CN102285748A - Method and equipment for drying sludge by utilizing waste heat flue gas/solar energy - Google Patents
Method and equipment for drying sludge by utilizing waste heat flue gas/solar energy Download PDFInfo
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- CN102285748A CN102285748A CN2011101513379A CN201110151337A CN102285748A CN 102285748 A CN102285748 A CN 102285748A CN 2011101513379 A CN2011101513379 A CN 2011101513379A CN 201110151337 A CN201110151337 A CN 201110151337A CN 102285748 A CN102285748 A CN 102285748A
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Abstract
The invention discloses a method for drying sludge by utilizing waste heat flue gas/solar energy, and the method comprises: wet sludge is firstly mixed with additives, the mixed sludge is spread on a geothermal plate of a greenhouse with a sludge spreading device, wherein the geothermal plate is circularly heated by waste heat flue gas and heat-conducting oil among the geothermal plates and the greenhouse is heated by utilizing the solar energy, the gas in the greenhouse carries out the water and malodorous gas generated by evaporation during the sludge drying process through a fan, and the gas is returned to the greenhouse after dehumidifying and deodorizing. The invention also discloses equipment for realizing the method. The method and equipment disclosed by the invention solve the problems and shortcomings that cross contamination is caused by using waste heat flue gas to directly dry the sludge, the heat efficiency is lower in indirect drying of the sludge by using low-temperature waste flue gas, the solar sludge drying is greatly influenced by season and weather and thus the heat is instable, malodorous gas pollution is serious and the like. The method and equipment are especially suitable for sludge drying treatment with sludge burning and building material utilization as purposes, and can promote the industrialization progress of the sludge drying.
Description
Technical field
The present invention relates to a kind of treatment process of utilizing useless fume afterheat/sun power as the thermal source dewatered sludge, the invention still further relates to the equipment of this method of realization.
Background technology
Along with the popularizing of wastewater treatment in China facility, the raising of processing rate and the in-depth of degree of treatment, the contingency question that mud pollutes as sewage disposal progressively emerges.The high heating value that mud had is the most valuable part that mud is utilized as resource, if the calorific value of sludge of sewage treatment plant is utilized fully, can make mud when thoroughly being handled, and produces economic benefit.Yet the calorific value resource of mud can be utilized two primary conditions: the one, and the water ratio of mud must reduce as far as possible; The 2nd, the organic matter in the mud must be preserved.Mechanical dehydration can only be removed interstitial water and the sub-fraction capillary water in the mud, through behind the mechanical dehydration, still about 75%～80%, at this moment the calorific value of mud does not still have utility value to the water ratio of mud, because the moisture energy needed is greater than the energy of the calorific value output of mud own in the removal mud.Capillary water in the mud and planar water need external energy to remove by drying process, in order to guarantee that the organic matter in the mud suffers to destroy minimum, make most calorific values in the mud preserve really to become to have and utilize the resource that is worth, must carry out the sludge at low temperature mummification.
The prime cost of sludge drying is heat energy, its expense accounts for more than 80% of sludge treatment total expenses usually, the technology of traditional reduction moisture percentage in sewage sludge is to adopt mummification equipment that mud is carried out mummification thermal treatment under 200 ℃～700 ℃ high temperature, need to consume primary energy source such as coal, oil, Sweet natural gas, running cost is higher, and the key that reduces cost is whether can select and utilize appropriate thermal source.About 150 ℃, the heat that is taken up when flue gas leaves last heating surface causes heat loss due to exhaust gas because of not obtaining utilizing to discharged flue gas funnel temperatures such as garbage incinerating power plant, thermal power plant or cement mill always.Heat loss due to exhaust gas is generally 5%～12% of whole thermosteresis, and the difficulty that reduces heat loss due to exhaust gas is bigger, so this part heat of being thrown away by boiler is used once again, heats mud with it, the running cost of sludge treatment is reduced greatly, will be a wise move undoubtedly.Patent [CN100445224C] [CN100429166C] etc. has proposed to utilize coal-fired plant flue gas convection drying mud method, this method can effectively be utilized fume waste heat, but flue gas directly contacts with mud and makes flue gas and mud crossed contamination easily, produces the flue gas needs that contain a large amount of foul smell after the mummification and administers.
Contact drying technology is that thermal medium does not directly touch with mud mutually, but by heat exchanger with the wet mud of heat transferred, moisture in the mud is evaporated, compare with direct drying technique, it has the advantage of following several respects: (1) quality product is easy to guarantee.Because material does not directly contact with the mummification medium, has avoided the secondary pollution of mummification medium to mud.(2) the mummification thermal source is tending towards variation.(3) the low pollution.Contact drying has only a spot of waste gas to discharge, and is to the processing of control, purification and the stink of waste gas, not only simple but also expense is low.In sum, the indirect type mummification has excellent environmental-protecting performance, energy conservation characteristic, so low-temperature flue gas should be taked the indirectly drying mode as thermal source.Traditional contact drying equipment has multi-disc type moisture eliminator, hollow blade drying machine, disk dryer etc., but 200～700 ℃ of high-temperature operation patterns of the many employings of these moisture eliminators.At utilizing the low temperature flue gas (150～200 ℃) that gives up separately to have the lower problem of efficiency of thermal transfer in the sludge-drying process as thermal source.
The sun power sludge drying is handled a kind of novel method as sludge treatment technique, compares with traditional heat drying technology, has that the mummification temperature is low, working cost is cheap, an advantage such as simple to operate, environmentally safe, but its operation is limited.Solar radiation is subjected to the influence of season, weather and time bigger, the Various Seasonal in a year, and the different time on the same day, the radiation quantity of sun power is all different, has therefore also caused the instability of origin of heat in the drying process.
Summary of the invention
The present invention is the sludge at low temperature drying method of thermal source for the technical problem that exists in the solution known technology provides a kind of with useless fume afterheat/sun power, and this method can reduce mud energy consumption and running cost, raising drying sludge speed, eliminate the foul gas effect.The present invention also will provide a kind of equipment of realizing this method for this reason.
The technical scheme that the present invention takes for the technical problem that exists in the solution known technology is: the method for a kind of waste heat flue gas/solar energy desiccation mud, mud and additives mixed at first will wet, mixing back mud is tiled on the ground hot plate in greenhouse with shop mud device, described ground hot plate is the heating that circulates of the thermal oil between hot plate by waste heat flue gas and ground, described greenhouse adopts sun power to heat, gas is taken moisture and foul gas that the mud drying process evaporation produces out of by blower fan in the greenhouse, and gas turns back in the greenhouse after the dehumidifying deodorizing again.
Described additive is any one in flyash, sludge incineration ash, coal dust, colliery powder, sawdust and the stalk powder, and the mass ratio of described additive and mud is 0～1: 10.
In order to realize above-mentioned sludge drying processing method, the technical solution used in the present invention is: the equipment of a kind of waste heat flue gas/solar energy desiccation mud method, comprise the ground hot plate, be installed in the shop mud device on the described ground hot plate and turn over the mud device, be cemented in the heat-conducting oil pipes on the described ground hot plate, described heat-conducting oil pipes is connected with the flue gas heat exchange device, be cemented in and be provided with in the solar house on the described ground hot plate, the described solar house that heat storage, described solar house are consolidated with the recirculating air pipeline, described recirculating air pipeline is provided with the dehumidifying odor removal.
Advantage of the present invention and positively effect are: utilize fume waste heat and the sun power associating thermal source as mud, can under the situation that does not consume new forms of energy, moisture percentage in sewage sludge significantly be reduced, can reduce power plant's thermal pollution, can reduce the sludge drying cost again, realize the low consumption dewatered sludge; Waste heat flue gas can not influence the normal operation of power plant's generating, and give thermal oil by the recuperator indirect heat exchange from power plant's flue intercepting, has effectively avoided the crossed contamination of flue gas and mud; Utilize clean energy sun power to assist dewatered sludge, sun power/geothermal hothouse has Greenhouse effect preferably under the radiation of the sun, and room temp comparatively fast improves, and has accelerated Sludge Surface moisture evaporation speed; High-efficiency large capacity heat storage in the greenhouse can be stored a large amount of heats by competent illumination and ground thermal radiation, can keep the relatively-high temperature in the greenhouse; In the greenhouse system, added and ventilated and the dehumidifying odor removal, effectively avoided air water capacity in the rate greenhouse to reach capacity and the shedding of foul gas; In sun power/geothermal hothouse mud is reduced to about 35% from water ratio about 80%, the mud that mummification obtains under the cold condition has kept original calorific value.Be particularly suitable for being utilized as the sludge drying processing of purpose with sludge incineration, building materials; The present invention can promote the industrialization process of sludge drying.
Description of drawings
Fig. 1 is waste heat flue gas of the present invention/solar energy desiccation mud process flow sheet;
Fig. 2 is a solar greenhouse structure synoptic diagram of the present invention;
Concrete implementing measure (in conjunction with the accompanying drawings, detailed explanation being done in concrete technical process)
For further understanding summary of the invention of the present invention, characteristics and effect, enumerate following examples now, and conjunction with figs. is described in detail as follows:
Embodiment is to be coal-burning power plant's waste heat flue gas of 150 ℃ with temperature, deliver to recuperator through the fly-ash separator rear pass, the heating thermal oil, the auxiliary simultaneously sun power/geothermal hothouse that utilizes sun power to make up single sloping top formula is united with the form in the greenhouse of band ground hot plate face and to be utilized power-plant flue gas waste heat/sun power to realize sludge drying.
The equipment of realizing aforesaid method comprises shop mud device 1, ground hot plate 2, turn over mud device 3, solar house 4, heat-conducting oil pipes 5, heat storage 6, dehumidifying odor removal 7, recirculation blower 8, wet mud is paved on ground hot plate 2 by described shop mud device 1, described shop mud device 1 and turn over the top that mud device 3 is arranged on described ground hot plate 2, described ground hot plate 2 is connected with heat-conducting oil pipes 5, heat-conducting oil pipes 5 is by recuperator and flue gas heat exchange, described ground hot plate 2 is housed in described solar house 4 inside, described solar house 4 connects recirculation blower 8, described recirculation blower 8 is connected with dehumidifying odor removal 7 by pipeline, is provided with heat storage 6 in the described solar house 4.
Certain sewage plant sludge initial aqueous rate 80%, following table is implemented the data of several groups of embodiment of sludge drying processing method for adopting above-mentioned steps:
What the foregoing description was set forth is sludge of sewage treatment plant mummification novel process, and the present invention is not limited to sludge of sewage treatment plant, also is applicable to pollution of river bed mud, municipal sludge etc.Waste heat flue gas is not limited to the coal-burning power plant, also is applicable to the useless flue gas of Industrial Stoves such as garbage incinerating power plant, heating boiler, cement kiln.
Although in conjunction with the accompanying drawings the preferred embodiments of the present invention are described above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not breaking away under the scope situation that aim of the present invention and claim protect, can also make a lot of forms, these all belong within protection scope of the present invention.
Claims (3)
1. waste heat flue gas/solar energy desiccation mud method, mud and additives mixed at first will wet, mixing back mud is tiled on the ground hot plate in greenhouse with shop mud device, described ground hot plate is the heating that circulates of the thermal oil between hot plate by waste heat flue gas and ground, described greenhouse adopts sun power to heat, gas is taken moisture and foul gas that the mud drying process evaporation produces out of by blower fan in the greenhouse, and gas turns back in the greenhouse after the dehumidifying deodorizing again.
2. waste heat flue gas according to claim 1/solar energy desiccation mud method, it is characterized in that, described additive is any one in flyash, sludge incineration ash, coal dust, colliery powder, sawdust and the stalk powder, and the mass ratio of described additive and mud is 0～1: 10.
3. equipment of realizing the described waste heat flue gas of claim 1/solar energy desiccation mud method, it is characterized in that, comprise the ground hot plate, be installed in the shop mud device on the described ground hot plate and turn over the mud device, be cemented in the heat-conducting oil pipes under the described ground hot plate, described heat-conducting oil pipes is connected with the flue gas heat exchange device, be cemented in and be provided with in the solar house on the described ground hot plate, the described solar house that heat storage, described solar house are consolidated with the recirculating air pipeline, described recirculating air pipeline is provided with the dehumidifying odor removal.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103253845A (en) * | 2013-05-03 | 2013-08-21 | 湖州宜可欧环保科技有限公司 | Different poly energy sludge drying system |
| CN103395962A (en) * | 2013-08-14 | 2013-11-20 | 江苏安士德环境科技有限公司 | Sludge drying process |
| CN103742919A (en) * | 2013-12-26 | 2014-04-23 | 杨海基 | Solar garbage incinerator system |
| CN103992019A (en) * | 2014-06-04 | 2014-08-20 | 宋雷震 | System for drying sludge by virtue of diversified heat energy |
| CN104045217A (en) * | 2014-05-22 | 2014-09-17 | 广东电网公司电力科学研究院 | Municipal sludge drying system utilizing power plant waste heat coupling solar energy |
| CN104654740A (en) * | 2015-01-27 | 2015-05-27 | 中国能源建设集团江苏省电力设计院有限公司 | Coal slime drying system and method using electric power plant low-grade steam and solar energy |
| CN105084712A (en) * | 2015-07-30 | 2015-11-25 | 天津城建大学 | Device utilizing exhaust gas waste heat and solar energy to dry sludge |
| CN105314814A (en) * | 2015-11-26 | 2016-02-10 | 佛山高富中石油燃料沥青有限责任公司 | Asphalt sludge drying device |
| CN105330119A (en) * | 2015-10-30 | 2016-02-17 | 中国科学院广州能源研究所 | Method and system for drying sludge by means of solar energy and flue gas waste heat |
| CN105481224A (en) * | 2016-01-21 | 2016-04-13 | 盐城琛丹低碳技术研究院有限公司 | Air source sludge drying method |
| CN106517718A (en) * | 2015-09-09 | 2017-03-22 | 江苏清泉环保设备有限公司 | Energy-saving resourceful treatment technology for drilling mud |
| CN107954585A (en) * | 2017-11-27 | 2018-04-24 | 江苏理工学院 | A kind of domestic sludge assists coal desiccation molding machine |
| CN109796118A (en) * | 2019-02-01 | 2019-05-24 | 九洲环境科技(天津)有限公司 | A kind of band has surplus heat the sludge Equipment for Heating Processing and method of recycling |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103253845B (en) * | 2013-05-03 | 2014-02-12 | 湖州宜可欧环保科技有限公司 | Different poly energy sludge drying system |
| CN103253845A (en) * | 2013-05-03 | 2013-08-21 | 湖州宜可欧环保科技有限公司 | Different poly energy sludge drying system |
| CN103395962A (en) * | 2013-08-14 | 2013-11-20 | 江苏安士德环境科技有限公司 | Sludge drying process |
| CN103742919B (en) * | 2013-12-26 | 2017-01-25 | 杨海基 | Solar garbage incinerator system |
| CN103742919A (en) * | 2013-12-26 | 2014-04-23 | 杨海基 | Solar garbage incinerator system |
| CN104045217A (en) * | 2014-05-22 | 2014-09-17 | 广东电网公司电力科学研究院 | Municipal sludge drying system utilizing power plant waste heat coupling solar energy |
| CN103992019A (en) * | 2014-06-04 | 2014-08-20 | 宋雷震 | System for drying sludge by virtue of diversified heat energy |
| CN103992019B (en) * | 2014-06-04 | 2015-09-16 | 宋雷震 | A kind of system utilizing diversification heat energy sludge-drying |
| CN104654740A (en) * | 2015-01-27 | 2015-05-27 | 中国能源建设集团江苏省电力设计院有限公司 | Coal slime drying system and method using electric power plant low-grade steam and solar energy |
| CN105084712A (en) * | 2015-07-30 | 2015-11-25 | 天津城建大学 | Device utilizing exhaust gas waste heat and solar energy to dry sludge |
| CN106517718A (en) * | 2015-09-09 | 2017-03-22 | 江苏清泉环保设备有限公司 | Energy-saving resourceful treatment technology for drilling mud |
| CN105330119A (en) * | 2015-10-30 | 2016-02-17 | 中国科学院广州能源研究所 | Method and system for drying sludge by means of solar energy and flue gas waste heat |
| CN105314814A (en) * | 2015-11-26 | 2016-02-10 | 佛山高富中石油燃料沥青有限责任公司 | Asphalt sludge drying device |
| CN105481224A (en) * | 2016-01-21 | 2016-04-13 | 盐城琛丹低碳技术研究院有限公司 | Air source sludge drying method |
| CN107954585A (en) * | 2017-11-27 | 2018-04-24 | 江苏理工学院 | A kind of domestic sludge assists coal desiccation molding machine |
| CN109796118A (en) * | 2019-02-01 | 2019-05-24 | 九洲环境科技(天津)有限公司 | A kind of band has surplus heat the sludge Equipment for Heating Processing and method of recycling |
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Application publication date: 20111221 |