CN102767937B - Greenhouse-type solar heat pump combination drying device and method thereof - Google Patents

Greenhouse-type solar heat pump combination drying device and method thereof Download PDF

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Publication number
CN102767937B
CN102767937B CN201110114354.5A CN201110114354A CN102767937B CN 102767937 B CN102767937 B CN 102767937B CN 201110114354 A CN201110114354 A CN 201110114354A CN 102767937 B CN102767937 B CN 102767937B
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air
greenhouse
valve
heat
heat pump
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CN201110114354.5A
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Chinese (zh)
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CN102767937A (en
Inventor
张振涛
王传奇
杨鲁伟
吕君
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中国科学院理化技术研究所
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Abstract

The invention relates to solar drying devices, and particularly discloses a greenhouse-type solar heat pump combination drying device and a method thereof. The device comprises a greenhouse, an air return fan, a fresh air fan, a drying bed and a control center, wherein the air return fan is arranged inside the greenhouse, one end of the air return fan is an air return port, the other end of the air return fan is an exhaust port and penetrates through the side wall of the greenhouse to extend out of the greenhouse through an air return pipe, the fresh air fan is positioned outside the greenhouse, one end of the fresh air fan is a fresh air port, the other end of the fresh air fan is an air supply port and penetrates through the side wall of the greenhouse to extend into the greenhouse through an air supply pipe, the drying bed is arranged inside the greenhouse, and the control center is connected with the air return fan and the fresh air fan. By the greenhouse-type solar heat pump combination drying device and the method thereof, heat of solar energy can be utilized to heat and dry materials in the greenhouse in an energy-saving and high-efficiency manner.

Description

Greenhouse type combined solar energy heat pump drying device and method

Technical field

The present invention relates to solar drying apparatus technical field, particularly a kind of greenhouse type combined solar energy heat pump drying device and method.

Background technology

Along with deeply carrying out of energy-saving and emission-reduction policy, the utilization of solar energy is more and more extensive, and while the modes such as development solar electrical energy generation, ancient solar thermal utilization is taken seriously again.The solar energy that solar energy heating utilization uses belongs to more low-grade energy, and except being used in except on water heater, in low temperature (< 100 DEG C) dry field, the effect of solar energy just is more and more excavated out.The drying device of solar energy is mainly divided into: greenhouse type, heat collection type and the monolithic devices that both combine.Wherein its greenhouse of greenhouse type solar drying apparatus is exactly hothouse, and hothouse directly accepts the radiant energy of the sun.This drying device is actually the solar energy greenhouse with ventilating capability, and it is mainly held is a little that heat-collecting part and hothouse are combined into one.During work, sunlight is through glass cover-plate direct irradiation on article to be dried, and part sunlight is absorbed by greenhouse wall, so indoor temperature rises gradually, is taken away the moisture of article evaporation by cross-ventilation, and discharges from exhaust chimney, reaches drying purpose.But the heat energy in this traditional structure exhaust directly runs off, and fail to recycle, and when being applicable to industrially drying, energy density is too low, poor continuity, cannot meet the requirement of production.

Summary of the invention

(1) technical problem that will solve

The technical problem to be solved in the present invention be how energy-conservation, utilize solar heat to carry out heat drying to the material in greenhouse efficiently.

(2) technical scheme

In order to solve the problems of the technologies described above, the invention provides a greenhouse type combined solar energy heat pump drying device, comprising:

Greenhouse;

Return air fan, is arranged on described inside greenhouse, and its one end is return air inlet, and the other end is exhaust outlet and reaches outside greenhouse by backwind tube through the sidewall in described greenhouse;

New wind blower fan, be positioned at described greenhouse outside, its one end is fresh wind port, and the other end is air outlet and extend in greenhouse by ajutage through the sidewall in described greenhouse;

Drying bed, is arranged on described inside greenhouse;

Control centre, is connected with described return air fan and new wind blower fan.

Further in technical scheme, also comprise:

Condenser, is positioned at described greenhouse, is arranged on described ajutage, and its one end is described air outlet;

Evaporimeter, is positioned at outside described greenhouse, is connected between described backwind tube and ajutage by evaporation tube, and described evaporimeter is connected with condenser by two loops.

Also comprise:

Expansion valve and compressor, be connected with described control centre, lays respectively in two loops that described evaporimeter is connected with condenser.

Also comprise:

Heat exchanger, is connected between return air fan and evaporimeter by described backwind tube, is connected between evaporimeter and condenser by described ajutage.

Wherein, described evaporimeter is provided with the second air-valve in the evaporation tube of exhaust outlet, and described evaporimeter is provided with the 4th air-valve in the evaporation tube of new wind blower fan, and described second air-valve is all connected with control centre with the 4th air-valve.

One end near exhaust outlet in described backwind tube is provided with the first air-valve, and the one end near new wind blower fan in described ajutage is provided with the 3rd air-valve, and described first air-valve is all connected with control centre with the 3rd air-valve.

Described drying bed is provided with and turns over mud machine.

Described greenhouse inner top is fixed with flow-disturbing blower fan by steelframe.

Described greenhouse is provided with feeding gate and discharge door.

In order to solve the problems of the technologies described above, present invention also offers a kind of greenhouse type combined solar energy heat pump drying means, comprising the following steps:

Step S1, control centre detect solar energy intensity and whether reach the first setting value meeting greenhouse dehumidifying needs, are perform step S2, otherwise judge solar energy intensity whether between the first setting value and the second setting value, are perform step S3;

Step S2, control centre control closedown second air-valve and the 4th air-valve, open the first air-valve and the 3rd air-valve, perform step S21;

Air in step S21, greenhouse to be pumped by return air fan by return air inlet and is discharged through backwind tube and exhaust outlet, and the air outside greenhouse to be pumped by new wind blower fan by fresh wind port and sent in greenhouse through ajutage and air outlet;

Step S3 control centre controls the first air-valve and all opens to the 4th air-valve, and control centre is according to solar energy Strength co-mputation and control the aperture of each air-valve, and determines return air, the flow direction of air-supply and distribution, realizes indoor heat demand balance between supply and demand.

Described step S1 also comprises:

If control centre monitors solar energy intensity lower than the second setting value, then perform step S4.

Also comprise:

Step S4, described control centre control closedown first air-valve and the 3rd air-valve, open the second air-valve and the 4th air-valve, absorbed by the heat pump fluid of evaporimeter from the heat of the damp-heat air in greenhouse in evaporimeter, hydrogenesis in damp-heat air is also discharged, the heat pump fluid of described evaporimeter enters into compressor and is further heated pressurization, heat pump fluid after heating pressurization enters into condenser, carries out heat exchange with the heat pump fluid in condenser; Air dehumidified in evaporimeter also enters into condenser, heat exchange is carried out with the heat pump fluid of condenser, the heat pump fluid temperature of condenser reduces, heat pump fluid after temperature reduces is through expansion valve decrease temperature and pressure further, enter evaporimeter and carry out the heat that next round absorbs damp-heat air, the hot-air after condenser heat exchange is sent in greenhouse by air outlet.

Also comprise:

Preheater, heat exchange is carried out with the air of lowering the temperature through evaporator from the damp-heat air in the greenhouse that return air fan is discharged.

(3) beneficial effect

Technique scheme has following beneficial effect:

1, the invention belongs to the equipment adopting green house solar energy heat to carry out sludge-drying, both met the area needs gathering solar energy, and serve again the effect in mud warehouse, and cost had been far below solar thermal collector;

2, source pump is done supplementing of solar energy by the present invention, does encapsulation process to greenhouse, reclaim the heat in greenhouse as much as possible, and the heat pump efficiency under this operating mode can improve greatly, well reaches efficient, energy-conservation object;

3, the regulative mode (absorbing return air heat or amount of heat) of evaporator with heat pump, tunable carries out while realizing dehumidifying and concurrent heating effect, whole system is run more stable.

Accompanying drawing explanation

Fig. 1 is the structural representation of the greenhouse type combined solar energy heat pump drying device of the embodiment of the present invention;

Fig. 2 is the sectional view of the greenhouse type combined solar energy heat pump drying device of the embodiment of the present invention;

Fig. 3 is the top view of the greenhouse type combined solar energy heat pump drying device of the embodiment of the present invention;

Fig. 4 is the part-structure schematic diagram of the greenhouse type combined solar energy heat pump drying device of the embodiment of the present invention;

Fig. 5 is the flow chart of the greenhouse type combined solar energy heat pump drying means of the embodiment of the present invention.

Wherein, 1: greenhouse; 2: backwind tube; 3: ajutage; 4: return air inlet; 5: return air fan; 6: heat exchanger; 7: the second air-valves; 8: the first air-valves; 9: exhaust outlet; 10: evaporimeter; 11: condenser; 12: air outlet; 13: the three air-valves; 14: the four air-valves; 15: new wind blower fan; 16: fresh wind port; 17: discharge door; 18: feeding gate; 19: turn over mud machine; 20: flow-disturbing blower fan; 21: steelframe; 23: drying bed; 24: sludge material; 25: expansion valve; 26: compressor; 27: evaporation tube.

Detailed description of the invention

Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.

As shown in Figure 1, be the structural representation of greenhouse type combined solar energy heat pump drying device of the embodiment of the present invention; This device comprises greenhouse 1, return air fan 5, heat exchanger 6, condenser 11, evaporimeter 10, new wind blower fan 15, compressor 26, expansion valve 25, several air-valves and control centre's (not shown).Wherein condenser 11, evaporimeter 10, compressor 26 and expansion valve 25 form source pump.

Wherein, greenhouse 1 adopts PC sunlight board to make, or the part PC sunlight board that the top in greenhouse 1 and sidepiece can by sunlight makes.There is return air fan 5 inside, greenhouse 1, one end of return air fan 5 is return air inlet 4, the other end is connected with the heat pump preheating heat exchanger 6 outside greenhouse 1 through the sidewall in greenhouse 1 by backwind tube 2, and backwind tube 2 continues after connecting heat exchanger 6 to extend, and another end of backwind tube 2 is exhaust outlet 9.The inside in greenhouse 1 is provided with condenser 11, one end of condenser 11 is air outlet 12, and the other end is connected with heat exchanger 6 by the sidewall of ajutage 3 through greenhouse 1, and ajutage 3 continues after connecting heat exchanger 6 to extend, be connected with new wind blower fan 15, the other end of new wind blower fan 15 is fresh wind port 16.

Backwind tube 2 is also connected with evaporimeter 10 by evaporation tube 27 with ajutage 3, and evaporation tube 27 is provided with the second air-valve 7 near the position of backwind tube 2, and evaporation tube 27 is provided with the 4th air-valve 14 near the position of ajutage 3.Position in backwind tube 2 between exhaust outlet 9 and the second air-valve 7 is provided with the first air-valve 8, and the position in ajutage 3 between new wind blower fan 15 and the 4th air-valve 14 is provided with the 3rd air-valve 13.Each air-valve is all connected with control centre.

Evaporimeter 10 is also connected with condenser 11 with expansion valve 25 respectively by compressor 26.Wherein compressor 26 is positioned at greenhouse 1, and expansion valve 25 is positioned at outside greenhouse 1.Compressor 26 is connected with control centre with expansion valve 25.

Drying bed 23 is provided with, for placing sludge material 24 in greenhouse 1.Greenhouse 1 being provided with feeding gate 18 and discharge door 17, for sludge material 24 being sent into the drying bed 23 of inside, greenhouse 1, and dried sludge material 24 being sent.Drying bed 23 is provided with track between feeding gate 18 and discharge door 17, track turns over mud machine 27 and moves back and forth along track, and the compact texture that the mummification surface constantly destroying sludge material 7 is formed improves moisture expulsion efficiency.

Greenhouse 1 inner top is fixed with flow-disturbing blower fan 20 by steelframe 21, for drying to sludge material 7, the air in greenhouse 1 being seethed up and down moisture is fully spread wherein.

As shown in Figure 5, be the flow chart of the greenhouse type combined solar energy heat pump drying means of the embodiment of the embodiment of the present invention, be also the principle of device provided by the invention, comprise the steps:

Step S1, control centre detect solar energy intensity and whether are greater than the first setting value meeting greenhouse dehumidifying needs, are perform step S2, otherwise judge solar energy intensity whether between the first setting value and the second setting value, then execution step S3; If when solar energy intensity is lower than the second setting value, perform step S4;

Step S2, control centre control closedown second air-valve and the 4th air-valve, and judge whether to reach default release, are perform step S21;

Step S21, open the first air-valve and the 3rd air-valve, in greenhouse, the air of high temperature high water capacity is pumped by return air fan by return air inlet, and discharge through backwind tube and exhaust outlet, the air of the low water capacity of low temperature to be pumped by new wind blower fan by fresh wind port and in ajutage and air outlet feeding greenhouse in the greenhouse outside;

This part ozone, through the heating of warm indoor solar, becomes again the air of high temperature high water capacity, has taken away the moisture in mud during discharge in passing, arrives the object of dehumidifying.

Step S3, control centre judge whether to reach default release, control the first air-valve and all open to the 4th air-valve, control centre is according to solar energy Strength co-mputation and control the aperture of each air-valve, determine the unlatching of source pump, and determine return air, the flow direction of air-supply and distribution, realize indoor heat demand balance between supply and demand.

Step S4, control centre control closedown first air-valve and the 3rd air-valve, open the second air-valve and the 4th air-valve.Open source pump, particularly, absorbed in evaporimeter from the heat of the damp-heat air in greenhouse by the heat pump fluid of evaporimeter, the hydrogenesis in damp-heat air is also discharged, thus reaches the object of damp-heat air dehumidifying in greenhouse; This heat pump fluid enters into compressor and is further heated pressurization, and the heat pump fluid after heating pressurization enters into condenser, carries out heat exchange with the heat pump fluid in condenser; The heat pump fluid that its heat is condensed in device absorbs, air in evaporimeter after dehumidified cooling enters into condenser, the heat of the heat pump fluid of condenser is entered the absorption of air of condenser, heat pump fluid temperature reduces, heat pump fluid after temperature reduces, through expansion valve decrease temperature and pressure further, enters evaporimeter and carries out the heat that next round absorbs damp-heat air; And the hot-air after condenser heat exchange continues to enter in greenhouse by air outlet.The damp-heat air of simultaneously discharging from return air fan in greenhouse also carries out taking turns heat exchange, to make full use of the heat of damp-heat air in greenhouse with the air of lowering the temperature through evaporator preheater.

According to actual conditions, when the heat of indoor damp-heat air is not enough, can also can also introduce other thermals source at evaporimeter place, as surrounding air or water, heat pump just can absorb the heat dissipation capacity in extraneous heat supplement greenhouse, reaches balance.

When after employing said apparatus and method, compared with prior art, the present invention has following beneficial effect:

1, the invention belongs to the equipment adopting green house solar energy heat to carry out sludge-drying, both met the area needs gathering solar energy, and serve again the effect in mud warehouse, and cost had been far below solar thermal collector;

2, source pump is done supplementing of solar energy by the present invention, does encapsulation process to greenhouse, reclaim the heat in greenhouse as much as possible, and the heat pump efficiency under this operating mode can improve greatly, well reaches efficient, energy-conservation object;

3, the regulative mode (absorbing return air heat or amount of heat) of evaporator with heat pump, tunable carries out while realizing dehumidifying and concurrent heating effect, whole system is run more stable.

The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and modification, these improve and modification also should be considered as protection scope of the present invention.

Claims (6)

1. greenhouse type combined solar energy heat pump drying device, is characterized in that, comprising:
Greenhouse, described greenhouse inner top is fixed with flow-disturbing blower fan by steelframe;
Return air fan, is arranged on described inside greenhouse, and its one end is return air inlet, and the other end is exhaust outlet and reaches outside greenhouse by backwind tube through the sidewall in described greenhouse;
New wind blower fan, be positioned at described greenhouse outside, its one end is fresh wind port, and the other end is air outlet and extend in greenhouse by ajutage through the sidewall in described greenhouse;
Drying bed, is arranged on described inside greenhouse, described drying bed is provided with and turns over mud machine;
Control centre, is connected with described return air fan and new wind blower fan;
Greenhouse type combined solar energy heat pump drying device also comprises source pump, and described source pump comprises:
Condenser, is positioned at described greenhouse, is arranged on described ajutage, and its one end is described air outlet;
Evaporimeter, is positioned at outside described greenhouse, is connected between described backwind tube and ajutage by evaporation tube, and described evaporimeter is connected with condenser by two loops; Described evaporimeter is provided with the second air-valve in the evaporation tube of exhaust outlet, and described evaporimeter is provided with the 4th air-valve in the evaporation tube of new wind blower fan, and described second air-valve is all connected with control centre with the 4th air-valve; One end near exhaust outlet in described backwind tube is provided with the first air-valve, and the one end near new wind blower fan in described ajutage is provided with the 3rd air-valve, and described first air-valve is all connected with control centre with the 3rd air-valve;
Expansion valve and compressor, be connected with described control centre, lays respectively in two loops that described evaporimeter is connected with condenser;
Heat exchanger, is connected between return air fan and evaporimeter by described backwind tube, is connected between evaporimeter and condenser by described ajutage.
2. greenhouse type combined solar energy heat pump drying device as claimed in claim 1, its feature in, described greenhouse is provided with feeding gate and discharge door.
3. a drying means for the greenhouse type combined solar energy heat pump drying device according to any one of claim 1-2, is characterized in that, comprise the following steps:
Step S1, control centre detect solar energy intensity and whether are greater than the first setting value meeting greenhouse dehumidifying needs, are perform step S2, otherwise judge solar energy intensity whether between the first setting value and the second setting value, are perform step S3;
Step S2, control centre control closedown second air-valve and the 4th air-valve, and judge whether to reach default release, are perform step S21;
Step S21, open the first air-valve and the 3rd air-valve, the air in greenhouse to be pumped by return air fan by return air inlet and is discharged through backwind tube and exhaust outlet, and the air outside greenhouse to be pumped by new wind blower fan by fresh wind port and sent in greenhouse through ajutage and air outlet;
Step S3, control centre judge whether to reach default release, control the first air-valve and all open to the 4th air-valve, the aperture of each air-valve is controlled according to solar energy Strength co-mputation by control centre, determine the unlatching of source pump, and determine return air, the flow direction of air-supply and distribution, realize indoor heat demand balance between supply and demand.
4. greenhouse type combined solar energy heat pump drying means as claimed in claim 3, it is characterized in that, described step S1 also comprises:
If control centre monitors solar energy intensity lower than the second setting value, then perform step S4.
5. greenhouse type combined solar energy heat pump drying means as claimed in claim 4, is characterized in that, also comprise:
Step S4, described control centre control closedown first air-valve and the 3rd air-valve, open the second air-valve and the 4th air-valve, and control to open source pump: absorbed by the heat pump fluid of evaporimeter from the heat of the damp-heat air in greenhouse in evaporimeter, hydrogenesis in damp-heat air is also discharged, the heat pump fluid of described evaporimeter enters into compressor and is further heated pressurization, heat pump fluid after heating pressurization enters into condenser, carries out heat exchange with the heat pump fluid in condenser; Air dehumidified in evaporimeter also enters into condenser, heat exchange is carried out with the heat pump fluid of condenser, the heat pump fluid temperature of condenser reduces, heat pump fluid after temperature reduces is through expansion valve decrease temperature and pressure further, enter evaporimeter and carry out the heat that next round absorbs damp-heat air, the hot-air after condenser heat exchange is sent in greenhouse by air outlet.
6. greenhouse type combined solar energy heat pump drying means as claimed in claim 5, is characterized in that, also comprise:
Preheater, heat exchange is carried out with the air of lowering the temperature through evaporator from the damp-heat air in the greenhouse that return air fan is discharged.
CN201110114354.5A 2011-05-04 2011-05-04 Greenhouse-type solar heat pump combination drying device and method thereof CN102767937B (en)

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CN102923929B (en) * 2012-12-03 2013-10-30 湖北国新天汇能源有限公司 Method and device for drying sludge through solar energy
CN103471345B (en) * 2013-09-17 2015-02-04 东莞市风火轮热能科技有限公司 Method for drying industrial materials by using high-temperature heat pump and radiation
CN103512342B (en) * 2013-09-18 2016-03-23 江门市华延自动化设备制造有限公司 A kind of energy-saving heat pump hydrofuge drying room and control method thereof
CN103693829A (en) * 2013-12-23 2014-04-02 常州市新港热电有限公司 Sludge treatment equipment and process
CN103743199A (en) * 2014-01-24 2014-04-23 王兢 Turning based wet stock drying method and turning based wet stock drying system
CN103983095B (en) * 2014-05-26 2016-04-20 常州海卡太阳能热泵有限公司 Heat-recovery heat pump and the heat pump united drying system of energy-storage solar and control method
CN105854321B (en) * 2016-06-03 2017-12-19 苟仲武 A kind of method and apparatus of evaporation drying material
CN107178995A (en) * 2017-04-21 2017-09-19 云南省烟草公司昆明市公司 A kind of hot and humid gas dehumidification, waste heat recovery and heating integrated machine
CN109059438A (en) * 2018-06-25 2018-12-21 安徽省兴万信息技术有限公司 A kind of mixing drier for clothes processing
CN110873517A (en) * 2018-08-30 2020-03-10 北京航空航天大学 Photovoltaic drive solar heat pump dryer

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DE10336685A1 (en) * 2003-08-09 2005-03-03 Karl Kraus Process for drying wet product, especially slurry, in at least one drying step comprises spreading the wet product on a heated base and rotating it at intervals
CN100559103C (en) * 2007-02-09 2009-11-11 王明根 Solar energy, high-temperature double heat source heat pump sludge dry system
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