CN107687759A - A kind of Multi-layer belt type drying system in parallel based on two-stage heat pump - Google Patents

A kind of Multi-layer belt type drying system in parallel based on two-stage heat pump Download PDF

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Publication number
CN107687759A
CN107687759A CN201710674955.9A CN201710674955A CN107687759A CN 107687759 A CN107687759 A CN 107687759A CN 201710674955 A CN201710674955 A CN 201710674955A CN 107687759 A CN107687759 A CN 107687759A
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CN
China
Prior art keywords
air
heat pump
hothouse
belt type
circulating line
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Granted
Application number
CN201710674955.9A
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Chinese (zh)
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CN107687759B (en
Inventor
苑亚
杨鲁伟
张振涛
魏娟
肖波
董鹏
游韶玮
毛祥
谢诚
李博
张冲
李伟钊
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Technical Institute of Physics and Chemistry of CAS
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Technical Institute of Physics and Chemistry of CAS
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Priority to CN201710674955.9A priority Critical patent/CN107687759B/en
Publication of CN107687759A publication Critical patent/CN107687759A/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/001Drying-air generating units, e.g. movable, independent of drying enclosure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B30/00Heat pumps
    • F25B30/02Heat pumps of the compression type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B49/00Arrangement or mounting of control or safety devices
    • F25B49/02Arrangement or mounting of control or safety devices for compression type machines, plant or systems

Abstract

The present invention provides a kind of Multi-layer belt type drying system in parallel based on two-stage heat pump, including:Hothouse and heat pump cycle subsystem;The bottom of hothouse is provided with air inlet, top is provided with air outlet;Multi-layer network band is located in hothouse;Heat pump cycle subsystem includes multiple circulating lines and multiple heat pump units parallel with one another;Any heat pump unit includes evaporator, first order compressor, fluid reservoir, high stage compressor, condenser, second level choke valve and the first order choke valve for forming independent circulation circuit;The evaporator and condenser of any heat pump unit are positioned in any circulating line;The both ends of circulating line are connected with air inlet and air outlet respectively.A kind of Multi-layer belt type drying system in parallel based on two-stage heat pump provided by the invention, by using multiple heat pump units heat pump cycle subsystem in parallel, by air by common cool-down dehumidification and common heating, solve for the warm and humid difference of return air it is larger when, Multi-layer belt type drying system is difficult to the problem of satisfaction requires.

Description

A kind of Multi-layer belt type drying system in parallel based on two-stage heat pump
Technical field
The present invention relates to technical field of drying, is done more particularly, to a kind of Multi-layer belt type in parallel based on two-stage heat pump Drying system.
Background technology
At present, Multi-layer belt type drying system is industrially widely used.Multi-layer belt type drying system has drying Speed is fast, takes up an area less, advantages of simple structure and simple, right for the drying of the materials such as the preferable sheet of gas permeability, strip, graininess It is especially suitable in the high drying heat sensitive material of the moisture content such as dehydrated vegetables, the prepared slices of Chinese crude drugs, catalyst.
The heating and dehumidifying system, generally use heat pump, heater etc. of existing Multi-layer belt type drying system.Wherein, Heat pump, typically use single-stage heat pump.The performance of single-stage heat pump is larger by such environmental effects such as humitures, special The performance of heat pump is not relatively low at low ambient temperatures, even being capable of not normal operation.System is dried using the Multi-layer belt type of single-stage heat pump System, it is larger for the warm and humid difference of return air, and when supplying the warm and humid difference of return air larger, single-stage heat pump is difficult to meet to dry requirement.In addition, to change The efficiency of single-stage heat pump under kind low temperature environment, single-stage heat pump typically uses closed type operational mode, in closed type running The wet imbalance problem of heat be present in Multi-layer belt type drying system.
The content of the invention
The present invention in order to overcome existing for existing Multi-layer belt type drying system for the warm and humid difference of return air it is larger when be difficult to meet It is required that the problem of, there is provided a kind of Multi-layer belt type drying system in parallel based on two-stage heat pump.
The present invention provides a kind of Multi-layer belt type drying system, including:Hothouse and heat pump cycle subsystem;The hothouse Bottom be provided with several air inlets, top and be provided with several air outlets;Multi-layer network band is located in the hothouse, lower floor The input of transmission net band accepts the output end of the adjacent transmission net band in upper strata;The heat pump cycle subsystem includes multiple circulation pipes Road and multiple heat pump units parallel with one another;For any heat pump unit, including form independent circulation circuit evaporator, First order compressor, fluid reservoir, high stage compressor, condenser, second level choke valve and first order choke valve;The evaporator It is positioned over condenser in any circulating line;The air inlet with the hothouse and the air-out respectively of the both ends of the circulating line Mouth connection.
Preferably, the both ends of the circulating line are connected further bag with the air inlet and air outlet of the hothouse respectively Include:The first end of one circulating line is connected with an air outlet of the hothouse, or circulating line First end is connected with multiple air outlets of the hothouse, or the first end of multiple circulating lines and the one of the hothouse Individual air outlet connection;Also, the second end of a circulating line is connected with an air inlet of the hothouse, or one Second end of the circulating line is connected with multiple air inlets of the hothouse, or the second end of multiple circulating lines with The air inlet connection of the hothouse..
Preferably, any circulating line includes moist chamber and heating chamber;It is described to remove for any circulating line Moist chamber is connected with the air outlet;The evaporator of any heat pump unit is positioned in the moist chamber;The heating chamber with The air inlet connection;The condenser of any heat pump unit is positioned in the heating chamber.
Preferably, the circulating line also includes fresh wind port and/or exhaust outlet;The fresh wind port be located at the moist chamber and Between heating chamber, the heating chamber is closed on;The exhaust outlet closes on the dehumidifying between the moist chamber and heating chamber Room.
Preferably, the fresh wind port is provided with new air-valve.
Preferably, the exhaust outlet is provided with exhaust valve.
Preferably, the air outlet is provided with dust removing units, and the air outlet passes through the dust removing units and the circulation pipe Road is connected.
Preferably, the air inlet is provided with circulating fan, and the air inlet passes through the circulating fan and the circulation pipe Road is connected.
Preferably for any evaporator, the bottom of evaporator is provided with water storage disk, and the water storage disk is provided with draining Pipe.
Preferably, the outer enclosed structure of the Multi-layer belt type drying system is insulation material.
A kind of Multi-layer belt type drying system in parallel based on two-stage heat pump provided by the invention, by using multiple heat pump lists First in parallel heat pump circulating system, by caused hot and humid air during dried material, by each heat pump parallel with one another Unit carries out cool-down dehumidification jointly, effectively carries out cool-down dehumidification to air-out;Air is total to by each heat pump unit parallel with one another With being heated, wind pushing temperature is effectively improved;So as to pass through the common cool-down dehumidification of multiple heat pump units and the side heated jointly Formula is solved when supplying the warm and humid difference of return air larger, and Multi-layer belt type drying system is ineffective, it is difficult to the problem of satisfaction requires.
Brief description of the drawings
Fig. 1 is a kind of structural representation of Multi-layer belt type drying system of the embodiment of the present invention;
Fig. 2 is the structural representation of the hothouse in a kind of Multi-layer belt type drying system of the embodiment of the present invention;
Fig. 3 is a kind of structural representation of Multi-layer belt type drying system of the embodiment of the present invention;
Fig. 4 is the structural representation of the evaporator in a kind of Multi-layer belt type drying system of the embodiment of the present invention;
Fig. 5 is a kind of closed type operational mode schematic diagram of Multi-layer belt type drying system of the embodiment of the present invention;
Fig. 6 is a kind of semi-open type operational mode schematic diagram of Multi-layer belt type drying system of the embodiment of the present invention;
Description of reference numerals:
11-air inlet;12-air outlet;13-transmission net band;
14-circulating line;21-charging aperture;22-discharging opening;
23-porous plate;24-striker plate;31-moist chamber;
32-heating chamber;33-fresh wind port;34-exhaust outlet;
35-new air-valve;36-exhaust valve;37-dust removing units;
38-circulating fan;39-outer enclosed structure;41-water storage disk;
42-drainpipe;101-evaporator;102-first order compressor;
103-high stage compressor;104-fluid reservoir;105-condenser;
106-second level choke valve;107-first order choke valve.
Embodiment
With reference to the accompanying drawings and examples, the embodiment of the present invention is described in further detail.Implement below Example is used to illustrate the present invention, but is not limited to the scope of the present invention.
In the description of the invention, unless otherwise indicated, " multiple " are meant that two or more;" several " It is meant that one or more;Term " on ", " under ", "left", "right", " interior ", " outer ", " front end ", " rear end ", " head ", " tail The orientation or position relationship of the instructions such as portion " are based on orientation shown in the drawings or position relationship, are for only for ease of and describe this hair It is bright and simplify description, rather than instruction or imply that signified device or element must have specific orientation, with specific orientation Construction and operation, therefore be not considered as limiting the invention.
Fig. 1 is a kind of structural representation of Multi-layer belt type drying system of the embodiment of the present invention.A kind of as shown in figure 1, multilayer Belt drying system includes:Hothouse and heat pump cycle subsystem;The bottom of hothouse is provided with several air inlets 11, top is set There are several air outlets 12;Multi-layer network band 13 is located in hothouse, and the input undertaking upper strata of lower floor's transmission net band is adjacent The output end of transmission net band;Heat pump cycle subsystem includes multiple circulating lines 14 and multiple heat pump units parallel with one another;Appoint One heat pump unit includes forming the evaporator 101 of independent circulation circuit, first order compressor 102, fluid reservoir 104, second level pressure Contracting machine 103, condenser 105, second level choke valve 106 and first order choke valve 107;The evaporator of any heat pump unit and Condenser is positioned in any circulating line;The both ends of any circulating line 14 air inlet 11 and air outlet with hothouse respectively 12 connections.
A kind of Multi-layer belt type drying system includes:Hothouse and heat pump cycle subsystem.
Wherein, heat pump cycle subsystem includes multiple circulating lines 14 and multiple heat pump units parallel with one another.
The both ends of any circulating line 14 are connected 12 with the air inlet 11 and air outlet of hothouse respectively.
Multiple heat pump units are parallel with one another.As shown in figure 1, for any heat pump unit, evaporator 101 passes sequentially through first Level compressor 102, fluid reservoir 104, high stage compressor 103 are connected with condenser 105, and condenser 105 passes sequentially through second again Level choke valve 106, fluid reservoir 104, first order choke valve 107 are connected with evaporator 101.Further, each heat pump unit is also Including pipeline and corresponding accessory.The evaporator 101 and condenser 105 of any heat pump unit are positioned over any circulating line It is interior, to realize the parallel connection of multiple heat pump units.
First order compressor and high stage compressor can use invariable frequency compressor and frequency-changeable compressor.Preferably, first Level compressor and high stage compressor are frequency-changeable compressor.First order compressor and the type of second level compression, which can use, lives Fill in compressor, screw compressor, rotor compressor or helical-lobe compressor, but not limited to this.
The equal choke valve of first order choke valve and the second level can use capillary, heating power expansion valve or electric expansion valve, but Not limited to this.
Caused hot and humid air during dried material, enter by air outlet 12 14 in circulating line;Circulating In pipeline 14, hot and humid air passes through the evaporator 101 of each heat pump unit;The evaporator 101 of each heat pump unit is common The heat in hot and humid air is absorbed, is passed by respective first order compressor 102, fluid reservoir 104 and high stage compressor 103 Condenser 105 corresponding to passing, the temperature of hot and humid air are down to dew point so as to separate out condensed water;Hot and humid air passes through The Cryogenic air that the cool-down dehumidification of evaporator 101 of each heat pump unit obtains, by the condenser 105 of each heat pump unit;Often The heat that the condenser 105 of one heat pump unit is absorbed using corresponding evaporator 101, heats to the air of process, obtains jointly To high temperature air;Heat obtained high temperature air and enter hothouse by air inlet 11, to the material on Multi-layer network band 13 It is dried.
Caused hot and humid air during dried material, is cooled jointly by each heat pump unit parallel with one another Dehumidifying;Air is heated jointly by each heat pump unit parallel with one another.
Fig. 2 is the structural representation of the hothouse in a kind of Multi-layer belt type drying system of the embodiment of the present invention.Such as Fig. 2 institutes Show, the bottom of hothouse is provided with several air outlets 12 provided with several air inlets 11, top;Multi-layer network band 13 is positioned at dry Dry interior, the input of lower floor's transmission net band accept the output end of the adjacent transmission net band in upper strata.
Air inlet 11 is located at the bottom of hothouse, enters hothouse for high temperature air;High temperature air is used for dried material.
Air outlet 12 is located at the top of hothouse, dry for caused hot and humid air during dried material to be discharged Dry room.
Further, the air inlet 11 of hothouse and/or air outlet 12 are provided with porous plate 23, make air uniformly across more Layer transmission net band 13.
Multi-layer network band 13 is located in hothouse.Transmission net band 13 is made up of stainless sheet steel that perforating, perforation it is close Degree preferably 12~60 mesh, but not limited to this.The input of lower floor's transmission net band accepts the output end of the adjacent transmission net band in upper strata. Interval between adjacent two layers transmission net band can be set according to material, to enable material fully to be contacted with high temperature air, be obtained Dried to abundant.
Transmission net band 13 is drying indoor moving by actuator drives, to transmit material;Adjacent two layers transmission net band Direction of transfer is opposite.The operating rate of transmission net band 13 can be adjusted according to material and temperature.Preferably, every layer of transmission net The operating rate of band can be adjusted respectively.
Preferably, drying chamber interior walls of the upper strata transmission net with output end side are provided with striker plate 24, avoid material in phase Deviate from transmission net band when being transmitted between adjacent two layers of transmission net band, cause material and energy waste.
Further, the top of hothouse is provided with charging aperture 21, bottom is provided with discharging opening 22, is respectively used to material to be dried Hothouse is drawn off into hothouse and by dry material.
Material enters hothouse by charging aperture 21, falls most on last layer transmission net band, by successively passing from top to bottom The transmission of guipure is sent, hothouse is drawn off finally by discharging opening 22.Material is being transmitted by each layer of transmission net band from top to bottom During, the high temperature air in hothouse is from bottom to up by each layer of transmission net band, with each layer of transmission net band 13 Material fully contacts, abundant dried material.
The embodiment of the present invention will produce by using multiple heat pump units heat pump circulating system in parallel during dried material Raw hot and humid air, cool-down dehumidification is carried out by each heat pump unit parallel with one another jointly, effectively air-out dropped Temperature dehumidifying;Air is heated jointly by each heat pump unit parallel with one another, effectively improves wind pushing temperature;So as to by more The common cool-down dehumidification of individual heat pump unit and the mode heated jointly are solved when larger for the warm and humid difference of return air, and Multi-layer belt type, which is dried, is Unite ineffective, it is difficult to the problem of satisfaction requires.Further, any evaporator absorbs the heat in hot and humid air, Corresponding condenser is passed to by corresponding first order compressor, fluid reservoir and high stage compressor, condenser utilizes corresponding steam The heat that hair device is absorbed heats to air, effectively during recovery dried material in caused hot and humid air Heat, improves the efficiency of heat pump cycle subsystem, and then improves the efficiency of drying system.
Based on above-described embodiment, the both ends of circulating line are connected further bag with the air inlet and air outlet of hothouse respectively Include:The first end of one circulating line and an air outlet of hothouse connect, or the first end of circulating line and drying Multiple air outlets connection of room, or the connection of an air outlet of the first end of multiple circulating lines and hothouse;Also, one is followed One air inlet of second end in endless tube road and hothouse connects, or the second end of circulating line and hothouse it is multiple enter Air port connects, or the connection of an air inlet of the second end of multiple circulating lines and hothouse.
The mode of the air inlet of circulating line and hothouse connection can include:The first end of one circulating line and drying The air outlet connection of room, or multiple air outlets of the first end of circulating line and hothouse connect, or multiple circulations The first end of pipeline and hothouse air outlet connect.
The mode of the air outlet of circulating line and hothouse connection can include:Second end of one circulating line and drying The air inlet connection of room, or multiple air inlets of the second end of circulating line and hothouse connect, or multiple circulations Second end of pipeline and an air inlet of hothouse connect.
The mode that the both ends of circulating line are connected with the air inlet and air outlet of hothouse respectively, can be according to actual need Will, by the way of the connection of the air inlet of circulating line and hothouse in any one, with going out for circulating line and hothouse Any one in the mode of air port connection is combined.
Different connected modes of the embodiment of the present invention by the both ends of circulating line from the air inlet of hothouse and air outlet, The parallel connection of multiple heat pump units is realized, makes caused hot and humid air during dried material, by parallel with one another each Heat pump unit carries out cool-down dehumidification jointly, effectively carries out cool-down dehumidification to air-out;Air is by each heat pump list parallel with one another Member is heated jointly, effectively improves wind pushing temperature;So as to pass through the common cool-down dehumidification of multiple heat pump units and common heating Mode solve for the warm and humid difference of return air it is larger when, Multi-layer belt type drying system is ineffective, it is difficult to meets the problem of requiring.Enter one Step ground, the mode that the both ends of circulating line are connected with the air inlet and air outlet of hothouse respectively can be flexible according to actual conditions Set, make Multi-layer belt type drying system that there is the wider scope of application.
Fig. 3 is a kind of structural representation of Multi-layer belt type drying system of the embodiment of the present invention.As shown in figure 3, based on above-mentioned Embodiment, any circulating line 14 include moist chamber 31 and heating chamber 32;For any circulating line 14, moist chamber 31 and air-out Mouth 12 connects;The evaporator of any heat pump unit is positioned in moist chamber 31;Heating chamber 32 is connected with air inlet 11;Any heat pump The condenser of unit is positioned in heating chamber 32.
Any circulating line includes moist chamber 31 and heating chamber 32.For any circulating line 14, moist chamber 31 is with drying The air outlet 12 of room is connected, and heating chamber 32 is connected with the air inlet 11 of hothouse;The evaporator 101 of any heat pump unit, mutually Parallel connection, it is positioned in moist chamber 31;The condenser 105 of any heat pump unit, it is parallel with one another, and be positioned in heating chamber 32.
The embodiment of the present invention is by setting moist chamber and heating chamber, and evaporator is positioned in moist chamber, and condenser is positioned over In heating chamber, make caused hot and humid air during dried material, carried out jointly by each heat pump unit parallel with one another Cool-down dehumidification, cool-down dehumidification effectively is carried out to air-out;Air is heated jointly by each heat pump unit parallel with one another, is had Improve wind pushing temperature in effect ground;By way of heating the common cool-down dehumidification of multiple heat pump units and jointly, solution supplies return air When warm and humid difference is larger, Multi-layer belt type drying system is ineffective, it is difficult to the problem of satisfaction requires.
As shown in figure 3, being based on above-described embodiment, any circulating line 14 also includes fresh wind port 33 and/or exhaust outlet 34;It is right In any circulating line, fresh wind port 33 closes on heating chamber 32 between moist chamber 31 and heating chamber 32;Exhaust outlet 34, which is located at, to be removed Between moist chamber 31 and heating chamber 32, moist chamber 31 is closed on.
Circulating line 14 also includes fresh wind port 33 and/or exhaust outlet 34.Fresh wind port 33 is located at moist chamber 31 and heating chamber 32 Between, heating chamber 32 is closed on, for fresh air to be added in circulating line 14.Exhaust outlet 34 is located at moist chamber 31 and heating Between room 32, moist chamber 31 is closed on, for caused hot and humid air during dried material to be discharged into circulating line 14.Newly Air port and/or exhaust outlet can be arranged on each circulating line, can also be arranged as required on the circulating line of part.
In the running of Multi-layer belt type drying system, can be lost or discharge the reasons such as circulating line 14 because of air causes Deficiency in draught in circulating line 14, fresh air can be now added in circulating line 14 in time by fresh wind port 33, Ensure the drying effect of material, reduce the energy consumption of heat pump unit compressor.
The caused hot and humid air during dried material, after evaporator cool-down dehumidification, its humiture is still When higher, hot and humid air can be discharged by circulating line 14 by exhaust outlet 34.Circulation pipe is discharged in hot and humid air Behind road 14, fresh air can be added in circulating line 14, ensure the drying effect of material, reduce heat pump unit compressor Energy consumption.
The embodiment of the present invention is added to fresh air in circulating line by setting fresh wind port, ensures the drying of material Effect, the energy consumption of heat pump cycle subsystem is reduced, improve the efficiency of heat pump cycle subsystem.The embodiment of the present invention passes through the row of setting Air port, hot and humid air is discharged into circulating line, reduces the energy consumption of heat pump cycle subsystem, improves heat pump cycle subsystem Efficiency.
As shown in figure 3, being based on above-described embodiment, fresh wind port 33 is provided with new air-valve 35.
Air-valve, it is commonly used in pipeline, the air quantity in pipeline is adjusted by opening and closing or the adjustment of aperture.The present invention is implemented In example, new air-valve 35 is by the way that fresh air is added in circulating line 14, to adjust the air quantity in circulating line 14.It is preferred that Ground, new air-valve are the air-valve of adjustable opening.Exhaust valve can be set on each exhaust outlet, can also be set on the exhaust outlet of part Put exhaust valve.
When by fresh wind port 33, fresh air is added in circulating line 14, unlatching or aperture by new air-valve 35, The amount of supplement fresh air can be adjusted, and then adjusts the air quantity in circulating line 14, maintains the air quantity in circulating line 14 OK range, reduce the energy consumption of heat pump unit compressor.
The embodiment of the present invention is made in circulating line by the air quantity in setting fresh air valve regulation circulating line in fresh wind port Air quantity maintains OK range, reduces the energy consumption of heat pump cycle subsystem, improves the efficiency of heat pump cycle subsystem.
As shown in figure 3, being based on above-described embodiment, exhaust outlet 34 is provided with exhaust valve 36.
Air-valve, it is commonly used in pipeline, the air quantity in pipeline is adjusted by opening and closing or the adjustment of aperture.The present invention is implemented In example, exhaust valve 36 is used to caused hot and humid air during dried material discharging circulating line 14, high by discharging The amount of warm highly humid air, to adjust the air quantity in circulating line 14.Preferably, exhaust valve is the air-valve of adjustable opening.Can be New air-valve is set on each fresh wind port, new air-valve can also be set on the fresh wind port of part.
By exhaust outlet 34 by hot and humid air discharge circulating line 14 during, by exhaust valve 36 open or Aperture, the amount for discharging hot and humid air can be adjusted, and then adjust the air quantity in circulating line 36, reduce heat pump unit compressor Energy consumption.
Further, adjusted using new air-valve 35 and the joint of exhaust valve 36, can be respectively at drying system half-open Formula operational mode and closed type operational mode.
The embodiment of the present invention is made in circulating line by the air quantity in setting air draft valve regulation circulating line in exhaust outlet Air quantity maintains OK range, reduces the energy consumption of heat pump cycle subsystem, improves the efficiency of heat pump cycle subsystem.Further Ground, adjusted using new air-valve and the joint of exhaust valve, Multi-layer belt type drying system can be made to be respectively at semi-open type operational mode , can be so as to ensureing the wet Equilibrium Equivalent Concentration of Multi-layer belt type drying system heat with closed type operational mode.
As shown in figure 3, being based on above-described embodiment, air outlet 12 is provided with dust removing units 37, and air outlet 12 passes through dust removing units 37 are connected with circulating line 14.
Preferably, the air outlet 12 of hothouse is provided with dust removing units 37, and air outlet 12 passes through dust removing units 37 and circulation pipe Road 14 is connected.Caused hot and humid air first passes through dedusting during dried material, enters back into circulating line.Evaporator is not to Hot and humid air by dedusting carries out cool-down dehumidification, can bring the additional energy of heat pump unit compressor.
The embodiment of the present invention sets dust removing units by the air outlet in hothouse, avoids koniology in circulating line from containing The too high additional energy brought to heat pump cycle subsystem is measured, improves the efficiency of heat pump cycle subsystem.
As shown in figure 3, being based on above-described embodiment, air inlet 11 is provided with circulating fan 38, and air inlet 11 passes through circulating fan 38 are connected 14 with circulating line.
Further, the air inlet 11 of hothouse is provided with circulating fan 38, for the height that will heat to obtain by condenser Warm air, hothouse is sent into by air inlet 11.Preferably, circulating fan is frequency conversion fan.
The embodiment of the present invention sets circulating fan by the air inlet in hothouse, can be formed from bottom to up in hothouse High temperature air flow direction, with material traffic direction from top to bottom on the contrary, making high temperature air fully be contacted with material so that The drying of material is more abundant.
Fig. 4 is the structural representation of the evaporator in a kind of Multi-layer belt type drying system of the embodiment of the present invention.Such as Fig. 4 institutes Show, based on above-described embodiment, for any evaporator, the bottom of evaporator is provided with water storage disk 41, and water storage disk 41 is provided with row Water pipe 42.
Caused hot and humid gas during dried material, by condensed water can be produced during evaporator dehumidifying and cooling.For Condensed water is avoided to cause damage the various pieces of drying system, the bottom of evaporator is provided with water storage disk 41, cold for accepting Condensate;Water storage disk 41 is provided with drainpipe 42, for condensed water to be excluded into drying system in time.
By setting water storage disk in the bottom of evaporator, water storage disk is provided with drainpipe, avoids evaporator the embodiment of the present invention Condensed water caused by dehumidifying and cooling damages to caused by the various pieces of Multi-layer belt type drying system, extends Multi-layer belt type and does The service life of drying system.
As shown in figure 3, being based on above-described embodiment, the outer enclosed structure 39 of Multi-layer belt type drying system is insulation material.
In order to reduce influence of the environment temperature to drying system, the outer enclosed structure 39 of Multi-layer belt type drying system is using guarantor Adiabator.Preferably, insulation material is polyurethane thermal insulation board, but not limited to this.
The embodiment of the present invention makes the outer enclosed structure of Multi-layer belt type drying system by using insulation material, reduces environment Influence of the temperature to Multi-layer belt type drying system, improves the efficiency of heat pump cycle subsystem, and then improves Multi-layer belt type and do The efficiency of drying system.
Based on above-described embodiment, below a kind of operational mode of Multi-layer belt type drying system provided by the invention is entered to advance One step explanation.
Fig. 5 is a kind of closed type operational mode schematic diagram of Multi-layer belt type drying system of the embodiment of the present invention.Such as Fig. 5 institutes Show, the exhaust valve 36 that the new air-valve 35 and exhaust outlet 34 that fresh wind port 33 is provided with are provided with is dried all in closed mode, Multi-layer belt type System operation is in closed type operational mode.Under normal circumstances, Multi-layer belt type drying system runs on closed type operational mode, carries out Dry materials.
Caused hot and humid air during dried material, by porous plate 23, by the dust removing units of air outlet 12 37 enter in circulating line 14 moist chamber 31;In moist chamber 31, hot and humid air passes through the evaporation of each heat pump unit Device 101;The evaporator 101 of each heat pump unit absorbs the heat in hot and humid air jointly, is compressed by the respective first order Machine 102, fluid reservoir 104 and high stage compressor 103 pass to corresponding condenser 105, and the temperature of hot and humid air is down to Dew point is so as to separating out condensed water;The low temperature that hot and humid air obtains by the cool-down dehumidification of evaporator 101 of each heat pump unit Air, into heating chamber 32, by the condenser 105 of each heat pump unit;The utilization pair of condenser 105 of each heat pump unit The heat for answering evaporator 101 to absorb, heats to the air of process, obtains high temperature air jointly;It is empty to heat obtained high temperature Gas enters hothouse by the circulating fan 38 of air inlet 11, and by porous plate 23, the material on Multi-layer network band 13 is entered Row drying.Hot and humid air caused by after material is dried, by porous plate 23, by the dust removing units of air outlet 12 37 enter in circulating line 14 moist chamber 31, complete circulation.
Fig. 6 is a kind of semi-open type operational mode schematic diagram of Multi-layer belt type drying system of the embodiment of the present invention.Such as Fig. 6 institutes Show, the exhaust valve 36 that the new air-valve 35 and exhaust outlet 34 that fresh wind port 33 is provided with are provided with is dried all in half-open position, Multi-layer belt type System operation is in semi-open type operational mode.When drying system it is hot wet uneven when, Multi-layer belt type drying system can be run on Semi-open type operational mode, while dry materials are carried out, adjusted by discharging hot and humid air and supplement fresh air The wet balance of heat.
Caused hot and humid air during dried material, by porous plate 23, by the dust removing units of air outlet 12 37 enter in circulating line 14 moist chamber 31;In moist chamber 31, hot and humid air passes through the evaporation of each heat pump unit Device 101;The evaporator 101 of each heat pump unit absorbs the heat in hot and humid air jointly, is compressed by the respective first order Machine 102, fluid reservoir 104 and high stage compressor 103 pass to corresponding condenser 105, and the temperature of hot and humid air is down to Dew point is so as to separating out condensed water;The hot and humid air in part passes through the cool-down dehumidification of evaporator 101, and humiture is still hot higher, by arranging Air-valve 36 is discharged outside circulating line 14;The hot and humid air in part passes through the Cryogenic air that the cool-down dehumidification of evaporator 101 obtains, and enters Enter in heating chamber 32, mixed with the fresh air supplemented by new air-valve 35, mixed air is cold by each heat pump unit Condenser 105;The heat that the condenser 105 of each heat pump unit is absorbed using corresponding evaporator 101, enters to the air of process jointly Row heating, obtains high temperature air;Heat obtained high temperature air and hothouse is entered by the circulating fan 38 of air inlet 11, pass through Porous plate 23, the material on Multi-layer network band 13 is dried.Hot and humid air caused by after material is dried, By porous plate 23, enter in circulating line 14 moist chamber 31 by the dust removing units 37 of air outlet 12, complete circulation.
The embodiment of the present invention is combined by using semi-open type and closed type mixed running pattern using exhaust valve and new air-valve Regulation, so as to ensure the wet Equilibrium Equivalent Concentration of Multi-layer belt type drying system heat.
Based on above-described embodiment, a kind of Multi-layer belt type drying system also includes control device.Control device and each heat pump Unit, exhaust valve, new air-valve connect with circulating fan, for controlling the operation of drying system.Control device include controlling switch, Temperature controller and PLC panels, but not limited to this.Can be integrated by controlling switch, temperature controller, PLC panels etc., it is arranged on Outside hothouse.Controlling switch, temperature controller and PLC panels cooperate, and control opening for each heat pump unit and circulating fan Open or close, control unlatching, closing and the aperture size of exhaust valve and new air-valve.The volume of the associated control procedures of control device Write, completed using any method known in the art.
The embodiment of the present invention controls each heat pump unit, exhaust valve, new air-valve and circulating fan by control device so that The operation of Multi-layer belt type drying system is more accurate, and drying effect is more preferable, and improves the efficiency of Multi-layer belt type drying system.
Finally, system provided by the invention is only preferable embodiment, is not intended to limit the scope of the present invention. Within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., it should be included in the present invention's Within protection domain.

Claims (10)

  1. A kind of 1. Multi-layer belt type drying system, it is characterised in that including:Hothouse and heat pump cycle subsystem;
    The bottom of the hothouse is provided with several air inlets, top is provided with several air outlets;Multi-layer network band is located at institute State in hothouse, the input of lower floor's transmission net band accepts the output end of the adjacent transmission net band in upper strata;
    The heat pump cycle subsystem includes multiple circulating lines and multiple heat pump units parallel with one another;
    Any heat pump unit includes forming the evaporator of circulation loop, first order compressor, fluid reservoir, second level compression Machine, condenser, second level choke valve and first order choke valve;The evaporator and condenser of any heat pump unit, which are positioned over, appoints In one circulating line;
    The both ends of any circulating line are connected with the air inlet and air outlet of the hothouse respectively.
  2. 2. Multi-layer belt type drying system according to claim 1, it is characterised in that the both ends of the circulating line respectively with The air inlet of the hothouse connects with air outlet to be further comprised:The first end of one circulating line and the hothouse The connection of an air outlet, or the first end of a circulating line is connected with multiple air outlets of the hothouse, or more The first end of the individual circulating line is connected with an air outlet of the hothouse;
    Also, the second end of a circulating line is connected with an air inlet of the hothouse, or a circulation Second end of pipeline is connected with multiple air inlets of the hothouse, or the second end of multiple circulating lines and the drying The air inlet connection of room.
  3. 3. Multi-layer belt type drying system according to claim 2, it is characterised in that any circulating line includes dehumidifying Room and heating chamber;
    For any circulating line, the moist chamber is connected with the air outlet;The evaporator of any heat pump unit It is positioned in the moist chamber;The heating chamber is connected with the air inlet;The condenser of any heat pump unit is positioned over In the heating chamber.
  4. 4. Multi-layer belt type drying system according to claim 3, it is characterised in that the circulating line also includes fresh wind port And/or exhaust outlet;
    The fresh wind port closes on the heating chamber between the moist chamber and heating chamber;
    The exhaust outlet closes on the moist chamber between the moist chamber and heating chamber.
  5. 5. Multi-layer belt type drying system according to claim 4, it is characterised in that the fresh wind port is provided with new air-valve.
  6. 6. Multi-layer belt type drying system according to claim 4, it is characterised in that the exhaust outlet is provided with exhaust valve.
  7. 7. Multi-layer belt type drying system according to claim 1, it is characterised in that the air outlet is provided with dust removing units, The air outlet is connected by the dust removing units with the circulating line.
  8. 8. Multi-layer belt type drying system according to claim 1, it is characterised in that the air inlet is provided with circulating fan, The air inlet is connected by the circulating fan with the circulating line.
  9. 9. Multi-layer belt type drying system according to claim 1, it is characterised in that for any evaporator, evaporation The bottom of device is provided with water storage disk, and the water storage disk is provided with drainpipe.
  10. 10. Multi-layer belt type drying system according to any one of claims 1 to 9, it is characterised in that the Multi-layer belt type is dried The outer enclosed structure of system is insulation material.
CN201710674955.9A 2017-08-09 2017-08-09 Multilayer belt drying system based on two-stage heat pump parallel connection Active CN107687759B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0657017A1 (en) * 1993-06-30 1995-06-14 Baggio Tecnologie Srl Drier for the continuous drying and conditioning treatment of hides or fabrics
CN204478763U (en) * 2015-01-12 2015-07-15 天津科技大学 A kind of Multi-layer belt type heat pump drying equipment
CN105021013A (en) * 2014-04-23 2015-11-04 中国科学院理化技术研究所 Heat pump drying system with sensible heat recovery function and multi-effect dehumidification function
CN105716410A (en) * 2016-03-23 2016-06-29 青岛大学 Haw flake and caked sugar heat pump dryer and drying system
CN106568317A (en) * 2016-11-01 2017-04-19 浙江豪瓦特节能科技有限公司 Belt-type temperature-variable type grain heat pump drying device
CN106766795A (en) * 2016-11-25 2017-05-31 中国科学院理化技术研究所 A kind of tunnel type multi-stage heat pump series connection desiccant dehumidification system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0657017A1 (en) * 1993-06-30 1995-06-14 Baggio Tecnologie Srl Drier for the continuous drying and conditioning treatment of hides or fabrics
CN105021013A (en) * 2014-04-23 2015-11-04 中国科学院理化技术研究所 Heat pump drying system with sensible heat recovery function and multi-effect dehumidification function
CN204478763U (en) * 2015-01-12 2015-07-15 天津科技大学 A kind of Multi-layer belt type heat pump drying equipment
CN105716410A (en) * 2016-03-23 2016-06-29 青岛大学 Haw flake and caked sugar heat pump dryer and drying system
CN106568317A (en) * 2016-11-01 2017-04-19 浙江豪瓦特节能科技有限公司 Belt-type temperature-variable type grain heat pump drying device
CN106766795A (en) * 2016-11-25 2017-05-31 中国科学院理化技术研究所 A kind of tunnel type multi-stage heat pump series connection desiccant dehumidification system

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