CN210176709U - Sludge low-temperature heat pump drying equipment - Google Patents
Sludge low-temperature heat pump drying equipment Download PDFInfo
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- CN210176709U CN210176709U CN201920629926.5U CN201920629926U CN210176709U CN 210176709 U CN210176709 U CN 210176709U CN 201920629926 U CN201920629926 U CN 201920629926U CN 210176709 U CN210176709 U CN 210176709U
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Abstract
The utility model relates to a mud low temperature heat pump mummification equipment, including the sludge drying chamber, sludge drying chamber side top is equipped with into mud distributing device, sludge drying chamber one side is equipped with the heat pump system room, the indoor heat pump system that is equipped with of heat pump system, it includes from last mud fill and the cloth machine of advancing that sets up extremely down to advance mud distributing device, the sludge drying chamber is equipped with the mud entry, the cloth machine is connected with the mud entry, the sludge drying chamber bottom is equipped with sludge outlet, the indoor upper portion of sludge drying is equipped with air filter, the indoor middle part of sludge drying is equipped with a plurality of layers of conveying mesh belt, lower floor conveying mesh belt below is equipped with discharging device, discharging device is connected with sludge outlet, be equipped with auxiliary fan between the arbitrary adjacent two-layer conveying mesh belt, the indoor. The utility model has the advantages that: the drying energy consumption is low, no secondary pollution is caused, the safety performance is high, the structure is compact, and the occupied area is small.
Description
Technical Field
The utility model relates to a sludge treatment technical field particularly, relates to a mud low temperature heat pump mummification equipment.
Background
The water content of the sludge after dehydration treatment in a municipal sewage treatment plant is generally about 80%, and the sludge contains a large amount of toxic and harmful substances, is unstable in property and difficult to be recycled, so that proper drying treatment is extremely necessary before final treatment such as composting or incineration. The conventional sludge drying technologies comprise paddle type drying, fluidized bed drying, drum type drying and the like, but the conventional sludge drying technologies have the problems of high drying temperature, complex equipment structure, serious odor pollution and the like. However, the low-temperature heat pump drying technology has the unique advantages of low drying temperature, small occupied area, high drying efficiency and small pollution to the environment.
The low-temperature heat pump drying equipment adopts the technical principle of a dehumidification heat pump, fully utilizes the hot end and the cold end in a heat pump system, dehumidifies and heats air absorbing moisture in sludge, and recycles the air for the sludge, thereby achieving the purpose of drying the sludge.
At present, most sludge heat pump drying equipment causes odor generated in the drying process to be large and causes secondary pollution to the environment due to high drying temperature and poor equipment sealing, or the heat pump system is insufficient in energy utilization or poor in sludge pretreatment effect, the drying effect is not ideal, and the equipment energy consumption is high.
An effective solution to the problems in the related art has not been proposed yet.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned technical problem among the correlation technique, the utility model aims at providing a high efficiency, energy-conserving, safe, reliable mud low temperature heat pump mummification equipment, overcome among the prior art not enough in the above-mentioned aspect.
The utility model aims at realizing through the following technical scheme: a sludge low-temperature heat pump drying device comprises a sludge drying chamber, wherein a sludge feeding distributing device is arranged above the side of the sludge drying chamber, a heat pump system chamber is arranged on one side of the sludge drying chamber, a heat pump system is arranged in the heat pump system chamber, the sludge feeding distributing device comprises a sludge feeding hopper and a distributing machine which are arranged from top to bottom, the sludge drying chamber is provided with a sludge inlet, the distributing machine is connected with the sludge inlet, the bottom of the sludge drying chamber is provided with a sludge outlet, the upper part in the sludge drying chamber is provided with an air filtering device, the middle part in the sludge drying chamber is provided with a plurality of layers of conveying mesh belts, the lowest layer is provided with a discharging device below the conveying mesh belts, the discharging device is connected with the sludge outlet, an auxiliary fan is arranged between any two adjacent layers of conveying mesh belts, the bottom in the sludge drying chamber is provided with a plurality of main, a water pan is arranged below the heat recovery evaporator, a gas-liquid separator is arranged between the heat recovery evaporator and the compressor, the compressor is connected with the condenser assembly, the condenser assembly is connected with the heat exchanger, and the gas-liquid separator, the liquid storage tank and the thermal expansion valve are sequentially arranged between the heat exchanger and the heat recovery evaporator.
Further, the distributing machine comprises a pair of crushing rollers, a pair of mud making rollers and a pair of mud scraping knives below the mud making rollers.
Further, the heat recovery-evaporator comprises an evaporator and a heat recovery device, the heat recovery device comprises a cold end of the heat recovery device and a hot end of the heat recovery device, the evaporator is arranged between the cold end of the heat recovery device and the hot end of the heat recovery device, the cold end of the heat recovery device and the hot end of the heat recovery device are connected through two water pipes, one water pipe is provided with a water pump, the other water pipe is provided with an intermediate heat exchanger, the evaporator is respectively connected with the gas-liquid separator and the thermal expansion valve, the condenser assembly comprises a first condenser and a second condenser, and the inclination angles of the first condenser and the second condenser are 40-45 degrees.
Further, the medium in the heat regenerator is one of water, oil and glycol.
Further, the air filtering device comprises a first-stage filter and a second-stage filter, wherein the second-stage filter is arranged above the first-stage filter.
Furthermore, a first layer of conveying mesh belt and a second layer of conveying mesh belt are arranged in the middle of the sludge drying chamber, a diversion chute is arranged between the tail end of the first layer of conveying mesh belt and the head end of the second layer of conveying mesh belt, and the discharging device is arranged below the tail end of the second layer of conveying mesh belt.
Further, the discharging device comprises a discharging groove and a conveying screw machine.
Furthermore, two main fans are arranged at the bottom in the sludge drying chamber, two flow guide partition plates are arranged between the two main fans, included angles between the two flow guide partition plates and the bottom of the sludge drying chamber are 50-55 degrees, and the upper edges of the two flow guide partition plates are intersected at a position close to the bottom of the lowest layer of the conveying mesh belt.
The utility model has the advantages that:
the drying energy consumption is low: through setting up integral type backheat-evaporimeter, the cold volume of low temperature air is retrieved the hot-blast department in evaporimeter front end behind the circulated air through the evaporimeter, realizes the circulated air at the precooling of evaporimeter front end, reduces the load of evaporimeter, improves the load ratio of evaporimeter cold load at the dehumidification in-process, and then improves heat pump system's dehumidification volume, in regenerator medium circulation process, still can set up middle heat exchanger, will get back to the medium of regenerator cold junction and further cool down through outside cold source, can further improve the dehumidification volume of integral type backheat-evaporimeter. The heat regenerator also realizes the reheating of cold air behind the evaporator, reduces the load of a rear-end condenser and improves the heating quantity of a heat pump system, so that the energy consumption of the equipment for removing 1kg of water can reach 0.34kw.h, the minimum water content of the dried sludge can reach 10 percent, and the drying time can be adjusted according to the process requirements to reach different drying requirements.
Does not cause secondary pollution: the drying temperature is not more than 65 ℃, the volatile organic odor in the sludge drying process is less, the sludge drying chamber and the heat pump system box body are both closed box bodies, and the volatile small amount of gas is completely sealed in the box bodies.
The safety performance is high: the low-temperature drying technology (no more than 65 ℃) is adopted, no dust is generated, so that the explosion hazard is avoided, and the safety performance of the equipment is high.
Compact structure, area is little: the heat regenerator and the evaporator are integrated, so that the space requirement of the equipment is reduced, the condenser is obliquely arranged, the height of the equipment is reduced, the whole structure is compact, the equipment occupies small space, and the occupied area for treating ton mud is less than 1m2(dried to a water content of 60%).
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic structural view of a sludge low-temperature heat pump dryer according to an embodiment of the present invention;
FIG. 2 is a side view of a sludge low-temperature heat pump dryer according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an air circulation trajectory of a sludge low-temperature heat pump drying machine according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a heat pump system of a sludge low-temperature heat pump drying machine according to an embodiment of the present invention.
In the figure: 1. a mud feeding hopper; 2. a material distributor; 3. a first layer of conveying mesh belt; 4. a diversion chute; 5. a second layer of conveying mesh belt; 6. a discharge chute; 7. a conveying screw; 8. a first stage filter; 9. a second stage filter; 10. a regenerative-evaporator; 11. a compressor; 12. a first condenser; 13. a second condenser; 14. a heat exchanger; 15. an auxiliary fan; 16. a main fan; 17. a flow guide clapboard; 18. an evaporator; 19. a heat end of the heat regenerator; 20. a water pump; 21. an intermediate heat exchanger; 22. a gas-liquid separator; 23. a liquid storage tank; 24. a thermostatic expansion valve; 25. the cold end of the regenerator.
Detailed Description
As shown in figures 1-4, the sludge low-temperature heat pump drying equipment of the embodiment of the utility model comprises a sludge drying chamber, a sludge feeding and distributing device is arranged above the sludge drying chamber, a heat pump system chamber is arranged on one side of the sludge drying chamber, a heat pump system is arranged in the heat pump system chamber, the sludge feeding and distributing device comprises a sludge hopper 1 and a distributing machine 2 which are arranged from top to bottom, the sludge drying chamber is provided with a sludge inlet, the distributing machine 2 is connected with the sludge inlet, the bottom of the sludge drying chamber is provided with a sludge outlet, the upper part in the sludge drying chamber is provided with an air filtering device, the middle part in the sludge drying chamber is provided with a plurality of layers of conveying mesh belts, the lowest layer of conveying mesh belt is provided with a discharging device below, the discharging device is connected with the sludge outlet, and an auxiliary fan 15 is arranged between any two adjacent, the bottom in the sludge drying chamber is provided with a plurality of main fans 16, the heat pump system comprises a heat recovery-evaporator 10, a water pan is arranged below the heat recovery-evaporator 10, a gas-liquid separator 22 is arranged between the heat recovery-evaporator 10 and a compressor 11, the compressor 11 is connected with a condenser assembly, the condenser assembly is connected with a heat exchanger 14, the gas-liquid separator 22, a liquid storage tank 23 and a thermal expansion valve 24 are sequentially arranged between the heat exchanger 14 and the heat recovery-evaporator 10, the temperature of air circulating in the sludge drying chamber is 40-65 ℃, the lower the drying temperature is, the less organic odor volatilized from sludge is, and the lower the possibility of secondary pollution to the environment is.
In a specific embodiment of the present invention, the material distributor 2 comprises a pair of crushing rollers, a pair of mud making rollers and a pair of mud scraping knives below the mud making rollers, the dewatered sludge enters the crushing rollers through the feeding hopper 1 to be crushed, and then is pressed into the mud making rollers by the blades on the crushing rollers, the sludge forms a strip shape in the grooves of the mud making rollers, and is cut into non-adhesive strip-shaped sludge under the action of the mud scraping plates below the mud making rollers.
In one embodiment of the present invention, the regenerator-evaporator comprises an evaporator 18 and a regenerator, the regenerator comprises a regenerator cold end 25 and a regenerator hot end 19, the evaporator 18 is arranged between the regenerator cold end 25 and the regenerator hot end 19, the cold end 25 of the heat regenerator is connected with the hot end 19 of the heat regenerator through two water pipes, one water pipe is provided with a water pump 20, the other water pipe is provided with an intermediate heat exchanger 21, the evaporator 18 is connected to the gas-liquid separator 22 and the thermostatic expansion valve 24, the condenser assembly comprises a first condenser 12 and a second condenser 13, the first condenser 12 and the second condenser 13 are inclined at an angle of 40-45, the installation mode can ensure the heat exchange area of the heat exchanger in the same space to be maximized, and the overall drying efficiency of the equipment is improved.
The utility model discloses a concrete embodiment, medium among the regenerator is one of water, oil, ethylene glycol, and the medium provides circulating power through the pump, carries out heat exchange through middle heat exchanger 21 and outside cold source simultaneously, improves its dehumidification ability, and this kind of regenerator that adopts the power supply has maintainable characteristics, and general heat pipe regenerator generally can not maintain, can only change, and in addition, medium in the regenerator carries out the heat exchange with outside cold source at backheating in-process rethread middle heat exchanger 21, increases the cold volume of medium in the regenerator, and then increases the dehumidification volume of integral type backheat-evaporimeter.
The utility model discloses a specific embodiment, air filter includes first order filter 8 and second filter 9, second filter 9 locates first order filter 8 top is arranged in filtering the dust that carries in the circulated air, prevents that the dust from getting into heat pump system's heat exchanger, and then influences heat transfer effect.
In a specific embodiment of the utility model, the middle part is equipped with first layer conveying mesh belt 3 and second layer conveying mesh belt 5 in the sludge drying chamber, the end of first layer conveying mesh belt 3 with be equipped with water conservancy diversion chute 4 between the head end of second layer conveying mesh belt 5, the end below of second layer conveying mesh belt 5 is equipped with discharging device, water conservancy diversion chute 4's effect lies in avoiding first layer conveying mesh belt 3's mud to shift to second layer conveying mesh belt 5 in-process because of the height is too high, causes fashioned mud to beat to warp, the gas permeability worsens, and then influences the heat exchange effect of mud and wind.
In a specific embodiment of the present invention, the discharging device comprises a discharging chute 6 and a conveying screw 7.
In a specific embodiment of the utility model, the bottom is equipped with two main blowers 16 in the sludge drying chamber, two be equipped with two flow guide baffle 17 between the main blower 16, two flow guide baffle 17 respectively with sludge drying chamber bottom contained angle is 50-55, two flow guide baffle 17 upper edge is being close the lower floor the place of conveying mesh belt bottom is crossing, because main blower 16's amount of wind is great, sets up the air guide baffle and can avoid the wind that two main blowers 16 produced to disturb each other, causes the regional mud of interference to receive the amount of wind unstable, influences the whole mummification effect of mud.
When specifically using, according to mud behind the dehydration of mud low temperature heat pump mummification equipment get into cloth machine 2 through advancing mud bucket 1, cloth machine 2 is with massive mud broken shaping, form each other adhesion, the better strip mud of gas permeability falls into on the first layer conveying mesh belt 3 in the sludge drying box, mud is along with first layer conveying mesh belt 3's rotation, move to the end from first layer conveying mesh belt 3's head end, fall into the head end of second floor conveying mesh belt 5 through mud water conservancy diversion chute 4 again, first layer conveying mesh belt 3 continues the pivoted in-process, mud moves to the end from 5 head ends of second floor conveying mesh belt, and fall into mud blown down tank 6 from its end, the mud conveying screw 7 in the rethread blown down tank 6 is carried to the sludge drying box outside.
In the process of moving the sludge on the mesh belt, the main fan 16 sends dry hot air dehumidified and heated by the heat pump system into the drying box body, sequentially passes through the second layer of conveying mesh belt 5 and the first layer of conveying mesh belt 3 from bottom to top, and the air and the sludge on the two layers of mesh belts carry out damp-heat exchange to absorb the moisture in the sludge, a part of the air after passing through the first layer of conveying mesh belt 3 continues to pass upwards through a first-stage primary filter 8 and a second-stage intermediate filter 9 of the dust removal device for dust removal, the other part of the air passes through a second auxiliary condenser 13 through an air duct under the action of an auxiliary fan 15, is secondarily heated by the second auxiliary condenser 13 and then is conveyed to the lower part of the first layer of conveying mesh belt 3 by the auxiliary fan 15, mixed with the wind passing through the second layer of conveying mesh belt 5, and then passes through the first layer of conveying mesh belt 3 again to absorb the sludge moisture on the first layer of conveying mesh belt 3 again.
Two diversion baffle plates 17 are arranged at the bottom of a sludge drying box body of the sludge low-temperature heat pump drying equipment, two main fans 16 are adopted to supply air to the sludge drying box body simultaneously, the air quantity of the main fans 16 is large, in order to prevent the mutual interference and hedging of the air of the two fans, the sludge on a mesh belt at the middle part is affected by uneven air, the drying effect is affected, the two diversion baffle plates 17 are arranged, the included angles of 50-55 degrees are formed between the two baffle plates and the bottom of the drying box body, and the upper edges of the baffle plates are intersected at a place close to the bottom of a lower mesh belt.
The air passing through the dust remover enters the heat pump system box body through the air duct, firstly passes through the integrated heat recovery-evaporator 10 arranged at the air duct opening above the heat pump system box body, the air is dehumidified and preheated at the air duct opening, condensed water generated by dehumidification is collected by a water receiving disc below the integrated heat recovery-evaporator 10 and then is discharged to the outside of the drying equipment through a pipeline, the dehumidified air continuously passes through the air duct between the plate heat exchanger 14 and the compressor 11 of the heat pump system to reach the first main condenser 12 of the heat pump system, the air is heated at the first main condenser 12 to form dry hot air, and then the dry hot air is sent into the sludge drying box body for circulation under the action of the main fan 16.
The sludge low-temperature heat pump drying equipment comprises two independent heat pump systems, each heat pump system comprises two compressors 11 which are connected in parallel, each compressor 11 can be of a scroll type or a plunger type, each compressor 11 is respectively connected with a first main condenser 12 and a second auxiliary condenser 13 through refrigerant pipelines, the two condensers respectively carry out primary heating and secondary heating on air passing through the outsides of the condensers, gaseous refrigerants in the condensers are changed into liquid states after being absorbed by the air, outlet pipelines of the two condensers are combined into a whole path and then connected with a plate type heat exchanger 14, the refrigerants which are not completely liquefied are further condensed into liquid states through cooling water, the liquid refrigerants sequentially enter a gas-liquid separator 22 and a liquid storage tank 23 through the refrigerant pipelines, the liquid refrigerants are changed into two-phase states of low temperature and low pressure through the action of a thermal expansion valve 24 and then enter an evaporator 18, and wet and hot air passing through the outsides of the evaporator 18 exchanges, the damp and hot air is changed into cold and dry air, and the refrigerant is evaporated to be changed into low-temperature and low-pressure superheated gas; the gaseous refrigerant is discharged from the evaporator 18, and then enters the heat exchange type gas-liquid separator 22, and after separation and heating, the gaseous refrigerant enters the compressor 11 to be circulated next time.
The sludge low-temperature heat pump drying equipment in the utility model makes the evaporator 18 and the cold end 25 of the heat regenerator, the hot end 19 of the heat regenerator into an integrated heat regenerator-evaporator 10, but the refrigerant pipeline is only connected with the evaporator 18, the cold end 25 of the heat regenerator and the hot end 19 of the heat regenerator are connected through a water pipe, a water pump 20 is arranged on the water pipe to provide motion for the water to circulate between the cold end 25 of the heat regenerator and the hot end 19 of the heat regenerator, the medium in the heat regenerator can also be oil or glycol, the water in the cold end 25 of the heat regenerator exchanges heat with the humid hot air passing through the outside of the heat regenerator, the humid hot air is precooled, the water is heated, the heated water is sent into the hot end 19 of the heat regenerator through the water pump 20, the water in the hot end 19 of the heat regenerator exchanges heat with the cold dry air passing through the outside of the heat regenerator, the cold dry air is preheated, the water is cooled, the cooled water enters the intermediate heat exchanger 21, the water entering, so as to ensure that the temperature of the water entering the cold end 25 of the regenerator is low enough and improve the heat exchange effect of the cold end 25 of the regenerator.
The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by the teaching of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as the present invention, fall within the protection scope of the present invention.
Claims (8)
1. The utility model provides a mud low temperature heat pump mummification equipment, includes the sludge drying chamber, its characterized in that: the sludge drying chamber is characterized in that a sludge feeding and distributing device is arranged above the side of the sludge drying chamber, a heat pump system chamber is arranged on one side of the sludge drying chamber, a heat pump system is arranged in the heat pump system chamber, the sludge feeding and distributing device comprises a sludge feeding hopper (1) and a distributing machine (2) which are arranged from top to bottom, the sludge drying chamber is provided with a sludge inlet, the distributing machine (2) is connected with the sludge inlet, the bottom of the sludge drying chamber is provided with a sludge outlet, the upper part in the sludge drying chamber is provided with an air filtering device, the middle part in the sludge drying chamber is provided with a plurality of layers of conveying mesh belts, the lowest layer of conveying mesh belt is provided with a discharging device below, the discharging device is connected with the sludge outlet, an auxiliary fan (15) is arranged between any two adjacent layers of conveying mesh belts, the bottom in the sludge drying chamber is provided, a water pan is arranged below the heat recovery evaporator (10), a gas-liquid separator (22) is arranged between the heat recovery evaporator (10) and the compressor (11), the compressor (11) is connected with a condenser assembly, the condenser assembly is connected with a heat exchanger (14), and the gas-liquid separator (22), a liquid storage tank (23) and a thermal expansion valve (24) are sequentially arranged between the heat exchanger (14) and the heat recovery evaporator (10).
2. The sludge low-temperature heat pump drying equipment according to claim 1, characterized in that: the distributing machine (2) comprises a pair of crushing rollers, a pair of mud making rollers and a pair of mud scraping knives below the mud making rollers.
3. The sludge low-temperature heat pump drying equipment according to claim 1, characterized in that: the heat recovery-evaporator comprises an evaporator (18) and a heat regenerator, the heat regenerator comprises a heat regenerator cold end (25) and a heat regenerator hot end (19), the evaporator (18) is arranged between the heat regenerator cold end (25) and the heat regenerator hot end (19), the heat regenerator cold end (25) and the heat regenerator hot end (19) are connected through two water pipes, one water pipe is provided with a water pump (20), the other water pipe is provided with an intermediate heat exchanger (21), the evaporator (18) is respectively connected with a gas-liquid separator (22) and a thermal expansion valve (24), the condenser assembly comprises a first condenser (12) and a second condenser (13), and the inclination angles of the first condenser (12) and the second condenser (13) are 40-45 degrees.
4. The sludge low-temperature heat pump drying equipment according to claim 3, characterized in that: the medium in the heat regenerator is one of water, oil and glycol.
5. The sludge low-temperature heat pump drying equipment according to claim 1, characterized in that: the air filtering device comprises a first-stage filter (8) and a second-stage filter (9), wherein the second-stage filter (9) is arranged above the first-stage filter (8).
6. The sludge low-temperature heat pump drying equipment according to claim 1, characterized in that: the sludge drying chamber is internally provided with a first layer conveying mesh belt (3) and a second layer conveying mesh belt (5) in the middle, the tail end of the first layer conveying mesh belt (3) and the head end of the second layer conveying mesh belt (5) are provided with a diversion chute (4), and the tail end of the second layer conveying mesh belt (5) is provided with a discharging device.
7. The sludge low-temperature heat pump drying equipment as claimed in claim 1 or 6, wherein: the discharging device comprises a discharging groove (6) and a conveying screw machine (7).
8. The sludge low-temperature heat pump drying equipment according to claim 1, characterized in that: two main fans (16) are arranged at the bottom in the sludge drying chamber, two flow guide partition plates (17) are arranged between the two main fans (16), included angles between the two flow guide partition plates (17) and the bottom of the sludge drying chamber are 50-55 degrees, and upper edges of the two flow guide partition plates (17) are intersected at a position close to the bottom of the lowest conveying mesh belt.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920629926.5U CN210176709U (en) | 2019-05-06 | 2019-05-06 | Sludge low-temperature heat pump drying equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920629926.5U CN210176709U (en) | 2019-05-06 | 2019-05-06 | Sludge low-temperature heat pump drying equipment |
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| CN210176709U true CN210176709U (en) | 2020-03-24 |
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| CN201920629926.5U Active CN210176709U (en) | 2019-05-06 | 2019-05-06 | Sludge low-temperature heat pump drying equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110127984A (en) * | 2019-05-06 | 2019-08-16 | 四川天润德环境工程有限公司 | A kind of sludge at low temperature heat pump drying equipment |
| CN113185077A (en) * | 2020-05-12 | 2021-07-30 | 广东吉康环境系统科技有限公司 | Low-temperature sludge drying device for discharging, cooling and heat recovery and control method thereof |
-
2019
- 2019-05-06 CN CN201920629926.5U patent/CN210176709U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110127984A (en) * | 2019-05-06 | 2019-08-16 | 四川天润德环境工程有限公司 | A kind of sludge at low temperature heat pump drying equipment |
| CN110127984B (en) * | 2019-05-06 | 2024-02-13 | 四川天润德环境工程有限公司 | Sludge low-temperature heat pump drying equipment |
| CN113185077A (en) * | 2020-05-12 | 2021-07-30 | 广东吉康环境系统科技有限公司 | Low-temperature sludge drying device for discharging, cooling and heat recovery and control method thereof |
| CN113185077B (en) * | 2020-05-12 | 2021-12-14 | 广东吉康环境系统科技有限公司 | Low-temperature sludge drying device for discharging, cooling and heat recovery and control method thereof |
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