CN102515462A - Energy-saving system applied to sludge treatment and disposal - Google Patents
Energy-saving system applied to sludge treatment and disposal Download PDFInfo
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- CN102515462A CN102515462A CN2012100066654A CN201210006665A CN102515462A CN 102515462 A CN102515462 A CN 102515462A CN 2012100066654 A CN2012100066654 A CN 2012100066654A CN 201210006665 A CN201210006665 A CN 201210006665A CN 102515462 A CN102515462 A CN 102515462A
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- heat
- sludge
- waste
- lithium bromide
- energy
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
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- Drying Of Solid Materials (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to the field of energy-saving environment protection, in particular to an energy-saving system applied to sludge treatment and disposal. According to the invention, aiming at solving problems of large waste water discharge, large heat waste, lower system integral heat utilization efficiency and the like in the traditional sludge heat drying waste vapor treatment system, low temperature waste heat in a waste condensed fluid is recycled by using a lithium bromide absorbing type heat pump unit, medium temperature heat source which can be used by sludge digestion tank is output, and the heating vapor or heat conducting oil of a sludge heat drying machine is used as a driving heat source of the lithium bromide absorbing type heat pump unit; meanwhile, a circulating cooling water pump is arranged to reduce the waste water discharge. According to the invention, in the whole sludge heat drying treatment process, a large quantity of low temperature heat discharged with the waste condensed fluid are recycled by using a small quantity of high temperature heat sources so that the waste heat utilization efficiency of the system is increased and the energy consumption and waste water discharge in the whole sludge treatment and disposal process are reduced; therefore, the whole operation cost is saved.
Description
Technical field
The present invention relates to the energy-conserving and environment-protective field, relate in particular to a kind of energy conserving system that is applied to mud heat drying treatment and disposal.
Background technology
According to " the urban wastewater treatment firm sludge treatment is disposed prevention and cure of pollution best practicable technology guides (trying) ", " urban wastewater treatment firm reducing sludge volume, decrement, stable and innoxious process are called sludge treatment " is like anaerobic sludge digestion." mud after treatment or sludge product are in environment or utilize and reach steady in a long-term in the process; and the finally mode of dissolving that HUMAN HEALTH and ecotope do not produce harmful effect is called sludge disposal ", like sludge incineration, the utilization of mud soil, sanitary landfill, comprehensive utilization etc.China's sludge calorific value is lower at present, the sludge disposal mode is various, and sludge drying is an important step before present mud carries out ultimate disposal or ultimate disposal.Sludge drying has multiple mode; Heat drying is wherein a kind of most widely used mode efficiently indirectly, like thin layer desiccation machine, disc type desiccation machine, oar blade type desiccation machine etc., adopts high temperature and high pressure steam or thermal oil as heating medium; Heating mud makes wherein moisture evaporation; To improve its solid content, increase its calorific value, so that store or carry out resource utilization and utilize again.
Fig. 1 has shown traditional heat drying exhaust steam treatment system flow process.From the waste hot steam of mud heat drying machine in the direct contact type condensing surface; The water condensation that is cooled, non-condensable gas are extracted out by the flow process blower fan and are got into deodoration system, the condensation waste liquid through direct contact type Water in Condenser seal apparatus by blowdown to sewage work; Used heat in the condensation waste liquid also is pulled away with the discharging of condensation waste liquid thereupon; Because the discharging of waste liquid amount is bigger, and has caused the waste of heat, the entire system efficiency of utilization is lower.
Summary of the invention
The objective of the invention is to: in whole sludge treatment disposal process; The recycling heat that waste liquid is taken away that is condensed improves the used heat utilising efficiency of system, reduces the energy consumption in the whole sludge treatment disposal process; Reduce wastewater discharge simultaneously, save the overall operation cost.
Be to realize that above-mentioned purpose, the present invention adopt the lithium bromide absorption type heat pump unit to reclaim the low-temperature waste heat in the condensation waste liquid, output can supply that sludge digestion tank uses in warm source.Specifically, that is: the recirculated cooling water pump is set, to reduce wastewater discharge; Lithium bromide absorption type heat pump is set, reclaims the used heat in the recirculated cooling water, reduce the return water temperature of recirculated cooling water, supply high-quality hot water to sludge digestion tank simultaneously; The heating steam of employing mud heat drying machine or thermal oil are as the driving heat source of lithium bromide absorption type heat pump; Water seal arrangement bottom installing variable valve at the direct contact type condensing surface; Regular discharge unit condensation waste liquid; And replenish fresh water coolant at the top of direct contact type condensing surface; To regulate the water quality of recirculated cooling water, so when reducing wastewater discharge, need not to improve the equipment material of whole condenser system.
System flow of the present invention is as shown in Figure 2:
From the waste hot steam temperature of mud heat drying machine about 95 ℃ ~ 100 ℃, under the flow process fan action, get into the direct contact type condensing surface, non-condensable gas is also extracted out through the flow process blower fan and is got into deodoration system.Water coolant in the direct contact type condensing surface adopts recirculated cooling water, and the recirculated cooling water pump is set, about 40 ℃ of the leaving water temperature(LWT) of recirculated cooling water, and the return water temperature of water coolant is designed to 20 ℃.On recirculated cooling water pump outlet pipeline, the lithium bromide absorption type heat pump unit is set; Reclaim the heat in the recirculated cooling water; And the temperature of recirculated cooling water is reduced to 20 ℃ of design temperatures, the circulation of sludge digestion tank simultaneously adds hot water gets into the lithium bromide absorption type heat pump unit behind sludge digestion tank about 50 ℃ ~ 65 ℃ of temperature, behind lithium bromide absorption type heat pump; Recirculated water is heated to 75 ℃ ~ 90 ℃, gets into sludge digestion tank again and supplies sludge digestion to use.
The lithium bromide absorption type heat pump unit needs high temperature heat source to drive, and the heating steam of patent utilization mud heat drying machine of the present invention or thermal oil with a spot of high temperature heat source, absorb low-temperature heat source as driving heat source, output more can effectively utilize in warm source.
Install variable valve in the water seal arrangement bottom of direct contact type condensing surface simultaneously, regular discharge unit condensation waste liquid, the exhaust temperature of condensation waste liquid is not higher than 40 ℃, and replenishes fresh water coolant in condenser overhead, to regulate the water quality of recirculated cooling water.
Compare with traditional process system, the advantage of patent of the present invention is:
1) utilize the lithium bromide absorption type heat pump unit,, reclaim a large amount of low-temperature waste heat in the heat drying exhaust steam with a spot of high temperature heat source, output more can effectively utilize in warm source, improved the used heat utilization ratio of sludge drying system greatly;
2) warm source is used for sludge digestion tank in will reclaiming, and greatly reduces the energy consumption of whole sludge treatment disposal process;
3) the exhaust steam water coolant adopts recirculated cooling water, has significantly reduced quantity of wastewater effluent;
4) regularly discharge the condensation waste liquid, guarantee the quality of water coolant, when reducing quantity of wastewater effluent, need not to improve the equipment material of whole condenser system.
Description of drawings
Below in conjunction with accompanying drawing the present invention is done further detailed description.
Fig. 1 is traditional heat drying exhaust steam processing technological flow figure;
Fig. 2 is a kind of energy conserving system process flow sheet that is applied to the sludge treatment disposal of patent of the present invention.
Among the figure: 1. direct contact type condensing surface, 2. flow process blower fan, 3. water seal arrangement, 4. recirculated cooling water pump, 5. lithium bromide absorption type heat pump unit, 6. variable valve.
Embodiment
Be further described below in conjunction with the case specific embodiments of the invention:
Certain sewage work's day is handled sludge quantity 75tDS/d; Desiccation machine inlet moisture percentage in sewage sludge 75% ± 3%, promptly solid content is 25% ± 3%, requires desiccation machine outlet mud solid content to be increased to 90%; Two production lines are set, and every production line is handled wet sludge quantity 150tWS/d.The sludge drying machine adopts two oar blade type desiccation machines of indirect contact, and the mummification heating agent adopts hot steam, adopts combustion gas or methane boiler that high-temperature steam is provided.
Adopt patent of the present invention to handle the sludge drying exhaust steam of present case, embodiment is following:
From the waste hot steam temperature of mud heat drying machine about 95 ℃ ~ 100 ℃, in flow process blower fan (2) effect down, get into direct contact type condensing surface (1), non-condensable gas is also extracted the entering deodoration system out through flow process blower fan (2).Water coolant in the condensing surface adopts recirculated cooling water pump (4) to recycle, and the leaving water temperature(LWT) of recirculated cooling water designs about 40 ℃, and the return water temperature of water coolant is designed to 20 ℃.Lithium bromide absorption type heat pump unit (5) is set on the outlet line of recirculated cooling water pump (4); Reclaim the heat in the recirculated cooling water; And the temperature of recirculated cooling water is reduced to 20 ℃ of design temperatures, the circulation of sludge digestion tank simultaneously adds hot water gets into lithium bromide absorption type heat pump unit (5) behind sludge digestion tank about 50 ℃ ~ 65 ℃ of temperature, behind lithium bromide absorption type heat pump unit (5); Recirculated water is heated to 75 ℃ ~ 90 ℃, gets into sludge digestion tank again and supplies sludge digestion to use.
(present case is a thermal oil to utilize the heating medium of mud heat drying machine; About 160 ℃ of temperature) as the driving heat source of lithium bromide absorption type heat pump unit (5); With a spot of high temperature heat source, absorb low-temperature heat source, output more can effectively utilize in warm source.
While is at the bottom of the water seal arrangement (3) of direct contact type condensing surface (1) installing variable valve (6); Regular discharge unit condensation waste liquid; The exhaust temperature of condensation waste liquid is not higher than 40 ℃; And replenish fresh water coolant at direct contact type condensing surface (1) top, to regulate the water quality of recirculated cooling water.
The exhaust steam refrigeration cycle water yield of present case wall scroll production line is 121m
3/ h, two production lines are total to 242m
3/ h, the efficiency coefficient of lithium bromide absorption type heat pump unit is taken as 1.6, utilizes the recyclable heat 5620kW of energy conserving system of the present invention, and every year reclaim heat 16 * 10 by 7920h year working time
4GJ can practice thrift about 0.68 ten thousand ton of standard coal equivalent every year, can practice thrift about 5,110,000 m of Sweet natural gas every year
3, system's used heat utilization ratio can reach more than 70%, and this system can reduce 1,740,000 tons of sewage discharges every year simultaneously.
The present invention is in whole mud heat drying treatment and disposal process; With a spot of high temperature heat source; Recycling is with a large amount of low-temperature heat quantities of condensation discharging of waste liquid; Improve the used heat utilising efficiency of system, reduced energy consumption and wastewater discharge in the whole sludge treatment disposal process, thereby saved the overall operation cost.
The above-mentioned embodiment that only combines accompanying drawing and case exemplarily to describe patent of the present invention, but the concrete realization of patent of the present invention is not limited to aforesaid way.Any unsubstantiality that the technical scheme of patent of the present invention is carried out is changed the protection domain that all should be regarded as patent of the present invention.
Claims (3)
1. one kind is applied to the energy conserving system that sludge treatment is disposed, and it is characterized in that: adopt the lithium bromide absorption type heat pump unit to reclaim the low-temperature waste heat in the condensation waste liquid, output can supply that sludge digestion tank uses in warm source.
2. a kind of energy conserving system that sludge treatment is disposed that is applied to according to claim 1 is characterized in that: the heating steam of employing mud heat drying machine or thermal oil are as the driving heat source of lithium bromide absorption type heat pump unit.
3. a kind of energy conserving system that sludge treatment is disposed that is applied to according to claim 1 is characterized in that: the recirculated cooling water pump is set, to reduce wastewater discharge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100066654A CN102515462A (en) | 2012-01-11 | 2012-01-11 | Energy-saving system applied to sludge treatment and disposal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100066654A CN102515462A (en) | 2012-01-11 | 2012-01-11 | Energy-saving system applied to sludge treatment and disposal |
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| CN102515462A true CN102515462A (en) | 2012-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012100066654A Pending CN102515462A (en) | 2012-01-11 | 2012-01-11 | Energy-saving system applied to sludge treatment and disposal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103723901A (en) * | 2012-10-12 | 2014-04-16 | 上海市政工程设计研究总院（集团）有限公司 | Method for preheating digestion treatment inlet sludge by sludge drying waste heat |
| CN107585996A (en) * | 2017-09-26 | 2018-01-16 | 江苏中圣高科技产业有限公司 | The sludge drying system and method for a kind of high-efficient energy-saving environment friendly |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2807153Y (en) * | 2005-07-07 | 2006-08-16 | 万杰集团有限责任公司 | Condensed water waste heat recovery and utilization device for lithium bromide refrigerating unit |
| KR20070053178A (en) * | 2007-04-04 | 2007-05-23 | 박경식 | The sludge drying machine |
| CN201186893Y (en) * | 2008-03-14 | 2009-01-28 | 清华大学 | Heat pump and sludge dewatering integrated system |
| KR20100055192A (en) * | 2008-11-17 | 2010-05-26 | 이영성 | Sludge drying system |
| CN201670796U (en) * | 2010-04-28 | 2010-12-15 | 轻工业环境保护研究所 | Sludge drying-incineration integrated treatment system |
| CN201753303U (en) * | 2010-04-21 | 2011-03-02 | 北京机电院高技术股份有限公司 | Steam low-temperature quenching and tempering complete sludge drying device |
-
2012
- 2012-01-11 CN CN2012100066654A patent/CN102515462A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2807153Y (en) * | 2005-07-07 | 2006-08-16 | 万杰集团有限责任公司 | Condensed water waste heat recovery and utilization device for lithium bromide refrigerating unit |
| KR20070053178A (en) * | 2007-04-04 | 2007-05-23 | 박경식 | The sludge drying machine |
| CN201186893Y (en) * | 2008-03-14 | 2009-01-28 | 清华大学 | Heat pump and sludge dewatering integrated system |
| KR20100055192A (en) * | 2008-11-17 | 2010-05-26 | 이영성 | Sludge drying system |
| CN201753303U (en) * | 2010-04-21 | 2011-03-02 | 北京机电院高技术股份有限公司 | Steam low-temperature quenching and tempering complete sludge drying device |
| CN201670796U (en) * | 2010-04-28 | 2010-12-15 | 轻工业环境保护研究所 | Sludge drying-incineration integrated treatment system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103723901A (en) * | 2012-10-12 | 2014-04-16 | 上海市政工程设计研究总院（集团）有限公司 | Method for preheating digestion treatment inlet sludge by sludge drying waste heat |
| CN107585996A (en) * | 2017-09-26 | 2018-01-16 | 江苏中圣高科技产业有限公司 | The sludge drying system and method for a kind of high-efficient energy-saving environment friendly |
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Application publication date: 20120627 |