CN116950184A - Multi-stage air water taking system based on thermal response polymer and operation method - Google Patents
Multi-stage air water taking system based on thermal response polymer and operation method Download PDFInfo
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- CN116950184A CN116950184A CN202310589668.3A CN202310589668A CN116950184A CN 116950184 A CN116950184 A CN 116950184A CN 202310589668 A CN202310589668 A CN 202310589668A CN 116950184 A CN116950184 A CN 116950184A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 240
- 229920000642 polymer Polymers 0.000 title claims abstract description 168
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000009833 condensation Methods 0.000 claims abstract description 50
- 238000001179 sorption measurement Methods 0.000 claims description 45
- 230000005494 condensation Effects 0.000 claims description 27
- 239000000498 cooling water Substances 0.000 claims description 27
- 230000018044 dehydration Effects 0.000 claims description 23
- 238000006297 dehydration reaction Methods 0.000 claims description 23
- 239000007788 liquid Substances 0.000 claims description 18
- 238000007872 degassing Methods 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 12
- 230000007704 transition Effects 0.000 claims description 11
- 238000001035 drying Methods 0.000 claims description 3
- 238000011017 operating method Methods 0.000 claims 4
- 238000005265 energy consumption Methods 0.000 abstract description 16
- 238000003795 desorption Methods 0.000 abstract description 8
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 238000004378 air conditioning Methods 0.000 abstract description 3
- 238000009423 ventilation Methods 0.000 abstract description 2
- 239000003651 drinking water Substances 0.000 description 6
- 235000020188 drinking water Nutrition 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 229920000128 polypyrrole Polymers 0.000 description 6
- QNILTEGFHQSKFF-UHFFFAOYSA-N n-propan-2-ylprop-2-enamide Chemical compound CC(C)NC(=O)C=C QNILTEGFHQSKFF-UHFFFAOYSA-N 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 239000003507 refrigerant Substances 0.000 description 4
- 229920001187 thermosetting polymer Polymers 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000741 silica gel Substances 0.000 description 3
- 229910002027 silica gel Inorganic materials 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 238000007791 dehumidification Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000008213 purified water Substances 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 240000005049 Prunus salicina Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 235000009018 li Nutrition 0.000 description 1
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000002336 sorption--desorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
- E03B3/28—Methods or installations for obtaining or collecting drinking water or tap water from humid air
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
- F24F13/222—Means for preventing condensation or evacuating condensate for evacuating condensate
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
- F24F3/1411—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by absorbing or adsorbing water, e.g. using an hygroscopic desiccant
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Gases (AREA)
Abstract
The application belongs to the field of heating ventilation air conditioning systems, and discloses a multi-stage air water taking system based on a thermal response polymer and an operation method thereof. The system operates through valve switching and double-gear operation of the post-condensation water collector and the heater, and matches the multi-stage desorption characteristics of the thermally-responsive polymer, so that multi-equipment and multi-stage atmospheric water collection is realized. The system is matched with a corresponding operation method, so that moisture in air can be fully collected, and meanwhile, the system at each stage is ensured to operate in a mode of lowest energy consumption, and low-energy consumption air water taking is realized.
Description
Technical Field
The application belongs to the field of heating ventilation and air conditioning systems, and relates to a multi-stage air water taking system based on a thermal response polymer and an operation method.
Background
Atmospheric water collection, also known as "water from air". The water taking in the air is a method for researching the conversion of water in the air into drinking water by Robert Rabi Geer working at the university of Japanese plum in Germany, which provides an inexhaustible 'natural reservoir' for people living in the desert. He used an adsorbent, a large planar polymeric material, which absorbs moisture from the air at night and releases water after being heated during the day. The device is completely powered by solar energy to supply heat, and can be used in areas without a power grid, and the core technology is to absorb moisture in air by utilizing the moisture absorption effect of salt water. The Rabi Geer selects corresponding adsorption materials for tropical countries and temperate regions respectively, and a device with the size of 1 cubic meter can produce 1000 liters of drinking water in one day and night.
Domestic scholars have also invented a device for taking water from the air. The device for taking water from air, which is applied for patent by Shanghai transportation university in 2004, comprises a compressor, a water generator, a sterilizing ultraviolet lamp, an activated carbon purifier and the like. The refrigerant compressed by the compressor is condensed by the condenser, enters the water generator through capillary throttling to evaporate and absorb heat, external air is forced to exchange heat with the water generator through the fan in a convection way, water in the refrigerant is condensed outside the water generator and flows into the water receiving disc at the lower part of the water generator, the water in the water receiving disc is sterilized and disinfected by the sterilizing ultraviolet lamp above the water receiving disc, and then the water is filtered by the active carbon purifier and flows into the two water reservoirs of hot water and cold water respectively. Part of the condensation heat of the refrigerant gas is dissipated by the tube-fin condenser, the other part is used for heating purified water in the hot water drinking water reservoir, part of the evaporation cold energy of the refrigerant liquid is used for making water by the water making device, and the other part is used for cooling the purified water in the cold water drinking water reservoir, so that a user can directly drink the water through the hot water tap and the cold water tap connected with the hot water drinking water reservoir and the cold water drinking water reservoir respectively (patent application number: 200410016871).
The application discloses a heat pipe low-temperature evaporation end dew water collector (Chinese application number 201410060859.1) at the construction university Wang Haitao of Anhui, 30 days, 9 months, 2015, without consuming any energy. The device exchanges heat between heat in soil and air on the surface of the water collector by utilizing the heat conducting property of the heat pipe in daytime, the condensing end of the heat pipe penetrates into the ground, the upper evaporation end is connected with the metal water collecting disc to transfer the heat in the air to the heat pipe through the water collecting disc, and then the heat is transferred into the ground through the heat pipe to exchange heat with the constant-temperature soil, so that the surface temperature of the metal water collecting disc is reduced below the dew point temperature of the air, and water is condensed. At night, the air temperature is lower than the soil temperature, the heat pipe stops working, and at the moment, the air temperature on the surface of the water collector is quickly reduced to be lower than the dew point temperature by utilizing the heat convection of the metal surface of the water collector and the air, so that water is separated out for use. However, such a water collector has a high degree of dependence on weather and has a lot of uncertainty.
The traditional atmosphere water collecting technology mainly collects liquid water in a condensation mode or a mode of combining solid adsorption such as silica gel and the like with the condensation technology, but the condensation mode is limited by evaporation temperature, and the collected liquid water quantity is limited; the combination of solid adsorption and condensation techniques typically requires higher regeneration temperatures throughout the process, resulting in higher energy consumption of the system. The thermally responsive polymer has the characteristic of a volume phase transition temperature, i.e., can adsorb water vapor from air when the polymer temperature is below the volume phase transition temperature; above the volume phase transition temperature, the polymer molecular chain can shrink and drain liquid water, realize the liquid water collection of atmospheric environment. However, the desorption amount of liquid water of the thermally responsive polymer is only about 50% of the equilibrium adsorption amount, and the residual water affects the adsorption effect on one hand and cannot effectively improve the collection amount of liquid water.
Disclosure of Invention
The technical problem to be solved by the application is to provide an energy-saving air water taking system, which saves energy consumption while achieving the purpose of collecting water from the atmosphere by a multi-stage air water taking method based on a heat response polymer.
In view of the above state of the art, the present application combines condensation dehumidification technology with multistage dehydration characteristics of a thermally responsive polymer, collects moisture of a part of the atmospheric environment by using pre-cooling technology, and simultaneously reduces the temperature of air entering the thermally responsive polymer, thereby improving adsorption capacity and adsorption efficiency; meanwhile, the high-efficiency liquid water desorption capacity of the system is ensured through the multi-stage matching operation of the aftercooler and the regenerative heater. Through the technology, on one hand, the liquid water collection amount of the system can be improved, on the other hand, the system can be operated in the mode of lowest energy consumption in the whole stage, and the air water collection amount of unit energy consumption of the system is effectively improved. The present application has been completed based on the above-described inventive concept.
The application provides a multi-stage air water taking system based on a thermal response polymer, which comprises a first thermal response polymer module, a second thermal response polymer module, a pre-cooling water collector, a first fan, a heater, a post-condensation water collector, a second fan, a water collecting unit, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a fourth electromagnetic valve, a fifth electromagnetic valve, a sixth electromagnetic valve, a seventh electromagnetic valve, an eighth electromagnetic valve, a first dew point temperature sensor and a second dew point temperature sensor.
The air inlet, the pre-cooling water collector, the first fan, the first thermal response polymer module and the dry air outlet are sequentially connected through an air pipeline; the air inlet, the pre-cooling water collector, the first fan, the second thermal response polymer module and the dry air outlet are sequentially connected through an air pipeline; the heater, the first thermal response polymer module, the rear condensation water collector and the second fan are sequentially connected through an air pipeline; the heater, the second thermally responsive polymer module, the post-condensation water collector and the second fan are connected in sequence through an air pipeline. The water collecting unit is respectively connected with the pre-cooling water collector, the rear condensation water collector, the first heat response polymer module and the second heat response polymer module through water pipes.
The first electromagnetic valve is positioned in the air pipeline between the first thermal response polymer module and the first fan and is close to the first thermal response polymer module; the second solenoid valve is positioned in the air pipeline between the first heat-responsive polymer module and the dry air outlet and is close to the dry air outlet, the third solenoid valve is positioned in the air pipeline between the heater and the second heat-responsive polymer module, the fourth solenoid valve is positioned in the air pipeline between the second heat-responsive polymer module and the rear condensation water collector and is close to the second heat-responsive polymer module, the fifth solenoid valve is positioned in the air pipeline between the first heat-responsive polymer module and the rear condensation water collector and is close to the first heat-responsive polymer module, the sixth solenoid valve is positioned in the air pipeline between the heater and the first heat-responsive polymer module, the seventh solenoid valve is positioned in the air pipeline between the second heat-responsive polymer module and the dry air outlet and is close to the dry air outlet, and the eighth solenoid valve is positioned in the air pipeline between the second heat-responsive polymer module and the first fan and is close to the second heat-responsive polymer module. The first dew point temperature sensor is located at the outlet of the first fan, and the second dew point temperature sensor is located at the air outlet of the drying air.
The design outlet air temperature of the pre-cooling water collector is 12-16 ℃, and the required cold source temperature of the post-condensing water collector is 4-6 ℃, including a low-cold-capacity gear and a high-cold-capacity gear; the air side refrigerating capacity of the low-cooling capacity gear and the high-cooling capacity gear is as follows:
Q l ＝0.000337×L×LCST
Q h ＝0.000337×L×(LCST+30)
wherein: q (Q) l The air side refrigerating capacity of the low-cold-capacity gear of the rear condensation water collector is kW; q (Q) h The air side refrigerating capacity of the high-cold-capacity gear of the rear condensation water collector is kW; l is air flow, m 3 /h; LCST is the bulk phase transition temperature, c, of a thermally responsive polymer.
The heater comprises a low-temperature gear and a high-temperature gear; the outlet air temperature is 10-15 ℃ higher than the volume phase transition temperature (LCST) of the thermally responsive polymer module when operating in low-temperature gear; the outlet air temperature is 38-43 ℃ higher than the volume phase transition temperature (LCST) of the thermally responsive polymer module during high temperature gear operation.
The application also provides a multi-stage air water taking system operation method based on the thermal response polymer, which comprises a first thermal response polymer module adsorption mode, a second thermal response polymer module adsorption mode, a low-temperature dehydration mode and a high-temperature degassing mode, wherein the condensation water collector operates in a low-cooling capacity gear after the low-temperature dehydration mode, and the heater operates in a low-temperature gear; the condensation water collector operates in a high-cooling capacity gear after the high-temperature degassing mode, and the heater operates in a high-temperature gear.
The first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve of the first thermal response polymer module adsorption mode are opened, and the fifth electromagnetic valve, the sixth electromagnetic valve, the seventh electromagnetic valve and the eighth electromagnetic valve are closed; the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve of the second thermal response polymer module adsorption mode are closed, and the fifth electromagnetic valve, the sixth electromagnetic valve, the seventh electromagnetic valve and the eighth electromagnetic valve are opened.
The system controls the system operation mode according to the first dew point temperature sensor and the second dew point temperature sensor, when the difference value between the measured value of the second dew point temperature sensor and the first dew point temperature sensor is less than or equal to 0.5 ℃, the system is switched from the first thermal response polymer adsorption mode (the second thermal response polymer module adsorption mode) to the second thermal response polymer module adsorption mode (the first thermal response polymer module adsorption mode), and is operated in the high temperature degassing mode after being operated in the low temperature dehydration mode for 40 minutes, and the system is operated in a reciprocating mode according to the cycle.
In a preferred embodiment of the present application, when the multi-stage air intake system based on the heat-responsive polymer is operated in the first heat-responsive polymer module adsorption mode, the adsorbed air is processed to 12 ℃ by the pre-cooling water collector 3 after entering the system from the air inlet, part of condensed water enters the water collecting unit 8 to be collected, passes through the first fan 4, enters the first heat-responsive polymer module 1-1 after collecting the dew point temperature of 12 ℃ by the first dew point temperature sensor 10-1, and the water vapor in the air is adsorbed by the heat-responsive polymer.
Subsequently, the opened second electromagnetic valve 9-2 is discharged from the dry air outlet to the system, and the dew point temperature is collected by the second dew point temperature sensor 10-2; meanwhile, the system operates in a low-temperature dehydration mode, the other air enters the system and is heated to 45 ℃ through the heater 5, then enters the second heat-responsive polymer module 1-2 through the opened third electromagnetic valve 9-3, the second heat-responsive polymer is heated and contracted, absorbed moisture is discharged in liquid water and flows to the water collecting unit 8 through the water pipeline to be collected, part of the moisture is taken away by the air in a gaseous water form and enters the post-condensation water collector 6 in a low-cold-capacity gear operation to be cooled, and condensed water flows to the water collecting unit 8 through the water pipeline to be collected.
After 40 minutes of operation in the low temperature dehydration mode, the system is switched to the high temperature degassing mode, namely, air is heated to 70 ℃ by the heater 5 and then enters the second thermally responsive polymer module 1-2 through the opened third electromagnetic valve 9-3, moisture is taken away by the air in a gaseous water form and enters the post-condensation water collector 6 in the high cold energy gear operation to be cooled, and condensed water flows to the water collecting unit 8 through a water pipeline to be collected.
When the system judges that the difference between the measured value of the second dew point temperature sensor 10-2 and the measured value of the first dew point temperature sensor 10-1 is less than or equal to 0.5 ℃, the system is switched from the first thermal response polymer module adsorption mode to the second thermal response polymer module adsorption mode, namely, the adsorbed air enters the system from an air inlet through a pipeline, then is treated to 12 ℃ through a pre-cooling water collector 3, part of condensed water enters a water collecting unit 8 to be collected, passes through a first fan 4, enters the second thermal response polymer module 1-2 after the dew point temperature (12 ℃) is collected through the first dew point temperature sensor 10-1, and water vapor in the air is adsorbed by the thermal response polymer.
Subsequently, the opened seventh solenoid valve 9-7 is discharged from the dry air outlet to the system, and the dew point temperature is collected by the second dew point temperature sensor 10-2. Meanwhile, the system is switched to a low-temperature dehydration mode to operate, the other air enters the system and is heated to 45 ℃ through the heater 5, then enters the first heat-response polymer module 1-1 through the opened sixth electromagnetic valve 9-6, the first heat-response polymer is heated and contracted, absorbed moisture is discharged in liquid water and flows to the water collecting unit 8 through the water pipeline to be collected, part of the moisture is taken away by the air in a gaseous water form and enters the post-condensation water collector 6 in a low-cold-capacity gear to be cooled, and condensed water flows to the water collecting unit 8 through the water pipeline to be collected.
After 40 minutes of operation in the low temperature dehydration mode, the system is switched to the high temperature degassing mode, namely, air is heated to 70 ℃ by the heater 5 and then enters the first thermally responsive polymer module 1-1 through the opened sixth electromagnetic valve 9-6, moisture is taken away by the air in a gaseous water form and enters the post-condensation water collector 6 in the high cold energy gear operation to be cooled, and condensed water flows to the water collecting unit 8 through a water pipeline to be collected.
When the system judges that the difference value between the measured value of the second dew point temperature sensor 10-2 and the measured value of the first dew point temperature sensor 10-1 is less than or equal to 0.5 ℃, the system is switched from the second thermal response polymer module adsorption mode to the first thermal response polymer module adsorption mode; the system thus far completes one cycle and is operated in a reciprocating cycle in this manner.
In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The application has the beneficial effects that: the system is matched with a corresponding operation method, so that moisture in air can be fully collected, and meanwhile, the system at each stage is ensured to operate in a mode of lowest energy consumption, and low-energy consumption air water taking is realized.
Drawings
In order to more clearly illustrate the technical solutions of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that, for some embodiments of the present application, each drawing in the following description can be further obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a multi-stage air intake system based on a thermally responsive polymer in accordance with an embodiment of the present application.
Reference numerals: the device comprises a first thermal response polymer module (1-1), a second thermal response polymer module (1-2), a pre-cooling water collector-3, a first fan-4, a heater-5, a post-condensation water collector-6, a second fan-7, a water collecting unit-8, a first electromagnetic valve (9-1), a second electromagnetic valve (9-2), a third electromagnetic valve (9-3), a fourth electromagnetic valve (9-4), a fifth electromagnetic valve (9-5), a sixth electromagnetic valve (9-6), a seventh electromagnetic valve (9-7), an eighth electromagnetic valve (9-8), a first dew point temperature sensor (10-1) and a second dew point temperature sensor (10-2).
Detailed Description
The application discloses a multi-stage air water taking system based on a thermal response polymer and an operation method thereof. The system operates through valve switching and double-gear operation of the post-condensation water collector and the heater, and matches the multi-stage desorption characteristics of the thermally-responsive polymer, so that multi-equipment and multi-stage atmospheric water collection is realized. The system is matched with a corresponding operation method, so that moisture in air can be fully collected, and meanwhile, the system at each stage is ensured to operate in a mode of lowest energy consumption, and low-energy consumption air water taking is realized.
The technical solutions will be clearly and completely described below by means of embodiments of the present application, it being apparent that the described embodiments are only some of the preferred embodiments of the present application, but not all embodiments. All other embodiments, which are obtained by persons skilled in the art without creative efforts, are included in the protection scope of the present application based on the embodiments of the present application.
Example 1
As shown in fig. 1, the multi-stage air intake system based on a thermally responsive polymer of the present embodiment includes a first thermally responsive polymer module 1-1, a second thermally responsive polymer module 1-2, a pre-cooling water collector 3, a first fan 4, a heater 5, a post-condensing water collector 6, a second fan 7, a water collecting unit 8, a first solenoid valve 9-1, a second solenoid valve 9-2, a third solenoid valve 9-3, a fourth solenoid valve 9-4, a fifth solenoid valve 9-5, a sixth solenoid valve 9-6, a seventh solenoid valve 9-7, an eighth solenoid valve 9-8, a first dew point temperature sensor 10-1, and a second dew point temperature sensor 10-2. Wherein, the pre-cooling water collector 3 and the post-condensing water collector 6 can be refrigerating equipment such as an evaporator of an air conditioning unit, a surface cooler, an indirect evaporative cooler, a semiconductor and the like; the heater 5 may be a heating device such as an electric heater, a heat pump condenser, a hot water coil, or the like.
The adsorbed air enters from the air inlet, and the pre-cooling water collector 3 and the first fan 4 are connected through an air pipe. The first fan 4 is divided into two branches, one air pipe is connected with the left end of the first thermal response polymer module 1-1, and the other air pipe is connected with the left end of the second thermal response polymer module 1-2. The air line passing through the right ends of the two thermally responsive polymer modules is connected to the heater 5 and the dry air outlet, respectively. The left end of the first thermal response polymer module 1-1 and the left end of the second thermal response polymer module 1-2 are respectively connected with an air pipe and are sequentially connected with the rear condensation water collector 6 and the second fan 7. The drain ports of the pre-cooling water collector 3, the post-condensing water collector 6, the first thermally-responsive polymer module 1-1 and the second thermally-responsive polymer module 1-2 are connected to the water collecting unit 8 through water pipes, respectively.
The first solenoid valve 9-1 is located in the air line between the first thermally responsive polymer block 1-1 and the first fan 4 and is adjacent to the first thermally responsive polymer block 1-1; the second electromagnetic valve 9-2 is positioned in the air pipeline between the first thermal response polymer module 1-1 and the dry air outlet and is close to the dry air outlet, the third electromagnetic valve 9-3 is positioned in the air pipeline between the heater 5 and the second thermal response polymer module 1-2, the fourth electromagnetic valve is positioned in the air pipeline between the second thermal response polymer module 1-2 and the rear condensation water collector 6 and is close to the dry air outlet, the fifth electromagnetic valve 9-5 is positioned in the air pipeline between the first thermal response polymer module 1-1 and the rear condensation water collector 6 and is close to the first thermal response polymer module 1-1, the sixth electromagnetic valve 9-6 is positioned in the air pipeline between the heater 5 and the first thermal response polymer module 1-1, the seventh electromagnetic valve 9-7 is positioned in the air pipeline between the second thermal response polymer module 1-2 and the dry air outlet and is close to the dry air outlet, and the eighth electromagnetic valve 9-8 is positioned in the air pipeline between the second thermal response polymer module 1-2 and the first thermal response polymer module 1-2 and is close to the second thermal response polymer module 1-2. The first dew point temperature sensor 10-1 is positioned at the outlet of the first fan 4, and the second dew point temperature sensor 10-2 is positioned at the air outlet of the drying air.
Example 2
The thermally responsive polymer used in this example was poly N-isopropyl acrylamide (PNIPAM) having a volume phase transition temperature of 32deg.C and a system air flow rate of 100m 3 And/h. The pre-cooling water collector 3 is designed to have an outlet air temperature of 12 ℃, the required cold source temperature of the post-condensation water collector 6 is 6 ℃, and the pre-cooling water collector comprises a low-cold-capacity gear and a high-cold-capacity gear. The air side refrigerating capacity of the low-cooling-capacity gear calculated according to the formula is 1.08kW, and the air side refrigerating capacity of the high-cooling-capacity gear is 2.09kW.
The heater 5 comprises a low-temperature gear and a high-temperature gear, and the temperature of the outlet air is 45 ℃ when the low-temperature gear operates; the outlet air temperature was 70 ℃ during high-temperature gear operation.
An interpenetrating network polymer is composed of poly-N-isopropyl acrylamide (PNIPAM) and polypyrrole (PPy). The interpenetrating network polymer volume phase transition temperature is 42 ℃, and the system air flow is 100m 3 And/h, designing the outlet air temperature of the pre-cooling water collector 3 to be 12 ℃, wherein the required cold source temperature of the post-condensation water collector 6 can be 4 ℃, and the pre-cooling water collector comprises a low-cooling-capacity gear and a high-cooling-capacity gear. The air side refrigerating capacity of the low-cooling-capacity gear calculated according to the formula is 1.42kW, and the air side refrigerating capacity of the high-cooling-capacity gear is 2.43kW. The heater 5 includes a low temperature gear and a high temperature gear, the low temperature gearThe outlet air temperature was 52 ℃ during the bit run; the outlet air temperature is 80 ℃ during the high-temperature gear operation.
Among the thermally responsive polymers, those comprising thermally responsive polymers grafted on cotton, fiber, conventional porous materials (mainly silica gel, etc.), or block copolymers of N-isopropylacrylamide and N, N' -methylenebisacrylamide, are not effective in desorbing liquid water (desorption amount of liquid water is less than 0.3 g/g) when heated to 20 ℃ above LCST, and are not applicable in the present application.
Example 3
The embodiment provides a multistage air water intake system operation method based on a thermal response polymer, which comprises a first thermal response polymer module adsorption mode, a second thermal response polymer module adsorption mode, a low-temperature dehydration mode and a high-temperature degassing mode, wherein a condensation water collector 6 operates in a low-cooling capacity gear after the low-temperature dehydration mode, and a heater 5 operates in the low-temperature gear; the condensation water collector 6 is operated in a high-cooling capacity gear after the high-temperature degassing mode, and the heater 5 is operated in a high-temperature gear.
The first thermal response polymer module adsorption mode is that the first electromagnetic valve 9-1, the second electromagnetic valve 9-2, the third electromagnetic valve 9-3 and the fourth electromagnetic valve 9-4 are opened, the fifth electromagnetic valve 9-5, the sixth electromagnetic valve 9-6, the seventh electromagnetic valve 9-7 and the eighth electromagnetic valve 9-8 are closed; the second thermal response polymer module adsorption mode is that the first electromagnetic valve 9-1, the second electromagnetic valve 9-2, the third electromagnetic valve 9-3 and the fourth electromagnetic valve 9-4 are closed, and the fifth electromagnetic valve 9-5, the sixth electromagnetic valve 9-6, the seventh electromagnetic valve 9-7 and the eighth electromagnetic valve 9-8 are opened.
When the system operates in the first thermal response polymer module adsorption mode, adsorbed air enters the system from an air inlet and is treated to 12 ℃ through the pre-cooling water collector 3, part of condensed water enters the water collecting unit 8 to be collected, the condensed water enters the first thermal response polymer module 1-1 after passing through the first fan 4 and the first dew point temperature sensor 10-1 to collect dew point temperature (12 ℃) and then enters the first thermal response polymer module 1-1, and water vapor in the air is adsorbed by the thermal response polymer. Subsequently, the opened second solenoid valve 9-2 is discharged from the dry air outlet to the system, and the dew point temperature is collected by the second dew point temperature sensor 10-2. Meanwhile, the system operates in a low-temperature dehydration mode, the other air enters the system and is heated to 45 ℃ through the heater 5, then enters the second heat-responsive polymer module 1-2 through the opened third electromagnetic valve 9-3, the second heat-responsive polymer is heated and contracted, absorbed moisture is discharged in liquid water and flows to the water collecting unit 8 through the water pipeline to be collected, part of the moisture is taken away by the air in a gaseous water form and enters the post-condensation water collector 6 in a low-cold-capacity gear operation to be cooled, and condensed water flows to the water collecting unit 8 through the water pipeline to be collected. After 40 minutes of operation in the low temperature dehydration mode, the system is switched to the high temperature degassing mode, namely, air is heated to 70 ℃ by the heater 5 and then enters the second thermally responsive polymer module 1-2 through the opened third electromagnetic valve 9-3, moisture is taken away by the air in a gaseous water form and enters the post-condensation water collector 6 in the high cold energy gear operation to be cooled, and condensed water flows to the water collecting unit 8 through a water pipeline to be collected. When the system judges that the difference between the measured value of the second dew point temperature sensor 10-2 and the measured value of the first dew point temperature sensor 10-1 is less than or equal to 0.5 ℃, the system is switched from the first thermal response polymer module adsorption mode to the second thermal response polymer module adsorption mode, namely, the adsorbed air enters the system from an air inlet through a pipeline, then is treated to 12 ℃ through a pre-cooling water collector 3, part of condensed water enters a water collecting unit 8 to be collected, passes through a first fan 4, enters the second thermal response polymer module 1-2 after the dew point temperature (12 ℃) is collected through the first dew point temperature sensor 10-1, and water vapor in the air is adsorbed by the thermal response polymer. Subsequently, the opened seventh solenoid valve 9-7 is discharged from the dry air outlet to the system, and the dew point temperature is collected by the second dew point temperature sensor 10-2. Meanwhile, the system is switched to a low-temperature dehydration mode to operate, the other air enters the system and is heated to 45 ℃ through the heater 5, then enters the first heat-response polymer module 1-1 through the opened sixth electromagnetic valve 9-6, the first heat-response polymer is heated and contracted, absorbed moisture is discharged in liquid water and flows to the water collecting unit 8 through the water pipeline to be collected, part of the moisture is taken away by the air in a gaseous water form and enters the post-condensation water collector 6 in a low-cold-capacity gear to be cooled, and condensed water flows to the water collecting unit 8 through the water pipeline to be collected. After 40 minutes of operation in the low temperature dehydration mode, the system is switched to the high temperature degassing mode, namely, air is heated to 70 ℃ by the heater 5 and then enters the first thermally responsive polymer module 1-1 through the opened sixth electromagnetic valve 9-6, moisture is taken away by the air in a gaseous water form and enters the post-condensation water collector 6 in the high cold energy gear operation to be cooled, and condensed water flows to the water collecting unit 8 through a water pipeline to be collected. When the system judges that the difference value between the measured value of the second dew point temperature sensor 10-2 and the measured value of the first dew point temperature sensor 10-1 is less than or equal to 0.5 ℃, the system is switched from the second thermal response polymer module adsorption mode to the first thermal response polymer module adsorption mode. The system thus completes one cycle and cycles back and forth in this manner.
The system is operated in a reciprocating manner as described above, and the adsorption efficiency of the thermally responsive polymer is improved by utilizing and cooling the evaporator to collect a portion of the moisture in the air and cool the air. And meanwhile, the water in the air is further collected through two thermal response polymer module adsorption-desorption cycles and then is collected. According to the multi-stage desorption characteristics of the thermal response polymer, the system is matched with the multi-stage desorption characteristics of the thermal response polymer through the double-gear operation of the heater and the post-condensation water collector, so that each stage of the system is ensured to operate with the lowest energy consumption and necessary water collecting capacity is provided.
The interpenetrating network polymer of poly-N-isopropyl acrylamide (PNIPAM) and polypyrrole (PPy) has an equilibrium adsorption of about 1.9g/g at a relative humidity of 90% and a desorption of liquid water heated at 52 ℃ of about 0.8g/g. By theoretical calculation and analysis, 100g of interpenetrating network polymer of poly-N-isopropyl acrylamide (PNIPAM) and polypyrrole (PPy) were used at room temperature of 25 ℃ and relative humidity of 50% (air flow rate 100 m) 3 And/h), refrigerating by using an air conditioner with COP of 2, and heating by using an electric heater. The water collection amount of the system in the first stage (low-temperature dehydration mode) per unit time is about 0.1g/s (the water collection amount of the pre-cooling water collector is 0.03g/s, the dehydration of the heat-responsive polymer is 0.07 g/s), and the energy consumption is 1.81kW (without considering the energy consumption of a fan); the water collection amount in the unit time of the second stage (high temperature degassing mode) is about 0.14g/s (the water collection amount of the pre-cooling water collector is 0.03g/s, the water collection amount of the post-condensation water collector is about 0.11 g/s), and the energy consumption is 3.78kW. The traditional adsorption dehumidification water taking device adopting silica gel and the like needs full-load operation in the whole process, and the regeneration temperature is required to be 100 ℃ generally. In the same wayThe energy consumption of the wet air with the same water intake (0.1 g/s) is 4.46kW, which is far higher than the energy consumption of the first stage 1.81kW and the second stage 3.78kW.
The above-described embodiments are merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be suggested to one skilled in the art without inventive effort are intended to be included in the scope of the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims in the present application.
Claims (10)
1. A multi-stage air water taking system based on a thermal response polymer comprises a first thermal response polymer module, a second thermal response polymer module, a pre-cooling water collector, a first fan, a heater, a post-condensation water collector, a second fan, a water collecting unit, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a fourth electromagnetic valve, a fifth electromagnetic valve, a sixth electromagnetic valve, a seventh electromagnetic valve, an eighth electromagnetic valve, a first dew point temperature sensor and a second dew point temperature sensor;
the air inlet, the pre-cooling water collector, the first fan, the first heat response polymer module and the dry air outlet are sequentially connected through an air pipeline; the air inlet, the pre-cooling water collector, the first fan, the second heat response polymer module and the dry air outlet are sequentially connected through an air pipeline; the heater, the first thermal response polymer module, the rear condensation water collector and the second fan are sequentially connected through an air pipeline; the heater, the second heat-responsive polymer module, the rear condensation water collector and the second fan are sequentially connected through an air pipeline;
the water collecting unit is respectively connected with the pre-cooling water collector, the rear condensation water collector, the first thermal response polymer module and the second thermal response polymer module through water pipes;
the first electromagnetic valve is positioned in an air pipeline between the first thermal response polymer module and the first fan and is close to the first thermal response polymer module; the second electromagnetic valve is positioned in the air pipeline between the first thermal response polymer module and the dry air outlet and is close to the dry air outlet, the third electromagnetic valve is positioned in the air pipeline between the heater and the second thermal response polymer module, the fourth electromagnetic valve is positioned in the air pipeline between the second thermal response polymer module and the rear condensation water collector and is close to the second thermal response polymer module, the fifth electromagnetic valve is positioned in the air pipeline between the first thermal response polymer module and the rear condensation water collector and is close to the first thermal response polymer module, the sixth electromagnetic valve is positioned in the air pipeline between the heater and the first thermal response polymer module, the seventh electromagnetic valve is positioned in the air pipeline between the second thermal response polymer module and the dry air outlet and is close to the dry air outlet, and the eighth electromagnetic valve is positioned in the air pipeline between the second thermal response polymer module and the first fan and is close to the second thermal response polymer module;
the first dew point temperature sensor is located at the outlet of the first fan, and the second dew point temperature sensor is located at the air outlet of the drying air.
2. A multi-stage water intake air system according to claim 1, wherein: the outlet air temperature of the pre-cooling water collector is 12-16 ℃.
3. A multi-stage water intake air system according to claim 1, wherein: in the post-condensation water collector, the temperature of a required cold source is 4-6 ℃, and the required cold source comprises a low-cold-capacity gear and a high-cold-capacity gear;
the air side refrigerating capacity of the low-cooling capacity gear and the high-cooling capacity gear is as follows:
Q l ＝0.000337×L×LCST
Q h ＝0.000337×L×(LCST+30)
wherein: q (Q) l The air side refrigerating capacity of the low-cold-capacity gear of the rear condensation water collector is kW;
Q h the air side refrigerating capacity of the high-cold-capacity gear of the rear condensation water collector is kW;
l is air flow, m 3 /h；
LCST is the bulk phase transition temperature, c, of a thermally responsive polymer.
4. A multi-stage water intake air system according to claim 1, wherein: the heater comprises a low-temperature gear and a high-temperature gear; the temperature of the outlet air is 10-15 ℃ higher than the volume phase transition temperature of the thermally responsive polymer module when the low-temperature gear is operated; the outlet air temperature is 38-43 ℃ higher than the volume phase transition temperature of the thermally responsive polymer module during high temperature gear operation.
5. Use of a multi-stage water intake air system according to any one of claims 1-4, wherein the multi-stage water intake air system is used for taking water from the air.
6. A method of operating a multi-stage water-in-air system based on a thermally responsive polymer, comprising: air intake using the multi-stage air intake system of any one of claims 1-4, the thermally responsive polymer-based multi-stage air intake system operating method comprising a first thermally responsive polymer module adsorption mode, a second thermally responsive polymer module adsorption mode, a low temperature dehydration mode, and/or a high temperature degassing mode.
7. A multi-stage air water intake system operating method of claim 6, wherein: the condensing water collector operates in a low-cooling-capacity gear after the low-temperature dehydration mode, and the heater operates in a low-temperature gear;
the condensation water collector operates in a high-cooling capacity gear after the high-temperature degassing mode, and the heater operates in a high-temperature gear.
8. A multi-stage air water intake system operating method of claim 6, wherein: the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve of the first thermal response polymer module adsorption mode are opened, and the fifth electromagnetic valve, the sixth electromagnetic valve, the seventh electromagnetic valve and the eighth electromagnetic valve are closed;
the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve of the second thermal response polymer module adsorption mode are closed, and the fifth electromagnetic valve, the sixth electromagnetic valve, the seventh electromagnetic valve and the eighth electromagnetic valve are opened.
9. A multi-stage air water intake system operating method of claim 6, wherein: and according to the operation modes of the first dew point temperature sensor and the second dew point temperature sensor, when the difference value between the measured value of the second dew point temperature sensor and the first dew point temperature sensor is less than or equal to 0.5 ℃, the system is switched from the first thermal response polymer adsorption mode to the second thermal response polymer module adsorption mode or from the second thermal response polymer module adsorption mode to the first thermal response polymer module adsorption mode, and is operated in a low-temperature dehydration mode for 40 minutes and then is operated in a high-temperature degassing mode, and the system is operated repeatedly.
10. The method for operating a multi-stage air intake system based on a thermally responsive polymer as claimed in claim 6, wherein when the multi-stage air intake system based on a thermally responsive polymer is operated in a first thermally responsive polymer module adsorption mode, the adsorbed air is processed to 12 ℃ by the pre-cooling water collector 3 after entering the system from the air inlet, part of condensed water enters the water collecting unit 8 to be collected, passes through the first fan 4, enters the first thermally responsive polymer module 1-1 after collecting the dew point temperature of 12 ℃ by the first dew point temperature sensor 10-1, and the water vapor in the air is adsorbed by the thermally responsive polymer;
subsequently, the opened second electromagnetic valve 9-2 is discharged from the dry air outlet to the system, and the dew point temperature is collected by the second dew point temperature sensor 10-2; meanwhile, the system operates in a low-temperature dehydration mode, the other air enters the system and is heated to 45 ℃ through the heater 5, then enters the second heat-responsive polymer module 1-2 through the opened third electromagnetic valve 9-3, the second heat-responsive polymer is heated and contracted, absorbed water is discharged in liquid water and flows to the water collecting unit 8 through the water pipeline to be collected, part of the water is taken away by the air in a gaseous water form and enters the post-condensation water collector 6 in a low-cold-capacity gear operation to be cooled, and condensed water flows to the water collecting unit 8 through the water pipeline to be collected;
after the system is operated in the low-temperature dehydration mode for 40 minutes, the system is switched to the high-temperature degassing mode to operate, namely, air is heated to 70 ℃ by a heater 5 and then enters a second thermally-responsive polymer module 1-2 through a third electromagnetic valve 9-3 which is opened, moisture is taken away by the air in a gaseous water form and enters a post-condensation water collector 6 which is operated in a high-cold-capacity gear to be cooled, and condensed water flows to a water collecting unit 8 through a water pipeline to be collected;
when the system judges that the difference value between the measured value of the second dew point temperature sensor 10-2 and the measured value of the first dew point temperature sensor 10-1 is less than or equal to 0.5 ℃, the system is switched from the first thermal response polymer module adsorption mode to the second thermal response polymer module adsorption mode, namely, the adsorbed air enters the system from an air inlet through a pipeline, then is treated to 12 ℃ through a pre-cooling water collector 3, part of condensed water enters a water collecting unit 8 to be collected, passes through a first fan 4, enters the second thermal response polymer module 1-2 after the dew point temperature is collected to 12 ℃ through the first dew point temperature sensor 10-1, and water vapor in the air is adsorbed by the thermal response polymer;
subsequently, the opened seventh solenoid valve 9-7 is discharged from the dry air outlet to the system, and the dew point temperature is collected by the second dew point temperature sensor 10-2. Meanwhile, the system is switched to a low-temperature dehydration mode to operate, the other path of air enters the system and is heated to 45 ℃ through a heater 5, then enters a first heat-responsive polymer module 1-1 through an opened sixth electromagnetic valve 9-6, the first heat-responsive polymer is heated and contracted, absorbed moisture is discharged in liquid water and flows to a water collecting unit 8 through a water pipeline to be collected, part of the moisture is taken away by the air in a gaseous water form and enters a post-condensation water collector 6 in a low-cold-capacity gear to be cooled, and condensed water flows to the water collecting unit 8 through the water pipeline to be collected;
after the system is operated in the low-temperature dehydration mode for 40 minutes, the system is switched to the high-temperature degassing mode operation, namely, air is heated to 70 ℃ by a heater 5 and then enters a first thermally-responsive polymer module 1-1 through a sixth electromagnetic valve 9-6 which is opened, moisture is taken away by the air in a gaseous water form and enters a post-condensation water collector 6 which is operated in a high-cold-capacity gear position to be cooled, and condensed water flows to a water collecting unit 8 through a water pipeline to be collected;
when the system judges that the difference value between the measured value of the second dew point temperature sensor 10-2 and the measured value of the first dew point temperature sensor 10-1 is less than or equal to 0.5 ℃, the system is switched from the second thermal response polymer module adsorption mode to the first thermal response polymer module adsorption mode; the system thus far completes one cycle and is operated in a reciprocating cycle in this manner.
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