CN107270696A - One kind is based on CO2The drying system of Trans-critical cycle heat pump cycle - Google Patents
One kind is based on CO2The drying system of Trans-critical cycle heat pump cycle Download PDFInfo
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- CN107270696A CN107270696A CN201710487744.4A CN201710487744A CN107270696A CN 107270696 A CN107270696 A CN 107270696A CN 201710487744 A CN201710487744 A CN 201710487744A CN 107270696 A CN107270696 A CN 107270696A
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- air
- hothouse
- refrigerant
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- evaporator
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
- F26B21/002—Drying-air generating units, e.g. movable, independent of drying enclosure heating the drying air indirectly, i.e. using a heat exchanger
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Drying Of Solid Materials (AREA)
Abstract
CO is based on the present invention relates to heat pump drying technology field, more particularly to one kind2The drying system of Trans-critical cycle heat pump cycle.The system includes hothouse, refrigerant loop and dried medium loop：Compressor, gas cooler, regenerator, choke valve and evaporator are sequentially provided with the refrigerant loop；The dried medium loop is provided with the gas cooler, the hothouse, heat exchanger and the evaporator, heat exchanger includes the first pipeline and second pipe exchanged heat mutually, the air outlet slit of gas cooler connects the air intake of hothouse, the air outlet slit of hothouse connects the entrance of first pipeline, the air intake of the outlet evaporator of first pipeline, the air outlet slit of evaporator connects the entrance of the second pipe, the air intake of gas cooler described in the outlet of second pipe.Present invention section uses trans critical cycle, can adapt to the drying operating mode under wide temperature range, used heat is recycled, efficiency is substantially increased.
Description
Technical field
CO is based on the present invention relates to heat pump drying technology field, more particularly to one kind2The dry system of Trans-critical cycle heat pump cycle
System.
Background technology
The main energy loss of drying process is the discharge of humid air, and the drying of material is widely used in industrial and agricultural production
And the processing technology of huge energy consumption, according to statistics, the energy consumed in most of developed country's dry materials account for national total energy
The 7%~15% of consumption, and the thermal efficiency is only 25%~50%.Since early 1970s energy crisis, countries in the world are equal
Substantial amounts of research is expanded to the power-saving technology for drying processing, heat pump drying is exactly a kind of new section produced under this background
Can dry technology.
Heat pump can effectively reclaim latent heat and sensible heat in humid air, significantly improve energy utilization rate.Mutually more conventional air-flow
Dry, heat pump drying technology has energy resource consumption is few, drying cost is low, environmental pollution is small, drying quality is high, applied widely etc.
Advantage, its excellent energy-saving effect is proved by various experimental studies both domestic and external.
But, the refrigeration working medium (refrigerant) that existing Analysis of Heat Pump Drying System is used is generally HFCs and HCFCs, and freon is over the ground
Ball atmospheric ozone has destruction, and a large amount of uses can cause global warming, have a strong impact on ball ecological environment；Moreover, existing
Some refrigeration working medium Acclimation temperature narrow scopes, more difficult meet dries requirement under worst hot case, can be reduced under worst cold case
The performance of heat pump, can even not run normally, thus seriously hinder popularization and application of the heat pump in high temperature and cold district.
The content of the invention
(1) technical problem to be solved
Above mentioned problem is directed to, the present invention proposes a kind of based on CO2The drying system of Trans-critical cycle heat pump cycle, it is with CO2
For refrigerant, the drying operating mode under wide temperature range is can adapt to, and effective recovery has been carried out to used heat, system energy is improved
Effect.
(2) technical scheme
In order to solve the above-mentioned technical problem, it is based on CO the invention provides one kind2The drying system of Trans-critical cycle heat pump cycle,
It includes：
Hothouse for holding material to be dried；
With CO2For the refrigerant loop of refrigerant, be sequentially provided with the refrigerant loop compressor, gas cooler,
Throttling arrangement (being preferably choke valve) and evaporator；And,
Dried medium loop by dried medium of air, the dried medium loop provided with the gas cooler,
The hothouse, heat exchanger and the evaporator, the heat exchanger include the first pipeline and second pipe exchanged heat mutually, described
The air outlet slit of gas cooler connects the air intake of the hothouse, the air outlet slit connection described first of the hothouse
The entrance of pipeline, the air intake of evaporator described in the outlet of first pipeline, the air outlet slit of the evaporator connects
Lead to the entrance of the second pipe, the air intake of gas cooler described in the outlet of the second pipe.
Further, it is additionally provided with bypass line on the dried medium loop, is changed described in bypass line one end connection
Pipeline between the air outlet slit of hot device and hothouse, the other end connect the heat exchanger and gas cooler air intake it
Between pipeline.
Further, the bypass line is provided with the first volume damper.
Further, the pipeline between the air outlet slit and heat exchanger of the hothouse is provided with dust arrester, with to dry
The air of dry room outflow is filtered, and removes particulate matter.
Further, blower fan is additionally provided with the dried medium loop, for providing dried medium for system and being described
The circulation of dried medium provides power.
Further, regenerator, the refrigerant outlet connection of the gas cooler are additionally provided with the refrigerant loop
The supercooling entrance of the regenerator, the refrigerant inlet of throttling arrangement, the steaming described in the supercooling outlet of the regenerator
The refrigerant outlet for sending out device connects the overheat entrance of the regenerator, compressor described in the overheat outlet of the regenerator
Refrigerant inlet.
Further, the pipeline between the air outlet slit of the evaporator and the entrance of second pipe is provided with the second air quantity
Regulating valve and the 3rd volume damper, second volume damper are used to introduce fresh air, and the air quantity of introducing is regulated and controled；
3rd volume damper is used to discharge return air, and the air quantity of discharge is regulated and controled.Pass through the second volume damper, the 3rd
The regulation and control of volume damper, the achievable closed type of the present invention and semi open model isolated operation or mixed running, it is ensured that dried
Hot wet stability in journey.
Further, the bottom of the evaporator is provided with the water storage disk for being used for storing condensed water, and the water storage disk is provided with
Drainpipe.
Further, first pipeline is multiple, and multiple first pipelines be arranged in parallel；And/or, described second
Pipeline is multiple, and multiple second pipes be arranged in parallel.
Further, the drying system also includes control device, and the control device includes being used to control refrigerant loop
With the controlling switch in dried medium loop and the temperature sensor, humidity sensor and the control that are connected respectively with the controlling switch
Panel processed, the temperature sensor and humidity sensor may be contained within the hothouse, the controlling switch respectively with refrigeration
Agent loop and the electrical connection of dried medium loop.
Further, the periphery of the drying system is provided with insulation material；It is preferred that, the insulation material is protected for polyurethane
Warm plate.
(3) beneficial effect
The above-mentioned technical proposal of the present invention has the advantages that：
1st, drying system of the invention is with CO2For refrigerant, using air as dried medium, energy-conserving and environment-protective, and using across facing
Boundary is circulated, and can adapt to the drying operating mode under wide temperature range.
The present invention is provided with heat exchanger, and heat exchanger includes the first pipeline and second pipe crossed one another, the air of hothouse
The entrance of the pipeline of outlet first, the air intake of the outlet evaporator of the first pipeline, the air outlet slit of evaporator connects
The entrance of logical second pipe, the air intake of the outlet gas cooler of second pipe；Into in the pipeline of heat exchanger first
Air with used heat exchanged heat with entering the Cryogenic air in second pipe, after heat exchange, the air that second pipe flows out
Due to absorbing used heat so that temperature is raised, then is back to hothouse, i.e. used heat through gas cooler and is recycled,
So as to improve efficiency.
2nd, the present invention is provided with bypass line, and the air with used heat flowed out from hothouse can enter via bypass line
Enter gas cooler, then be back to hothouse, so that used heat has obtained further recycling, therefore further increase energy
Effect.
3rd, the present invention is provided with regenerator, and before being throttled to refrigerant, refrigerant is subcooled using regenerator
Processing, can prevent liquid refrigerant from occurring flash gas in pipeline, refrigerant is fully liquefied, and improve refrigerant in evaporation
Caloric receptivity (i.e. refrigerating capacity) in device gasification, thus improve operational efficiency；Before refrigerant enters compressor, to refrigeration
Agent carries out Overheating Treatment, refrigerant is fully gasified, and compressor can be avoided " liquid hammer " phenomenon occur.
Brief description of the drawings
Fig. 1 is the structural representation of drying system described in the embodiment of the present invention；
Fig. 2 is structural representation of the drying system under closed type flow described in the embodiment of the present invention；
Fig. 3 is the structural representation of evaporator described in the embodiment of the present invention；
Fig. 4 is the structural representation of heat exchanger described in the embodiment of the present invention；
Wherein, 1：Compressor；2：Gas cooler；3：Choke valve；4：Evaporator；5：Regenerator；6：Hothouse；7：Heat exchange
Device；8：Second volume damper；9：3rd volume damper；10：First volume damper；11：Bypass line；13：Dedusting is filled
Put；14：Water storage disk；15：Drainpipe；16：First pipeline of heat exchanger；17：The second pipe of heat exchanger；
Filled arrows：Represent the flow direction of refrigerant；
Hollow arrow：Represent the flow direction of dried medium.
Embodiment
Embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples.Following examples are used for
Illustrate the present invention, but can not be used for limiting the scope of the present invention.
In the description of the invention, unless otherwise indicated, " multiple " are meant that two or more；Term " top
The orientation or position relationship of the instruction such as end ", " bottom " are, based on orientation shown in the drawings or position relationship, to be for only for ease of and retouch
State the present invention and simplify description, rather than indicate or imply that the device or element of meaning there must be specific orientation, with specific
Azimuth configuration and operation, therefore be not considered as limiting the invention.In addition, term " first ", " second ", " the 3rd " etc.
It is only used for describing purpose, and it is not intended that indicating or implying relative importance.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary.For this
For the those of ordinary skill in field, concrete condition can be regarded and understand the concrete meaning of above-mentioned term in the present invention.
As shown in Figure 1 to 4, present embodiments provide a kind of based on CO2The drying system of Trans-critical cycle heat pump cycle, its with
CO2For refrigerant, using air as dried medium, including hothouse 6, refrigerant loop, dried medium loop and control device.
The periphery of drying system is provided with insulation material, and insulation material is polyurethane thermal insulation board.The air intake of hothouse 6 and
The air outlet slit of hothouse 6 is oppositely arranged on the two ends of hothouse 6.
Compressor 1, gas cooler 2, choke valve 3 and evaporator 4, compressor 1, gas are sequentially provided with refrigerant loop
Connected mode between cooler 2, choke valve 3 and evaporator 4 uses this area conventional technical means.On the refrigerant loop also
Provided with regenerator 5, the refrigerant outlet of gas cooler 2 connects the supercooling entrance of regenerator 5, and the supercooling outlet of regenerator 5 connects
The refrigerant inlet of logical choke valve 3, the refrigerant outlet of evaporator 4 connects the overheat entrance of regenerator 5, the overheat of regenerator 5
The refrigerant inlet of outlet compressor 1.
Dried medium loop is provided with above-mentioned gas cooler 2, above-mentioned hothouse 6, heat exchanger 7 and above-mentioned evaporator 4, changes
Hot device 7 includes the first pipeline 16 and second pipe 17 (referring to Fig. 4) for crossing one another and exchanging heat, and the air of gas cooler 2 goes out
The air intake of mouthful connection hothouse 6, the air outlet slit of hothouse 6 connects the entrance of the first pipeline 16, and the first pipeline 16 goes out
The air intake of mouthful connection evaporator 4, the air outlet slit of evaporator 4 connects the entrance of second pipe 17, and second pipe 17 goes out
The air intake of mouth connection gas cooler 2.
Further, be additionally provided with bypass line 11 on the dried medium loop, the one end of bypass line 11 connection heat exchanger 7 with
Pipeline between the air outlet slit of hothouse 6, the pipe between other end connection heat exchanger 7 and the air intake of gas cooler 2
Road.Bypass line 11 is provided with the first volume damper 10, to regulate and control return air amount.The air outlet slit of hothouse 6 and heat exchanger 7 it
Between pipeline be provided with dust arrester 13, to be filtered to the air that hothouse 6 flow out, removing particulate matter.Dried medium is returned
Blower fan is additionally provided with road, for providing dried medium for system and providing power for the circulation of dried medium.
Pipeline between the air outlet slit of evaporator 4 and the entrance of second pipe 17 provided with the second volume damper 8 and
3rd volume damper 9, the second volume damper 8 is used to introduce fresh air, and the air quantity of introducing is regulated and controled；3rd air quantity is adjusted
Section valve 9 is used to discharge return air, and the air quantity of discharge is regulated and controled.The bottom of evaporator 4 is provided with the storage for being used for storing condensed water
Water pond 14, water storage disk 14 is provided with drainpipe 15.
In the present embodiment, the first pipeline 16 of heat exchanger 7 is multiple, and multiple first pipelines 16 be arranged in parallel；Second pipe
Road 17 is similarly multiple, and multiple second pipes 17 be arranged in parallel；Moreover, the first pipeline 16 and the square crossing of second pipe 17.
Control device include being used for the controlling switch for controlling refrigerant loop and dried medium loop and respectively with control
Temperature sensor, humidity sensor and the PLC control panels of connection are switched, temperature sensor and humidity sensor may be contained within doing
In dry room 6, controlling switch is electrically connected with refrigerant loop and dried medium loop respectively.Control device passes through PLC control panels
Drying mode under settable different temperatures, temperature sensor and humidity sensor are respectively induced the air themperature in hothouse 6
And air humidity, the parameter value sensed is then sent to controlling switch, controlling switch sends instruction control refrigerant and returned again
Road and the operating condition in dried medium loop.Control program is provided with PLC control panels, writing for associated control procedures is used
General knowledge known in this field is completed.In the operation of whole system, the air quantity of blower fan and the start and stop of source pump compressor 1 or frequency conversion
Manipulated by control device.
To describe the course of work of the drying system in detail, the present embodiment is to refrigerant loop and the work in dried medium loop
Make process to illustrate respectively, it is as follows：
(1) refrigerant loop：Start compressor 1, compressor 1 discharges the gaseous refrigerant (CO of HTHP2Gas) (this
When refrigerant it is in a supercritical state), the gaseous refrigerant of HTHP enters gas cooler 2 and heat release wherein, cold
Solidifying, afterwards, refrigerant, which enters in regenerator 5, carried out cold treatment, and to ensure that refrigerant is changed into liquid, liquid refrigerant is through throttling
After the reducing pressure by regulating flow of valve 3, absorb heat, evaporate into evaporator 4, afterwards, refrigerant enters regenerator 5 and carries out Overheating Treatment, with true
Protect refrigerant and be changed into gaseous state, gaseous refrigerant is compressed again into compressor 1, then carries out next circulation.
(2) dried medium loop：By material to be dried loaded in hothouse 6, start blower fan, air is inputted gas by blower fan
Cooler 2, now air exchanged heat with gas cooler 2, air absorb the liberated heat of gas cooler 2 after temperature liter
Height, but the water capacity of air is constant, air intake of the air through hothouse 6 of high temperature low humidity enter in hothouse 6 with it is to be dried
Material carries out hot and humid area, and air heat release simultaneously absorbs the moisture in material, and air of the air through hothouse 6 after cooling moisture absorption goes out
Mouth discharge, and the removal of impurities of removing dust device 13, the air after removal of impurities have following several whereabouts：
1. the first volume damper 10, is opened, and controls return air amount, the air part after removal of impurities is entered through bypass line 11
Enter gas cooler 2, be reused for drying；
2., the air after removal of impurities is while bypass line 11 are entered, and another part enters heat exchanger 7, enters back into evaporation
Device 4, the cool-down dehumidification in evaporator 4 becomes the dry air of low temperature, and the dry air has following two whereabouts again：
A, the 3rd volume damper 9 of opening, its exterior is immediately discharged to by the dry air；
B, close the 3rd volume damper 9, the second pipe 17 of the dry air inflow heat exchanger 7, and with the first pipeline
New round waste gas in 16 is exchanged heat；Waste gas after heat exchange in the first pipeline 16 is cooled, and one is entered subsequently into evaporator 4
Walk cool-down dehumidification；The air in second pipe 17 after heat exchange can be mixed with the waste gas from bypass line 11, and mixing is empty
Gas enters gas cooler 2 and carries out heat temperature raising, reaches and hothouse 6 is discharged into after target operating condition, and hot and humid area is carried out to material；
While above-mentioned a and/or b is carried out, the second volume damper 8 can be opened or closed (respectively such as Fig. 1 and Fig. 2
It is shown), when opening the second volume damper 8, fresh air can be introduced from external environment condition, the fresh air of introducing can directly and bypass line
Waste gas mixing in 11, is mixed, mixing air enters with the waste gas in bypass line 11 again after can also being exchanged heat in heat exchanger 7
Enter gas cooler 2 and carry out heat temperature raising, reach and hothouse 6 is discharged into after target operating condition, hot and humid area is carried out to material；
In addition, referring to Fig. 3, above-mentioned operating mode is during progress, and the moisture separated out from evaporator 4 is temporarily stored in water storage disk 14
In, then drained into through drainpipe 15 outside drying system.
In summary, the drying system of the present embodiment is with CO2For refrigerant, using air as dried medium, energy-conserving and environment-protective, and
Using trans critical cycle, the drying operating mode under wide temperature range can adapt to, it is ensured that different dry materials and different
Drying mode, has widened popularization and application of the heat pump in high temperature and cold district.
The drying system is provided with heat exchanger, and used heat is recycled by heat exchanger, substantially increases efficiency.Should
Drying system is provided with bypass line, and it is cold that the air with used heat flowed out from hothouse can enter gas via bypass line
But device, then be back to hothouse, so that used heat has obtained further recycling, therefore further increases efficiency.Dry system
The peripheral structure of system uses insulation material, and the regulation of the air quantity of bypass line, the input power of compressor and exhaust air rate can
Realize the drying operating mode of different humitures.
The drying system is provided with regenerator, before being throttled to refrigerant, and refrigerant was carried out using regenerator
Cold treatment, can prevent liquid refrigerant from occurring flash gas in pipeline, refrigerant is fully liquefied, and improve refrigerant in steaming
The caloric receptivity (i.e. refrigerating capacity) in device gasification is sent out, thus improves operational efficiency；Before refrigerant enters compressor, to system
Cryogen carries out Overheating Treatment, refrigerant is fully gasified, and compressor can be avoided " liquid hammer " phenomenon occur, the work of compressor is improved
Make condition.
Embodiments of the invention are provided for the sake of example and description, and are not exhaustively or by this to send out
It is bright to be limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Choosing
Select and describe embodiment and be more preferably to illustrate the principle and practical application of the present invention, and make one of ordinary skill in the art
It will be appreciated that the present invention is so as to design the various embodiments with various modifications suitable for special-purpose.
Claims (10)
1. one kind is based on CO2The drying system of Trans-critical cycle heat pump cycle, including hothouse, it is characterised in that also include：
With CO2For the refrigerant loop of refrigerant, compressor, gas cooler, throttling dress are sequentially provided with the refrigerant loop
Put and evaporator；And,
Dried medium loop by dried medium of air, the dried medium loop is provided with the gas cooler, described
Hothouse, heat exchanger and the evaporator, the heat exchanger include the first pipeline and second pipe exchanged heat mutually, the gas
The air outlet slit of cooler connects the air intake of the hothouse, and the air outlet slit of the hothouse connects first pipeline
Entrance, the air intake of evaporator described in the outlet of first pipeline, the evaporator air outlet slit connection institute
The entrance of second pipe is stated, the air intake of gas cooler described in the outlet of the second pipe.
2. according to claim 1 be based on CO2The drying system of Trans-critical cycle heat pump cycle, it is characterised in that dry Jie
Bypass line is additionally provided with matter loop, described bypass line one end is connected between the heat exchanger and the air outlet slit of hothouse
Pipeline, the other end connects the pipeline between the heat exchanger and the air intake of gas cooler.
3. according to claim 2 be based on CO2The drying system of Trans-critical cycle heat pump cycle, it is characterised in that the bypass pipe
Road is provided with the first volume damper.
4. according to claim 1 be based on CO2The drying system of Trans-critical cycle heat pump cycle, it is characterised in that the hothouse
Air outlet slit and heat exchanger between pipeline be provided with dust arrester.
5. according to claim 1 be based on CO2The drying system of Trans-critical cycle heat pump cycle, it is characterised in that dry Jie
Matter is additionally provided with blower fan on loop.
6. according to claim 1 be based on CO2The drying system of Trans-critical cycle heat pump cycle, it is characterised in that the refrigerant
Regenerator is additionally provided with loop, the refrigerant outlet of the gas cooler connects the supercooling entrance of the regenerator, described time
The refrigerant inlet of throttling arrangement described in the supercooling outlet of hot device, the refrigerant outlet of the evaporator connects the backheat
The overheat entrance of device, the refrigerant inlet of compressor described in the overheat outlet of the regenerator.
7. according to claim 1 be based on CO2The drying system of Trans-critical cycle heat pump cycle, it is characterised in that the evaporator
Air outlet slit and second pipe entrance between pipeline be provided with the second volume damper and the 3rd volume damper, it is described
Second volume damper is used to introduce fresh air, and the air quantity of introducing is regulated and controled, and the 3rd volume damper is used to discharge
Return air, and the air quantity of discharge is regulated and controled.
8. according to claim 1 be based on CO2The drying system of Trans-critical cycle heat pump cycle, it is characterised in that the evaporator
Bottom be provided with water storage disk, the water storage disk be provided with drainpipe.
9. according to claim 1 be based on CO2The drying system of Trans-critical cycle heat pump cycle, it is characterised in that first pipe
Road is multiple, and multiple first pipelines be arranged in parallel；And/or, the second pipe is multiple, and multiple second pipes
Road be arranged in parallel.
10. according to claim 1 be based on CO2The drying system of Trans-critical cycle heat pump cycle, it is characterised in that also including control
Device processed, the control device include being used for the controlling switch for controlling refrigerant loop and dried medium loop and respectively with institute
Temperature sensor, humidity sensor and the control panel of controlling switch connection are stated, the temperature sensor and humidity sensor are equal
It is arranged in the hothouse.
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| CN108043054A (en) * | 2017-12-29 | 2018-05-18 | 浙江镭弘激光科技有限公司 | A kind of energy-saving, environment-friendly and high-efficiency evaporating kettle |
| CN108168225A (en) * | 2017-12-28 | 2018-06-15 | 广东申菱环境系统股份有限公司 | A kind of bypass type Analysis of Heat Pump Drying System |
| CN108266877A (en) * | 2017-12-20 | 2018-07-10 | 同济大学 | The air-exhaust heat-recovery fresh air handling air-conditioner set of carbon dioxide trans-critical cycle |
| CN109813095A (en) * | 2019-03-18 | 2019-05-28 | 青岛大学 | Segmented closely closes Analysis of Heat Pump Drying System |
| CN111750658A (en) * | 2020-07-29 | 2020-10-09 | 青岛达能环保设备股份有限公司 | Material drying system based on transcritical carbon dioxide heat pump |
| CN113203279A (en) * | 2021-03-30 | 2021-08-03 | 上海如能节能环保科技有限公司 | Closed-circuit high-temperature heat pump drying method for expanded feed |
| WO2022057794A1 (en) * | 2020-09-15 | 2022-03-24 | 张勇 | Efficient multi-stage drying system |
| CN114489176A (en) * | 2021-12-31 | 2022-05-13 | 北京京仪自动化装备技术股份有限公司 | Coupling temperature control system and method |
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| CN108266877A (en) * | 2017-12-20 | 2018-07-10 | 同济大学 | The air-exhaust heat-recovery fresh air handling air-conditioner set of carbon dioxide trans-critical cycle |
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| CN108168225B (en) * | 2017-12-28 | 2023-10-20 | 广东申菱环境系统股份有限公司 | Shunting type heat pump drying system |
| CN108043054A (en) * | 2017-12-29 | 2018-05-18 | 浙江镭弘激光科技有限公司 | A kind of energy-saving, environment-friendly and high-efficiency evaporating kettle |
| CN109813095A (en) * | 2019-03-18 | 2019-05-28 | 青岛大学 | Segmented closely closes Analysis of Heat Pump Drying System |
| CN111750658A (en) * | 2020-07-29 | 2020-10-09 | 青岛达能环保设备股份有限公司 | Material drying system based on transcritical carbon dioxide heat pump |
| WO2022057794A1 (en) * | 2020-09-15 | 2022-03-24 | 张勇 | Efficient multi-stage drying system |
| CN113203279A (en) * | 2021-03-30 | 2021-08-03 | 上海如能节能环保科技有限公司 | Closed-circuit high-temperature heat pump drying method for expanded feed |
| CN114489176A (en) * | 2021-12-31 | 2022-05-13 | 北京京仪自动化装备技术股份有限公司 | Coupling temperature control system and method |
| CN114489176B (en) * | 2021-12-31 | 2023-04-07 | 北京京仪自动化装备技术股份有限公司 | Coupling temperature control system and method |
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