CN113173687B - Cold and hot source type sludge low-temperature drying system - Google Patents
Cold and hot source type sludge low-temperature drying system Download PDFInfo
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- CN113173687B CN113173687B CN202110458080.5A CN202110458080A CN113173687B CN 113173687 B CN113173687 B CN 113173687B CN 202110458080 A CN202110458080 A CN 202110458080A CN 113173687 B CN113173687 B CN 113173687B
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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
- F25B30/06—Heat pumps characterised by the source of low potential heat
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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
- C02F2303/00—Specific treatment goals
- C02F2303/10—Energy recovery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention discloses a cold and hot source type sludge low-temperature drying system, which comprises a drying module and a cold and hot source for supplying cold and heat to the drying module, wherein the drying module comprises a plurality of sludge dryers, the sludge dryers are used for drying sludge, the cold and hot source comprises a plurality of water source heat pump units and an energy supply circulation module, the water source heat pump units generate cold energy and heat energy, the energy supply circulation module is used for supplying the cold energy and the heat energy generated by the water source heat pump units to the sludge dryers, and the sludge dryers and the water source heat pump units are connected in parallel through the energy supply circulation module. The sludge drying efficiency is improved by adopting a plurality of sludge dryers, the heat source is concentrated by adopting the concentrated cold heat source, the water source heat pump unit is arranged in a concentrated mode, heat required by drying is provided, and when a plurality of units are operated in parallel, cold and heat sources can be utilized to intensively adjust the cooling and heating, so that the system is more energy-saving and the cost is saved.
Description
Technical Field
The invention relates to sludge treatment, in particular to a cold and hot source type sludge low-temperature drying system.
Background
Sludge is a product of sewage treatment and water treatment, the generation amount of the sludge is greatly increased along with the great increase of the sewage treatment capacity, the sludge contains a large amount of water, most of the sludge is simply dehydrated to 80% by machines such as a plate type or bag type filter press or a centrifuge and is sent to the outside for treatment, and if the treatment is insufficient, serious secondary pollution is caused, so that the treatment of the sludge has very important significance. In the process of treating the sludge, the sludge is required to be treated in the modes of recovery, extraction, composting, incineration, landfill, carbonization and the like after the steps of concentration, dehydration, drying and the like, so that secondary pollution caused by the sludge is reduced, and some components in the sludge are recycled.
In the prior art, a sludge drying heat pump system is often adopted for drying sludge, but the existing sludge drying heat pump system is required to be matched with a heat pump unit in a dryer, heat is taken from return air, the temperature is reduced and the humidity is removed, and then the heat pump unit is used for heating dehumidified dry cold air for drying the sludge, so that the efficiency is improved when a plurality of dryers are required for drying the sludge, and each dryer is provided with the heat pump unit, so that the cost is increased and the energy is not saved.
Disclosure of Invention
The invention aims at: in view of the above drawbacks, the present invention provides a cold and heat source type sludge low-temperature drying system with a plurality of dryers.
The technical scheme is as follows: in order to solve the problems, the invention discloses a cold and heat source type sludge low-temperature drying system, which comprises a drying module and a cold and heat source for supplying cold and heat to the drying module, wherein the drying module comprises a plurality of sludge dryers, the sludge dryers are used for drying sludge, the cold and heat source comprises a plurality of water source heat pump units and an energy supply circulation module, the water source heat pump units generate cold energy and heat energy, the energy supply circulation module is used for supplying the cold energy and heat energy generated by the water source heat pump units to the sludge dryers, and the sludge dryers and the water source heat pump units are connected in parallel through the energy supply circulation module.
The beneficial effects are that: compared with the prior art, the invention has the remarkable advantages that a plurality of sludge dryers are adopted to improve the sludge drying efficiency, a concentrated cold heat source is adopted, a water source heat pump unit is arranged in a concentrated mode, heat and cold required by drying are provided, when a plurality of units are operated in parallel, the cold and heat source stations can be utilized to regulate the cold and heat supply in a concentrated mode, and the whole drying system is more energy-saving and saves the operation cost.
Further, the sludge dryer comprises an air supply device, a waste heat recovery device, a heating coil, a drying mud bin and a cooling and dehumidifying coil, wherein the air supply device is used for supplying dehumidified air, the waste heat recovery device is used for absorbing sensible heat in high-humidity return air and preheating air supplied by the air supply device to obtain preheated air, the heating coil is used for heating the preheated air to obtain high-temperature drying air, the drying mud bin is used for drying sludge with high water content through the high-temperature drying air and obtaining high-humidity return air, and the cooling and dehumidifying coil is used for dehumidifying the high-humidity return air cooled by the waste heat recovery device.
Further, the energy supply circulation module comprises a heat supply circulation module and a cold supply circulation module, the heating coils of the sludge dryers are connected in series through the heat supply circulation module, and the cold supply dehumidification coils of the sludge dryers are connected in series through the cold supply circulation module.
Further, the water source heat pump unit comprises a heat supply outlet, a heat return inlet, a cold supply outlet and a cold return inlet, the heating coil comprises a hot water inlet and a hot water outlet, the cold supply dehumidifying coil comprises a cold water inlet and a cold water outlet, the heat supply circulation module comprises a heat supply water supply pipeline, a heat supply water return pipeline and a cooling tower, the cooling tower comprises a water inlet and a water outlet, and the cold supply circulation module comprises a cold supply water supply pipeline and a cold supply water return pipeline; one end of the heat supply and water supply pipeline is provided with a plurality of branches which are respectively connected with heat supply outlets of a plurality of water source heat pump units, the other end of the heat supply and water supply pipeline is provided with a plurality of branches which are respectively connected with hot water inlets of a plurality of sludge dryers, one end of the heat supply and water return pipeline is provided with a plurality of branches which are respectively connected with hot water outlets of a plurality of sludge dryers, the other end of the heat supply and water return pipeline is connected with a water inlet of a cooling tower, and a water outlet of the cooling tower is connected with a backheating inlet of a plurality of water source heat pump units; the cold supply water supply pipeline one end sets up a plurality of branches and supplies cold exit linkage with a plurality of water source heat pump unit respectively, and the cold supply water supply pipeline other end sets up a plurality of branches and respectively with the cold water entry linkage of a plurality of mud dryers, cold supply return pipeline one end sets up a plurality of branches and respectively with the cold water exit linkage of a plurality of mud dryers, cold supply return pipeline other end sets up a plurality of branches and respectively with the back cold entry linkage of a plurality of water source heat pump unit.
Further, the cooling circulation module further comprises a water supplementing tank, the water supplementing tank comprises a water supplementing inlet, a water supplementing outlet and a sewage draining outlet, the water supplementing inlet is used for supplementing water into the water supplementing tank, the water supplementing outlet is connected with a cooling return pipeline, the water supplementing outlet is used for supplementing water in the water supplementing tank into the cooling return pipeline, and the sewage draining outlet is used for draining sewage in the water supplementing tank.
Further, the dry mud bin comprises a feed inlet, an extrusion molding machine, a drying chamber and a discharge outlet, wherein the feed inlet is used for enabling the high-water-content sludge to enter the sludge dryer, the extrusion molding machine is used for extruding the high-water-content sludge into strips, the drying chamber is used for drying the strip-shaped sludge through high-temperature drying air, and the discharge outlet is used for discharging the dried sludge.
Further, the drying chamber comprises a first rotating mesh belt and a second rotating mesh belt, wherein the first mesh belt is used for receiving the strip-shaped sludge with high water content and conveying the strip-shaped sludge to the second mesh belt, and the second mesh belt is used for receiving the strip-shaped sludge and conveying the strip-shaped sludge to the discharge port.
Further, the waste heat recovery device comprises a heat pipe heat exchanger, the heat pipe heat exchanger comprises an evaporation section and a condensation section, the evaporation section is used for absorbing sensible heat in the high-humidity return air, and the condensation section is used for preheating air sent out by the air supply device to obtain preheated air.
Further, the air supply device comprises a fresh air port, the fresh air port is provided with a temperature and humidity sensor, the temperature and humidity sensor is used for detecting the temperature and humidity of the external air of the sludge dryer, and the fresh air port is used for conveying the external air of the sludge dryer into the air supply device.
Further, the sludge dryer further comprises a moisture exhaust port, wherein the moisture exhaust port is arranged below the cooling and dehumidifying coil and is used for exhausting high-humidity return air.
Drawings
Fig. 1 is a schematic structural diagram of a cold and heat source type sludge low-temperature drying system of the invention.
Fig. 2 is a schematic view of the structure of the sludge dryer in the patent of the present invention.
Description of the embodiments
As shown in fig. 1, a cold and hot source type sludge low-temperature drying system of the invention patent comprises a drying module and a cold and hot source, wherein the drying module comprises a plurality of sludge dryers 18, the cold and hot source comprises a plurality of water source heat pump units 21 and an energy supply circulation module, the sludge dryer 18 dries sludge, the water source heat pump units 21 generate cold energy and heat energy, the energy supply circulation module supplies the cold energy and the heat energy generated by the water source heat pump units 21 to the sludge dryer 18, the energy supply circulation module comprises a heat supply circulation module and a cold supply circulation module, heating coils 5 of the sludge dryers 18 are connected in series through the heat supply circulation module, and cold supply dehumidification coils 16 of the sludge dryers 18 are connected in series through the cold supply circulation module. The water source heat pump unit 21 includes a compressor, an oil separator, a condenser, an electronic expansion valve, an evaporator, and the like, which are connected to form a loop cycle.
The sludge dryer 18 comprises a box body 2, an air supply device, a waste heat recovery device, a heating coil 5, a dry sludge bin and a cooling and dehumidifying coil 16; the air supply device comprises a fresh air port 1 and an air blower 3, wherein the air blower 3 supplies dehumidified air into the sludge dryer 18, the dehumidified air comprises air after the interior of the sludge dryer 18 is circularly dehumidified and fresh air which is drier outside the sludge dryer 18 and enters from the fresh air port 1, the fresh air port 1 is provided with a temperature and humidity sensor for detecting the temperature and humidity of air outside the sludge dryer 18, and part of fresh air outside the sludge dryer 18 is regulated to participate in circulation.
The waste heat recovery device comprises a heat pipe heat exchanger, the heat pipe heat exchanger comprises an evaporation section 14 and a condensation section 4, the evaporation section 14 is positioned at the lower end of the condensation section 4, the evaporation section 14 is positioned at the air inlet side of a cooling dehumidifying coil 16, the condensation section 4 is positioned at the air inlet of a heating coil, dehumidified air fed by a blower 3 passes through the condensation section 4 of the heat pipe heat exchanger, gaseous working medium in the condensation section 4 is condensed into liquid working medium to release heat, the dehumidified air is preheated, and the liquid working medium flows back to the evaporation section 14 of the heat pipe heat exchanger; the return air after drying the sludge passes through the evaporation section 14 of the heat pipe heat exchanger, and the liquid working medium in the evaporation section 14 absorbs the sensible heat of the return air, boils and vaporizes to become a gaseous working medium, and the gaseous working medium rises to the condensation section 4, so that circulation is realized. The heat pipe exchanger absorbs sensible heat of return air and preheats dehumidified air, so that energy can be further saved.
The dehumidification air sent by the blower 3 is preheated through the condensing section 4 of the heat pipe exchanger to obtain preheated air, the preheated air reaches the heating coil 5, the heating coil 5 heats the preheated air to obtain high-temperature drying air, the high-temperature drying air enters the drying mud bin, the high-temperature drying air dries sludge with high water content in the drying mud bin, and high-temperature high-humidity dust-containing return air is obtained, the high-temperature high-humidity dust-containing return air passes through the filtering device 13, the filtering device 13 simply filters dust to the high-temperature high-humidity dust-containing return air to obtain high-temperature high-humidity return air, the filtering device 13 is detachable, the high-temperature high-humidity return air is cooled through the evaporating section 14 of the heat pipe exchanger, the cooled high-humidity return air is dehumidified through the cooling dehumidifying coil 16, and the dehumidified return air is sent out through the blower 3.
The heating coil 5 comprises a hot water inlet and a hot water outlet, the cold supply dehumidifying coil 16 comprises a cold water inlet and a cold water outlet, the water source heat pump unit 21 comprises a heat supply outlet, a heat return inlet, a cold supply outlet and a cold return inlet, the heat supply circulation module comprises a heat supply water supply pipeline 20, a heat supply water return pipeline 19 and a cooling tower 23, the cooling tower 23 comprises a water inlet and a water outlet, and the cold supply circulation module comprises a cold supply water supply pipeline 33 and a cold supply water return pipeline 32.
One end of the heat supply and water supply pipeline 20 is provided with a plurality of branches which are respectively connected with heat supply outlets of a plurality of water source heat pump units 21, the other end of the heat supply and water supply pipeline 20 is provided with a plurality of branches which are respectively connected with hot water inlets of a plurality of sludge dryers 18, the water source heat pump units 21 supply hot water to the heating coil 5 through the heat supply and water supply pipeline 20, and heat sources are provided for the sludge dryers 18 for heating dry air; one end of the heat supply and return water pipeline 19 is provided with a plurality of branches which are respectively connected with hot water outlets of a plurality of sludge dryers 18, the other end of the heat supply and return water pipeline 19 is connected with a water inlet of a cooling tower 23, after the heating coil 5 heats dry air, water in the heating coil 5 flows out from the hot water outlets and enters the heat supply and return water pipeline 19, heat supply and return water in the heat supply and return water pipeline 19 is cooled by the cooling tower 23 to radiate heat to the outside, a water outlet of the cooling tower 23 is connected with a heat return inlet of a plurality of water source heat pump units 21 through a heat supply circulating pump water inlet pipe 25, a heat supply circulating pump 26 is arranged on the heat supply circulating pump water inlet pipe 25, the cooling tower 23 is provided with a water supplementing port 24, water for supplementing the cooling tower 23 is recycled into the water source heat pump units 21 for heating, and the water source heat pump units 21 provide high-temperature hot water at 80 ℃. The cooling tower 23 may be an open cooling tower or a closed cooling tower, because the required heat dissipation capacity is not large, or may be naturally cooled by using ambient air by using a cooling air cabinet.
One end of the cold supply pipeline 33 is provided with a plurality of branches which are respectively connected with cold supply outlets of a plurality of water source heat pump units 21, the other end of the cold supply pipeline 33 is provided with a plurality of branches which are respectively connected with cold water inlets of a plurality of sludge dryers 18, the water source heat pump units 21 supply cold water to the cold supply dehumidification coil 16 through the cold supply pipeline 33, and the sludge dryers 18 supply cold sources for dehumidification of high-humidity return air; one end of a cold supply and return pipeline 32 is provided with a plurality of branches which are respectively connected with cold water outlets of a plurality of sludge dryers 18, the other end of the cold supply and return pipeline 32 is provided with a plurality of branches which are respectively connected with cold return inlets of a plurality of water source heat pump units 21 through a cold supply circulating pump 27, cold water dehumidified by a cold supply dehumidification coil 16 enters the cold supply and return pipeline 32, cold supply return water in the cold supply and return pipeline 32 is recycled to enter the water source heat pump units 21 for refrigeration, the cold supply and return pipeline 32 is also connected with a water supplementing tank 29, the water supplementing tank 29 comprises a water supplementing inlet 30, a water supplementing outlet and a sewage draining outlet 31, the water supplementing inlet 30 supplements water in the water supplementing tank 29, the water supplementing outlet is connected with the cold supply and return pipeline 32 through a cold supply constant pressure water supplementing pump 28, and the water supplementing outlet supplements water in the water supplementing tank 29 into the cold supply and return pipeline 32, and the sewage draining outlet 31 discharges sewage in the water supplementing tank 29.
The drying mud bin comprises a feed inlet 7, an extrusion molding machine 8, a drying chamber and a discharge outlet 10, wherein the drying chamber comprises a first mesh belt 9 and a second mesh belt 11 which rotate, in the embodiment, stainless steel mesh belts are adopted, high-water-content sludge firstly enters the sludge dryer through the feed inlet 7, then the high-water-content sludge is extruded into strips through the extrusion molding machine 8, the strips enter the first mesh belt 9, the first mesh belt 9 is positioned at a return air section 6, the first mesh belt 9 receives the high-water-content strips of sludge and is used for drying the strips of sludge through high-temperature drying wind, the first mesh belt 9 rotates, the strips of sludge are conveyed to the second mesh belt 11, the second mesh belt 11 is positioned at an air supply section 12, the second mesh belt 11 receives the strips of sludge and is dried again through the high-temperature drying wind, the second mesh belt 11 rotates, the dried strips of sludge are conveyed to the discharge outlet, the first mesh belt 9 and the second mesh belt 11 can rotate through adjusting the rotating speed according to the need, the second mesh belt 11 is positioned below the first mesh belt 9, and the strips of sludge falls down to the second mesh belt 11 through the first mesh belt 11.
The sludge dryer 18 supplies cold dehumidification coil 16 below still sets up moisture vent 15, water tray and outlet 17, and moisture vent 15 discharges the air of high humidity to the external world to reduce dehumidification load, further realize the energy-conservation of system. The water tray and the water outlet 17 are used for discharging water dehumidified in the dehumidified air.
When the temperature and humidity sensor detects that the temperature and humidity of the external fresh air are high temperature and low humidity, the fresh air port 1 of the sludge dryer 18 is opened, external air is introduced into the air supply device, and meanwhile, the moisture exhaust port 15 is automatically opened under the action of wind pressure, so that the high-humidity air is discharged to the outside and is exhausted to the ambient air.
Claims (6)
1. The cold and hot source type sludge low-temperature drying system comprises a drying module and a cold and hot source for supplying cold and heat to the drying module, and is characterized in that the drying module comprises a plurality of sludge dryers, the sludge dryers are used for drying sludge, the cold and hot source comprises a plurality of water source heat pump units and an energy supply circulation module, the water source heat pump units generate cold energy and heat energy, the energy supply circulation module is used for supplying the cold energy and the heat energy generated by the water source heat pump units to the sludge dryers, and the sludge dryers and the water source heat pump units are connected in parallel through the energy supply circulation module; the sludge dryer comprises an air supply device, a waste heat recovery device, a heating coil, a dry sludge bin and a cooling and dehumidifying coil, wherein the air supply device is used for supplying dehumidified air, the waste heat recovery device is used for absorbing sensible heat in high-humidity return air and preheating air supplied by the air supply device to obtain preheated air, the heating coil is used for heating the preheated air to obtain high-temperature dry air, the dry sludge bin is used for drying sludge with high water content through the high-temperature dry air and obtaining high-humidity return air, and the cooling and dehumidifying coil is used for dehumidifying the high-humidity return air cooled by the waste heat recovery device; the energy supply circulation module comprises a heat supply circulation module and a cold supply circulation module, heating coils of the sludge dryers are connected in series through the heat supply circulation module, and cold supply dehumidification coils of the sludge dryers are connected in series through the cold supply circulation module;
the water source heat pump unit comprises a heat supply outlet, a heat return inlet, a cold supply outlet and a cold return inlet, the heating coil comprises a hot water inlet and a hot water outlet, the cold supply dehumidifying coil comprises a cold water inlet and a cold water outlet, the heat supply circulation module comprises a heat supply water supply pipeline, a heat supply water return pipeline and a cooling tower, the cooling tower comprises a water inlet and a water outlet, and the cold supply circulation module comprises a cold supply water supply pipeline and a cold supply water return pipeline; one end of the heat supply and water supply pipeline is provided with a plurality of branches which are respectively connected with heat supply outlets of a plurality of water source heat pump units, the other end of the heat supply and water supply pipeline is provided with a plurality of branches which are respectively connected with hot water inlets of a plurality of sludge dryers, one end of the heat supply and water return pipeline is provided with a plurality of branches which are respectively connected with hot water outlets of a plurality of sludge dryers, the other end of the heat supply and water return pipeline is connected with a water inlet of a cooling tower, and a water outlet of the cooling tower is connected with a backheating inlet of a plurality of water source heat pump units; one end of the cold supply and water supply pipeline is provided with a plurality of branches which are respectively connected with cold supply outlets of the water source heat pump units, the other end of the cold supply and water supply pipeline is provided with a plurality of branches which are respectively connected with cold water inlets of the sludge dryers, one end of the cold supply and water return pipeline is provided with a plurality of branches which are respectively connected with cold water outlets of the sludge dryers, and the other end of the cold supply and water return pipeline is provided with a plurality of branches which are respectively connected with cold return inlets of the water source heat pump units;
the waste heat recovery device comprises a heat pipe heat exchanger, the heat pipe heat exchanger comprises an evaporation section and a condensation section, the evaporation section is used for absorbing sensible heat in high-humidity return air, and the condensation section is used for preheating air sent out by the air supply device to obtain preheated air.
2. The sludge low-temperature drying system of claim 1, wherein the cooling circulation module further comprises a water replenishing tank, the water replenishing tank comprises a water replenishing inlet, a water replenishing outlet and a sewage outlet, the water replenishing inlet is used for replenishing water into the water replenishing tank, the water replenishing outlet is connected with a cooling return water pipeline, the water replenishing outlet is used for replenishing water in the water replenishing tank into the cooling return water pipeline, and the sewage outlet is used for discharging sewage in the water replenishing tank.
3. The sludge low-temperature drying system according to claim 2, wherein the drying sludge bin comprises a feed inlet, an extrusion molding machine, a drying chamber and a discharge outlet, the feed inlet is used for enabling high-water-content sludge to enter the sludge dryer, the extrusion molding machine is used for extruding the high-water-content sludge into strips, the drying chamber is used for drying the strips of sludge through high-temperature drying wind, and the discharge outlet is used for discharging the dried sludge.
4. A sludge low temperature drying system according to claim 3 wherein the drying chamber comprises a rotating first and second mesh belt, the first mesh belt being adapted to receive high moisture content bar sludge and to transport the bar sludge to the second mesh belt, the second mesh belt being adapted to receive bar sludge and to transport the bar sludge to the discharge port.
5. The sludge low-temperature drying system according to claim 2, wherein the air supply device comprises a fresh air port, the fresh air port is provided with a temperature and humidity sensor, the temperature and humidity sensor is used for detecting the temperature and humidity of the air outside the sludge dryer, and the fresh air port is used for conveying the air outside the sludge dryer into the air supply device.
6. The sludge low temperature drying system of claim 2, wherein the sludge dryer further comprises a moisture removal vent disposed below the cooling and dehumidification coil for discharging high humidity return air.
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| CN202110458080.5A CN113173687B (en) | 2021-04-27 | 2021-04-27 | Cold and hot source type sludge low-temperature drying system |
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| CN202110458080.5A CN113173687B (en) | 2021-04-27 | 2021-04-27 | Cold and hot source type sludge low-temperature drying system |
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| CN205482159U (en) * | 2016-03-20 | 2016-08-17 | 戴传孝 | Novel high temperature heat pump mud drying -machine |
| CN110040934B (en) * | 2019-04-19 | 2024-04-09 | 松下制冷（大连）有限公司 | Sludge drying and dehumidifying system and method based on absorption heat pump |
| CN110255855B (en) * | 2019-07-19 | 2023-09-26 | 扬州大学 | Dual-cold-heat-source heat pump sludge low-temperature drying system with waste heat recovery function and application method thereof |
| CN111912211A (en) * | 2020-05-05 | 2020-11-10 | 同济大学 | Sludge heat pump drying system based on air treatment unit |
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