CN109405422A - A kind of vacuum environment heat pump drying system and its working method - Google Patents
A kind of vacuum environment heat pump drying system and its working method Download PDFInfo
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- CN109405422A CN109405422A CN201811459082.0A CN201811459082A CN109405422A CN 109405422 A CN109405422 A CN 109405422A CN 201811459082 A CN201811459082 A CN 201811459082A CN 109405422 A CN109405422 A CN 109405422A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/10—Heating arrangements using tubes or passages containing heated fluids, e.g. acting as radiative elements; Closed-loop systems
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Abstract
A kind of vacuum environment heat pump drying system, including vacuum environment dryer (9), it is characterised in that: a kind of vacuum environment heat pump drying system further includes hot water circulating pipeline, vacuum suction pipeline, medium circulation pipeline, circulating chilled water pipeline.Baking needed heat and cooling capacity are provided using heat pump circulating system, it is different from conventional heat pump system and heat is only provided, cooling capacity is provided separately by cooling tower or cooling-water machine, system provides hot water and cold water simultaneously, for the matching for keeping cooling capacity and heat, increase finned heat exchanger in condensation side, increases electric control valve on refrigerant pipeline, can be adjusted according to material state.In circulating chilled water pipeline, increase water side electric control valve, motor and double-tube heat exchanger flow proportional can be distributed according to material state.Vacuum environment dryer is vacuumized using vacuum pump, reduces moisture evaporation temperature, reduces evaporation institute's calorific requirement, reduces drying energy consumption.Overall process closure, without externally discharge, no pollution to the environment.
Description
Technical field
The present invention relates to the drying fields and heating and field of heat exchange in industry manufacture, more specifically to one
Kind vacuum environment heat pump drying system and its working method.
Background technique
With economic development, in order to improve the speed of production of material, facilitate material transportation, improve material save it is reliable
Property, drying technology gradually applies in the daily production of all trades and professions.The drying technology mainly used at present includes: coal-burning boiler
Drying, gas fired-boiler drying, steam drying, electric heating drying, and in order to reduce environmental pollution, energy utilization rate is improved, drop
Low routine use expense guarantees that system run all right surname, safety, heat pump techniques are just more and more used in drying industry.
Existing heat pump drying technology is carried out in normal pressure drying environment, and moisture evaporation side heat source quality in material
Higher, evaporation rate is faster, therefore needs heat pump high-grade heat source, is just able to satisfy the progress of drying course.Meanwhile for heat pump system
System, in order to meet higher supply air temperature, need to improve system condensing temperature, in the case, system heating efficiency is lower.
Summary of the invention
To solve the above problems, the present invention provides a kind of vacuum environment heat pump drying system and its working method, using true
Sky pump carries out vacuuming action to drying space, keeps drying space certain vacuum degree, to reduce water boiling temperature, improves water
Evaporation rate.Further, since water boiling temperature reduces, heat pump system institute heat supply air temperature is reduced, and reduces heat pump system condensation temperature
Degree improves system heating efficiency, reduces unit and runs power consumption, reaches energy conservation and consumption reduction effects.Technical solution is as follows.
A kind of vacuum environment heat pump drying system, including vacuum environment dryer 9, it is characterised in that: a kind of vacuum
Environmental heat pump drying system further includes hot water circulating pipeline, and the hot water circulating pipeline includes sequentially connected true with conduit ring-shaped
Altitude dryer 9, condensation side heat exchanger 2, hot water circulating pump 8.
Hot water heated material in vacuum environment dryer as a result, is heated in condensation side heat exchanger, completes hot water and follows
Ring.
A kind of vacuum environment heat pump drying system further includes vacuum suction pipeline, the vacuum suction pipeline include with
The sequentially connected vacuum environment dryer 1 of pipeline, vacuum pump 10, the set heat exchange of heat pipe 14, Condensed water collection driven with motor 28
Tank 16.
Vacuum environment can be manufactured in vacuum environment dryer as a result, be received after the vapor extraction that drying is formed is condensed
Collect to Condensed water collection tank.
A kind of vacuum environment heat pump drying system further includes medium circulation pipeline, the medium circulation pipeline include with
The sequentially connected gas-liquid separator 6 of conduit ring-shaped, compressor 1, condensation side heat exchanger 2, fluid reservoir 3, electric expansion valve 4, evaporation
Side heat exchanger 5.
Refrigerant can be pressurized within the compressor in the gaseous state as a result, and heat release is condensed in heat exchanger and is carried out to drying with water
Heating, the evaporation endothermic in evaporation side heat exchanger, completes refrigerant circulation in the liquid state.
A kind of vacuum environment heat pump drying system further includes circulating chilled water pipeline, the circulating chilled water pipeline include with
The sequentially connected evaporation side heat exchanger 5 of conduit ring-shaped, cold water circulation pump 12, set heat exchange of heat pipe 14.
As a result, cold water can set heat exchange of heat pipe in cooling vapor, cooled down in evaporation side heat exchanger, complete cold water
Circulation.
A kind of vacuum environment heat pump drying system according to the present invention, it is characterised in that: the medium circulation pipeline
In, the finned cooler 26 connected with pipeline, condensation side are provided between the medium side inlet and outlet of the condensation side heat exchanger 2
Medium side electric control valve 25 is provided on pipeline between the refrigerant side-entrance and the finned cooler of heat exchanger 2.
As a result, can a part of refrigerant of water conservancy diversion to finned cooler, according to the type and drying degree pair for being oven-dried material
Heat exchange amount in condensation side heat exchanger is adjusted.
A kind of vacuum environment heat pump drying system according to the present invention, it is characterised in that: the finned cooler
26 sides are provided with condensation fan 27.
It can be cooled down as a result, with condensation fan to finned cooler.
A kind of vacuum environment heat pump drying system according to the present invention, it is characterised in that: the circulating chilled water pipeline
In, it covers and is respectively arranged with No.1 triple valve 13 and No. two triple valves 15, the No.1 three on the pipeline of 14 2 side of heat exchange of heat pipe
It is provided with the motor cooling line for being connected to motor 28 between No. two triple valves 15 of port valve 13, is set on the motor cooling line
It is equipped with water side electric control valve 29.
The cold water in circulating chilled water can be used to cool down vaccum pump motor as a result, and according to the kind for being oven-dried material
Class dries degree and adjusts distribution motor and double-tube heat exchanger flow proportional, guarantees that vacuum pump condition is good.
A kind of vacuum environment heat pump drying system according to the present invention, it is characterised in that: the vacuum environment drying
Machine 9 includes being set to above pipeline, being oven-dried the lower case 18 of material 23 for loading and be set to above the lower case
Upper housing 17 has been provided with 5-10 steam motor-driven valve 20 at the top of the upper housing 17, in 18 side wall of lower case is formed with
Outer balance electric valve 22, the steam that covering steam motor-driven valve 20 is provided with above the upper housing 17 collect lid 19, the steam
It collects tops and is formed with the steam (vapor) outlet 21 for being connected to vacuum pump 10.
It as a result, can be closed inside guarantee vacuum environment dryer.
A kind of vacuum environment heat pump drying system according to the present invention, it is characterised in that: the hot water circulating pump 8
No.1 Y-filter 7 is provided with before water inlet.
It may filter that the impurity in pipeline as a result,.
A kind of vacuum environment heat pump drying system according to the present invention, it is characterised in that: the cold water circulation pump 12
Water inlet before be provided with No. two Y-filters 11.
It may filter that the impurity in pipeline as a result,.
A kind of vacuum environment heat pump drying system according to the present invention, it is characterised in that: the vacuum pump 10 is sieve
Thatch pump.
A kind of working method of vacuum environment heat pump drying system is suitable for a kind of vacuum environment heat pump of the present invention
Drying system, it is characterised in that: a kind of working method of vacuum environment heat pump drying system includes following workflow,
Medium circulation pipeline workflow: compressor 1 sucks the gaseous coolant of low-temp low-pressure in gas-liquid separator 6, gaseous state
Refrigerant enters pipeline after compression workmanship, and a part adjusts flow through electric control valve 25, into 2 import of condensation side heat exchanger；
Another part enters finned heat exchanger 26；Gaseous coolant carries out condensation cooling in condensation side heat exchanger 2, from gaseous state condense to
Heat is given out while liquid, the heat distributed is taken away by the hot water in hot water circulating pipeline；The gaseous coolant of another part
It condenses in finned heat exchanger, exchanges heat with 27 diversion airs of condensation fan；The liquid of condensed high temperature and pressure is cold
Matchmaker enters fluid reservoir 3；The liquid refrigerants of the high temperature and pressure flowed out from fluid reservoir throttles through electric expansion valve 4, becomes low-temp low-pressure
Mist state liquid coolant；The mist state liquid coolant of low-temp low-pressure enters evaporation side heat exchanger 5 and is evaporated heat absorption to become low temperature low
The gaseous coolant of pressure, while cold water is surveyed to circulating chilled water and is cooled down；The gaseous coolant of low-temp low-pressure enters gas-liquid separator 6,
Isolate the unvaporized liquid refrigerants of fraction；The gaseous coolant of low-temp low-pressure after separation is sucked by compressor 1 again, such as
This forms refrigerant circulation.
Vacuum suction pipeline workflow: vacuum pump 10 does manual work to 2 inside closed space of vacuum environment dryer, extraction unit
Divide air, so that 2 inside closed space of vacuum environment dryer generates certain vacuum degree；As material is oven-dried production in dryer
Unboiled water steam；The vapor of evaporation is persistently extracted out by vacuum pump 10, so that vacuum degree remains unchanged；The vapor of extraction is conveyed
It to double-tube heat exchanger 14, is cooled down by cold water, is changed into condensate and is stored in Condensed water collection tank 16 again.
Vacuum environment dryer internal work process: upper housing 17 and lower case 18 are closed；Internal and external equilibrium motor-driven valve 22 closes
It closes, steam motor-driven valve 20 is opened；Partial air is extracted out by vacuum pump 10, so that the evaporation rate of moisture content is accelerated compared to normal pressure；
Hot water flows through hot water line 24, heats to material 23 is oven-dried, is oven-dried 23 contained humidity of material and starts to evaporate；It is oven-dried material
The vapor of generation is collected to be collected in lid 19 in vapor, and is persistently taken away by vacuum pump 2 from steam (vapor) outlet 21；To drying materials
Afterwards, internal and external equilibrium motor-driven valve 22 is opened, and steam motor-driven valve 20 is closed, and balances inside cavity pressure and external pressure；Shell
After inside and outside air pressure balance, upper housing 17 is removed, the material 23 for drying completion is removed；It is put into and new is oven-dried material；It weighs according to this
It is multiple.
Hot water circulating pipeline workflow: hot water exchanges heat with condensation side heat exchanger 2, is added by the heat that refrigerant discharges
Heat；High-temperature-hot-water enters No.1 y-type filter 7 from the outlet of condensation side heat exchanger 2 outflow and filters；High-temperature-hot-water after filtering into
Enter the acting pressurization of hot water circulating pump 8；High-temperature-hot-water enters 9 lower part of vacuum environment dryer after hot water circulating pump acting pressurization
Hot water line 24, heat to material 23 is oven-dried；Hot water after the cooling of vacuum environment dryer 9 is again introduced into condensation
Side heat exchanger 2 is heated, and is thusly-formed hot water circuit.
Circulating chilled water pipeline workflow: cold water in evaporation side heat exchanger 5 with the mist state liquid coolant of low-temp low-pressure into
Row heat exchange, is cooled down；Low-temperature cold water enters No. two y-type filters 11 from the outlet of evaporation side heat exchanger 5 outflow and filters；Low-temperature cold water
After filtering, it pressurizes into cold water circulation pump 12；Low-temperature cold water is divided after cold water circulation pump acting pressurization by No.1 triple valve 13
For two parts, a part enters vaccum pump motor 28 and cools down to motor, and another part sleeve pipe heat exchanger 14 is to vacuum
The vapor of 10 extraction of pump cools down；Cold water after heating collects through No. two triple valves 15, is again introduced into evaporation side heat exchanger 5
It exchanges heat, is cooled down with refrigerant；It is thusly-formed circulating chilled water.
A kind of working method of vacuum environment heat pump drying system of the present invention, is characterized in that: a kind of vacuum
The working method of environmental heat pump drying system includes that drying course automatic control mode is as follows:
Material is oven-dried according to difference and presets temperature T, as the hot water inflow temperature T of condensation side heat exchanger 21When > T,
25 aperture of electric control valve reduces；Work as T1When < T, 25 aperture of electric control valve increases.
Condensation side heat exchanger 2 can be matched with 5 heat exchange amount of evaporation side heat exchanger as a result,.
As drying course carries out, it is oven-dried material moisture content evaporation capacity in the unit time and reduces, needed for double-tube heat exchanger 14
Heat exchange amount is reduced, and electronic expansion valve opening 4 reduces.
Refrigerating capacity and the required heat exchange of double-tube heat exchanger of evaporation side heat exchanger can be made flux matched as a result,.
Temperature T ' is preset according to different vacuum pump types, as 28 leaving water temperature T of vaccum pump motor2When > T ', water side
29 aperture of electric control valve reduces；Work as T2When < T ', electric control valve 29 aperture in water side increases.
Electric control valve 29 aperture in water side is according to 28 leaving water temperature T of vaccum pump motor as a result,2Automatic adjustment.
A kind of vacuum environment heat pump drying system and its working method provided according to the present invention, using heat pump circulating system
Baking needed heat and cooling capacity are provided, conventional heat pump system is different from and heat is only provided, cooling capacity is by cooling tower or cooling-water machine list
Solely providing, system provides hot water and cold water simultaneously, for the matching for keeping cooling capacity and heat, increase finned heat exchanger in condensation side,
Increase electric control valve on refrigerant pipeline, it can be according to different material, different drying courses, dynamic regulation.In cool water circulating pipe
Road increases water side electric control valve, according to drying stage difference, distributes motor and double-tube heat exchanger flow proportional, guarantees vacuum
Pump condition is good.Vacuum environment dryer is vacuumized using vacuum pump, reduces moisture evaporation temperature, reduces heat needed for evaporation
Amount reduces drying energy consumption；Meanwhile the reduction of evaporating temperature, evaporation rate is improved, while heat pump provides hot water, guarantees drying
Ambient temperature-stable.Space module is dried, is made of upper-lower casing, equilibrated valve, steam discharge valve, drying course is kept
Closure, negative pressure, drying are completed to flatten weighing apparatus inside and outside automatic.System overall process closure, without externally discharge, no pollution to the environment.
Detailed description of the invention
Fig. 1 is a kind of vacuum environment heat pump drying system structural schematic diagram of the present invention.
Fig. 2 is the structural schematic diagram of vacuum environment dryer.
Wherein 1 is compressor, and 2 be condensation side heat exchanger, and 3 be fluid reservoir, and 4 be electric expansion valve, and 5 exchange heat for evaporation side
Device, 6 be gas-liquid separator, and 7 be No.1 y-type filter, and 8 be hot water circulating pump, and 9 be vacuum environment dryer, and 10 be vacuum pump,
11 be No. two y-type filters, and 12 be cold water circulation pump, and 13 be No.1 triple valve, and 14 be double-tube heat exchanger, and 15 be No. two threeways
Valve, 16 be Condensed water collection tank, and 17 be upper housing, and 18 be lower case, and 19 collect lid for vapor, and 20 be steam motor-driven valve, and 21 are
Vapor outlet port, 22 be internal and external equilibrium motor-driven valve, and 23 is are oven-dried material, and 24 be hot water line, and 25 be medium side electric control valve,
26 be finned cooler, and 27 be condensation fan, and 28 be vaccum pump motor, and 29 be water side electric control valve.
Specific embodiment
A kind of vacuum environment heat pump drying system, including hot water circulating pipeline, vacuum suction pipeline, medium circulation pipeline,
Circulating chilled water pipeline
Hot water circulating pipeline includes with the sequentially connected vacuum environment dryer 9 of conduit ring-shaped, condensation side heat exchanger 2, Y shape
Filter 7, hot water circulating pump 8.
Vacuum suction pipeline includes with the sequentially connected vacuum environment dryer 1 of pipeline, the vacuum pump driven with motor 28
10, heat exchange of heat pipe 14, Condensed water collection tank 16 are covered.
Medium circulation pipeline includes with the sequentially connected gas-liquid separator 6 of conduit ring-shaped, compressor 1, condensation side heat exchanger
2, fluid reservoir 3, electric expansion valve 4, evaporation side heat exchanger 5, condensation side heat exchanger 2 medium side inlet and outlet between be provided with pipe
The finned cooler 26 of road connection, the pipeline between the refrigerant side-entrance and the finned cooler of condensation side heat exchanger 2
On be provided with medium side electric control valve 25.26 side of finned cooler is provided with condensation fan 27.
Circulating chilled water pipeline includes with conduit ring-shaped 5, No. two 13 cold water of Y-filter of sequentially connected evaporation side heat exchanger
Circulating pump 12, set heat exchange of heat pipe 14.It covers and is respectively arranged with No.1 triple valve 13 and two on the pipeline of 14 2 side of heat exchange of heat pipe
Number triple valve 15 is provided with the motor cooling line for being connected to motor 28 between No. two triple valves 15 of No.1 triple valve 13, electricity
Water side electric control valve 29 is provided on machine cooling line.
Vacuum environment dryer 9 includes being set to above pipeline, being oven-dried the lower case 18 of material 23 for loading and set
The upper housing 17 being placed in above lower case has been provided with 8 steam motor-driven valves 20 at the top of upper housing 17, and 18 side wall of lower case is formed
There is internal and external equilibrium motor-driven valve 22, the steam that covering steam motor-driven valve 20 is provided with above upper housing 17 collects lid 19, and steam is collected
Tops are formed with the steam (vapor) outlet 21 for being connected to vacuum pump 10.
A kind of working method of vacuum environment heat pump drying system, including following below scheme
Medium circulation pipeline workflow: compressor 1 sucks the gaseous coolant of low-temp low-pressure in gas-liquid separator 6, gaseous state
Refrigerant enters pipeline after compression workmanship, and a part adjusts flow through electric control valve 25, into 2 import of condensation side heat exchanger；
Another part enters finned heat exchanger 26；Gaseous coolant carries out condensation cooling in condensation side heat exchanger 2, from gaseous state condense to
Heat is given out while liquid, the heat distributed is taken away by the hot water in hot water circulating pipeline；The gaseous coolant of another part
It condenses in finned heat exchanger, exchanges heat with 27 diversion airs of condensation fan；The liquid of condensed high temperature and pressure is cold
Matchmaker enters fluid reservoir 3；The liquid refrigerants of the high temperature and pressure flowed out from fluid reservoir throttles through electric expansion valve 4, becomes low-temp low-pressure
Mist state liquid coolant；The mist state liquid coolant of low-temp low-pressure enters evaporation side heat exchanger 5 and is evaporated heat absorption to become low temperature low
The gaseous coolant of pressure, while cold water is surveyed to circulating chilled water and is cooled down；The gaseous coolant of low-temp low-pressure enters gas-liquid separator 6,
Isolate the unvaporized liquid refrigerants of fraction；The gaseous coolant of low-temp low-pressure after separation is sucked by compressor 1 again, such as
This forms refrigerant circulation.
Vacuum suction pipeline workflow: vacuum pump 10 does manual work to 2 inside closed space of vacuum environment dryer, extraction unit
Divide air, so that 2 inside closed space of vacuum environment dryer generates certain vacuum degree；As material is oven-dried production in dryer
Unboiled water steam；The vapor of evaporation is persistently extracted out by vacuum pump 10, so that vacuum degree remains unchanged；The vapor of extraction is conveyed
It to double-tube heat exchanger 14, is cooled down by cold water, is changed into condensate and is stored in Condensed water collection tank 16 again.
Vacuum environment dryer internal work process: upper housing 17 and lower case 18 are closed；Internal and external equilibrium motor-driven valve 22 closes
It closes, steam motor-driven valve 20 is opened；Partial air is extracted out by vacuum pump 10, so that the evaporation rate of moisture content is accelerated compared to normal pressure；
Hot water flows through hot water line 24, heats to material 23 is oven-dried, is oven-dried 23 contained humidity of material and starts to evaporate；It is oven-dried material
The vapor of generation is collected to be collected in lid 19 in vapor, and is persistently taken away by vacuum pump 2 from steam (vapor) outlet 21；To drying materials
Afterwards, internal and external equilibrium motor-driven valve 22 is opened, and steam motor-driven valve 20 is closed, and balances inside cavity pressure and external pressure；Shell
After inside and outside air pressure balance, upper housing 17 is removed, the material 23 for drying completion is removed；It is put into and new is oven-dried material；It weighs according to this
It is multiple.
Hot water circulating pipeline workflow: hot water exchanges heat with condensation side heat exchanger 2, is added by the heat that refrigerant discharges
Heat；High-temperature-hot-water enters No.1 y-type filter 7 from the outlet of condensation side heat exchanger 2 outflow and filters；High-temperature-hot-water after filtering into
Enter the acting pressurization of hot water circulating pump 8；High-temperature-hot-water enters 9 lower part of vacuum environment dryer after hot water circulating pump acting pressurization
Hot water line 24, heat to material 23 is oven-dried；Hot water after the cooling of vacuum environment dryer 9 is again introduced into condensation
Side heat exchanger 2 is heated, and is thusly-formed hot water circuit.
Circulating chilled water pipeline workflow: cold water in evaporation side heat exchanger 5 with the mist state liquid coolant of low-temp low-pressure into
Row heat exchange, is cooled down；Low-temperature cold water enters No. two y-type filters 11 from the outlet of evaporation side heat exchanger 5 outflow and filters；Low-temperature cold water
After filtering, it pressurizes into cold water circulation pump 12；Low-temperature cold water is divided after cold water circulation pump acting pressurization by No.1 triple valve 13
For two parts, a part enters vaccum pump motor 28 and cools down to motor, and another part sleeve pipe heat exchanger 14 is to vacuum
The vapor of 10 extraction of pump cools down；Cold water after heating collects through No. two triple valves 15, is again introduced into evaporation side heat exchanger 5
It exchanges heat, is cooled down with refrigerant；It is thusly-formed circulating chilled water.
Drying course automatic control mode is as follows:
Material is oven-dried according to difference and presets temperature T, as the hot water inflow temperature T of condensation side heat exchanger 21When > T,
25 aperture of electric control valve reduces；Work as T1When < T, 25 aperture of electric control valve increases.
As drying course carries out, it is oven-dried material moisture content evaporation capacity in the unit time and reduces, needed for double-tube heat exchanger 14
Heat exchange amount is reduced, and electronic expansion valve opening 4 reduces.
Temperature T ' is preset according to different vacuum pump types, as 28 leaving water temperature T of vaccum pump motor2When > T ', water side
29 aperture of electric control valve reduces；Work as T2When < T ', electric control valve 29 aperture in water side increases.
A kind of vacuum environment heat pump drying system and its working method provided according to the present invention, using heat pump circulating system
Baking needed heat and cooling capacity are provided, conventional heat pump system is different from and heat is only provided, cooling capacity is by cooling tower or cooling-water machine list
Solely providing, system provides hot water and cold water simultaneously, for the matching for keeping cooling capacity and heat, increase finned heat exchanger in condensation side,
Increase electric control valve on refrigerant pipeline, it can be according to different material, different drying courses, dynamic regulation.In cool water circulating pipe
Road increases water side electric control valve, according to drying stage difference, distributes motor and double-tube heat exchanger flow proportional, guarantees vacuum
Pump condition is good.Vacuum environment dryer is vacuumized using vacuum pump, reduces moisture evaporation temperature, reduces heat needed for evaporation
Amount reduces drying energy consumption；Meanwhile the reduction of evaporating temperature, evaporation rate is improved, while heat pump provides hot water, guarantees drying
Ambient temperature-stable.Space module is dried, is made of upper-lower casing, equilibrated valve, steam discharge valve, drying course is kept
Closure, negative pressure, drying are completed to flatten weighing apparatus inside and outside automatic.System overall process closure, without externally discharge, no pollution to the environment.
Claims (10)
1. a kind of vacuum environment heat pump drying system, including vacuum environment dryer (9), it is characterised in that: a kind of vacuum
Environmental heat pump drying system further includes hot water circulating pipeline, and the hot water circulating pipeline includes sequentially connected true with conduit ring-shaped
Altitude dryer (9), condensation side heat exchanger (2), hot water circulating pump 8；A kind of vacuum environment heat pump drying system also wraps
Vacuum suction pipeline is included, the vacuum suction pipeline includes with the sequentially connected vacuum environment dryer (1) of pipeline, with motor 28
Vacuum pump 10, the set heat exchange of heat pipe 14, Condensed water collection tank 16 of driving；A kind of vacuum environment heat pump drying system further includes
Medium circulation pipeline, the medium circulation pipeline include with the sequentially connected gas-liquid separator of conduit ring-shaped (6), compressor (1),
Condensation side heat exchanger (2), fluid reservoir (3), electric expansion valve (4), evaporation side heat exchanger (5)；A kind of vacuum environment heat pump
Drying system further includes circulating chilled water pipeline, and the circulating chilled water pipeline includes with the sequentially connected evaporation side heat exchange of conduit ring-shaped
Device (5), cold water circulation pump (12), set heat exchange of heat pipe (14).
2. a kind of vacuum environment heat pump drying system as described in claim 1, it is characterised in that: the medium circulation pipeline
In, it is provided with the finned cooler (26) connected with pipeline between the medium side inlet and outlet of the condensation side heat exchanger (2), it is cold
Medium side electric control valve is provided on pipeline between the refrigerant side-entrance and the finned cooler of solidifying side heat exchanger (2)
(25)。
3. a kind of vacuum environment heat pump drying system as claimed in claim 2, it is characterised in that: the finned cooler (26)
Side is provided with condensation fan (27).
4. a kind of vacuum environment heat pump drying system as described in claim 1, it is characterised in that: the circulating chilled water pipeline
In, it covers and is respectively arranged with No.1 triple valve (13) and No. two triple valves (15) on the pipeline of (14) two side of heat exchange of heat pipe, it is described
The motor cooling line for being connected to motor (28), the motor are provided between No. two triple valves (15) of No.1 triple valve (13)
Water side electric control valve (29) is provided on cooling line.
5. a kind of vacuum environment heat pump drying system as described in claim 1, it is characterised in that: the vacuum environment dryer
It (9) include being set to above pipeline, being oven-dried the lower case (18) of material (23) for loading and be set in the lower case
The upper housing (17) of side, upper housing (17) top have been provided with 5-10 steam motor-driven valve (20), the lower case (18)
Side wall is formed with internal and external equilibrium motor-driven valve (22), and the steam of covering steam motor-driven valve (20) is provided with above the upper housing (17)
Lid (19) is collected, the steam collects tops and is formed with the steam (vapor) outlet (21) for being connected to vacuum pump (10).
6. a kind of vacuum environment heat pump drying system as described in claim 1, it is characterised in that: the hot water circulating pump (8)
Water inlet before be provided with No.1 Y-filter (7).
7. a kind of vacuum environment heat pump drying system as described in claim 1, it is characterised in that: the cold water circulation pump (12)
Water inlet before be provided with No. two Y-filters (11).
8. a kind of vacuum environment heat pump drying system as described in claim 1, it is characterised in that: the vacuum pump 10 is Roots
Pump.
9. a kind of working method of vacuum environment heat pump drying system is suitable for a kind of vacuum environment heat pump of the present invention and dries
Dry systems, it is characterised in that: a kind of working method of vacuum environment heat pump drying system includes following workflow,
Medium circulation pipeline workflow: compressor 1 sucks the gaseous coolant of low-temp low-pressure in gas-liquid separator 6, gaseous coolant
Enter pipeline after compression workmanship, a part adjusts flow through electric control valve 25, into 2 import of condensation side heat exchanger；It is another
Part enters finned heat exchanger 26；Gaseous coolant carries out condensation cooling in condensation side heat exchanger 2, condenses from gaseous state to liquid
While give out heat, the heat distributed is taken away by the hot water in hot water circulating pipeline；The gaseous coolant of another part is in wing
It condenses in plate heat interchanger, exchanges heat with 27 diversion airs of condensation fan；The liquid refrigerants of condensed high temperature and pressure into
Enter fluid reservoir 3；The liquid refrigerants of the high temperature and pressure flowed out from fluid reservoir throttles through electric expansion valve 4, becomes the mist of low-temp low-pressure
State liquid coolant；The mist state liquid coolant of low-temp low-pressure enter evaporation side heat exchanger 5 be evaporated heat absorption become low-temp low-pressure
Gaseous coolant, while cold water is surveyed to circulating chilled water and is cooled down；The gaseous coolant of low-temp low-pressure enters gas-liquid separator 6, separation
The unvaporized liquid refrigerants of fraction out；The gaseous coolant of low-temp low-pressure after separation is sucked by compressor 1 again, such shape
At refrigerant circulation,
Vacuum suction pipeline workflow: vacuum pump 10 does manual work to 2 inside closed space of vacuum environment dryer, and extraction section is empty
Gas, so that 2 inside closed space of vacuum environment dryer generates certain vacuum degree；As material is oven-dried generation water in dryer
Steam；The vapor of evaporation is persistently extracted out by vacuum pump 10, so that vacuum degree remains unchanged；The vapor of extraction is transported to set
Heat exchange of heat pipe 14, is cooled down by cold water, is changed into condensate and is stored in Condensed water collection tank 16 again,
Vacuum environment dryer internal work process: upper housing 17 and lower case 18 are closed；Internal and external equilibrium motor-driven valve 22 is closed, and is steamed
Gas motor-driven valve 20 is opened；Partial air is extracted out by vacuum pump 10, so that the evaporation rate of moisture content is accelerated compared to normal pressure；Hot water stream
Through hot water line 24, is heated to material 23 is oven-dried, be oven-dried 23 contained humidity of material and start to evaporate；It is oven-dried material generation
Vapor is collected to be collected in lid 19 in vapor, and is persistently taken away by vacuum pump 2 from steam (vapor) outlet 21；It is interior after drying materials
Outer balance electric valve 22 is opened, and steam motor-driven valve 20 is closed, and balances inside cavity pressure and external pressure；Outer gas in shell
After flattening weighing apparatus, upper housing 17 is removed, the material 23 for drying completion is removed；It is put into and new is oven-dried material；It repeats according to this,
Hot water circulating pipeline workflow: hot water exchanges heat with condensation side heat exchanger 2, the heat discharged by refrigerant；It is high
Warm water enters No.1 y-type filter 7 from the outlet of condensation side heat exchanger 2 outflow and filters；High-temperature-hot-water after filtering enters heat
The acting pressurization of water-circulating pump 8；High-temperature-hot-water enters the hot water of 9 lower part of vacuum environment dryer after hot water circulating pump acting pressurization
Pipeline 24 is heated to material 23 is oven-dried；Hot water after the cooling of vacuum environment dryer 9 is again introduced into condensation side and changes
Hot device 2 is heated, and is thusly-formed hot water circuit,
Circulating chilled water pipeline workflow: cold water is changed in evaporation side heat exchanger 5 with the mist state liquid coolant of low-temp low-pressure
Heat is cooled down；Low-temperature cold water enters No. two y-type filters 11 from the outlet of evaporation side heat exchanger 5 outflow and filters；Low-temperature cold water passes through
After filter, pressurize into cold water circulation pump 12；It is two that low-temperature cold water, which is divided to after cold water circulation pump acting pressurization by No.1 triple valve 13,
Part, a part enter vaccum pump motor 28 and cool down to motor, and another part sleeve pipe heat exchanger 14 is to vacuum pump 10
The vapor of extraction cools down；Cold water after heating collects through No. two triple valves 15, be again introduced into evaporation side heat exchanger 5 with it is cold
Matchmaker's heat exchange, is cooled down；It is thusly-formed circulating chilled water.
10. a kind of working method of vacuum environment heat pump drying system as claimed in claim 9, it is characterised in that: described
A kind of working method of vacuum environment heat pump drying system includes that drying course automatic control mode is as follows:
Material is oven-dried according to difference and presets temperature T, as the hot water inflow temperature T of condensation side heat exchanger 21It is electronic when > T
25 aperture of regulating valve reduces；Work as T1When < T, 25 aperture of electric control valve increases,
As drying course carries out, the reduction of material moisture content evaporation capacity, heat exchange needed for double-tube heat exchanger 14 are oven-dried in the unit time
Amount is reduced, and electronic expansion valve opening 4 reduces,
Temperature T ' is preset according to different vacuum pump types, as 28 leaving water temperature T of vaccum pump motor2When > T ', water side electric adjustable
29 aperture of valve is saved to reduce；Work as T2When < T ', electric control valve 29 aperture in water side increases.
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| CN112460922A (en) * | 2020-11-30 | 2021-03-09 | 西安交通大学 | Negative pressure drying device and working method thereof |
| CN112944811A (en) * | 2021-04-02 | 2021-06-11 | 山东新华医疗器械股份有限公司 | Drying system for pulsating vacuum cleaning sterilizer |
| CN113546436A (en) * | 2021-08-18 | 2021-10-26 | 深圳市蓝石环保科技有限公司 | Vacuum system, control method and equipment of vacuum system and evaporation treatment system |
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