CN103134121A - Membrane method dehumidification device and method based on vapor compression and solution absorption - Google Patents
Membrane method dehumidification device and method based on vapor compression and solution absorption Download PDFInfo
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- CN103134121A CN103134121A CN2013100537553A CN201310053755A CN103134121A CN 103134121 A CN103134121 A CN 103134121A CN 2013100537553 A CN2013100537553 A CN 2013100537553A CN 201310053755 A CN201310053755 A CN 201310053755A CN 103134121 A CN103134121 A CN 103134121A
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Abstract
The invention discloses a membrane method dehumidification device based on vapor compression and solution absorption. The membrane method dehumidification device comprises a vapor compression refrigeration circulation loop, an air circulation loop and a solution circulation loop. The vapor compression refrigeration circulation loop, the air circulation loop and the solution circulation loop are connected in sequence. The invention further discloses a dehumidification method based on the membrane method dehumidification device. The method comprises the steps of vapor compression refrigeration circulation, air circulation and solution circulation. A high-pressure refrigerant at a condenser outlet enters an expansion compressor to be expanded, and pressure of to-be-treated air is increased; after pressure increase, the air enters a membrane assembly, a humidity load of the air is removed, and the dehumidified air enters an evaporator to remove a sensible heat load; and vapor on the low pressure side of the membrane assembly is absorbed through an absorber, pressure of the low pressure side of the membrane assembly is maintained, and the membrane dehumidification process is performed smoothly. The membrane method dehumidification device and method not only increase refrigerating capacity and enable a whole system to be efficient and energy-saving, but also can be used for dehumidification efficiently and stably, and renewable energy is effectively utilized.
Description
Technical field
The present invention relates to a kind of device and method of dehumidifying, particularly a kind of based on the device and method steam compressed and membrane method dehumidifying that solution absorbs.
Background technology
At present, air-conditioning system generally adopts dehumidification by condensation mode (adopting the chilled water of 7 ℃) realization to cooling and the dehumidification treatments of air, remove simultaneously sensible heat load and the latent heat load (humidity load) of building, caused energy to utilize waste on grade, the moist surface that while dehumidification by condensation mode produces becomes the good place of the biological pollutant breedings such as mould, has a strong impact on indoor air quality.That the embrane method dehumidification has is energy-conservation, clean, equipment is simple, the advantage such as easy to operate, is applied at aspects such as dehumidification of compressed airs at present.
In the membrane method dehumidifying process, be to guarantee carrying out smoothly of process of osmosis, before and after film, both sides need to keep certain pressure reduction, at present the normal method that adopts be before film with force (forcing) pump to air pressurized, force (forcing) pump becomes one of main power consumption parts of membrane method dehumidifying; The steam that sees through simultaneously film can accumulate in the downstream of film, make the Efficiency Decreasing of membrane module, must manage in time to remove the steam that the film downstream is gathered, drying could successfully carry out continuously, the normal method that adopts is that vavuum pump vacuumizes or the sweep gas method at present, the former power consumption is larger, latter's loss portioned product gas.Therefore, novel, efficient, the energy-conservation membrane method dehumidifying mode tool of research has very important significance.
Summary of the invention
Goal of the invention: for low, the not energy-conservation problem and shortage of dehumidification rate that above-mentioned prior art exists, the purpose of this invention is to provide a kind of based on the device steam compressed and membrane method dehumidifying that solution absorbs.
Technical scheme: for achieving the above object, the invention provides a kind of device of the membrane method dehumidifying that absorbs based on steam compressed and solution, comprise Vapor Compression Refrigeration Cycle loop, air circulation loop and solution circulation loop, wherein,
The Vapor Compression Refrigeration Cycle loop comprises compressor, condenser, expansion-compressor, choke valve and evaporimeter;
The output of compressor is connected with the input of condenser, the output of condenser is connected with the expander inlet of expansion-compressor, the decompressor outlet of expansion-compressor is connected with the first input end of evaporimeter by choke valve, and the first output of evaporimeter is connected with the input of compressor;
Air circulation loop comprises expansion-compressor, membrane module and evaporimeter;
The compressor outlet of expansion-compressor is connected with the high-pressure side input of membrane module, and the high-pressure side output of membrane module is connected with the second input of evaporimeter;
Solution circulation loop comprises membrane module, absorber, chilled water unit, solution pump, solution heat exchanger, low-grade heat source, heater, open type heat and mass exchanger, solution choke valve and blower fan;
the low-pressure side output of membrane module is connected with the first input end of absorber, the first output of absorber is connected with the first input end of solution heat exchanger by solution pump, the first output of solution heat exchanger is connected with the first input end of heater, the output of heater is connected with the first input end of open type heat and mass exchanger, the output of open type heat and mass exchanger is connected with the second input of solution heat exchanger, the second output of solution heat exchanger is connected with the second input of absorber by the solution choke valve, blower fan connects the second input of open type heat and mass exchanger.
Wherein, heater is preferably the heater that adopts low-grade heat source to drive.
Further, the heater of heater for adopting the low-temperature waste heat coil pipe to drive.
Further, absorber is for adopting the absorber of cooling water coil.
It is a kind of based on the steam compressed membrane method dehumidifying method that absorbs with solution that the present invention also provides,
Step 1: by the high-pressure refrigerant of expansion-compressor expansion condenser output, the pressure and temperature of cold-producing medium is reduced, after the cold-producing medium process choke valve and evaporimeter of the output of expansion-compressor, enter compressor, the high-pressure refrigerant after compression enters condenser condenses;
Step 2: by expansion-compressor, air is pressurizeed, under the poor effect of steam partial pressure, airborne part steam permeates away through membrane module;
Step 3: the air after dehumidifying enters evaporimeter, removes the sensible heat load of air;
Step 4: absorber absorbs the steam that penetrates by membrane module, solution concentration after concentrated solution moisture absorption in absorber reduces, weak solution is pressurized to normal pressure through solution pump, weak solution after pressurization enters the open type heat and mass exchanger through solution heat exchanger and heater, carry out the caloic exchange with outdoor air under normal pressure, solution concentration increases;
Step 5: to pressure corresponding to membrane module low-pressure side, the concentrated solution after step-down enters absorber to concentrated solution through solution choke valve reducing pressure by regulating flow.
Beneficial effect: the present invention has compared with prior art not only effectively increased refrigerating capacity, makes whole system energy-efficient, and the dehumidifying of energy efficient stable, effectively utilizes regenerative resource.
Description of drawings
Fig. 1 is structural representation of the present invention.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, further illustrate the present invention, should understand these embodiment only is used for explanation the present invention and is not used in and limits the scope of the invention, after having read the present invention, those skilled in the art all fall within the application's claims limited range to the modification of the various equivalent form of values of the present invention.
as shown in Figure 1, the output of compressor 1 is connected with the input of condenser 2, the output of condenser 2 is connected with the expander inlet of expansion-compressor 3, the decompressor outlet of expansion-compressor 3 is connected with evaporimeter 5 first input ends by choke valve 4, and the first output of evaporimeter 5 is connected with the input of compressor 1, the compressor outlet of expansion-compressor 3 is connected with the high-pressure side input of membrane module 6, and the high-pressure side output of membrane module 6 is connected with the second input of evaporimeter 5, the low-pressure side output of membrane module 6 is connected with the first input end of absorber 7, the first output of absorber 7 is connected with the first input end of solution heat exchanger 10 by solution pump 9, the first output of solution heat exchanger 10 is connected with the first input end of heater 12, the first output of heater 12 is connected with the first input end of open type heat and mass exchanger 13, the second input of the output termination solution heat exchanger 10 of open type heat and mass exchanger 13, the second output of solution heat exchanger 10 is connected with the second input of absorber 7 by solution choke valve 14, blower fan 15 connects the second input of open type heat and mass exchanger 13, wherein, low-temperature waste heat coil pipe 11 is arranged in heater 12, cooling water coil 8 is arranged in absorber 7.
The present invention also provides a kind of dehumanization method based on said apparatus, and the method mainly comprises Vapor Compression Refrigeration Cycle, air circulation and three processes of solution circulation;
In the Vapor Compression Refrigeration Cycle process, the high-pressure refrigerant of condenser 2 outlets enters expansion-compressor 3 and expands, the pressure and temperature of cold-producing medium reduces, process choke valve 4 reducing pressure by regulating flows are to evaporating pressure and evaporating temperature, the refrigerants vaporize heat absorption produces cold in evaporimeter 5, after compressor 1 compression, enter condenser 2 and be condensed into high pressure refrigerant liquid.
In air circulation process, adopt 3 pairs of air of expansion-compressor to pressurize, improve the air pressure that enters in membrane module 6, make the high-pressure side of membrane module 6 keep higher pressure, under the poor effect of steam partial pressure, airborne part steam permeates away through film, in air, water capacity reduces, realize the purpose of dehumidifying, the air after dehumidifying enters evaporimeter 5, removes the sensible heat load of air;
in the solution circulation process, utilize and have the steam that stronger hygroscopic concentrated solution absorbing film assembly 6 high-pressure sides penetrate in absorber 7, keep the lower pressure of membrane module 6 low-pressure sides, the air dewetting process is carried out smoothly, solution concentration after moisture absorption reduces, weak solution is pressurized to normal pressure through solution pump 9, weak solution after pressurization enters open type heat and mass exchanger 13 through solution heat exchanger 10 and heater 12, carry out the caloic exchange with outdoor air under normal pressure, solution concentration is increased, concentrated solution process solution choke valve 14 reducing pressure by regulating flows are to pressure corresponding to membrane module 6 low-pressure sides, concentrated solution after step-down enters absorber 7.
The present invention utilizes expansion-compressor to reclaim the expansion work of the high-pressure refrigerant of condensator outlet, and refrigerating capacity increases, and coefficient of refrigerating performance improves, and utilizes simultaneously expansion-compressor that air is pressurizeed, and keeps the higher pressure in membrane module high-pressure side; Keep the pressure of membrane module low-pressure side by solution circulation, make the larger pressure reduction of film both sides existence, guarantee carrying out smoothly of process of osmosis, improve dehumidification rate.The present invention is comprised of Vapor Compression Refrigeration Cycle, air circulation and solution circulation, and the binding site of circulation is expansion-compressor, evaporimeter and membrane module.
The present invention utilizes the sun, low-temperature waste heat coil pipe to drive the low-grade heat source driving open type heat and mass exchangers such as energy, improve the steam partial pressure on weak solution surface, under the poor effect of steam partial pressure, steam in weak solution is taken away discharge by air, solution concentration after regeneration gets a promotion, after solution heat exchanger heat exchange, solution choke valve, enter in absorber, the steam that the absorbing film downstream is gathered, guaranteed carrying out smoothly of film dehumidification process, the absorption heat that produces in the absorption process water that is cooled is taken away, and absorption process is fully carried out.
Claims (4)
1. membrane method dehumidifying device that absorbs based on steam compressed and solution is characterized in that:
The output of compressor (1) is connected with the input of condenser (2), the output of condenser (2) is connected with the expander inlet of expansion-compressor (3), the decompressor outlet of expansion-compressor (3) is connected with the first input end of evaporimeter (5) by choke valve (4), and the first output of evaporimeter (5) is connected with the input of compressor (1); The compressor outlet of expansion-compressor (3) is connected with the high-pressure side input of membrane module (6), and the high-pressure side output of membrane module (6) is connected with the second input of evaporimeter (5);
the low-pressure side output of membrane module (6) is connected with the first input end of absorber (7), the first output of absorber (7) is connected with the first input end of solution heat exchanger (10) by solution pump (9), the first output of solution heat exchanger (10) is connected with the first input end of heater (12), the output of heater (12) is connected with the first input end of open type heat and mass exchanger (13), the output of open type heat and mass exchanger (13) is connected with the second input of solution heat exchanger (10), the second output of solution heat exchanger (10) is connected with the second input of absorber (7) by solution choke valve (14), blower fan (15) connects the second input of open type heat and mass exchanger (13).
2. according to claim 1 a kind of based on the steam compressed membrane method dehumidifying device that absorbs with solution, it is characterized in that: the heater of described heater (12) for adopting low-temperature waste heat coil pipe (11) to drive.
3. according to claim 1 a kind of based on the steam compressed membrane method dehumidifying device that absorbs with solution, it is characterized in that: described absorber (7) is for adopting the absorber of cooling water coil (8).
4. membrane method dehumidifying method that absorbs based on steam compressed and solution is characterized in that:
Step 1: by the high-pressure refrigerant of expansion-compressor expansion condenser output, the pressure and temperature of cold-producing medium is reduced, after the cold-producing medium process choke valve and evaporimeter of the output of expansion-compressor, enter compressor, the high-pressure refrigerant after compression enters condenser condenses;
Step 2: by expansion-compressor, air is pressurizeed, under the poor effect of steam partial pressure, airborne part steam permeates away through membrane module;
Step 3: the air after dehumidifying enters evaporimeter, removes the sensible heat load of air;
Step 4: absorber absorbs the steam that penetrates by membrane module, solution concentration after concentrated solution moisture absorption in absorber reduces, weak solution is pressurized to normal pressure through solution pump, weak solution after pressurization enters the open type heat and mass exchanger through solution heat exchanger and heater, carry out the caloic exchange with outdoor air under normal pressure, solution concentration increases;
Step 5: to pressure corresponding to membrane module low-pressure side, the concentrated solution after step-down enters absorber to concentrated solution through solution choke valve reducing pressure by regulating flow.
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Cited By (3)
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| WO2019062443A1 (en) * | 2017-09-30 | 2019-04-04 | 青岛海尔空调电子有限公司 | Dehumidification system, air conditioner and dehumidification control method |
| CN110908419A (en) * | 2019-11-04 | 2020-03-24 | 北京航空航天大学 | Thermoelectric refrigeration and moisture permeable film combined temperature and humidity control system |
| CN112879995A (en) * | 2021-02-05 | 2021-06-01 | 云南电网有限责任公司电力科学研究院 | Water-medium high-temperature heat supply heat pump system capable of recycling waste heat |
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| WO2019062443A1 (en) * | 2017-09-30 | 2019-04-04 | 青岛海尔空调电子有限公司 | Dehumidification system, air conditioner and dehumidification control method |
| CN110908419A (en) * | 2019-11-04 | 2020-03-24 | 北京航空航天大学 | Thermoelectric refrigeration and moisture permeable film combined temperature and humidity control system |
| CN110908419B (en) * | 2019-11-04 | 2022-03-04 | 北京航空航天大学 | Thermoelectric refrigeration and moisture permeable film combined temperature and humidity control system |
| CN112879995A (en) * | 2021-02-05 | 2021-06-01 | 云南电网有限责任公司电力科学研究院 | Water-medium high-temperature heat supply heat pump system capable of recycling waste heat |
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