CN111912211A - Sludge heat pump drying system based on air treatment unit - Google Patents
Sludge heat pump drying system based on air treatment unit Download PDFInfo
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- CN111912211A CN111912211A CN202010718863.8A CN202010718863A CN111912211A CN 111912211 A CN111912211 A CN 111912211A CN 202010718863 A CN202010718863 A CN 202010718863A CN 111912211 A CN111912211 A CN 111912211A
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- air
- drying
- hot
- sludge
- pipe
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/02—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts carrying the materials; with movement performed by belts or elements attached to endless belts or chains propelling the materials over stationary surfaces
- F26B17/04—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts carrying the materials; with movement performed by belts or elements attached to endless belts or chains propelling the materials over stationary surfaces the belts being all horizontal or slightly inclined
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
- F26B21/002—Drying-air generating units, e.g. movable, independent of drying enclosure heating the drying air indirectly, i.e. using a heat exchanger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
- F26B21/04—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/08—Humidity
- F26B21/086—Humidity by condensing the moisture in the drying medium, which may be recycled, e.g. using a heat pump cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/001—Heating arrangements using waste heat
- F26B23/002—Heating arrangements using waste heat recovered from dryer exhaust gases
- F26B23/005—Heating arrangements using waste heat recovered from dryer exhaust gases using a closed cycle heat pump system ; using a heat pipe system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/005—Treatment of dryer exhaust gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
- F26B2200/18—Sludges, e.g. sewage, waste, industrial processes, cooling towers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Sustainable Development (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a sludge heat pump drying system based on an air treatment unit, which comprises a heat pump system, the air treatment unit and a drying box system. A condenser of the heat pump system provides a heat source for sludge drying through a hot water pipeline, and an evaporator provides a cold source for cooling and dehumidifying of a drying medium through a cold water pipeline. The air handling unit comprises a heating section, a dehumidifying section, a heat regenerator and a fan; the hot and humid air in the drying box system is precooled by a heat regenerator, dehumidified by a dehumidification section and dried by a heating section to finally become hot and dry air. And the dry hot air enters the drying box system, and is changed into damp hot air after exchanging heat with wet sludge, so as to form closed circulation of the drying system. The invention adopts the air handling unit to intensively process the drying medium, can provide drying hot air for more than two drying boxes simultaneously, and improves the total processing capacity of the sludge heat pump drying system.
Description
The technical field is as follows:
the invention relates to the field of sludge drying, in particular to a sludge heat pump drying device.
Technical background:
with the increasing depth of urbanization construction and the increasing population and the increasing sludge yield, the disposal of sludge has brought about great challenges for sewage treatment plants. In 2018, the sludge yield with 80% of water content in China reaches 5800 million tons, and according to the estimation, in 2022, 8000 million tons. With the improvement of national requirements for environmental protection, the treatment mode of sludge is gradually changed from large-scale landfill to incineration. Compared with landfill, the sludge incineration treatment method has higher requirements on the water content of the sludge. Even if the sludge is deeply dehydrated, the water content in the sludge still exceeds 50 percent, and the requirement of sludge incineration cannot be met, so the water content of the sludge must be further reduced by drying.
At present, the sludge heat drying is mainly based on the traditional heat drying technology and has the defects of high drying temperature, high energy consumption, reduced heat value of the dried sludge and the like. Compared with the traditional heat drying technology, the sludge heat pump drying technology has the advantages of low drying temperature, low energy consumption, sludge heat value preservation and the like.
The conventional heat pump sludge drying equipment integrates a heat pump system and a drying box system, dry hot air is blown out from the bottom of the drying box, and after the dry hot air is subjected to heat-mass exchange with sludge in the drying box to become damp hot air, the damp hot air directly enters the heat pump system through an air outlet, and after the damp hot air is subjected to heat exchange with a condensation section and an evaporation section of the heat pump system in sequence to become dry hot air, the dry hot air is blown out from the bottom of the drying box to form closed circulation. The traditional heat pump drying box has the characteristics of energy conservation and environmental friendliness. But because the drying box system and the heat pump system are designed into a whole, the sludge heat pump drying equipment with large capacity has large size, complex structure and large equipment noise. The heat pump system in the sludge drying equipment also has the problems of easy corrosion and the like. Therefore, it is necessary to design a sludge heat pump drying system, which can further improve the treatment capacity of the sludge heat pump drying system, reduce the noise of a working area and reduce the corrosion of the circulating air to the heat pump system.
The invention content is as follows:
aiming at the defects in the prior art, the invention aims to provide a sludge heat pump drying system based on an air treatment unit. The heat pump system is separated from the drying box system, and the two systems are connected through an air handling unit. The air handling unit can be used for intensively handling the drying medium, so that the corrosion of the drying medium to a heat pump system is reduced; the adopted drying box system can be formed by connecting more than 2 drying boxes in parallel, so that the total processing capacity of the sludge heat pump drying system is improved.
In order to achieve the technical effects, the invention adopts the following technical scheme:
a sludge heat pump drying system based on an air treatment unit is characterized by comprising a heat pump system, the air treatment unit and a drying box system;
the heat pump system is connected with the air treatment unit through a water pipe, and the air treatment unit is connected with the drying box system through an air pipe;
the drying box system is a working area and comprises a plurality of drying units which can work independently, and all the units are communicated through air pipes; each unit comprises a discharge hopper (1), a conveyor belt (2), a feed hopper (3), a drying box (4) and a porous plate (5); the conveyor belt (2) conveys wet sludge entering from the feed hopper (3) to the discharge hopper (1); the dry hot air sent by the air supply pipe (7) flows through the conveyor belt (2) through the porous plate (5) to dry wet sludge, and the wet hot air is formed and enters the return air pipe (12);
the air supply pipe (7) sends the hot dry air back to the drying box (4) to form closed circulation;
the air treatment unit comprises a heating section (9), a dehumidifying section (11), a heat regenerator (10) and a fan (8);
the heat pump system comprises an evaporator (13), a compressor (14), a condenser (15), an expansion valve (17) and a circulating water pump (18);
the air pipe comprises a return air pipe (12) and an air supply pipe (7);
the water pipe comprises a hot water pipe (16) and a cold water pipe (19); the hot water pipe (16) connects the condenser (15) with the heating section (9) in the air handling unit to provide a heat source for drying the sludge; the cold water pipe (19) connects the evaporator (13) with the dehumidification section (11) in the air handling unit, and provides a cold source for cooling and dehumidifying the hot and humid air in the working area.
The heat regenerator (10) is communicated with the dehumidification section (11); the dehumidification section (11) is communicated with the heating section (9) through a heat regenerator (10);
the drying box (4) is connected with the heat regenerator (10) through the air return pipe (12), and the hot and humid air in the air return pipe (12) is precooled in the heat regenerator (10) and then is cooled and dehumidified through the dehumidification section (11) to become cold and dry air; the heating section (9) heats air preheated by the heat regenerator (10); the fan (8) sends the dry hot air generated by the heating section (9) to the blast pipe (7) for supplying to the working area.
The invention relates to a sludge heat pump drying system based on an air handling unit, which has the following cycle working principle:
the hot and humid air in the air return pipe 12 is precooled in the heat regenerator 10, cooled and dehumidified by the dehumidifying section 11 to become cold and dry air, and then heated by the heating section 9 to form hot and dry air; the dry hot air is sent to the blast pipe 7 through the fan 8, the blast pipe 7 is communicated with the bottom of the drying box 4, the dry hot air is changed into wet hot air after heat exchange with wet sludge in the drying box 4, and the wet hot air enters the return air pipe 12 from the upper part of the drying box 4, so that a closed cycle drying system is formed.
Compared with the prior art, the invention has the beneficial effects that: the heat pump system and the drying system are divided into two relatively independent systems, and the drying medium is intensively treated in the air treatment unit, so that the corrosion of the drying medium to the heat pump system is reduced. The position of the heat pump system is not limited in the drying equipment, the capacity and the size of the heat pump system can be adjusted according to the requirements of the drying box, and the size and the structural complexity of the drying box system are not increased. In addition, the position of the heat pump system can be arranged at a place far away from a working area according to the actual situation of a sludge treatment plant, so that the noise of the working area is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a sludge heat pump drying system based on an air handling unit.
In the figure: the device comprises a discharge hopper 1, a conveyor belt 2, a feed hopper 3, a drying box 4, a porous plate 5, an air valve 6, an air supply pipe 7, a fan 8, a heating section 9, a heat regenerator 10, a dehumidification section 11, an air return pipe 12, an evaporator 13, a compressor 14, a condenser 15, a hot water pipe 16, an expansion valve 17, a water pump 18 and a cold water pipe 19.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
A sludge heat pump drying system based on an air treatment unit is characterized by comprising a drying box system, the air treatment unit and a heat pump system;
the heat pump system is connected with the air treatment unit through a water pipe, and the air treatment unit is connected with the drying box system through an air pipe; the water pipe comprises a hot water pipe 16 and a cold water pipe 19; the air pipe comprises an air supply pipe 7 and an air return pipe 12;
the drying box system is a working area and comprises a plurality of drying units which can work independently, the drying units are communicated through air pipes, and the drying units are connected with the air handling unit through the air pipes; each drying unit comprises a discharge hopper 1, a conveyor belt 2, a feed hopper 3, a drying box 4, a porous plate 5 and an air valve 6; the drying box 4 is of a box body structure and is a drying container, and the drying box 4 is communicated with the air handling unit through an air supply pipe 7; an air valve 6 is arranged between the drying box 4 and the air supply pipe 7, and the air quantity sent into the drying box 4 by the air supply pipe 7 is controlled by adjusting the size of the valve of the air valve 6; the bottom of the drying box is provided with a porous plate 5 for uniform airflow; the feed hopper 3 is a feed inlet for wet sludge to enter the drying box 4, the wet sludge falls on the conveyor belt 2 after passing through the feed hopper 3, heat exchange is carried out on the conveyor belt 2 and dry air, the dry air is changed into damp and hot air, and the dried sludge is conveyed to the discharge hopper 1 through the conveyor belt 2; the damp and hot air enters the return air duct 12 through an air return opening at the upper part of the drying box 4; the drying box system can be formed by connecting more than 2 drying boxes in parallel, so that the total processing capacity of the sludge heat pump drying system is improved; the number of the drying boxes 4 can be selected according to the heating capacity of the heat pump system and the sludge treatment capacity of a single drying box;
the air handling unit comprises a heating section 9, a dehumidifying section 11, a heat regenerator 10 and a fan 8; the heat regenerator 10 is communicated with the heating section 9 and the dehumidifying section 11; the heating section 9 is an air heating zone, heat exchange is carried out between the air in the heating section 9 and a hot water pipe 16, the air in the heating section 9 is heated, and the heated air is sent into the blast pipe 7 through a fan 8; the dehumidification section 11 is an air cooling dehumidification area, and heat exchange is carried out between the dehumidification section 11 and the air through a cold water pipe 19, so that the humidity of the air in the dehumidification section 11 is reduced, and the air is changed into dry and cold air; the hot and humid air in the return air duct 12 of the drying box is conveyed to the heat regenerator 10, the heat regenerator 10 firstly transfers part of heat of the hot and humid air to the cold and dry air of the dehumidification section 11, the cold and dry air of the dehumidification section 11 is preheated, the hot and humid air of the heat regenerator 10 is changed into cold and humid air, then the cold and humid air enters the dehumidification section 11, the dehumidification is carried out in the dehumidification section 11, the dehumidified air enters the heating section 9 through the heat regenerator 10 to be heated and dried, and finally the hot and dry air is formed;
the heat pump system comprises an evaporator 13, a compressor 14, a condenser 15, an expansion valve 17 and a circulating water pump 18; the condenser 15 is used to continuously heat water in the hot water pipe 16; the evaporator 13 is used for continuously cooling water in the cold water pipe 19; the circulating water pump 18 provides kinetic energy for the circulating flow of water in the hot water pipe 16 and the cold water pipe 19; the cooperation of the condenser 15 and the circulating water pump 18 promotes the hot water to be always kept in the hot water pipe 16; the cooperation of the evaporator 13 and the circulating water pump 18 promotes the cold water pipe 19 to keep cold water all the time;
the blast pipe 7 is connected with a heating section 9 in the air handling unit and the bottom of the drying box 4 in the drying box system, and the blast pipe 7 is used for conveying hot dry air in the air handling unit; the return air pipe 12 is connected with the heat regenerator 10 in the air handling unit and the upper part of the drying box 4 in the drying box system, and the return air pipe 12 is used for conveying damp and hot air in the drying box system; the air return pipe 12 is connected with the air return openings of the drying boxes, collects the hot and humid air in the drying boxes and conveys the hot and humid air to the heat regenerator.
The hot water line 16 connects the condenser 15 to the heating section 9 of the air handling unit to provide a source of heat for drying the air in the heating section 9. The cold water pipe 19 connects the evaporator 13 with the dehumidifying section 11 of the air handling unit, and provides a cold source for cooling and dehumidifying air in the dehumidifying section 11.
The invention relates to a sludge heat pump drying system based on an air handling unit, which has the following cycle working principle:
the hot and humid air in the air return pipe 12 is precooled in the heat regenerator 10, cooled and dehumidified by the dehumidifying section 11 to become cold and dry air, and then heated by the heating section 9 to form hot and dry air; the dry hot air is sent to the blast pipe 7 through the fan 8, the blast pipe 7 is communicated with the bottom of the drying box 4, the dry hot air is changed into wet hot air after heat exchange with wet sludge in the drying box 4, and the wet hot air enters the return air pipe 12 from the upper part of the drying box 4, so that a closed cycle drying system is formed.
Further limiting the technical scheme, the blast pipe 7 uses an air valve 6 to adjust the air quantity of the hot air entering the drying box for drying.
Specifically, the compressor 14 is a screw compressor.
The hot water pipe 16 is arranged at the part of the heating section 9 for exchanging heat with the drying medium, the cold water pipe 19 is arranged at the part of the dehumidifying section 11, and the heat regenerator 10 are made of metal materials with corrosion resistance and high heat conductivity coefficient.
The feed hopper 3 and the discharge hopper 1 in the drying box are automatically closed after feeding and discharging are finished, and the drying box 4 is ensured to be in a closed state.
The porosity of the porous plate 5 is 0.25-0.35.
Claims (2)
1. A sludge heat pump drying system based on an air treatment unit is characterized by comprising a heat pump system, the air treatment unit and a drying box system;
the heat pump system is connected with the air treatment unit through a water pipe, and the air treatment unit is connected with the drying box system through an air pipe;
the drying box system is a working area and comprises a plurality of drying units which can work independently, and all the units are communicated through air pipes; each unit comprises a discharge hopper (1), a conveyor belt (2), a feed hopper (3), a drying box (4) and a porous plate (5); the conveyor belt (2) conveys wet sludge entering from the feed hopper (3) to the discharge hopper (1); the dry hot air sent by the air supply pipe (7) flows through the conveyor belt (2) through the porous plate (5) to dry wet sludge, and the wet hot air is formed and enters the return air pipe (12);
the air supply pipe (7) sends the hot dry air back to the drying box (4) to form closed circulation;
the air treatment unit comprises a heating section (9), a dehumidifying section (11), a heat regenerator (10) and a fan (8);
the heat pump system comprises an evaporator (13), a compressor (14), a condenser (15), an expansion valve (17) and a circulating water pump (18);
the air pipe comprises a return air pipe (12) and an air supply pipe (7);
the water pipe comprises a hot water pipe (16) and a cold water pipe (19); the hot water pipe (16) connects the condenser (15) with the heating section (9) in the air handling unit to provide a heat source for drying the sludge; the cold water pipe (19) connects the evaporator (13) with the dehumidification section (11) in the air handling unit, and provides a cold source for cooling and dehumidifying the hot and humid air in the working area.
2. The air handling unit-based sludge heat pump drying system according to claim 1, wherein:
the heat regenerator (10) is communicated with the dehumidification section (11); the dehumidification section (11) is communicated with the heating section (9) through a heat regenerator (10);
the drying box (4) is connected with the heat regenerator (10) through the air return pipe (12), and the hot and humid air in the air return pipe (12) is precooled in the heat regenerator (10) and then is cooled and dehumidified through the dehumidification section (11) to become cold and dry air; the heating section (9) heats air preheated by the heat regenerator (10); the fan (8) sends the dry hot air generated by the heating section (9) to the blast pipe (7) for supplying to the working area.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2020103805633 | 2020-05-05 | ||
| CN202010380563 | 2020-05-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111912211A true CN111912211A (en) | 2020-11-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010718863.8A Pending CN111912211A (en) | 2020-05-05 | 2020-07-23 | Sludge heat pump drying system based on air treatment unit |
Country Status (1)
| Country | Link |
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| CN (1) | CN111912211A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113173687A (en) * | 2021-04-27 | 2021-07-27 | 扬州大学 | Cold and heat source type sludge low-temperature drying system |
| CN115371410A (en) * | 2022-02-28 | 2022-11-22 | 沈阳澳蓝节能科技有限公司 | Drying unit based on solution dehumidification heat pump |
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| CN2222333Y (en) * | 1995-05-18 | 1996-03-13 | 金苏敏 | Air return heating device for hot pump wood drying machine |
| EP1621523A1 (en) * | 2004-07-30 | 2006-02-01 | Societe D'amenagement Urbain Et Rural | Installation for a combined drying of wastes, in particular wastewater sludge |
| CN201947927U (en) * | 2010-10-27 | 2011-08-31 | 珠海天济能源科技有限公司 | Central heating system for tobacco baking |
| KR20110133098A (en) * | 2010-06-04 | 2011-12-12 | 김미순 | Solar energy and high temperature hybrid system sludge drying system |
| CN202547322U (en) * | 2011-12-30 | 2012-11-21 | 成都东和工业有限责任公司 | Centralized heating drying device for air source heat pump |
| JP2013108678A (en) * | 2011-11-21 | 2013-06-06 | Kajima Corp | Vacuum dryer |
| CN107238262A (en) * | 2017-07-21 | 2017-10-10 | 浙江舟山华灿科技有限公司 | Heat pump intelligent power saving drying system |
| CN208458304U (en) * | 2018-03-22 | 2019-02-01 | 烟台大学 | A kind of heat pump assembly of indirect heat exchange |
| CN208500724U (en) * | 2018-05-23 | 2019-02-15 | 昆山绿威环保科技有限公司 | Sludge dehumidifying heat pump drying equipment |
| CN110513999A (en) * | 2019-08-25 | 2019-11-29 | 西北工业大学 | A kind of heat pipe heat exchanging dehumidification device based on absorption heat pump |
-
2020
- 2020-07-23 CN CN202010718863.8A patent/CN111912211A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2222333Y (en) * | 1995-05-18 | 1996-03-13 | 金苏敏 | Air return heating device for hot pump wood drying machine |
| EP1621523A1 (en) * | 2004-07-30 | 2006-02-01 | Societe D'amenagement Urbain Et Rural | Installation for a combined drying of wastes, in particular wastewater sludge |
| KR20110133098A (en) * | 2010-06-04 | 2011-12-12 | 김미순 | Solar energy and high temperature hybrid system sludge drying system |
| CN201947927U (en) * | 2010-10-27 | 2011-08-31 | 珠海天济能源科技有限公司 | Central heating system for tobacco baking |
| JP2013108678A (en) * | 2011-11-21 | 2013-06-06 | Kajima Corp | Vacuum dryer |
| CN202547322U (en) * | 2011-12-30 | 2012-11-21 | 成都东和工业有限责任公司 | Centralized heating drying device for air source heat pump |
| CN107238262A (en) * | 2017-07-21 | 2017-10-10 | 浙江舟山华灿科技有限公司 | Heat pump intelligent power saving drying system |
| CN208458304U (en) * | 2018-03-22 | 2019-02-01 | 烟台大学 | A kind of heat pump assembly of indirect heat exchange |
| CN208500724U (en) * | 2018-05-23 | 2019-02-15 | 昆山绿威环保科技有限公司 | Sludge dehumidifying heat pump drying equipment |
| CN110513999A (en) * | 2019-08-25 | 2019-11-29 | 西北工业大学 | A kind of heat pipe heat exchanging dehumidification device based on absorption heat pump |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113173687A (en) * | 2021-04-27 | 2021-07-27 | 扬州大学 | Cold and heat source type sludge low-temperature drying system |
| CN115371410A (en) * | 2022-02-28 | 2022-11-22 | 沈阳澳蓝节能科技有限公司 | Drying unit based on solution dehumidification heat pump |
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