Summary of the invention
At the above deficiency of prior art, the purpose of this invention is to provide a kind of heat that reclaims in the existing CIU discharging flue gas, utilize the consumer waste incineration discharged flue gas that domestic waste is carried out dry pretreated method and device fully.
For achieving the above object, the present invention is achieved through the following technical solutions:
With the flue gas of drawing from induced-draft fan after burning city domestic garbage, the dedusting thermal source, utilize the dry pending house refuse of fume afterheat as dry house refuse.Concrete steps are as follows:
1) rubbish was selected Bulky Waste earlier and is sent refuse grinder to carry out break process before sending into the drying machine hopper, mixed homogenizing then, by batcher rubbish was sent into and was carried out drying in the drying machine;
2) by 140～150 ℃ that draw behind the incinerator induced-draft fan high-temperature flue gas, the hot blast conveying pipe road of drying machine enters in the drying machine, as the drying garbage medium;
3) rubbish is dried in drying machine, and 10～15% moisture becomes steam and enters dry back waste gas air-introduced machine with the exhaust emission tube road of the common drying machine of dry waste gas in the rubbish; Rubbish is discharged because of 10～15% moisture, and low heat value can improve 300～400kcal/kg;
4) fall on the garbage conveyor through the rubbish of drying machine drying, send into rubbish storage hole, prepare to carry out burning disposal by garbage conveyor; Small garbage that leaks down in the drying machine bottom and dirt etc. are also delivered to rubbish storage hole by ash conveyor, prepare to carry out burning disposal;
5) dry back temperature is that 110～120 ℃ waste gas is drawn by the waste gas air-introduced machine, sends into waste gas purification apparatus and carries out deodourizing and handle, and back up to standard enters atmosphere by chimney.
The equipment of realizing said method comprises: hopper, batcher, drying machine, ash conveyor, garbage conveyor, waste gas air-introduced machine, waste gas purification apparatus, chimney, rubbish storage hole etc.Connect batcher below the hopper, batcher is connected to drying machine rubbish material inlet, the high-temperature flue gas pipeline of drawing from induced-draft fan after waste incineration, the dedusting links to each other with the hot blast conveying pipe road of drying machine bottom, drying machine exhaust emission tube road is connected to waste gas air-introduced machine inlet, the outlet of waste gas air-introduced machine is connected to the waste gas purification apparatus inlet, and the waste gas purification apparatus outlet feeds chimney; Garbage conveyor connects the drying machine rubbish material and is exported to rubbish storage hole, establishes ash conveyor below drying machine, and small garbage that drier conveyer is leaked down and dirt etc. are delivered to rubbish storage hole.
Compared with prior art, the present invention has following advantage:
1) the high temperature flue gas drying house refuse that utilize to burn produces is fully recycled heat energy, simultaneously to the generation of steam and generated energy without any influence;
2) utilize the high temperature flue gas drying house refuse of burning generation, reduced moisture in the rubbish, improved rubbish low heat value 300～400kcal/kg, reduced the auxiliary fuel addition, reduced operating cost;
3) behind the drying garbage, because of the discharge of part moisture in the rubbish, the rubbish total amount of burning reduces, and can reduce the scale of incinerator, reduces equipment investment;
4) drying back waste gas is realized qualified discharge fully by biochemical purification device purified treatment, to not influence of environment.
Description of drawings
Fig. 1 is the system process figure of domestic waste drying pretreatment method of the present invention and device.
The specific embodiment
As shown in Figure 1, the domestic waste drying pretreatment method, rubbish is before sending into the drying machine hopper, earlier Bulky Waste being selected send refuse grinder to carry out break process, mix homogenizing then, the good rubbish that will mix homogenizing is again packed in the rubbish drying machine hopper 1, by garbage feeding machine 2 rubbish is pushed and carries out drying in the rubbish drying machine 3; By 140～150 ℃ that draw behind the incinerator induced-draft fan high-temperature flue gas, the hot blast conveying pipe road 10 of drying machine bottom enters in the drying machine 3, as the drying garbage medium; House refuse is dried on the conveyer belt of drying machine 3, and 10～15% moisture becomes steam and enters dry back waste gas air-introduced machine 6 by the exhaust emission tube road 11 at drying machine top together with dry waste gas in the rubbish; Rubbish is discharged because of 10%～15% moisture, and low heat value can improve 300～400kcal/kg; Rubbish through drying machine 3 dryings is fallen on the garbage conveyor 5, is admitted to rubbish storage hole 9, prepares to carry out burning disposal.Small garbage that the conveyer belt of drying machine 3 leaks down and dirt etc. are collected by ash conveyor 4, because this part lime-ash is difficult for burning, so the mode of taking directly to drain is handled, so both saved cost of transportation, also alleviated simultaneously the pressure of incinerator, saved the energy, the waste gas that dry back is 110～120 ℃ is drawn by waste gas air-introduced machine 6, send into waste gas purification apparatus 7 and carry out the deodourizing processing, back up to standard enters atmosphere by chimney 8.
Claims (6)
1, a kind of drying pretreatment method of domestic waste is characterized in that, with the flue gas of drawing from induced-draft fan after burning city domestic garbage, the dedusting thermal source as dry house refuse, utilizes the dry pending house refuse of fume afterheat.
2, the drying pretreatment method of a kind of domestic waste according to claim 1 is characterized in that, concrete steps are as follows:
1) rubbish is sent in the drying machine hopper (1), by batcher (2) rubbish is sent in the drying machine (3) and carried out drying;
2) by 140～150 ℃ that draw behind the incinerator induced-draft fan high-temperature flue gas, the hot blast conveying pipe road (9) of drying machine (3) enters in the drying machine (3), as the drying garbage medium;
3) rubbish is dried in drying machine (3), and 10～15% moisture becomes steam and enters dry back waste gas air-introduced machine (6) with the exhaust emission tube road (10) of the common drying machine of dry waste gas (3) in the rubbish;
4) fall on the garbage conveyor (5) through the dry rubbish of drying machine (3), send into rubbish storage hole (9), prepare to carry out burning disposal by garbage conveyor (5); Small garbage that leaks down in drying machine (3) bottom and dirt etc. are collected by ash conveyor (4), and the mode of taking directly to drain is handled;
5) dried waste gas is drawn by waste gas air-introduced machine (6), sends into waste gas purification apparatus (7) and carries out the deodourizing processing, and back up to standard enters atmosphere by chimney (8).
3, the drying pretreatment method of domestic waste according to claim 2, it is characterized in that rubbish is being sent into drying machine hopper (1) before, Bulky Waste is selected sent refuse grinder to carry out break process earlier, mix homogenizing then, send into drying machine and carry out drying.
4, the drying pretreatment method of domestic waste according to claim 2 is characterized in that, dried EGT is 110～120 ℃.
5, the device that is used for claim 1 or 2 described a kind of domestic waste preprocess methods, it is characterized in that, comprise hopper (1), batcher (2), drying machine (3), ash conveyor (4), garbage conveyor (5), waste gas air-introduced machine (6), waste gas purification apparatus (7), chimney (8), rubbish storage hole (9), connect batcher (2) below the hopper (1), batcher (2) is connected to drying machine (3) rubbish material inlet, waste incineration, the high-temperature flue gas pipeline of drawing from induced-draft fan after the dedusting links to each other with the hot blast conveying pipe road (10) of drying machine (3) bottom, drying machine exhaust emission tube road (11) is connected to waste gas air-introduced machine (6) inlet, waste gas air-introduced machine (6) outlet is connected to waste gas purification apparatus (7) inlet, and waste gas purification apparatus (7) outlet feeds chimney (8); Garbage conveyor (5) connects drying machine (3) rubbish material and is exported to rubbish storage hole (9).
6, the device of a kind of domestic waste drying pretreatment method according to claim 5, it is characterized in that, establish ash conveyor (4) in drying machine (3) below, small garbage that drying machine (3) conveyer belt is leaked down and dirt etc. are delivered to rubbish storage hole (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102295859A CN101476729A (en) | 2008-12-11 | 2008-12-11 | Drying pretreatment method and device for urban domestic garbage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102295859A CN101476729A (en) | 2008-12-11 | 2008-12-11 | Drying pretreatment method and device for urban domestic garbage |
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| CN101476729A true CN101476729A (en) | 2009-07-08 |
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| CNA2008102295859A Pending CN101476729A (en) | 2008-12-11 | 2008-12-11 | Drying pretreatment method and device for urban domestic garbage |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557763A (en) * | 2010-12-07 | 2012-07-11 | 福建省丰泉环保控股有限公司 | Integrated method of preparation of fertilizer from livestock and poultry manure and waste incineration |
| CN103032879A (en) * | 2012-11-29 | 2013-04-10 | 一重集团大连设计研究院有限公司 | Purified flue gas treatment device for domestic waste incineration plant |
| CN104990089A (en) * | 2015-07-20 | 2015-10-21 | 重庆盎瑞悦科技有限公司 | Solid waste harmless high-temperature incineration disposal system and method |
| CN105114956A (en) * | 2015-09-16 | 2015-12-02 | 潍坊金丝达新能源科技有限公司 | High-temperature rubbish gasification power generation system |
| CN105318694A (en) * | 2014-07-15 | 2016-02-10 | 福建正仁环保有限公司 | Domestic garbage drying equipment |
| CN105351944A (en) * | 2015-12-10 | 2016-02-24 | 重庆三峰卡万塔环境产业有限公司 | Modified grate furnace waste incineration device |
| CN105757676A (en) * | 2016-03-01 | 2016-07-13 | 赵君华 | Garbage cracking furnace system |
| CN108036326A (en) * | 2017-12-25 | 2018-05-15 | 珠海市建华锅炉机械工程有限公司 | A kind of wastes pre-processing system and its technique |
| CN108469028A (en) * | 2018-05-31 | 2018-08-31 | 唐立乾 | A kind of equipment using Brown Gas burning domestic garbage |
| CN110736331A (en) * | 2019-10-23 | 2020-01-31 | 深圳龙澄高科技环保股份有限公司 | Heat-carrying air source system of garbage dryer |
| CN115069721A (en) * | 2022-05-13 | 2022-09-20 | 华电电力科学研究院有限公司 | Combustible waste treatment device and method |
-
2008
- 2008-12-11 CN CNA2008102295859A patent/CN101476729A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557763A (en) * | 2010-12-07 | 2012-07-11 | 福建省丰泉环保控股有限公司 | Integrated method of preparation of fertilizer from livestock and poultry manure and waste incineration |
| CN103032879A (en) * | 2012-11-29 | 2013-04-10 | 一重集团大连设计研究院有限公司 | Purified flue gas treatment device for domestic waste incineration plant |
| CN103032879B (en) * | 2012-11-29 | 2015-02-04 | 一重集团大连设计研究院有限公司 | Purified flue gas treatment device for domestic waste incineration plant |
| CN105318694A (en) * | 2014-07-15 | 2016-02-10 | 福建正仁环保有限公司 | Domestic garbage drying equipment |
| CN105318694B (en) * | 2014-07-15 | 2017-11-07 | 福建正仁环保有限公司 | A kind of house refuse drying equipment |
| CN104990089B (en) * | 2015-07-20 | 2017-06-23 | 重庆盎瑞悦科技有限公司 | The innoxious high temperature incineration processing system of solid waste and method |
| CN104990089A (en) * | 2015-07-20 | 2015-10-21 | 重庆盎瑞悦科技有限公司 | Solid waste harmless high-temperature incineration disposal system and method |
| CN105114956A (en) * | 2015-09-16 | 2015-12-02 | 潍坊金丝达新能源科技有限公司 | High-temperature rubbish gasification power generation system |
| CN105114956B (en) * | 2015-09-16 | 2017-07-11 | 潍坊金丝达新能源科技有限公司 | High temperature garbage gasification power generation system |
| CN105351944A (en) * | 2015-12-10 | 2016-02-24 | 重庆三峰卡万塔环境产业有限公司 | Modified grate furnace waste incineration device |
| CN105757676A (en) * | 2016-03-01 | 2016-07-13 | 赵君华 | Garbage cracking furnace system |
| CN108036326A (en) * | 2017-12-25 | 2018-05-15 | 珠海市建华锅炉机械工程有限公司 | A kind of wastes pre-processing system and its technique |
| CN108469028A (en) * | 2018-05-31 | 2018-08-31 | 唐立乾 | A kind of equipment using Brown Gas burning domestic garbage |
| CN110736331A (en) * | 2019-10-23 | 2020-01-31 | 深圳龙澄高科技环保股份有限公司 | Heat-carrying air source system of garbage dryer |
| CN115069721A (en) * | 2022-05-13 | 2022-09-20 | 华电电力科学研究院有限公司 | Combustible waste treatment device and method |
| CN115069721B (en) * | 2022-05-13 | 2023-12-26 | 华电电力科学研究院有限公司 | Combustible waste treatment device and method |
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Open date: 20090708 |