CN1272574C - Method for disposing urban sludge through combustion - Google Patents
Method for disposing urban sludge through combustion Download PDFInfo
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- CN1272574C CN1272574C CN 200410075507 CN200410075507A CN1272574C CN 1272574 C CN1272574 C CN 1272574C CN 200410075507 CN200410075507 CN 200410075507 CN 200410075507 A CN200410075507 A CN 200410075507A CN 1272574 C CN1272574 C CN 1272574C
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Abstract
The present invention discloses a method for disposing urban sludge by combustion, whose aim is to overcome the defects of low combustion rate, inability to dispose the urban sludge well, much consumed energy and long disposing time of the existing combustion method for disposing the urban sludge. Ignition fuel is pressurized and fed into a furnace chamber by a pump, and the ignition fuel which presents a spray pattern is ignited; liquid fuel is prepared from the urban sludge and finished coal water slurry by agitating and mixing according to a certain proportion; the liquid fuel is pressurized by a slurry pump and shot into the furnace chamber after passing a burner; compressed air is delivered to a nozzle, the liquid fuel is ignited by the ignition fuel to make the liquid fuel atomized and suspended, and the urban sludge is disposed. The urban sludge disposal by the technological method needs no processes of dewatering and drying, and wastes no energy sources. The atomized and suspended liquid fuel can be sufficiently and rapidly burnt, and the residue of the liquid fuel which can serve as building material is less, so the urban sludge can be disposed thoroughly, heat in the urban sludge is recovered, waste is changed into resources, and a maximum amount of the urban sludge is disposed by a minimum amount of the finished coal water slurry.
Description
Technical field
The invention belongs to the processing method of municipal sludge, specifically a kind of method of municipal sludge being sent into the burner internal combustion of installing on the boiler.
Background technology
Rapid economy development has driven quickening of urbanization process, the sewage load in city is increasing year by year simultaneously, the amount of sludge that produces after the sewage disposal also increases thereupon, be example only with small and medium-sized cities, the activated sludge of sewage treatment plant's generation reaches more than 100 tons every day, and this quantity has been brought serious pollution also in continuous growth to The Surroundings in Cities, also become a big obstacle of urban construction, the mud of water treatment has become one of bottleneck of urban development.According to survey, the calorific value of the mud after the municipal sewage treatment reaches about 3550kj/kg, can handle mud with the method reduced volume of burning fully, reclaims the heat in the mud simultaneously.
Existing minority is to the burning disposal of municipal sludge, mostly be earlier wherein most moisture content is collected and removed to mud, drying is handled the sludge bulking that forms solid, add a large amount of combustibles again and burn in plain cylindrical furnace, the method for its burning adopts conventional burning methods such as grate firing method and fluidized bed combustion method more.With above-mentioned incinerating method burning and processing sludge, the shortcoming of its incinerating method is as follows:
The one, with grate firing method and the low municipal sludge of fluidized bed combustion method incinerating combustion value, because sludge bulking can not fully contact with air, mud can not fully burn, and its burnout rate is only about 70%, because of the low callable heat of burnout rate just lacks; Simultaneously because burnout rate is low, the amount of day handling municipal sludge is little, and the stove internal combustion not level of residue of cinder is still very big, can not fundamentally solve the pollution of environment and the obstacle that urban construction is formed; Moreover will increase the input amount of combustible for the burnout rate that improves mud, a large amount of burnings of combustible can improve fire box temperature, and when more than the fire box temperature height to 1100 ℃, the content of ashes of mud is big, because of the low meeting of ash fusion point serious coking in stove, make the burning of mud more insufficient; And high furnace temperature also can produce a large amount of NO, NO
2Etc. multiple nitrogen oxide pernicious gas, make mud when failing better to solve ground pollution, add heavily contaminated to air again.
The 2nd, with the mud of grate firing method and the burning of fluidized bed combustion method, need earlier sludge dewatering, make it be no more than 20% at the moisture content of going into the stokehold, otherwise just can not burn or burnout rate lower, therefore the complex process that municipal sludge is handled in earlier stage, need to increase dehydration and wait equipment, also will consume lot of energy and dewatering time, prolonged the processing cycle municipal sludge.
Summary of the invention
Technical problem to be solved by this invention is, overcome prior art low with grate firing method and fluidized bed combustion method burning disposal municipal sludge burnout rate, can not handle municipal sludge and power consumption is high, the processing time is long shortcoming preferably, a kind of burning facture of new municipal sludge is provided.
In order to solve the problems referred to above that prior art exists, technical scheme of the present invention is:
With pump the igniter fuel force feed is spray pattern to burner hearth, open a wind switch of burner, open secondary wind switch simultaneously, the damper aperture is to 85-90%, light igniter fuel after making air enter the nozzle place of burner, make fire box temperature rise to 650-700 ℃;
With the finished product water-coal-slurry of the municipal sludge of moisture 70-85% and moisture 30-40% with 2: the volume ratio of 3-3.5 mixes into liquid fuel, be forced into 0.6-0.65Mpa with stock pump and send into nozzle, the nozzle exit that pressure is delivered to the burner hearth inner burner at the compressed air of 0.6-0.7Mpa is injected burner hearth simultaneously, makes it be the atomizing suspended state;
Close the wind switch one time, strengthen the throttle opening 10% of regulating secondary wind, selecting wind speed for use is 20-25m/s, regulates secondary wind simultaneously, makes its swirl strength be controlled at 1-2.5.
In order to improve the burnout rate of municipal sludge, make mixed fuel firing more abundant, the bicker degree that revolves that is installed in the water coal slurry burner exit on the hole, furnace wall is set at the 11-12.5 degree.
Advantage of the present invention and good effect are: because municipal sludge is the residue after the sewage disposal, wherein contain multiple combustible component, moisture content after the processing is generally about 80%, therefore do not need to dehydrate processing, do not want dehydration equipment, do not waste energy, do not increase the processing time, can be directly with itself and water-coal-slurry mixed combustion;
Mixed fluid fuel is burnt with said method, liquid fuel is pumped up deliver to the nozzle place of the burner gun on the coal water slurry boiler because be, liquid fuel is burnt under the atomizing suspended state, pass through again one, the air quantity of secondary wind, blast is regulated, make the mixed fluid fuel that contains larger proportion mud be issued to abundant burning at the state and the environment that are fit to burning, therefore handle municipal sludge time weak point, the amount of its residue of burning back is little, and residue has all become basically can do the tiny ashes that construction material is used, thereby can thoroughly handle municipal sludge clean; Suitable blast, wind speed, swirl strength and revolve the bicker degree make the sludge liquid fluid fuel burnout rate that contains that is the atomizing suspension can be up to 98%, can be with the heat recovery and utilization in the municipal sludge, turn waste into wealth;
Process is set the adjustment of blast, eddy flow angle and the intensity of secondary wind, make the temperature control of water coal slurry burner torch root cigarette more than 700 ℃, flame flame core temperature is no more than 1100 ℃, and the ash content under above-mentioned ignition temperature in the fuel is difficult for coking, the NO that is produced, NO
2Few Deng pernicious gas, therefore also less relatively to the pollution of air.
Adopt above-mentioned process to handle municipal sludge in a word, can significantly reduce the harm of municipal sludge to the city, the abundant burning of combustible produces a large amount of heat in the mud simultaneously, can alleviate energy-intensive contradiction.After tested, the existing finished product water-coal-slurry of the mixed fluid fuel instead of part of above-mentioned municipal sludge and water-coal-slurry is supplied with the dedicated water fluid-fired boiler and is made fuel, can economize on coal 20%, and can dispose the municipal sludge of maximum with minimum finished product water-coal-slurry.With existing 20 tons/time water-coal-slurry boiler dedicated be example, every day is handled 100 tons of municipal sludges, the municipal sludge that sewage treatment plant produces as long as one 20 tons/time boiler can digest, day save 80 tons of finished product water-coal-slurry, its economic benefit and social benefit are all considerable.
Description of drawings
Fig. 1 is a process chart of the present invention;
Fig. 2 uses the front view that is installed in the water coal slurry burner on the furnace wall for the present invention;
Fig. 3 is the schematic top plan view of Fig. 2.
The specific embodiment
The invention will be further described below in conjunction with drawings and Examples.
Embodiment 1:(is referring to Fig. 1, Fig. 2, Fig. 3)
With pump with igniter fuel by the ignition channel 7.2 on the burner 4, force feed is spray pattern to burner hearth 8, open the primary and secondary air switch 9,10 of burner 4, primary and secondary air is rotated through wind wheel 2,3 respectively to be sent into, air is lighted igniter fuel enter nozzle 7.1 places of burner 4 spray guns 7 by primary and secondary air air channel 5,4.1 after, makes fire box temperature rise to 650 ℃.Igniter fuel can be to be easy to light and safe in utilization as (following all identical) such as diesel oil or combustion gas;
Again the finished product water-coal-slurry of the municipal sludge of moisture 70-85% and moisture 30-40% is mixed into liquid fuel with 2: 3.5 volume ratio, be forced into the spray gun 7 that 0.6Mpa sends into burner 4 centers with stock pump, simultaneously the compressed air of 0.6Mpa is delivered to spray gun 7 on the burner 4, inject in the burner hearth 8 by nozzle 7.1, make liquid fuel be the atomizing suspended state;
In order to improve the burnout rate of municipal sludge, make the mixed fluid fuel burning more abundant, mouthful angle [alpha] of revolving that is installed in the water coal slurry burner 4 on 1 hole, furnace wall can be set at 11 ° (referring to Fig. 2).
For the mixed fluid fuel that enters burner 4 is not stopped up, filter (referring to Fig. 1, following examples together) was installed before burner 4 by burner 4 time.
Embodiment 2:
With pump with igniter fuel by the ignition channel 7.2 on the burner 4, force feed is spray pattern to burner hearth 8, open the primary and secondary air switch 9,10 of burner 4, primary and secondary air is rotated through wind wheel 2,3 respectively to be sent into, air is lighted igniter fuel enter nozzle 7.1 places of burner 4 spray guns 7 by primary and secondary air air channel 5,4.1 after, makes fire box temperature rise to 700 ℃;
Again the finished product water-coal-slurry of the municipal sludge of moisture 70-85% and moisture 30-40% is mixed into liquid fuel with 2: 3 volume ratio, be forced into the spray gun 7 that 0.65Mpa sends into burner 4 centers with stock pump, simultaneously the compressed air of 0.7Mpa is delivered to spray gun 7 on the burner 4, inject in the burner hearth 8 by nozzle 7.1, make liquid fuel be the atomizing suspended state;
Close wind switch 9 one time, regulate secondary wind switch 10 and make its throttle opening strengthen 10%, selecting wind speed for use is 25m/s, makes its swirl strength be controlled at 2.5 by adjusting handle 6 simultaneously, and the composite liquid fuel of municipal sludge and water-coal-slurry can fully be burnt.
Mouthful angle [alpha] of revolving that is installed in the water coal slurry burner 4 on 1 hole, furnace wall is set at 12 °.
Embodiment 3:
With pump with igniter fuel by the ignition channel 7.2 on the burner 4, force feed is spray pattern to burner hearth 8, open the primary and secondary air switch 9,10 of burner 4, primary and secondary air is rotated through wind wheel 2,3 respectively to be sent into, air is lighted igniter fuel enter nozzle 7.1 places of burner 4 spray guns 7 by primary and secondary air air channel 5,4.1 after, makes fire box temperature rise to 700 ℃;
Again the finished product water-coal-slurry of the municipal sludge of moisture 70-85% and moisture 30-40% is mixed into liquid fuel with 2: 3.5 volume ratio, be forced into the spray gun 7 that 0.6Mpa sends into burner 4 centers with stock pump, simultaneously the compressed air of 0.6Mpa is delivered to the spray gun 7 on the burner 4, inject in the burner hearth 8 by nozzle 7.1, make liquid fuel be the atomizing suspended state;
Mouthful angle [alpha] of revolving that is installed in the water coal slurry burner 4 on 1 hole, furnace wall is set at 12.5 °.
Claims (8)
1, a kind of burning facture of municipal sludge is characterized in that:
With pump the igniter fuel force feed is spray pattern to burner hearth, open a wind switch of burner, open secondary wind switch simultaneously, the damper aperture is to 85-90%, light igniter fuel after making air enter the nozzle place of burner, make fire box temperature rise to 650-700 ℃;
With the finished product water-coal-slurry of the municipal sludge of moisture 70-85% and moisture 30-40% with 2: the volume ratio of 3-3.5 mixes into liquid fuel, be forced into 0.6-0.65Mpa with stock pump and send into nozzle, simultaneously pressure is delivered to the nozzle exit of burner hearth inner burner at the compressed air of 0.6-0.7Mpa, inject burner hearth and make it be the atomizing suspended state;
Close the wind switch one time, the air door of regulating secondary wind strengthens aperture 10%, and selecting wind speed for use is 20-25m/s, regulates secondary wind simultaneously, makes its swirl strength be controlled at 1-2.5.
2, the burning facture of municipal sludge as claimed in claim 1 is characterized in that:
With pump the igniter fuel force feed is spray pattern to burner hearth, opens a wind switch of burner, open secondary wind switch simultaneously, damper aperture to 90% is lighted igniter fuel after making air enter the nozzle place of burner, makes fire box temperature rise to 650 ℃;
The finished product water-coal-slurry of the municipal sludge of moisture 70-85% and moisture 30-40% is mixed into liquid fuel with 2: 3.5 volume ratio, be forced into 0.6Mpa with stock pump and send into spray gun, simultaneously pressure is delivered to the nozzle exit of burner hearth inner burner at the compressed air of 0.6Mpa, inject burner hearth and make it be the atomizing suspended state;
Close the wind switch one time, the air door of regulating secondary wind strengthens aperture 10%, and selecting wind speed for use is 20m/s, regulates secondary wind simultaneously, makes its swirl strength be controlled at 1.
3, the burning facture of municipal sludge as claimed in claim 1 is characterized in that:
With pump the igniter fuel force feed is spray pattern to burner hearth, opens a wind switch of burner, open secondary wind switch simultaneously, damper aperture to 90% is lighted igniter fuel after making air enter the nozzle place of burner, makes fire box temperature rise to 700 ℃;
The finished product water-coal-slurry of the municipal sludge of moisture 70-85% and moisture 30-40% is mixed into liquid fuel with 2: 3 volume ratio, be forced into 0.65Mpa with stock pump and send into spray gun, simultaneously pressure is delivered to the nozzle exit of burner hearth inner burner at the compressed air of 0.7Mpa, inject burner hearth and make it be the atomizing suspended state;
Close the wind switch one time, the air door of regulating secondary wind strengthens aperture 10%, and selecting wind speed for use is 25m/s, regulates secondary wind simultaneously, makes its swirl strength be controlled at 2.5.
4, the burning facture of municipal sludge as claimed in claim 1 is characterized in that:
With pump the igniter fuel force feed is spray pattern to burner hearth, opens a wind switch of burner, open secondary wind switch simultaneously, damper aperture to 85% is lighted igniter fuel after making air enter the nozzle place of burner, makes fire box temperature rise to 700 ℃;
The finished product water-coal-slurry of the municipal sludge of moisture 70-85% and moisture 30-40% is mixed into liquid fuel with 2: 3.5 volume ratio, be forced into 0.6Mpa with stock pump and send into spray gun, simultaneously pressure is delivered to the nozzle exit of burner hearth inner burner at the compressed air of 0.6Mpa, inject burner hearth and make it be the atomizing suspended state;
Close the wind switch one time, the air door of regulating secondary wind strengthens aperture 10%, and selecting wind speed for use is 23m/s, regulates secondary wind simultaneously, makes its swirl strength be controlled at 2.
5, as the burning facture of claim 1 or 2 or 3 or 4 described municipal sludges, it is characterized in that: the bicker degree that revolves of water coal slurry burner is the 11-12.5 degree.
6, the burning facture of municipal sludge as claimed in claim 5 is characterized in that: the bicker degree that revolves of water coal slurry burner is 11 degree.
7, the burning facture of municipal sludge as claimed in claim 5 is characterized in that: the bicker degree that revolves of water coal slurry burner is 12 degree.
8, the burning facture of municipal sludge as claimed in claim 5 is characterized in that: mouthful angle [alpha] of revolving of water coal slurry burner is 12.5 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410075507 CN1272574C (en) | 2004-12-10 | 2004-12-10 | Method for disposing urban sludge through combustion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410075507 CN1272574C (en) | 2004-12-10 | 2004-12-10 | Method for disposing urban sludge through combustion |
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| CN1632377A CN1632377A (en) | 2005-06-29 |
| CN1272574C true CN1272574C (en) | 2006-08-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200410075507 Expired - Fee Related CN1272574C (en) | 2004-12-10 | 2004-12-10 | Method for disposing urban sludge through combustion |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101358137B (en) * | 2008-09-28 | 2012-07-18 | 广州恒雅环保科技有限公司 | Sludge liquid fuel and preparation method thereof |
| CN101694299A (en) * | 2009-10-21 | 2010-04-14 | 吴跃平 | Method for eliminating sludge through combustion |
| CN102168855A (en) * | 2011-04-27 | 2011-08-31 | 浙江物华天宝能源环保有限公司 | Pneumatic sludge feeding device of sludge incinerator |
| CN103375806B (en) * | 2012-04-26 | 2015-10-14 | 月岛机械株式会社 | The treated object transport method of pressurized flow furnace system |
| CN102927559B (en) * | 2012-11-15 | 2016-04-27 | 广西梧州日成林产化工股份有限公司 | Combustion system for coal-water slurry boiler |
| CN104566401B (en) * | 2014-12-31 | 2017-08-11 | 华中科技大学 | The combustion method of oxygenation containing wet mud and device |
| CN110702840B (en) * | 2019-10-14 | 2022-06-07 | 河北地质大学华信学院 | Analysis device based on energy utilization rate of carbonized urban domestic sewage biomass |
| CN111892264A (en) * | 2020-08-24 | 2020-11-06 | 武汉永清环保科技工程有限公司 | Sludge co-combustion treatment device and treatment method without secondary exposure |
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2004
- 2004-12-10 CN CN 200410075507 patent/CN1272574C/en not_active Expired - Fee Related
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Owner name: QINGDAO HAIZHONG BOILER CO., LTD. Free format text: FORMER OWNER: JIANG GUILI Effective date: 20081017 |
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Owner name: QINGDAO HAIZHONG ENVIRONMENT PROTECTION BOILER CO. Free format text: FORMER OWNER: QINGDAO HAIZHONG BOILER CO., LTD. Effective date: 20091120 |
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