CN112665367A - Step cooling reheating sludge heat pump belt type drying unit - Google Patents
Step cooling reheating sludge heat pump belt type drying unit Download PDFInfo
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- CN112665367A CN112665367A CN202011631443.2A CN202011631443A CN112665367A CN 112665367 A CN112665367 A CN 112665367A CN 202011631443 A CN202011631443 A CN 202011631443A CN 112665367 A CN112665367 A CN 112665367A
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Abstract
The invention discloses a stepped cooling reheating sludge heat pump belt type drying unit, which comprises a unit integral frame system, an air circulation treatment system, a low-temperature refrigeration heat pump system and a high-temperature refrigeration heat pump system; air enters an air circulation treatment system from a sludge drying chamber, is precooled by a surface cooler, and then sequentially passes through an evaporator of a high-temperature and low-temperature refrigeration heat pump system, and the circulating air is fully cooled by three-time gradient heat exchange and temperature reduction, so that the dehumidification capacity is improved; the dry air passes through the condenser of the low-temperature and high-temperature refrigeration heat pump system in sequence, and finally passes through the adjustable electric heater to realize the step reheating of the dry air. The invention can simultaneously improve the condensation temperature and reduce the evaporation temperature, realizes the large temperature difference circulation of air in the drying process of the sludge heat pump, ensures the air supply temperature, realizes the deep dehumidification of the circulating air, improves the single circulation dehumidification capacity of the air, and solves the problems of poor dehumidification capability and low energy efficiency of the existing sludge drying unit.
Description
Technical Field
The invention belongs to the field of crossing of a refrigeration heat pump technology and a drying mechanical device technology, and particularly relates to a step cooling reheating sludge heat pump belt type drying unit.
Background
In recent years, with the continuous increase of domestic sewage and sludge yield due to the rapid development of economy, the reasonable and efficient treatment of sludge becomes a key task to be solved urgently. In the process of sludge recycling treatment, sludge drying is a crucial link, and compared with the traditional drying means, the sludge heat pump drying technology has obvious advantages. Related researches indicate that for the sludge heat pump drying unit, the higher the temperature of circulating air entering a sludge drying chamber is, the faster the sludge moisture is evaporated, and the more moisture is taken away from the sludge; the lower the low temperature reached during cooling of the circulating air, the more moisture is condensed and dehumidified. Therefore, the higher the condensation temperature of the sludge heat pump drying unit is, the lower the evaporation temperature is, and the sludge drying process is more beneficial. However, the conventional sludge heat pump drying unit adopts a single-stage refrigeration system design, the condensing temperature and the evaporating temperature of the unit are synchronously increased or reduced, and the increase of the condensing temperature and the reduction of the evaporating temperature are difficult to realize at the same time.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a step-cooling reheating sludge heat pump belt type drying unit which has the advantages of being capable of simultaneously improving condensation temperature and reducing evaporation temperature, realizing large temperature difference circulation of air in a sludge heat pump drying process, performing circulating air deep cooling and deep dehumidification while ensuring air supply temperature, improving dehumidification capacity of the air in a single circulation process, and solving the problems of poor dehumidification capacity and low energy efficiency of the conventional sludge drying unit.
The technical scheme is as follows: the invention comprises a unit overall frame system and an air circulation processing system, wherein the unit overall frame system comprises a unit outer frame and an air duct separation frame arranged in the middle of the unit outer frame; the air circulation processing system is arranged in an air channel formed by the outer frame of the unit and the air channel separation frame, and comprises an axial flow return fan arranged at an air channel inlet, a surface air cooler positioned on the left side of the air channel separation frame and an air supply fan arranged at an air channel outlet; a low-temperature refrigeration heat pump system and a high-temperature refrigeration heat pump system are arranged in the air channel separation frame, wherein a high-temperature evaporator and a high-temperature condenser of the high-temperature refrigeration heat pump system, and a low-temperature evaporator and a low-temperature condenser of the low-temperature refrigeration heat pump system are arranged in the air channel below the air channel separation frame, the low-temperature evaporator and the low-temperature condenser are arranged between the high-temperature evaporator and the high-temperature condenser, and an adjustable electric heater is arranged on the right side of the high-temperature condenser; the circulating air is subjected to three-time cascade heat exchange and cooling by the surface cooler, the high-temperature evaporator and the low-temperature evaporator, and then is subjected to cascade heating by the low-temperature condenser, the high-temperature condenser and the adjustable electric heater.
The whole frame system of unit is including setting up the surface cooler outlet pipe in the first half on the surface cooler left side to and set up the surface cooler inlet tube in the latter half on the surface cooler left side, rivers in the surface cooler adopt countercurrent flow with circulating air to arrange.
The high temperature evaporator and the low temperature evaporator's below is provided with the drip tray, and drip tray central authorities set up condensation pressure differential drain pipe for the comdenstion water of circulated air cooling dehumidification in-process discharges, and the valve is opened a partial comdenstion water of discharging when the comdenstion water yield gathers when certain weight, and this kind of drainage structures can realize draining orificial liquid seal effect, prevents the problem of leaking out of drainage in-process.
The low-temperature refrigeration heat pump system comprises a low-temperature compressor, a low-temperature condenser, a low-temperature liquid storage device, a low-temperature drying filter, a low-temperature expansion valve, a low-temperature evaporator and a low-temperature gas-liquid separator which are sequentially connected, and the low-temperature circulation process of the refrigerant is realized.
A low-temperature low-pressure meter is arranged between the low-temperature gas-liquid separator and the low-temperature compressor and used for monitoring the suction pressure of the low-temperature compressor; the inlet and the outlet of the low-temperature compressor are provided with low-temperature high-low pressure controllers; the pressure of the cryogenic compressor can be monitored and controlled.
The high-temperature refrigeration heat pump system comprises a high-temperature compressor, a high-temperature condenser, a high-temperature liquid storage device, a high-temperature drying filter, a high-temperature expansion valve, a high-temperature evaporator and a high-temperature gas-liquid separator which are sequentially connected, and the high-temperature circulation process of the refrigerant is realized.
And a high-temperature ball valve is arranged between the high-temperature liquid storage device and the high-temperature drying filter and used for cutting off a high-temperature refrigerant flow path when the high-temperature drying filter is cleaned or replaced.
Still include sludge treatment system, sludge treatment system includes the mud conveyer belt of a plurality of parallel dislocation arrangements, sets up the mud shaping slitter in mud conveyer belt upper right side and sets up the dry sludge conveyer in mud conveyer belt right side below, realizes feeding, mummification and the ejection of compact of mud through using mud shaping slitter, mud conveyer belt, dry sludge conveyer.
The sludge conveying belt is provided with a sludge cleaning brush at one end close to the outer frame of the unit, can clean sludge adhered on the conveying belt, and is also used for shielding the conveying belt of the lower layer, which falls from the upper layer conveying belt, of the sludge.
The dry sludge conveyor adopts a spiral conveyor, and the structure can prevent the air leakage problem in the dry sludge collection process and realize the automatic conveying and collection of the dry sludge.
Has the advantages that: compared with the prior art, the invention has the beneficial effects that: through circulating air's cascade cooling and cascade heating, realized circulating air's big difference in temperature circulation, improve condensation temperature and reduce evaporating temperature simultaneously at circulating air treatment process, carry out circulating air degree of depth dehumidification when guaranteeing air supply temperature, improve the air single circulation dehumidification portion, solve the poor, the lower problem of efficiency of current sludge drying unit dehumidification ability.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
The invention is described in further detail below with reference to specific embodiments and the attached drawings.
As shown in figure 1, the invention comprises a unit integral frame system, an air circulation treatment system, a low-temperature refrigeration heat pump system, a high-temperature refrigeration heat pump system and a sludge treatment system. The whole frame system of the unit comprises a unit outer frame 101, an air duct separation frame 102, a condensation pressure difference drain pipe 103, a drip tray 104, a surface cooler water inlet pipe 105 and a surface cooler water outlet pipe 106. The outer frame 101 of the unit adopts a high-strength cold-bridge-proof aluminum alloy section bar, is matched with a color steel plate sandwich heat-insulating material wall plate, and has good wear-resisting, heat-insulating and corrosion-resisting properties after the surface is subjected to anodic oxidation treatment. The air channel separation frame 102 is arranged in the middle of the unit outer frame 101 and forms an independent air channel with the unit outer frame 101 to separate the circulating air from the high and low temperature refrigeration heat pump system, corrosive and flammable explosive gas components may be contained in the heat and mass transfer process between the circulating air and the sludge, and the air channel separation frame 102 can ensure that the high and low temperature refrigeration heat pump system is not corroded by the circulating air, so that the system can stably and continuously run. The condensation pressure difference drain pipe 103 is used for discharging condensed water in the circulating air cooling and dehumidifying process, is arranged in the middle of the drip tray 104, adopts pressure difference automatic drainage, and opens a part of the discharged condensed water when the amount of the condensed water is accumulated to a certain weight, so that the liquid seal effect of a drain pipe opening can be realized, the air leakage problem in the drainage process is prevented, and the automatic drainage function is realized. The drip tray 104 is disposed below the high temperature evaporator 414 and the low temperature evaporator 314 for collecting condensed water, and is made of stainless steel to prevent possible corrosion of circulating air.
The air circulation processing system is arranged in the air duct and comprises a medium-efficiency filter 201, a primary-efficiency filter 202, an axial flow return air fan 203, an air supply flow equalizer 204, an air supply fan 205, an adjustable electric heater 206 and a surface air cooler 207. The axial flow return air fan 203 belongs to important equipment for air circulation and is used for sucking air from a sludge drying chamber so as to formally enter a circulation treatment process. The axial flow return air fan 203 is arranged at the inlet of the air duct, and the primary filter 202 and the intermediate filter 201 are sequentially arranged at the air outlet of the axial flow return air fan 203. The primary filter 202 is used for coarse filtration of the recycled return air to separate large particulate solids therefrom. The middle-effect filter 201 is used for re-filtering the circulating air, and prevents impurities in the circulating air from polluting the heat exchanger and influencing the heat exchange effect of the system. Air supply flow equalizer 204 sets up in the wind channel air outlet department of sludge drying room bottom for circulating air reenters flow equalizing of sludge drying room, guarantees that a large amount of circulating air can distribute evenly, can more unify effectual heat transfer with mud, realizes the uniformity of sludge drying effect. The air supply fan 205 is arranged at the outlet of the air duct and used as power equipment for enabling reheated circulating air to enter the sludge drying chamber, and the air supply fan 205 and the axial flow return air fan 203 jointly form a power source for air circulation. The adjustable electric heater 206 is used for adjusting the reheating process of the circulating air, and the circulating air may need the electric heater for auxiliary temperature rise during the startup of the unit and in different seasons to ensure the temperature of the air entering the sludge drying chamber. The surface cooler 207 is positioned on the left side of the air duct separation frame 102, a coil pipe finned heat exchanger is adopted, high-temperature circulating air is pre-cooled by water, air returning from the sludge drying chamber is still at a high temperature, the pre-cooling by using cold water has a remarkable effect, the refrigeration load of a refrigeration heat pump system can be reduced, and the operation efficiency of the system can be improved in the view of the whole sludge drying unit. The upper half part on the left side of the surface cooler 207 is provided with a surface cooler water outlet pipe 106, the lower half part on the left side of the surface cooler 207 is provided with a surface cooler water inlet pipe 105, and the arrangement of the surface cooler water inlet pipe 105 and the surface cooler water outlet pipe 106 realizes that cold water flows from bottom to top to realize counter-current heat exchange between water flow and circulating air.
The low-temperature refrigeration heat pump system and the high-temperature refrigeration heat pump system are arranged in the air duct separation frame 102, wherein a high-temperature evaporator 414 and a high-temperature condenser 413 of the high-temperature refrigeration heat pump system, and a low-temperature evaporator 314 and a low-temperature condenser 308 of the low-temperature refrigeration heat pump system are arranged in an air duct below the air duct separation frame 102, the low-temperature evaporator 314 and the low-temperature condenser 308 are arranged between the high-temperature evaporator 414 and the high-temperature condenser 413, and the right side of the high-temperature condenser 413 is provided with an adjustable electric heater 206; the circulating air is subjected to three-time cascade heat exchange and temperature reduction by the surface air cooler 207, the high-temperature evaporator 414 and the low-temperature evaporator 314, and then is subjected to cascade heating by the low-temperature condenser 308, the high-temperature condenser 413 and the adjustable electric heater 206.
The low-temperature refrigeration heat pump system further comprises a low-temperature gas-liquid separator 301, a low-temperature high-low pressure controller 302, a low-temperature low-pressure meter 303, a low-temperature compressor 304, a low-temperature high-pressure meter 305, a low-temperature needle valve 306, a low-temperature high-pressure controller 307, a low-temperature drying filter 309, a low-temperature ball valve 310, a low-temperature liquid storage 311, a low-temperature electromagnetic valve 312 and a low-temperature expansion valve 313. The low-temperature compressor 304, the low-temperature condenser 308, the low-temperature liquid storage 311, the low-temperature drying filter 309, the low-temperature expansion valve 313, the low-temperature evaporator 314 and the low-temperature gas-liquid separator 301 are connected in sequence, so that a low-temperature circulation process of the refrigerant is realized. In addition, a low-temperature high-pressure gauge 305, a low-temperature needle valve 306 and a low-temperature high-pressure controller 307 are arranged between the low-temperature compressor 304 and the low-temperature condenser 308, the low-temperature high-pressure gauge 305 monitors the discharge pressure of the low-temperature compressor 304, and the low-temperature high-pressure controller 307 realizes the safety control of the discharge pressure of the low-temperature compressor 304. A low-temperature ball valve 310 is provided between low-temperature accumulator 311 and low-temperature filter drier 309 to block the low-temperature refrigerant flow path when low-temperature filter drier 309 is cleaned or replaced. A low temperature solenoid valve 312 is provided between the low temperature dry filter 309 and the low temperature expansion valve 313, and the flow of refrigerant is shut off at the time of shutdown. A low-temperature low-pressure meter 303 is disposed between the low-temperature gas-liquid separator 301 and the low-temperature compressor 304 for monitoring the suction pressure of the low-temperature compressor 304. The inlet and outlet of the low-temperature compressor 304 are provided with a low-temperature high-low pressure controller 302 to realize the safe and reasonable control of the suction and exhaust pressure.
The high-temperature refrigeration heat pump system further comprises a high-temperature gas-liquid separator 401, a high-temperature high-low pressure controller 402, a high-temperature low-pressure meter 403, a high-temperature compressor 404, a high-temperature high-pressure meter 405, a high-temperature needle valve 406, a high-temperature high-pressure controller 407, a high-temperature drying filter 408, a high-temperature ball valve 409, a high-temperature liquid reservoir 410, a high-temperature electromagnetic valve 411 and a high-temperature expansion valve 412. The high-temperature compressor 404, the high-temperature condenser 413, the high-temperature reservoir 410, the high-temperature drying filter 408, the high-temperature expansion valve 412, the high-temperature evaporator 414 and the high-temperature gas-liquid separator 401 are connected in sequence, so that a high-temperature circulation process of the refrigerant is realized. In addition, a high-temperature high-pressure gauge 405, a high-temperature needle valve 406 and a high-temperature high-pressure controller 407 are arranged between the high-temperature compressor 404 and the high-temperature condenser 413, the high-temperature high-pressure gauge 405 monitors the exhaust pressure of the high-temperature compressor 404, and the high-temperature high-pressure controller 407 realizes the safety control of the exhaust pressure of the high-temperature compressor 404; a high-temperature ball valve 409 is arranged between the high-temperature reservoir 410 and the high-temperature drying filter 408 and is used for cutting off a high-temperature refrigerant flow path when the high-temperature drying filter 408 is cleaned or replaced; a high-temperature solenoid valve 411 is arranged between the high-temperature dry filter 408 and the high-temperature expansion valve 412, and the flow of the refrigerant is cut off when the engine is stopped; a high-temperature low-pressure meter 403 is arranged between the high-temperature gas-liquid separator 401 and the high-temperature compressor 404 to monitor the suction pressure of the high-temperature compressor 404; the inlet and outlet of the high-temperature compressor 404 are provided with high-temperature high-low pressure controllers 402 to realize safe and reasonable control of the suction and exhaust pressure. The drip tray 104 is disposed below the high temperature evaporator 414 and the low temperature evaporator 314.
The sludge treatment system comprises a sludge cleaning brush 501, a sludge forming slitter 502, a dry sludge conveyor 503 and a sludge conveying belt 504. The sludge cleaning brush 501 is arranged at one end of the sludge conveying belt 504 close to the unit outer frame 101 or the air channel separation frame 102, is used for cleaning sludge adhered to the conveying belt, and is also used for shielding the conveying belt of a lower layer, which drops from an upper layer of the conveying belt, of sludge, so that the sludge is prevented from directly dropping to the bottom of the sludge drying chamber from the conveying belt in the process, and the sludge drying process cannot be realized, and the stable operation of the unit is influenced by the long-term accumulation of the sludge. The sludge forming slitter 502 is arranged at the right upper part of the sludge conveying belt 504 and is used for forming and slitting massive sludge, and the sludge forming slitter 502 can cut the sludge into different shapes according to sludge with different properties and different moisture contents so as to realize the optimal heat and mass transfer effect between the sludge and circulating air. The dry sludge conveyor 503 is arranged at the right lower part of the sludge conveying belt 504 and is used for conveying dried sludge, and the spiral structure conveyor is adopted, so that the air leakage problem in the dry sludge collecting process can be prevented, and the automatic conveying and collecting of the dry sludge can be realized. The sludge conveying belt 504 is used for conveying sludge from the top to the bottom of the sludge drying chamber, continuous heat and mass transfer is carried out on the sludge and circulating air in the process, the sludge conveying belt is provided with a mesh belt with holes, the size and the density of mesh belt holes, the running speed of the conveying belt, the number of layers of the conveying belt and the like are set in a differentiation mode, and the sludge drying process is optimally designed according to different chemical properties and different moisture contents.
Air enters an air circulation treatment system from a sludge drying chamber, is precooled by a surface cooler 207, and then sequentially passes through evaporators of a high-temperature refrigeration heat pump system and a low-temperature refrigeration heat pump system, and the circulating air is fully cooled by three-time gradient heat exchange and cooling, so that the dehumidification capacity is improved; the dry air passes through the low-temperature refrigeration heat pump system and the condenser of the high-temperature refrigeration heat pump system in sequence, and finally passes through the adjustable electric heater 206, so that the step reheating of the dry air is realized. The invention can simultaneously improve the condensation temperature and reduce the evaporation temperature, realize the large temperature difference circulation of air in the drying process of the sludge heat pump, realize the deep dehumidification of the circulating air while ensuring the air supply temperature, improve the single circulation dehumidification capacity of the air, and solve the problems of poor dehumidification capability and low energy efficiency of the existing sludge drying unit.
Claims (10)
1. The utility model provides a step cooling reheat sludge heat pump belt mummification unit, includes whole frame system of unit and air cycle processing system, its characterized in that: the whole unit frame system comprises a unit outer frame (101) and an air duct separation frame (102) arranged in the middle of the unit outer frame (101); the air circulation processing system is arranged in an air channel formed by the unit outer frame (101) and the air channel separation frame (102), and comprises an axial flow return fan (203) arranged at an air channel inlet, a surface air cooler (207) positioned on the left side of the air channel separation frame (102) and an air supply fan (205) arranged at an air channel outlet;
a low-temperature refrigeration heat pump system and a high-temperature refrigeration heat pump system are arranged in the air channel separation frame (102), wherein a high-temperature evaporator (414) and a high-temperature condenser (413) of the high-temperature refrigeration heat pump system, a low-temperature evaporator (314) and a low-temperature condenser (308) of the low-temperature refrigeration heat pump system are arranged in an air channel below the air channel separation frame (102), the low-temperature evaporator (314) and the low-temperature condenser (308) are arranged between the high-temperature evaporator (414) and the high-temperature condenser (413), and an adjustable electric heater (206) is arranged on the right side of the high-temperature condenser (413); the circulating air is subjected to three-time cascade heat exchange and temperature reduction by the surface air cooler (207), the high-temperature evaporator (414) and the low-temperature evaporator (314), and then is subjected to cascade heating by the low-temperature condenser (308), the high-temperature condenser (413) and the adjustable electric heater (206).
2. The step-cooled reheat sludge heat pump belt drying unit as claimed in claim 1, wherein: the whole frame system of the unit comprises a surface cooler water outlet pipe (106) arranged on the upper half part of the left side of the surface cooler (207) and a surface cooler water inlet pipe (105) arranged on the lower half part of the left side of the surface cooler (207), and water flow and circulating air in the surface cooler (207) are arranged in a countercurrent heat exchange mode.
3. The step-cooled reheat sludge heat pump belt drying unit as claimed in claim 1, wherein: a drip tray (104) is arranged below the high-temperature evaporator (414) and the low-temperature evaporator (314), and a condensation pressure difference drain pipe (103) is arranged in the center of the drip tray (104) and used for discharging condensed water in the circulating air cooling and dehumidifying process.
4. The step-cooled reheat sludge heat pump belt drying unit as claimed in claim 1, wherein: the low-temperature refrigeration heat pump system comprises a low-temperature compressor (304), a low-temperature condenser (308), a low-temperature liquid storage device (311), a low-temperature drying filter (309), a low-temperature expansion valve (313), a low-temperature evaporator (314) and a low-temperature gas-liquid separator (301) which are connected in sequence.
5. The step-cooled reheat sludge heat pump belt drying unit as claimed in claim 4, wherein: a low-temperature low-pressure meter (303) is arranged between the low-temperature gas-liquid separator (301) and the low-temperature compressor (304) and is used for monitoring the suction pressure of the low-temperature compressor (304); and a low-temperature high-low pressure controller (302) is arranged at an inlet and an outlet of the low-temperature compressor (304).
6. The step-cooled reheat sludge heat pump belt drying unit as claimed in claim 1, wherein: the high-temperature refrigeration heat pump system comprises a high-temperature compressor (404), a high-temperature condenser (413), a high-temperature liquid storage device (410), a high-temperature drying filter (408), a high-temperature expansion valve (412), a high-temperature evaporator (414) and a high-temperature gas-liquid separator (401) which are sequentially connected.
7. The step-cooled reheat sludge heat pump belt drying unit as claimed in claim 6, wherein: and a high-temperature ball valve (409) is arranged between the high-temperature liquid reservoir (410) and the high-temperature drying filter (408).
8. The step-cooled reheat sludge heat pump belt drying unit as claimed in any one of claims 1 to 7, wherein: the sludge treatment system comprises a plurality of sludge conveying belts (504) which are arranged in a parallel staggered manner, a sludge forming slitter (502) arranged on the upper right of the sludge conveying belts (504) and a dry sludge conveyor (503) arranged on the lower right of the sludge conveying belts (504).
9. The step-cooled reheat sludge heat pump belt drying unit as claimed in claim 8, wherein: and a sludge cleaning brush (501) is arranged at one end of the sludge conveying belt (504) close to the outer frame (101) of the unit.
10. The step-cooled reheat sludge heat pump belt drying unit as claimed in claim 8, wherein: the dry sludge conveyor (503) adopts a screw conveyor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011631443.2A CN112665367A (en) | 2020-12-31 | 2020-12-31 | Step cooling reheating sludge heat pump belt type drying unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011631443.2A CN112665367A (en) | 2020-12-31 | 2020-12-31 | Step cooling reheating sludge heat pump belt type drying unit |
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| CN112665367A true CN112665367A (en) | 2021-04-16 |
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| CN202011631443.2A Pending CN112665367A (en) | 2020-12-31 | 2020-12-31 | Step cooling reheating sludge heat pump belt type drying unit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113716638A (en) * | 2021-09-26 | 2021-11-30 | 集美大学 | Kitchen waste heat pump drying and MVR (mechanical vapor recompression) concentration treatment device and process |
| CN114835373A (en) * | 2022-06-13 | 2022-08-02 | 广东帝烨能源设备有限公司 | Separated high-efficiency sludge low-temperature drying machine |
| CN114992888A (en) * | 2022-04-27 | 2022-09-02 | 江苏博一环保科技有限公司 | Corrosion-resistant heat pump for low-temperature sludge drying |
-
2020
- 2020-12-31 CN CN202011631443.2A patent/CN112665367A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113716638A (en) * | 2021-09-26 | 2021-11-30 | 集美大学 | Kitchen waste heat pump drying and MVR (mechanical vapor recompression) concentration treatment device and process |
| CN114992888A (en) * | 2022-04-27 | 2022-09-02 | 江苏博一环保科技有限公司 | Corrosion-resistant heat pump for low-temperature sludge drying |
| CN114992888B (en) * | 2022-04-27 | 2023-07-28 | 江苏博一环保科技有限公司 | Corrosion-resistant heat pump for sludge low-temperature drying |
| CN114835373A (en) * | 2022-06-13 | 2022-08-02 | 广东帝烨能源设备有限公司 | Separated high-efficiency sludge low-temperature drying machine |
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