CN205561498U - Joint hot air drying device of full -automatic high -efficient low temperature dehumidification - Google Patents

Joint hot air drying device of full -automatic high -efficient low temperature dehumidification Download PDF

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Publication number
CN205561498U
CN205561498U CN201521055073.7U CN201521055073U CN205561498U CN 205561498 U CN205561498 U CN 205561498U CN 201521055073 U CN201521055073 U CN 201521055073U CN 205561498 U CN205561498 U CN 205561498U
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air
motor
driven valve
valve
hothouse
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叶灿滔
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叶灿滔
汪鹏
郑晓鹏
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Abstract

The utility model discloses a joint hot air drying device of full -automatic high -efficient low temperature dehumidification, including drying chamber, a return air room, secondary return air cooling room, intensification plenum chamber, box, main control system, heat pump low temperature dehumidification system is connected to drying chamber left side and return air room, secondary return air cooling room and an intensification plenum chamber, and the right side is passed through the flange and is connected and be connected with external hot -blast, and the upside is equipped with the feeding granulator, and the downside is equipped with the discharge gate, and interior three -layer conveyer belt and the transmission shaft of drying chamber can realize by the automatic conveying of dry material, one -way A movable partition be used for preventing drying chamber hot gas flow " short circuit ", realization pierce through the conveyer belt after the air distribution form of " under serve back ", the box upside is equipped with the relief valve, realize dry run sealed, pressure -bearing, thermal -insulated and stabilize safety, dry indoor arrangement differential pressure sensor, temperature hygrometry sensor, the main control system washs alarm signal according to the automatic motorised valve filter screen that sends of preset's parameter, electric valve on and off control signal and motorised valve aperture control signal, compressor, centrifugal fan and axial flow pump open and stop control signal, realize the full -automatic high -efficient low temperature joint differential pressure sensor 1 differential pressure sensor 2 that dehumidifies.

Description

A kind of full automatic high efficiency low temperature dehumidification associating hot-air drying device
Technical field
The present invention relates to a kind of full automatic high efficiency low temperature dehumidification associating hot-air drying device.
Background technology
Being dried is most to account for one of old unit operation, extensively application national economy every field;Meanwhile, Being dried also is the bigger technical process that consumes energy, and in developed country, the fuel of about 10% is used for being dried.Passing In the drying equipment of system, convective drying is widely used with its simple in construction, easy to operate, strong adaptability , it is that production at present uses most a kind of drying equipments.The shortcoming of convective drying is that the thermal efficiency is the lowest, one As only 30%~60%, it is primarily due to the direct emptying of dry run waste gas, not only because of waste gas band Walk waste heat and cause waste, and pollute environment.Although using portion to follow in minority convective drying Ring can reclaim a part of waste heat, but by waste gas circulation quantitative limitation, is typically only 20%~30%.With often Although the heat exchanger of rule can reclaim part sensible heat in waste gas, but in waste gas, the heat of 60%~80% is with latent heat Form exists, and is still discharged.Reclaim latent heat therein, be necessary for waste gas to be cooled to dew point temperature Below degree, the latent heat of recovery to be made has suitable temperature quality, is used further to dry run.Want real This process existing, it is necessary to utilize heat pump assembly.
The built-in alarm of existing building is substantially and uses the mode being separately provided inductor, due to this The working method of inductor is single, detects the most inaccurate, it is easy to wrong report situation occurs.Although someone adopts at present With installing the mode of multiple inductors, but being generally all to be respectively mounted with separate form, installation wiring bothers, no Enough succinct.Further, the mounting connection structure within existing inductor is the most unreasonable, the most firmly, is very easy to damage Bad, cause parts to depart from, reduce detection accuracy.Heat pump is to utilize the low-temperature heat sources such as water, air and various waste heats The device of a kind of clean energy-saving.Heat pump can absorb heat from natural environment or residual heat resources thus obtain than input Can more export heat energy, therefore can save the primary needed for heating, air-conditioning, supplying hot water and industry heating The energy.Compared with Application in Building heat pump, the ratio at industrial aspect application heat pump is the least, applicable industry Heat pump reduces CO2 emission and will fully develop talents.Traditional drier of high temperature is not suitable for being dried heat Sensitive biological products, the conventional dryer being dried heat sensitive biological products also exists clearly disadvantageous, many Number drier all runs and is only applied to be dried the product determined under the conditions of a limited dry environment. Heat pump is most effective to utilize energy to provide heat and the method for cold, because of it can control humidity and temperature can be -20 DEG C~100 DEG C any adjustable, it is possible to well meets heat sensitive Biochemical product drying requirement.Some material Need when being dried to carry out at high temperature, but need relatively low baking temperature in many Biochemical product dryings, Heat pump can well meet dry requirement, so application heat pump drying is had great potentialities.Heat pump self will not picture Boiler produces heat like that, but it can be increased to high-temperature position heat from low-temperature level, and the temperature rise of heat pump is Its output temperature and the difference of heat source temperature.Comparing with conventional convective drying, heat pump drying has the characteristics that 。
(1) energy consumption is saved.Saving the energy is the starting point that heat pump is initially applied, and is also its major advantage .The thermal efficiency height of heat pump techniques is fairly obvious, 1 part of convertible 3~4 parts of heat energy of electric energy.Heat pump drying process It is to carry out in the system closed, dry run has not only reclaimed the sensible heat in waste gas, and has reclaimed Latent heat in waste gas, heat energy loss is only thermal resistance and the heat leak of system, and this is that other dry technology cannot be compared 's.Heat pump drying unit is more more effective than direct electro heating, and heat pump low temperature (15 DEG C~45 DEG C) desiccated wood can save About energy consumption 40%.The temperature that dried rice is suitable for, at 35 DEG C~50 DEG C, though temperature is low, but needs substantial amounts of heat , the efficiency of conventional dryer only has 3%~5%, and with heat pump drying, then efficiency significantly improves.Cloth is to dry Dry temperature has strict restriction, heat pump drying unit not only to meet this requirement, and than traditional dryer group Energy-conservation 50%.
(2) product quality is improved.Want to obtain high-quality dry products, it is necessary to dry environment Temperature and humidity accurately controls.Heat pump drying unit can obtain the dry of lower temperature and low relative humidity Dry environment, accommodates being dried in heat sensitive materials such as big portion agricultural product, medicinal materials.In recent years, heat pump is utilized to do The high-quality dry products of dry acquisition continuous studied person confirmed.It addition, heat pump is being dried of a kind of gentleness Mode, access expansion is dried, the evaporation rate of surface moisture with internal to surface migration speed relatively, Ensure that by the quality better of dry product, color and luster is good, product hierarchy is high.
(3) drying condition adjustable extent width.The temperature regulating range of heat pump drying is at-20 DEG C~100 DEG C (adding assisted heating device), regulation of relative humidity scope is 15%~80%.Wider adjustable range makes heat pump The dry dry processing that can be suitable for various materials.
(4) save drying time.Low temperature drying is used often to take long.Because traditional drier exists In dry run, owing to the humidity of dry medium is more or less the same with the humidity of dried material, cause efficiency low. And heat pump drying unit can utilize the exsiccation of evaporimeter to make efficiency improve, the most mostly use heat pump auxiliary Help drying machine to shorten drying time.If its humidity can be reduced to 3.12% by drying vegetables, heat pump auxiliary is dry Dry unit is than the drying time few 40.7% of tradition electrical drying unit.At present, ensure product quality and The time that how to reduce while energy-conservation still needs to study further.
(5) environmental friendliness.Dry materials not only needs improve product quality and save energy consumption, simultaneously must Must be environmentally friendly.Based on identical evaluation criterion, heat pump is minimum on the impact of global warming.To environment Close friend is the advantage of heat pump drying unit.The most external application heat pump of advocating reduces CO2Discharge, it Application will develop further.
At present, the development of domestic and international heat pump drying technology is mainly manifested in down several aspect: l) use again Close refrigeration working medium, research and develop high-pressure refrigeration compressor, to improve condensation temperature, thus meet higher doing Dry temperature requirement;2) application multistage evaporation Novel heat pump device, to meet different material or material of the same race not With the temperature requirement being dried the period;3) heat pump combination drying system, shortens drying time further, improves and do Dry efficiency;4) research and development of Novel heat pump technology, the development of heat pump drier based on Absorption Cooling System, The exploitation of chemical heat pump and application;5) collection is dried, refrigerates, is frozen in the Multipurpose thermal pumping system of one;6 ) novel functional and not welding cold-producing medium developmental research.
Utility model content
It is an object of the invention to overcome the defect of existing convection current hot blast technique, it is provided that a kind of full-automatic High efficient cryogenic dehumidifying associating hot-air drying device.
For realizing object above, this invention takes following technical scheme:
A kind of full automatic high efficiency low temperature dehumidification associating hot-air drying device includes hothouse, primary retirn air room, secondary Return air cooling chamber, intensification plenum chamber, casing, control main frame.On the left of described hothouse and primary retirn air Room, secondary return air cooling chamber and intensification plenum chamber respectively by air-supply motor-driven valve, primary retirn air motor-driven valve and Secondary return air motor-driven valve connects, and right side is provided with hot blast motor-driven valve and hot blast return air motor-driven valve, is connect by flange Head with the external world hot blast be connected, upside is provided with charging comminutor, and downside is provided with discharging opening, be dried material " Upper entering and lower leaving ", charging comminutor is put on the belt for the granulating and homogenization cloth being dried material , discharging opening (centralized recovery and encapsulation, three layers of conveyer belt in hothouse and the biography for dried material Moving axis can realize being dried the automatic transmission of material, is provided with one-way movable dividing plate and does for preventing in hothouse Dry room thermal current " short-circuit ", realize penetrating conveyer belt after the Air Distribution of " under serve back ".Rise Being provided with compressor, condenser and choke valve in temperature plenum chamber, compressor outlet high temperature refrigerant enters condenser Afterwards for the heating of return air stream, choke valve is for the step-down down cycles of working medium, and air-flow is heated to set Enter hothouse by air-supply motor-driven valve after fixed temperature material is dried;Penetrate ground floor conveyer belt After dry thermal current, a part enters primary retirn air room by once returning Electric air valve, and another part is worn Thoroughly after second, third layer of conveyer belt, enter secondary return air cooling chamber by secondary returning Electric air valve;Once Centrifugal blower it is provided with, for the preheating of mixed airflow and be delivered to intensification plenum chamber in return air chamber;Secondary returning Surface cooler, plate type heat exchanger, axial flow pump, mixing air port and water-collecting tray it is provided with, by saving in wind cooling chamber The cryogenic fluid that stream valve comes is transported to cold in surface cooler release by plate type heat exchanger and axial flow pump Putting, air-flow temperature after surface cooler reaches below dew-point temperature and separates out condensation water to after water-collecting tray, logical Cross drainpipe and draining valve is automatically discharged into the external world, after air-flow dehumidifying, enter primary retirn air by mixing air port After indoor mix preheating with primary retirn air air-flow, reenter intensification plenum chamber by centrifugal blower and carry out again Heating, completes the circulation of low temperature dehumidification heated-air drying.Safety valve it is provided with, it is achieved dry run on the upside of casing Sealing, pressure-bearing, heat insulation and stable safety;Differential pressure pickup, temperature/relative humidity is arranged in hothouse Sensor, the data gathered are transmitted to controlling main frame, control main frame automatic according to parameter set in advance Send motor-driven valve filter gauze cleaning alarm signal, electrically operated valve open and close controlling signal and motor-driven valve aperture and control letter Number, it is achieved Automatic Control.
The operation principle of the present invention: the present invention is applicable to the low temperature dehumidification drying process of heat sensitive material Engineering.Full automatic high efficiency low temperature dehumidification of the present invention associating hot-air drying device operation logic:
1. material moisture carburation by evaporation principle.Vaporization refers to that material becomes the phase transition process of gaseous state from liquid , evaporating and seething with excitement is two kinds of forms of vaporized species, and the former is the vaporization phenomenon occurred on liquid surface , and the latter is that the vaporization phenomenon in liquid bulk occurs when saturated vapour pressure is equal to outside pressure;To same One material, saturated vapour pressure raises with temperature and increases;From the point of view of microcosmic, steam is by the liquid level that flies out Molecular composition;The fluid molecule only at given temperature with relatively high kinetic energy just can shake off surrounding molecular Gravitation jump out from liquid surface, formed steam;Evaporation is the vaporization phenomenon occurred at liquid surface;Steam Send out and can occur at any temperature, during liquid evaporation, need heat absorption;Temperature is the highest, evaporates the fastest;Table Area is big, good being conducive to of ventilating is evaporated;The inverse process of evaporation is liquefaction, i.e. gas transition is liquid;When Two kinds of processes reach dynamic equilibrium, and steam now is saturated vapor.In dry run, it is dried medium The drying capacity of (air) is the temperature by it and relative humidity decision.In the feelings that absolute humidity is constant Condition is foretold, and temperature raises, then the relative humidity of air declines, and drying capacity increases.Temperature-resistant, reduce The relative humidity of air, the drying capacity of air rises equally.Therefore improve temperature and reduce relative humidity Equally reach to improve the effect of air drying capability, say, that the air of low temperature and low humidity also has one Fixed drying capacity.During convective drying, moisture from material table towards the transfer rate of dry medium is: N=hp(ps-p), in formula: N be moisture from material table towards the transfer rate of dry medium, kg/ (m2·s) ;hpFor mass tranfer coefficient, it is temperature and the function of surface humidity pressure gradientps For material surface steam-laden pressure, it is the function p of temperatures=f (T);p(empty for dry medium Gas) in steam partial pressure.The motive force being dried is material surface steam-laden pressure and dry medium The difference of (air) steam partial pressure, i.e. (ps-p)。
2. low temperature dehumidification dry run.Based on heat pump principle, utilize heat pump condenser " heat simultaneously End " heat air dried material moisture, utilize evaporimeter " cold end " reclaim humid air full heat and taken Condensation dehumidifying with moisture;Using " closed cycle " of secondary return air, by interior circulation, (i.e. refrigeration working medium follows Ring) and outer circulation (i.e. dry air circulation) two large divisions composition, the heat between two large divisions and matter The exchange of amount influences each other.When heat-pump dehumidification is dried, along with the condensation of moisture, medium in dry medium Middle steam partial pressure pReduce, pressure reduction (ps-p) increase, rate of drying N raises.Portion does not has In surface cooler, carry out cool-down dehumidification, but be directly entered primary retirn air room, at dry initial stage, material Humidity is the highest, so the air humidity entering surface cooler is big and temperature is low, surface cooler is at recovery section sensible heat While play again obvious exsiccation.Meanwhile, enter with relatively low temperature at this stage air Condenser, thus improve heat exchanger effectiveness within the condenser and add system COP value.In the early stage Drying stage, is dried and heat pump is all used effectively, so closed circulation is favourable.To a set of coupling Appropriate heat pump, the heat pump drying group of closed circulation can reach preferable result.
3. associating hot-air drying process.Owing to compression type heat pump drying system relies on compressor work to change Taking heat, system is longer in time temperature rise period run, if now can absorb heat from the external world, then may be used Improve programming rate, make system reach as early as possible to be dried needed condition.During heated-air drying, temperature T raises , material surface steam-laden pressure psIncrease, pressure reduction (ps-p) increase, rate of drying N raises. Improving programming rate and have two kinds of methods, one is to absorb heat at heat pump from the external world;Another kind of method is just It is that direct electric heater heats.The present invention considers the multiduty feature of system, has selected from outward Boundary's hot blast obtains drying source.I.e. heat pump low temperature dehumidification is used to be dried in dry early stage, should in the middle and later periods With being dried of other forms.Form a heat pump low temperature dehumidification and hot blast combination drying system, dry Later stage improves the temperature of air, makes material surface and the internal temperature difference increase, promotes that heat internally transmits So that moisture obtains enough heat vaporizations at dry and wet interface, significantly shortens whole dry run Time, save the energy largely.
The present invention compared with prior art, has the advantage that
1., by plate type heat exchanger and the secondary heat exchange system of surface cooler composition, reduce refrigeration working medium and steam Send out temperature, solve the too high compressor damage caused of cold-producing medium reflux temperature and system instability.
2. the heat pump drying unit of closed circulation can not be affected by outside climatic condition, it is achieved that one The Effec-tive Function that the four seasons in year are stable.
3. associating heated-air drying, reduces the energy consumption of dry materials initial stage warm, " secondary return air " Mixing waste heat with " primary retirn air " improves the efficiency of energy utilization of heat pump.
4. full-automatic control system, can be carried out electrically operated valve according to temperature, relative humidity, pressure reduction Based Intelligent Control, has stopped the waste of thermal source to greatest extent, it is achieved that be dried the energy source optimization profit of overall process With.
Accompanying drawing explanation
Fig. 1 is structure chart of the present utility model.
Description of reference numerals: 1. hothouse, 2. primary retirn air room, 3. secondary return air cooling chamber, 4. heats up and send Air compartment, 5. surface cooler, 6. compressor, 7. condenser, 8. choke valve, 9. centrifugal blower, 10. plate type heat exchanger, 11. axial flow pumps, 12. charging comminutors, 13. power transmission shafts, 14. conveyer belts, 15. one-way movable dividing plates, 16. send Wind motor-driven valve, 17. primary retirn air motor-driven valves, 18. secondary return air motor-driven valves, 19. hot blast motor-driven valves, 20. hot blasts return Wind motor-driven valve, 21. mixing air ports, 22. casings, 23. discharging openings, 24. water-collecting trays, 25. control main frame, 26. pressures Gap sensor, 27. temperature/relative humidity sensor, 28. bump joints, 29. drainpipes, 30. draining valves, 31. Safety valve.
Detailed description of the invention
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings, enforcement of the present utility model Mode includes but not limited to the following example.
Embodiment
Please participate in shown in Fig. 1, a kind of full automatic high efficiency low temperature dehumidification associating hot-air drying device, including Hothouse 1, primary retirn air room 2, secondary return air cooling chamber 3, intensification plenum chamber 4, casing 22, control main Machine 25, with primary retirn air room 2, secondary return air cooling chamber 3 and intensification plenum chamber on the left of described hothouse 1 4 are connected by air-supply motor-driven valve 16, primary retirn air motor-driven valve 17 and secondary return air motor-driven valve 18 respectively, right Side is provided with hot blast motor-driven valve 19 and hot blast return air motor-driven valve 20, is connected with extraneous hot blast by bump joint 28 , upside is provided with charging comminutor 12, and downside is provided with discharging opening 23, is dried material " upper entering and lower leaving ", enters Material comminutor 12 is placed on conveyer belt 14, discharging opening 23 for the granulating and homogenization cloth being dried material For centralized recovery and the encapsulation of dried material, three layers of conveyer belt 14 in hothouse 1 and power transmission shaft 13 Can realize being dried the automatic transmission of material, be provided with one-way movable dividing plate 15 in hothouse 1 and do for preventing Dry room thermal current " short-circuit ", realize penetrating conveyer belt 14 after the Air Distribution of " under serve back ".Rise Being provided with compressor 6, condenser 7 and choke valve 8 in temperature plenum chamber 4, compressor 6 exports high temperature refrigerant and enters Entering the heating for return air stream after condenser 7, choke valve 8 is for the step-down down cycles of working medium, air-flow Enter hothouse 1 by air-supply motor-driven valve 16 after being heated to the temperature set material is dried;Wear Dry thermal current after ground floor conveyer belt 14 thoroughly, a part enters once by once returning Electric air valve 17 Return air chamber 2, after another part penetrates second, third layer of conveyer belt 14, by secondary returning Electric air valve 18 Enter secondary return air cooling chamber 3;Centrifugal blower 9 it is provided with, pre-for mixed airflow in primary retirn air room 2 Heat is also delivered to intensification plenum chamber 4;Surface cooler 5, plate type heat exchanger 10 it is provided with in secondary return air cooling chamber 3 , axial flow pump 11, mixing air port 21 and water-collecting tray 24, choke valve 8 cryogenic fluid come passes through plate Formula heat exchanger 10 and 11 colds of axial flow pump are transported in surface cooler 5 release, and air-flow is through surface cooler 5 Rear temperature reaches below dew-point temperature and separates out condensation water to after water-collecting tray 24, by drainpipe 29 and draining Valve 30 is automatically discharged into the external world, enters primary retirn air room 2 by mixing air port 19 interior with one after air-flow dehumidifying After the mixing preheating of secondary return air stream, reenter intensification plenum chamber 4 by centrifugal blower 9 and reheat, Complete the circulation of low temperature dehumidification heated-air drying.Safety valve 31 it is provided with, it is achieved dry run close on the upside of casing 33 Envelope, pressure-bearing, heat insulation and stable safety;Differential pressure pickup 26, temperature/the wettest is arranged in hothouse 1 Degree sensor 27, the data gathered transmission, to controlling main frame 25, controls main frame 25 according to set in advance Parameter sends motor-driven valve filter gauze cleaning alarm signal, electrically operated valve open and close controlling signal and motor-driven valve aperture automatically Control signal, it is achieved Automatic Control.
Specific implementation method is as follows:
1. hot blast initial stage drying stage.Control main frame 25 and start charging comminutor 12 and power transmission shaft 13, Material entrance hothouse 1 on the upside of hothouse 1, realizes quilt by three layers of conveyer belt 14 in hothouse 1 Automatically transmitting and being evenly arranged of dried material is in place, controls main frame 25 automatic according to parameter set in advance Send control signal: stop charging comminutor 12 and power transmission shaft 13, open the hot blast electricity on the right side of hothouse 1 Dynamic valve 19, hot blast return air motor-driven valve 20, simultaneously close off the air-supply motor-driven valve 16 on the left of hothouse 1, once Return air motor-driven valve 17, secondary return air motor-driven valve 18, hot blast enters in hothouse 1 from hot blast motor-driven valve 19, Discharge from hot blast return air motor-driven valve 20 after penetrating three layers of conveyer belt 14, it is achieved the air of hothouse 1 is emptied Initial stage with material preheats afterwards;Control main frame 25 to monitor in hothouse 1 from temperature/relative humidity sensor 27 Temperature and relative humidity situation, after in material preheating and hothouse 1, hot-air flow is penetrated into a period of time, Control main frame 25 carries out comprehensive descision according to the rate of change of temperature and the rate of change of relative humidity and automatically sends control Signal processed: close the hot blast motor-driven valve 19 on the right side of hothouse 1, hot blast return air motor-driven valve 20, open simultaneously Air-supply motor-driven valve 16 on the left of hothouse 1, primary retirn air motor-driven valve 17, secondary return air motor-driven valve 18, first Rear startup centrifugal blower 9, axial flow pump 11, compressor 6;Hot blast initial stage drying stage terminates, and enters heat Pump low temperature dehumidification is dried mid-term stage.
2. heat pump low temperature dehumidification is dried mid-term stage.The material being dried through the initial stage is by heating up in plenum chamber 4 The thermal current sent of condenser 7 again heat, hot blast enters hothouse 1 from air-supply motor-driven valve 16 , penetrating the dry thermal current after ground floor conveyer belt 14, a part enters by once returning Electric air valve 17 Primary retirn air room 2, after another part penetrates second, third layer of conveyer belt 14, by secondary returning Electric air valve 18 enter secondary return air cooling chamber 3;Centrifugal blower 9 it is provided with, for mixed airflow in primary retirn air room 2 Preheat and be delivered to intensification plenum chamber 4;Being provided with surface cooler 5 in secondary return air cooling chamber 3, air-flow is through table After cooler 5, temperature reaches below dew-point temperature and separates out condensation water to after water-collecting tray 24, by drainpipe 29 It is automatically discharged into the external world with draining valve 30, after air-flow dehumidifying, enters primary retirn air room 2 by mixing air port 19 In mix with primary retirn air air-flow and to preheat after, reenter intensification plenum chamber 4 by centrifugal blower 9 and carry out again Heating, completes the circulation of low temperature dehumidification heated-air drying;Material heating, in hothouse 1 hot-air flow penetrate, empty Gas dehumidifies after a period of time, controls main frame 25 and carries out according to the rate of change of temperature and the rate of change of relative humidity Comprehensive descision sends control signal automatically: open the hot blast motor-driven valve on the right side of hothouse 1 in setting aperture ratio 19, hot blast return air motor-driven valve 20;Heat pump low temperature dehumidification is dried mid-term stage to be terminated, and enters heat-pump dehumidification and heat The wind combined drying stage.
3. heat-pump dehumidification and hot air combined drying stage.First stage: the relative air humidity of hothouse 1 Continuing the decline stage, a thermal current part for hothouse 1 carries out dehumidifying circulating-heating by heat pump and is dried, separately An outer part is discharged to the external world by hot blast return air motor-driven valve 20, hot blast motor-driven valve 19 and heat on the right side of hothouse 1 The aperture of wind return air motor-driven valve 20 is gradually increased;Second stage: the relative air humidity of hothouse 1 is close Plateau, controls main frame 25 and carries out comprehensive descision according to the rate of change of temperature and the rate of change of relative humidity Automatically control signal is sent: be all turned on the hot blast motor-driven valve 19 on the right side of hothouse 1, hot blast return air motor-driven valve 20, successively close compressor 6, axial flow pump 11, centrifugal blower 9, then simultaneously close off hothouse 1 left The air-supply motor-driven valve 16 of side, primary retirn air motor-driven valve 17, secondary return air motor-driven valve 18;Dry materials complete Entirely being provided by extraneous hot blast, material continues by heated-air drying, and dry indoor air relative humidity reaches to set prison After measured value, control main frame 25 and automatically send control signal: the hot blast on the right side of Close All hothouse 1 is electric Dynamic valve 19 and hot blast return air motor-driven valve 20, the combined drying stage terminates;Control main frame 25 from temperature/relatively Humidity sensor 27 monitors the temperature in hothouse 1 and relative humidity situation, and material is in dry stationary indoors After sultry certain time, control main frame 25 and combine according to the rate of change of temperature and the rate of change of relative humidity Close and judge automatically to send control signal: start power transmission shaft 13, be dried finished product materials and fallen into by conveyer belt 14 Discharging opening 23 is terminated by centralized recovery and encapsulation, material removal moisture drying overall process.
Above-listed detailed description is illustrating for possible embodiments of the present invention, and this embodiment is also not used to Limiting the scope of the claims of utility model of the present invention, all equivalences done without departing from utility model of the present invention are implemented or become More, it is intended to be limited solely by the scope of the claims of this case.

Claims (3)

  1. null1. a full automatic high efficiency low temperature dehumidification associating hot-air drying device,Including hothouse (1),Primary retirn air room (2),Secondary return air cooling chamber (3),Intensification plenum chamber (4),Casing (22),Control main frame (25),It is characterized in that: in described hothouse (1) left side and primary retirn air room (2)、Secondary return air cooling chamber (3) and intensification plenum chamber (4) are respectively by air-supply motor-driven valve (16)、Primary retirn air motor-driven valve (17) and secondary return air motor-driven valve (18) connect,Right side is provided with hot blast motor-driven valve (19) and hot blast return air motor-driven valve (20),It is connected with extraneous hot blast by bump joint (28),Upside is provided with charging comminutor (12),Downside is provided with discharging opening (23),It is dried material " upper entering and lower leaving ",Charging comminutor (12) is placed on conveyer belt (14) for the granulating and homogenization cloth being dried material,Discharging opening (23) is used for centralized recovery and the encapsulation of dried material,Three layers of conveyer belt (14) and power transmission shaft (13) in hothouse (1) can realize being dried the automatic transmission of material,It is provided with one-way movable dividing plate (15) in hothouse (1) to be used for preventing hothouse thermal current " short-circuit "、Realization penetrates the Air Distribution of conveyer belt (14) " under serve back " afterwards.
  2. Full automatic high efficiency low temperature dehumidification the most according to claim 1 associating hot-air drying device, compressor (6), condenser (7) and choke valve (8) it is provided with in it is characterized in that intensification plenum chamber (4), compressor (6) outlet high temperature refrigerant enters condenser (7) afterwards for the heating of return air stream, choke valve (8) is for the step-down down cycles of working medium, and air-flow enters hothouse (1) by air-supply motor-driven valve (16) after being heated to the temperature set and is dried material;Penetrate the dry thermal current after ground floor conveyer belt (14), a part enters primary retirn air room (2) by primary retirn air motor-driven valve (17), after another part penetrates second, third layer of conveyer belt (14), enter secondary return air cooling chamber (3) by secondary return air motor-driven valve (18);Centrifugal blower (9) it is provided with, for the preheating of mixed airflow and be delivered to intensification plenum chamber (4) in primary retirn air room (2);Surface cooler (5) it is provided with in secondary return air cooling chamber (3), plate type heat exchanger (10), axial flow pump (11), mixing air port (21) and water-collecting tray (24), the cryogenic fluid come by choke valve (8) is transported to release in surface cooler (5) by plate type heat exchanger (10) and axial flow pump (11) cold, air-flow temperature after surface cooler (5) reaches below dew-point temperature and separates out condensation water to after water-collecting tray (24), it is automatically discharged into the external world by drainpipe (29) and draining valve (30), after mixing preheating with primary retirn air air-flow in entering primary retirn air room (2) by mixing air port (21) after air-flow dehumidifying, reenter intensification plenum chamber (4) by centrifugal blower (9) to reheat, complete the circulation of low temperature dehumidification heated-air drying.
  3. Full automatic high efficiency low temperature dehumidification the most according to claim 2 associating hot-air drying device, it is characterised in that casing (33) upside is provided with safety valve (31), it is achieved the sealing of dry run, pressure-bearing, heat insulation and stable safety;Differential pressure pickup (26), temperature/relative humidity sensor (27) is arranged in hothouse (1), the data gathered are transmitted to controlling main frame (25), control main frame (25) and automatically send motor-driven valve filter gauze cleaning alarm signal, electrically operated valve open and close controlling signal and motor-driven valve opening control signal according to parameter set in advance, it is achieved Automatic Control.
CN201521055073.7U 2015-12-16 2015-12-16 Joint hot air drying device of full -automatic high -efficient low temperature dehumidification Expired - Fee Related CN205561498U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109579494A (en) * 2018-12-05 2019-04-05 马鞍山金顺来工业设计有限公司 A kind of efficient belt type drying machine
CN110006237A (en) * 2019-03-27 2019-07-12 中国科学院广州能源研究所 Low temperature dehumidification combines hot-air drying device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109579494A (en) * 2018-12-05 2019-04-05 马鞍山金顺来工业设计有限公司 A kind of efficient belt type drying machine
CN110006237A (en) * 2019-03-27 2019-07-12 中国科学院广州能源研究所 Low temperature dehumidification combines hot-air drying device

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