CN103244957A - Integral treatment method for drying and incinerating sludge - Google Patents
Integral treatment method for drying and incinerating sludge Download PDFInfo
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- CN103244957A CN103244957A CN2012100469299A CN201210046929A CN103244957A CN 103244957 A CN103244957 A CN 103244957A CN 2012100469299 A CN2012100469299 A CN 2012100469299A CN 201210046929 A CN201210046929 A CN 201210046929A CN 103244957 A CN103244957 A CN 103244957A
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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
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The invention discloses an integral treatment method for drying and incinerating sludge. The integral treatment method includes steps of treating the original sludge by a dehydrator so that the moisture content of treated sludge ranges from 70% to 90%; atomizing the sludge with the moisture content ranging from 70% to 90%, treating atomized sludge by a spray dryer to obtain dry sludge and feeding tail gas generated by the spray dryer into a fluidized bed incinerator; feeding the dry sludge into fluidized bed incinerator to incinerate the dry sludge; and feeding flue gas generated in an incineration procedure of the fluidized bed incinerator into a flue after ash is separated from the flue gas by a separator, discharging a part of the flue gas in the flue, feeding another part of the flue gas into the spray dryer, enabling the ash to return the fluidized bed incinerator via a return feeder, and discharging slag generated in an incineration procedure of the fluidized bed incinerator via a slagging pipe. The integral treatment method has the advantages that a drying process and an incineration process which are independent from each other originally are organically combined with each other, waste heat generated in a drying procedure is effectively utilized, waste water and odor treatment systems are omitted, the cost is saved, pollution is obviously reduced, and the integral treatment method is favorable for environmental protection.
Description
Technical field
The present invention relates to the processing method of a kind of sludge drying and burning, relate in particular to a kind of with sludge drying and burn the integrated sludge drying and incinerating treatment method employing that two independent flow processs organically combine.
Background technology
In recent years, the construction speed of wastewater treatment in China factory is very fast, takes on a certain scale.Under the policy pulling, also performance is positive on sewage treatment plant builds for each place government and enterprise, but all do not relate to Treatment of Sludge on the foundation of investment for many years, to such an extent as to mud is under the situation that does not obtain dealing carefully with, cause secondary pollution, make sewage disposal lose meaning to a certain extent.According to incompletely statistics, at present, by the end of the year 2010, Chinese domestic accumulative total is built up 2832 of urban wastewater treatment firms, and sewage treatment capacity reached for 1.25 billion cubic meter/days, nearly 140,000 tons/day of corresponding dewatered sludge amount.During 12, the whole nation is with newly-built at least 1184 urban wastewater treatment firms, and the processing handling problems of mud can not be ignored.
Sewage and mud are two systems that solve municipal water pollution problem tight association again of equal importance.It is the guarantee that sewage disposal is finally implemented that Treatment of Sludge is disposed.In developed country, it is extremely important link that Treatment of Sludge is disposed, and its investment accounts for 50～70% of sewage treatment plant's gross investment.And very low in China's sewage sludge harmlessness handling rate, even flourishing city also only is 20～25%, mud becomes the topmost secondary pollution of municipal sewage treatment source.Growing with each passing day of mud generation forms sharp-pointed contradiction with the wretched insufficiency of Treatment of Sludge ability, the serious backwardness of processing means, a large amount of wet mud is arbitrarily transported outward, simply landfill or stacking, cause many cities the phenomenon in " mud besieged city " to occur, the Treatment of Sludge problem has become the urban environment problem that China can't avoid.
Treatment of Sludge should be followed " Four Modernizations " principle namely: minimizing, stabilisation, resource and innoxious.Because the volume content of moisture is huge in the mud, carry out " Four Modernizations " to mud and handle, then mud effectively being dewatered is an only stage which must be passed by.Mud still has 70%～85% moisture content behind mechanical dehydration, volume and quality are still very big, need make further drying and other treatment, reducing second environmental pollution, and creates conditions for the final disposal of mud.Treatment of Sludge is the process of a high energy consumption, high investment, is that mainly moisture content is difficult to further dewater by the mechanical dehydration machine with interior mud 80%, and common method is to adopt heating evaporation that water is removed.This is that energy consumes maximum link in the sludge handling process, also is the principal element that determines the Treatment of Sludge cost.
The more Treatment of Sludge method of disposal of domestic and international application is the method for burning after the first mummification at present, namely earlier mud is carried out burning again after the preliminary treatment such as mummification, the drying and incineration of mud is finished by the essentially independent system of two covers, complex process, the investment of equipment height, and the drying process of mud also needs to consume big energy, thereby operating cost is high.
Summary of the invention
Purpose of the present invention is a kind of with sludge drying and burn the integrated sludge drying and incinerating treatment method employing that two independent flow processs organically combine with regard to being to provide in order to address the above problem.
In order to achieve the above object, the present invention has adopted following technical scheme:
The present invention includes following steps:
(1) handle primary sludge with dewaterer, the moisture content of handling back mud is 70～90%;
(2) be that 70～90% mud atomizes to described moisture content, adopt spray dryer to handle in the mud after the atomizing, obtain dewatered sludge, the tail gas that described spray dryer produces enters fluidized bed incinerator;
(3) described dewatered sludge enters described fluidized bed incinerator burning;
(4) described fluidized bed incinerator burns the flue gas that produces and enter flue after separator is isolated lime-ash, part of smoke discharging in the described flue, another part flue gas enters described spray dryer, described lime-ash returns described fluidized bed incinerator through material returning device, and described fluidized bed incinerator burns the slag that produces and discharges through scum pipe.
In spray dryer, will contact with the part that fluidized bed incinerator burns in the flue gas that produces again after the mud atomizing, moment can be fallen the most of water evaporates in the atomizing mud, thereby obtains the very low dewatered sludge of water content; When carrying out drying and other treatment, dewatered sludge after the mummification and the tail gas in the drying process are sent into the fluidized bed incinerator burning, and with the flue gas that fluidized bed incinerator burn to produce carry out gas, dirt separate, purify after wherein a part send spray dryer back to and carry out Btu utilization, another part discharging.In the said process, the burning flow process of in the drying and other treatment flow process of in the spray dryer mud being carried out and the fluidized bed incinerator dewatered sludge being carried out cooperatively interacts, the waste water of the former generation and the drainage pollution problem of foul smell had both been solved, the heat that has utilized the latter to produce again, a whole set of process system perfect adaptation, the disposable Treatment of Sludge problem that solved.
Particularly, in the described step (2), be that 70～90% mud atomizes and adopts high-pressure atomization or centrifugal atomizing to described moisture content.High-pressure atomization and centrifugal atomizing all are atomizing types commonly used, are the mature technologies in atomizing field, do not repeat them here.
As preferably, in the described step (2), utilize to enter the flue gas of described spray dryer in the described flue of step (4) and contact with mud after the described atomizing, make the mud after the atomizing lose most of moisture content, obtain dewatered sludge.In this process, the most important thing is the mud after flue gas and the atomizing is mixed, make both full contacts, reach the purpose of high-efficiency evaporating moisture content.
Further, in the described step (2), the moisture content of described dewatered sludge is 5～25%, and it is abundant to be convenient to follow-up burning; In the described step (3), the incineration temperature of described fluidized bed incinerator is 850～900 ℃, burns so thoroughly, and lime-ash is less in the eliminating flue gas.
In order to make the burning in the fluidized bed incinerator more abundant, in the described step (3), in the described burning process, in described fluidized bed incinerator, add auxiliary fuel, described auxiliary fuel is one or more in coal, oil, natural gas, living beings and the discarded object; In the described step (2), the part of the tail gas that described spray dryer produces enters the bottom of described fluidized bed incinerator as secondary wind, and another part enters the high-temperature region, top of described fluidized bed incinerator; In the described step (2), enter bottom and the bottom of described fluidized bed incinerator after a described wind and the preheating of described secondary wind process air preheater respectively; In the described step (3), the bottom of described fluidized bed incinerator enters wind one time, and a described wind is air.
In order further to utilize the heat of flue gas, in the described step (4), discharge again after discharged flue gas process waste heat boiler and the air preheater cooling in the described flue.
As preferably, in the described step (4), described slag is used for brickmaking or as the overburden soil of refuse landfill, forms resource reutilization.
Beneficial effect of the present invention is:
Compare independently Treatment of Sludge flow process of two of traditional sludge drying and sludge incinerations, the present invention has saved cost, and has significantly reduced pollution, is conducive to environmental protection, is embodied as:
1, energy-conservation: integrated sludge drying and incinerating treatment method employing of the present invention, it is one that two handling processes of drying and incineration are organically combined, and has reduced the big energy that mud drying process consumes;
2, operating cost is low: integrated sludge drying and incinerating treatment method employing of the present invention, and energy reclaims substantially, and more traditional sludge drying and incinerating treatment method employing saved waste water and foul smell treatment system, so operating cost is low;
3, environmental protection: in the present invention, the foul smell that sludge drying produces enters fluidized bed incinerator and burns, and can not produce environmental pollution;
4, resource rational utilization: the waste residue that mud produces after the inventive method is handled can mix clay and be used for baking light bricks, can be used for doing light ceramic, also can be used as the overburden soil of refuse landfill;
5, save investment: the present invention organically combines two handling processes of drying and incineration for one, has reduced dump midway and the transportation of mud, has saved investment.
Description of drawings
Accompanying drawing is the process schematic diagram of integrated sludge drying and incinerating treatment method employing of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is further described in detail:
As shown in drawings, the used equipment of the present invention comprises spray dryer 1, fluidized bed incinerator 2, separator 3, material returning device 4, flue 12, air preheater 10 and waste heat boiler 9.
Below in conjunction with accompanying drawing the present invention is further described in detail:
At first, handle primary sludge with dewaterer, the moisture content of handling back mud 5 is 70～90%, and this process adopts the method for traditional dewatered sludge.
Then, be that 70～90% mud 5 injects in the spray dryers 1 and carries out high-pressure atomization or centrifugal atomizing with moisture content, simultaneously, the hot flue gas of a part in the flue 12 enters in the spray dryer 1, mix with the mud after the atomizing, make the most of moisture content flash evapn in the mud of atomizing back, thereby obtain dewatered sludge, its moisture content is 5～25%; Dewatered sludge enters the mud inlet of fluidized bed incinerator 2 bottoms from the mud mouth of spray dryer 1 bottom, burns in fluidized bed incinerator 2, and incineration temperature is 850～900 ℃; In the tail gas that spray dryer 1 produces, a part of tail gas burns through the laggard bottoms of going in the fluidized combustion stove 2 of air preheater 10 as secondary wind 6, and another part tail gas feeds the high-temperature region, top of fluidized bed incinerator 2; Simultaneously, wind 8 is through the laggard bottom of going in the fluidized combustion stove 2 of air preheater 10, for burning provides sufficient oxygen.In the said process, available backup dewatered sludge or other waste material burn in fluidized bed incinerator 2 earlier, produce high-temperature flue gas, and then start the sludge drying flow process, form recycling dynamic process system then; In the burning process, add auxiliary fuel 7 in fluidized bed incinerator 2, auxiliary fuel 7 is one or more in coal, oil, natural gas, living beings and the discarded object, makes burning more fully, thoroughly.
In the above-mentioned recycling dynamic process system running, fluidized bed incinerator 2 burns the flue gas that produces and enter flue 12 after separator 3 is isolated lime-ash, be provided with air preheater 10 and waste heat boiler 9 in the flue 12, part of smoke in the flue 12 is through air preheater 10 and waste heat boiler 9 back dischargings, another part flue gas enters spray dryer 1, lime-ash returns fluidized bed incinerator 2 through material returning device 4, fluidized bed incinerator 2 burns the slag that produces and discharges through scum pipe 11, slag can be used for brickmaking or is used as the overburden soil of refuse landfill, forms resource reutilization.Air preheater 10 is used to wind 8 and 6 preheatings of secondary wind, and 9 of waste heat boilers can be at the stove inner storing water, thereby provides hot water for the staff.
In the above-mentioned recycling dynamic process system running, the burning flow process of in the drying and other treatment flow process of in the spray dryer 1 mud 5 being carried out and the fluidized bed incinerator 2 dewatered sludge being carried out cooperatively interacts, the waste water of the former generation and the drainage pollution problem of foul smell had both been solved, the heat that has utilized the latter to produce again, a whole set of process system perfect adaptation, the disposable Treatment of Sludge problem that solved.
Claims (10)
1. an integrated sludge drying and incinerating treatment method employing is characterized in that: comprise the steps:
(1) handle primary sludge with dewaterer, the moisture content of handling back mud is 70～90%;
(2) be that 70～90% mud atomizes to described moisture content, adopt spray dryer to handle in the mud after the atomizing, obtain dewatered sludge; The tail gas that described spray dryer produces enters fluidized bed incinerator;
(3) described dewatered sludge enters described fluidized bed incinerator burning;
(4) described fluidized bed incinerator burns the flue gas that produces and enter flue after separator is isolated lime-ash, part of smoke discharging in the described flue, another part flue gas enters described spray dryer, described lime-ash returns described fluidized bed incinerator through material returning device, and described fluidized bed incinerator burns the slag that produces and discharges through scum pipe.
2. integrated sludge drying and incinerating treatment method employing according to claim 1 is characterized in that: in the described step (2), be that 70～90% mud atomizes and adopts high-pressure atomization or centrifugal atomizing to described moisture content.
3. integrated sludge drying and incinerating treatment method employing according to claim 1, it is characterized in that: in the described step (2), utilize and enter the flue gas of described spray dryer in the described flue of step (4) and contact with mud after the described atomizing, make the mud after the atomizing lose most of moisture content, obtain dewatered sludge.
4. according to claim 1 or 3 described integrated sludge drying and incinerating treatment method employings, it is characterized in that: in the described step (2), the moisture content of described dewatered sludge is 5～25%.
5. integrated sludge drying and incinerating treatment method employing according to claim 1, it is characterized in that: in the described step (3), the incineration temperature of described fluidized bed incinerator is 850～900 ℃.
6. integrated sludge drying and incinerating treatment method employing according to claim 1, it is characterized in that: in the described step (3), in the described burning process, add auxiliary fuel in described fluidized bed incinerator, described auxiliary fuel is one or more in coal, oil, natural gas, living beings and the discarded object.
7. integrated sludge drying and incinerating treatment method employing according to claim 1, it is characterized in that: in the described step (2), the part of the tail gas that described spray dryer produces enters the bottom of described fluidized bed incinerator as secondary wind, and another part enters the high-temperature region, top of described fluidized bed incinerator; In the described step (3), the bottom of described fluidized bed incinerator enters wind one time, and a described wind is air.
8. integrated sludge drying and incinerating treatment method employing according to claim 7 is characterized in that: in the described step (2), enter bottom and the bottom of described fluidized bed incinerator after a described wind and the preheating of described secondary wind process air preheater respectively.
9. integrated sludge drying and incinerating treatment method employing according to claim 1 is characterized in that: in the described step (4), discharge after discharged flue gas process waste heat boiler and the air preheater cooling in the described flue again.
10. integrated sludge drying and incinerating treatment method employing according to claim 1 is characterized in that: in the described step (4), described slag is used for brickmaking or as the overburden soil of refuse landfill.
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| CN2012100469299A CN103244957A (en) | 2012-02-28 | 2012-02-28 | Integral treatment method for drying and incinerating sludge |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103629659A (en) * | 2013-12-12 | 2014-03-12 | 碧海舟（北京）石油化工设备有限公司 | Process for producing heat by wastewater and biomass |
| CN104310746A (en) * | 2014-10-29 | 2015-01-28 | 天津市美好生活科技有限公司 | Method for drying and incinerating treatment of dewatered sludge |
| CN104324925A (en) * | 2014-09-09 | 2015-02-04 | 中国科学院南京土壤研究所 | Domestic garbage landfill final cover system |
| CN105318337A (en) * | 2015-10-20 | 2016-02-10 | 上海理工大学 | Coal-sludge co-combustion system based on high-temperature smoke drying and circulating fluidized bed boiler |
| CN105737165A (en) * | 2016-03-21 | 2016-07-06 | 安徽未名生物环保有限公司 | Material charging and discharging linkage method for garbage disposal |
| CN105757679A (en) * | 2016-03-21 | 2016-07-13 | 安徽未名生物环保有限公司 | Garbage treatment water circulation system |
| CN105757683A (en) * | 2016-03-21 | 2016-07-13 | 安徽未名生物环保有限公司 | Self-controlled water circulation method in garbage incineration process |
| CN105819526A (en) * | 2016-03-21 | 2016-08-03 | 安徽未名生物环保有限公司 | Intelligent garbage treatment system capable of achieving multiple water circulation |
| CN106115757A (en) * | 2016-06-24 | 2016-11-16 | 季栋梁 | Drilling sludge processing system and method |
| CN106322404A (en) * | 2016-09-05 | 2017-01-11 | 上海理工大学 | Sludge and coal fluidization-suspension coupled combustion system based on direct blowing type high-temperature flue gas drying |
| TWI593794B (en) * | 2014-09-19 | 2017-08-01 | Industrial sludge made of renewable building materials method | |
| CN107973567A (en) * | 2017-11-07 | 2018-05-01 | 常州禾吉纺织品有限公司 | A kind of discarded object base bubble composite soil and preparation method thereof |
| CN110220204A (en) * | 2019-05-17 | 2019-09-10 | 武汉深能环保新沟垃圾发电有限公司 | A kind of system and method for waste incineration cooperatively processing sludge |
| CN110723935A (en) * | 2019-11-29 | 2020-01-24 | 湖南安福环保科技股份有限公司 | Method for treating sludge in plastic particle production line |
| CN110902999A (en) * | 2019-12-05 | 2020-03-24 | 大连绿诺集团有限公司 | Municipal sludge dewatering, drying and burning treatment process without adding fuel |
| CN112125492A (en) * | 2020-10-26 | 2020-12-25 | 杭州富阳伟文环保科技有限公司 | Chemical sludge treatment method |
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| CN103629659A (en) * | 2013-12-12 | 2014-03-12 | 碧海舟（北京）石油化工设备有限公司 | Process for producing heat by wastewater and biomass |
| CN104324925A (en) * | 2014-09-09 | 2015-02-04 | 中国科学院南京土壤研究所 | Domestic garbage landfill final cover system |
| TWI593794B (en) * | 2014-09-19 | 2017-08-01 | Industrial sludge made of renewable building materials method | |
| CN104310746A (en) * | 2014-10-29 | 2015-01-28 | 天津市美好生活科技有限公司 | Method for drying and incinerating treatment of dewatered sludge |
| CN104310746B (en) * | 2014-10-29 | 2015-10-07 | 天津市美好生活科技有限公司 | The method of a kind of dewatered sludge drying and incineration process |
| CN105318337A (en) * | 2015-10-20 | 2016-02-10 | 上海理工大学 | Coal-sludge co-combustion system based on high-temperature smoke drying and circulating fluidized bed boiler |
| CN105757679B (en) * | 2016-03-21 | 2018-05-08 | 安徽未名生物环保有限公司 | A kind of garbage disposal water circulation system |
| CN105737165A (en) * | 2016-03-21 | 2016-07-06 | 安徽未名生物环保有限公司 | Material charging and discharging linkage method for garbage disposal |
| CN105819526A (en) * | 2016-03-21 | 2016-08-03 | 安徽未名生物环保有限公司 | Intelligent garbage treatment system capable of achieving multiple water circulation |
| CN105757683A (en) * | 2016-03-21 | 2016-07-13 | 安徽未名生物环保有限公司 | Self-controlled water circulation method in garbage incineration process |
| CN105757679A (en) * | 2016-03-21 | 2016-07-13 | 安徽未名生物环保有限公司 | Garbage treatment water circulation system |
| CN105819526B (en) * | 2016-03-21 | 2018-11-13 | 安徽未名生物环保有限公司 | A kind of intelligent garbage processing system of multiple water cycle |
| CN105757683B (en) * | 2016-03-21 | 2018-05-08 | 安徽未名生物环保有限公司 | A kind of Automatic-control water round-robin method in Refuse Incineration Process |
| CN106115757A (en) * | 2016-06-24 | 2016-11-16 | 季栋梁 | Drilling sludge processing system and method |
| CN106115757B (en) * | 2016-06-24 | 2017-11-10 | 季栋梁 | Drilling sludge processing system and method |
| CN106322404A (en) * | 2016-09-05 | 2017-01-11 | 上海理工大学 | Sludge and coal fluidization-suspension coupled combustion system based on direct blowing type high-temperature flue gas drying |
| CN107973567A (en) * | 2017-11-07 | 2018-05-01 | 常州禾吉纺织品有限公司 | A kind of discarded object base bubble composite soil and preparation method thereof |
| CN110220204A (en) * | 2019-05-17 | 2019-09-10 | 武汉深能环保新沟垃圾发电有限公司 | A kind of system and method for waste incineration cooperatively processing sludge |
| CN110723935A (en) * | 2019-11-29 | 2020-01-24 | 湖南安福环保科技股份有限公司 | Method for treating sludge in plastic particle production line |
| CN110723935B (en) * | 2019-11-29 | 2021-12-10 | 湖南安福环保科技股份有限公司 | Method for treating sludge in plastic particle production line |
| CN110902999A (en) * | 2019-12-05 | 2020-03-24 | 大连绿诺集团有限公司 | Municipal sludge dewatering, drying and burning treatment process without adding fuel |
| CN112125492A (en) * | 2020-10-26 | 2020-12-25 | 杭州富阳伟文环保科技有限公司 | Chemical sludge treatment method |
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Application publication date: 20130814 |