CN108187459B - Air spiral type membrane dehumidifier, electrodialysis regeneration device and dehumidification heating system thereof - Google Patents
Air spiral type membrane dehumidifier, electrodialysis regeneration device and dehumidification heating system thereof Download PDFInfo
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- CN108187459B CN108187459B CN201810054124.6A CN201810054124A CN108187459B CN 108187459 B CN108187459 B CN 108187459B CN 201810054124 A CN201810054124 A CN 201810054124A CN 108187459 B CN108187459 B CN 108187459B
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- 239000012528 membrane Substances 0.000 title claims abstract description 137
- 238000007791 dehumidification Methods 0.000 title claims abstract description 40
- 230000008929 regeneration Effects 0.000 title claims abstract description 34
- 238000011069 regeneration method Methods 0.000 title claims abstract description 34
- 238000000909 electrodialysis Methods 0.000 title claims abstract description 31
- 238000010438 heat treatment Methods 0.000 title claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 112
- 238000003860 storage Methods 0.000 claims abstract description 102
- 238000010521 absorption reaction Methods 0.000 claims abstract description 16
- 239000012510 hollow fiber Substances 0.000 claims description 70
- 239000003011 anion exchange membrane Substances 0.000 claims description 26
- 238000005341 cation exchange Methods 0.000 claims description 26
- 238000006243 chemical reaction Methods 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 239000006096 absorbing agent Substances 0.000 claims description 15
- 239000003014 ion exchange membrane Substances 0.000 claims description 9
- 230000014759 maintenance of location Effects 0.000 claims description 7
- 238000003491 array Methods 0.000 claims description 5
- 238000007664 blowing Methods 0.000 claims description 3
- 239000003570 air Substances 0.000 description 106
- 239000002274 desiccant Substances 0.000 description 8
- 238000001816 cooling Methods 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 6
- 239000003463 adsorbent Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 150000001450 anions Chemical class 0.000 description 4
- 150000001768 cations Chemical class 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000002250 absorbent Substances 0.000 description 3
- 230000002745 absorbent Effects 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/268—Drying gases or vapours by diffusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1425—Regeneration of liquid absorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
- B01D53/228—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion characterised by specific membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/263—Drying gases or vapours by absorption
-
- 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
- F24F3/1417—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 with liquid hygroscopic desiccants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/04—Heat pumps of the sorption type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
-
- 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
- F24F2003/144—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 dehumidification only
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Combustion & Propulsion (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides an air spiral type membrane dehumidifier, an electrodialysis regeneration device and a dehumidification and heating system thereof, wherein the dehumidification and heating system comprises the air spiral type membrane dehumidifier and the electrodialysis regeneration device; the system also comprises a first liquid storage tank, a second liquid storage tank and an absorption heat pump; the first liquid storage tank and the second liquid storage tank are respectively provided with a dehumidifying solution; the solution inlet of the air spiral type membrane dehumidifier is communicated with the first liquid storage tank, the solution outlet of the air spiral type membrane dehumidifier is communicated with the second liquid storage tank, and the first liquid storage tank and the second liquid storage tank are respectively communicated with the electrodialysis regeneration device; the absorption heat pump is connected between the first liquid storage tank and the second liquid storage tank; the dehumidification solution in the first liquid storage tank flows into the second liquid storage tank after passing through the air spiral type membrane dehumidifier and the absorption heat pump respectively; the dehumidified solution in the second liquid storage tank flows into the first liquid storage tank after passing through the electrodialysis regeneration device. The invention uses the same set of equipment to simultaneously meet the heating and dehumidifying requirements of people, and has wide market prospect.
Description
Technical Field
The invention relates to the field of dehumidification devices, in particular to an air spiral type membrane dehumidifier, an electrodialysis regeneration device and a dehumidification heating system thereof.
Background
The temperature and humidity of the air are two key factors affecting the comfort level of the environment. In hot climates, cooling the ambient air temperature may improve comfort; however, in hot humid climates, particularly in the gulf city, dehumidification is almost as important as cooling. Studies have shown that a suitable relative humidity for the human body is 40-60%, and that too high a humidity may cause discomfort to the human body.
Along with the development of national economy, the living standard of people is continuously improved, the requirements on the damp and hot environment of the building are also continuously improved, the application of the air conditioner is wider and wider, and the requirements on an air conditioning system are also higher and higher. The air conditioning system is used as a large household with energy consumption in China, which occupies about 15% of national energy consumption, and most areas in China are high-temperature and high-humidity in summer, especially in south China, and the dehumidification energy consumption occupies 20% -40% of the total energy consumption of the air conditioner, so that the humidity control has great significance for realizing the energy conservation of the air conditioning system.
Common methods of air dehumidification include cooling dehumidification, solid adsorbent dehumidification and liquid adsorbent dehumidification. The cooling method is to cool the wet air below the dew point temperature to condense the water vapor in the air and remove the condensed water vapor from the air. The method needs to reduce the air to below the dew point temperature, remove the water and then raise the temperature to the air supply state, and has high energy consumption. Solid adsorbent dehumidification is a process that utilizes some solid adsorbents to absorb moisture. The method has the greatest defects that the solid adsorbents are difficult to regenerate, the device is complex, the equipment is large in size and high in cost. The liquid moisture absorbent is used for dehumidifying by absorbing moisture in air by using certain hygroscopic solution. The liquid dehumidifying regeneration is easy, and the disadvantage is that the treated air is in direct contact with the liquid absorbent, which is easy to cause the air to entrain the absorbent, and further causes corrosion of pipelines and equipment.
To thoroughly solve this problem, membrane liquid dehumidification techniques have been developed. The key to membrane liquid dehumidification is a semipermeable membrane with selective permeability. In a membrane module dehumidifier, air and a desiccant solution are separated by a semipermeable membrane. The membrane is selectively permeable to permit only water vapor permeation, while preventing permeation of other gases and liquids. The air and solution streams may exchange heat and water vapor through the membrane to effect dehumidification. The membrane contactor has the advantages of high efficiency, no liquid water condensation, low energy consumption and energy storage through solution, has been widely used for liquid desiccant air dehumidification, and has achieved great progress and wide engineering application.
The desiccant has a high affinity for water and is capable of absorbing water vapor from the vicinity thereof. In a desiccant cooling cycle, the desiccant reduces the humidity of the air by absorbing moisture from the air, which is then cooled by conventional cooling coils or other components such as an evaporative cooler. However, reduced concentrations of desiccant solution that absorbs moisture require concentration in the regenerator, and the heat used for desiccant regeneration represents the maximum capacity requirements associated with liquid desiccant systems.
In daily life and industrial processes, there are a large number of sites where hot fluid is taken or the ambient temperature is raised, and there are a large number of sites where dry air is taken or the humidity of the gas is controlled within a certain range. People often need to use heat pump and dehumidifier with single function in order to satisfy the demand of heating and dehumidification, purchase two sets of equipment just can satisfy different demands, have with high costs, the big problem of area, bring inconvenience and cause waste in material and the energy easily for people like this.
Disclosure of Invention
The invention aims to provide an air spiral type membrane dehumidifier, an electrodialysis regeneration device and a dehumidification heating system thereof, aiming at the defects in the prior art, and simultaneously meeting the heating and dehumidification requirements of people by using the same set of equipment.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
an air spiral type membrane dehumidifier comprises an air dehumidifying cavity, a first solution cavity and a second solution cavity; the air dehumidifying cavity is hollow and cylindrical, and the first solution cavity and the second solution cavity are respectively connected to the outer parts of two end surfaces of the air dehumidifying cavity; the inside of the air dehumidifying cavity is provided with a plurality of hollow fiber membrane bundles arranged along the axial direction, and the hollow fiber membrane bundles are connected between two end surfaces of the air dehumidifying cavity to communicate the first solution cavity with the second solution cavity;
the first solution cavity is provided with a solution inlet, and the second solution cavity is provided with a solution outlet; the dehumidifying solution flows in from the solution inlet of the first solution cavity, flows into the second solution cavity through the hollow fiber membrane tube bundles and flows out from the solution outlet of the second solution cavity;
the side surface of the air dehumidifying cavity near one end of the second solution cavity is provided with an air inlet, and the middle part of the end surface of the air dehumidifying cavity near one end of the first solution cavity is provided with an air outlet communicated with the outside; moist air is blown in from the air inlet, dehumidified by the hollow fiber membrane bundles in the air dehumidifying chamber, and then blown out of the air outlet as dry air.
Further, the air inlet direction of the air inlet is tangential to the side surface of the air dehumidifying chamber.
Further, the hollow fiber membrane tube bundles are sequentially arranged into N regular hexagons from inside to outside by taking the axis of the air dehumidifying cavity as the center; the distances between any two adjacent hollow fiber membrane tube bundles are equal, so that any three adjacent hollow fiber membrane tube bundles form an equilateral triangle.
Further, the plurality of hollow fiber membrane bundles in the air dehumidifying cavity are divided into N groups, and the hollow fiber membrane bundles of each group sequentially enclose M circles of concentric circle arrays from inside to outside by taking the axle center of the air dehumidifying cavity as the center; the N groups of hollow fiber membrane bundles are also sequentially distributed from inside to outside to form concentric circles;
in M circles of concentric circular arrays formed by arranging the hollow fiber membrane bundles in the same group, the number of the hollow fiber membrane bundles arranged in each circular array is equal, and the hollow fiber membrane bundles in each circular array are uniformly distributed; wherein, a certain rotation angle is staggered between two adjacent circles of hollow fiber membrane tube bundles, so that any hollow fiber membrane tube bundle on the outer ring and two hollow fiber membrane tube bundles closest to the hollow fiber membrane tube bundles on the inner ring form an isosceles triangle;
in the adjacent two groups of hollow fiber membrane bundles, the number of hollow fiber membrane bundles located at the outer ring is twice the number of hollow fiber membrane bundles located at the inner ring.
Further, 3.ltoreq.N.ltoreq.8, M=4.
The electrodialysis regeneration device for the dehumidification solution is connected with a first liquid storage tank and a second liquid storage tank through pipelines respectively, the dehumidification solution is respectively filled in the first liquid storage tank and the second liquid storage tank, the electrodialysis regeneration device comprises a power supply, a positive plate and a negative plate, the positive plate is electrically connected with the positive electrode of the power supply, and the negative plate is electrically connected with the negative electrode of the power supply; a reaction tank is arranged between the positive plate and the negative plate, and the reaction tank is divided into a plurality of reaction chambers by a plurality of ion exchange membranes arranged parallel to the positive plate and the negative plate;
the ion exchange membranes comprise cation exchange membranes and anion exchange membranes, the cation exchange membranes and the anion exchange membranes are alternately arranged at intervals, the anion exchange membrane closest to the anode plate is the anion exchange membrane, and the cation exchange membrane closest to the cathode plate is the cation exchange membrane; a cation exchange membrane is arranged between every two adjacent anion exchange membranes, and an anion exchange membrane is arranged between every two adjacent cation exchange membranes;
in the reaction chambers, if the side wall close to the anode plate is a cation exchange membrane and the side wall close to the cathode plate is an anion exchange membrane, the reaction chamber is a concentrated solution retention chamber; if the side wall close to the anode plate is an anion exchange membrane and the side wall close to the cathode plate is a cation exchange membrane, the reaction bin is a dilute solution retention bin;
each concentrated solution retaining bin is communicated with the first liquid storage tank through a pipeline to form a closed circulation loop, and each dilute solution retaining bin is communicated with the second liquid storage tank through a pipeline to form a closed circulation loop.
Further, the power source is a solar photovoltaic cell.
A dehumidifying and heating system comprises the air spiral type membrane dehumidifier and an electrodialysis regeneration device;
the system also comprises a first liquid storage tank, a second liquid storage tank and an absorption heat pump; the first liquid storage tank and the second liquid storage tank are respectively provided with a dehumidifying solution;
the solution inlet of the air spiral type membrane dehumidifier is communicated with the first liquid storage tank, the solution outlet of the air spiral type membrane dehumidifier is communicated with the second liquid storage tank, and the first liquid storage tank and the second liquid storage tank are respectively communicated with the electrodialysis regeneration device; the absorption heat pump is connected between the first liquid storage tank and the second liquid storage tank;
the dehumidification solution in the first liquid storage tank flows into the second liquid storage tank after passing through the air spiral type membrane dehumidifier and the absorption heat pump respectively; the dehumidified solution in the second liquid storage tank flows into the first liquid storage tank after passing through the electrodialysis regeneration device.
Further, the absorption heat pump comprises a heat pump absorber, a third liquid storage tank and a heat exchanger; the heat pump absorber and the heat exchanger are sequentially connected between the first liquid storage tank and the second liquid storage tank, and the heat pump absorber is also communicated with the third liquid storage tank to form a closed circulation pipeline; the third liquid storage tank is filled with water.
Further, the air blower is arranged at the air inlet of the air disc type membrane dehumidifier and used for blowing air to be dehumidified into the air inlet along the tangential direction of the air dehumidifying cavity.
The air spiral type membrane dehumidifier provided by the invention realizes the dehumidification function of air by adopting simple and effective spatial structure distribution, and the electrodialysis regeneration device provided by the invention can perform concentration regeneration on the used dehumidification solution under the condition of not consuming heat. The dehumidifying and heating system provided by the invention is characterized in that the air spiral membrane dehumidifier and the electrodialysis regeneration device are connected into the same system, and the dehumidifying solution used by the air spiral membrane dehumidifier is circularly regenerated under the condition of not consuming heat; in addition, the dehumidification solution can be used for generating additional heat, and the same set of equipment is used for simultaneously meeting the heating and dehumidification requirements of people, so that the dehumidification device has wide market prospect.
Drawings
Fig. 1 is a schematic structural diagram of an air spiral type membrane dehumidifier according to an embodiment of the present invention.
Fig. 2 is a schematic view showing a first arrangement of hollow fiber membrane bundles according to the first embodiment of the present invention.
Fig. 3 is a schematic view showing a second arrangement of hollow fiber membrane bundles according to the first embodiment of the invention.
Fig. 4 is a schematic diagram of an electrodialysis regeneration device for removing a wet solution according to a second embodiment of the invention.
Fig. 5 is a schematic structural diagram of a dehumidifying and heating system according to a third embodiment of the present invention.
Reference numerals:
air inlet 1 air dehumidifying chamber 2 air outlet 3
First solution chamber 41 second solution chamber 42 solution inlet 5
Solution outlet 6 negative plate 7 first liquid storage tank 8
Cation exchange membrane 9 Power supply 10 anion exchange Membrane 11
Positive plate 14 of second liquid storage tank 13 of dehumidifying solution cation 12
Dehumidification solution anion 15 concentrated solution retention bin 16 air spiral type membrane dehumidifier 17
Electrodialysis regeneration device 20 with blower 18 and heat exchanger 19
Hollow fiber membrane tube bundle 23 of heat pump absorber 22 of third liquid storage tank 21
Detailed Description
The technical scheme of the invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Example 1
As shown in fig. 1 to 3, an embodiment of the present invention provides an air-spiral type membrane dehumidifier including an air dehumidifying chamber 2, a first solution chamber 41 and a second solution chamber 42; the air dehumidifying chamber 2 is hollow and cylindrical, and the first solution chamber 41 and the second solution chamber 42 are respectively connected to the outer parts of two end surfaces of the air dehumidifying chamber 2; inside the air dehumidifying chamber 2, there are a plurality of hollow fiber membrane bundles 23 disposed in the axial direction, and the plurality of hollow fiber membrane bundles 23 are connected between both end surfaces of the air dehumidifying chamber 2, communicating the first solution chamber 41 with the second solution chamber 42.
Specifically, the first solution chamber 41 is provided with a solution inlet 5, and the second solution chamber 42 is provided with a solution outlet 6; the dehumidifying solution flows in from the solution inlet 5 of the first solution chamber 41, passes through the plurality of hollow fiber membrane bundles 23, flows into the second solution chamber 42, and flows out from the solution outlet 6 of the second solution chamber 42.
An air inlet 1 is formed in the side face, close to one end, of the air dehumidifying cavity 2, close to the second solution cavity 42, and an air outlet 3 communicated with the outside is formed in the middle of the end face, close to one end, of the air dehumidifying cavity 2, close to the first solution cavity 41; moist air is blown in from the air inlet 1, dehumidified by the hollow fiber bundles 23 in the air dehumidifying chamber 2, and then blown out of the air outlet 3 as dry air.
As a modification, the air inlet 1 is tangential to the side of the air dehumidifying chamber 2.
Further, this embodiment provides two possible arrangements of hollow fiber membrane bundles, as shown in fig. 2 and 3. It should be noted that, in order to clearly show the arrangement rule of the hollow fiber membrane bundles 23, all bundles are not shown in fig. 2 and 3, so that the information in the drawings is prevented from being too dense; meanwhile, in order to make the arrangement rules clearer, auxiliary lines are added in the figure, and the related auxiliary lines are used for explaining the arrangement rules of the hollow fiber membrane bundles 23, and are not specific structures which exist objectively, and do not limit the protection scope of the invention.
Specifically, as shown in fig. 2, the first arrangement mode is that a plurality of hollow fiber membrane bundles 23 in the air dehumidifying chamber 2 are divided into N groups, and each group of hollow fiber membrane bundles 23 sequentially surrounds the axis of the air dehumidifying chamber 2 from inside to outside to form an M-circle concentric circle array; the N groups of hollow fiber membrane bundles 23 are also sequentially arranged from inside to outside to form concentric circles;
in M circles of concentric circular arrays formed by arranging the same group of hollow fiber membrane bundles 23, the number of the hollow fiber membrane bundles 23 arranged in each circular array is equal, and the hollow fiber membrane bundles 23 in each circular array are uniformly distributed; wherein, a certain rotation angle is staggered between two adjacent circles of hollow fiber membrane tube bundles 23, so that any hollow fiber membrane tube bundle 23 on the outer ring and two hollow fiber membrane tube bundles 23 closest to the hollow fiber membrane tube bundles on the inner ring form an isosceles triangle;
further, in the adjacent two sets of hollow fiber membrane bundles 23, the number of hollow fiber membrane bundles 23 located at the outer ring is twice the number of hollow fiber membrane bundles 23 located at the inner ring.
In the embodiment of the present invention, the number N of groups of the hollow fiber membrane bundles 23 and the number M of turns contained in each group of the hollow fiber membrane bundles 23 satisfy the following conditions: n is 3-8 and m=4.
The second arrangement is shown in fig. 3, in which the hollow fiber membrane tube bundles 23 are sequentially arranged into N regular hexagons from inside to outside with the axis of the air dehumidifying chamber 2 as the center; wherein the distances between any two adjacent hollow fiber membrane bundles 23 are equal, so that any three adjacent hollow fiber membrane bundles 23 form an equilateral triangle.
It should be noted that, in the two arrangements, an arrangement having an isosceles triangle structure is adopted, and this arrangement has the advantage of guiding the flow direction of air in the air dehumidifying chamber 2, and by combining the mode of blowing air in the tangential direction, the air can spiral and sweep the hollow fiber membrane tube 23 in the air dehumidifying chamber 2, so as to dehumidify more effectively.
When the air disc type membrane dehumidifier provided by the embodiment works, a dehumidifying solution flows into the first solution cavity 4 from the solution inlet 5, then flows into the hollow fiber membrane tube bundle 23, absorbs water vapor outside the tube wall through the selective permeability of the hollow fiber membrane tube bundle 23, then flows into the second solution cavity 42 at the lower part, and finally flows out from the solution outlet 6; at the same time, air to be subjected to drying treatment is blown in from the air inlet 1, swirls across each hollow fiber membrane tube bundle 23 in the air dehumidifying chamber 2, and the dehumidified air is finally blown out from the air outlet 3 at the upper center.
In this embodiment, the dehumidifying solution is LiCl solution, which is a water absorbing solution, and the equilibrium water vapor partial pressure of the solution with a certain concentration is smaller than that of the pure water fluid surface at a certain temperature, and these solutions have strong water absorption as water absorbing agents. Can quickly absorb moisture in the air and dehumidify the air.
Example two
As shown in fig. 4, an embodiment of the present invention provides an electrodialysis regeneration device for a dehumidifying solution. The electrodialysis regenerating unit is connected with the first liquid storage tank 8 and the second liquid storage tank 13 through pipelines respectively, dehumidification solutions are respectively arranged in the first liquid storage tank 8 and the second liquid storage tank 13, and in general, the dehumidification solution in the first liquid storage tank 8 is a solution with higher concentration, and the second liquid storage tank 13 is a solution with lower concentration after use.
Specifically, the electrodialysis regeneration device comprises a power supply 10, a positive plate 14 and a negative plate 7, wherein the positive plate 14 is electrically connected to the positive electrode of the power supply 10, and the negative plate 7 is electrically connected to the negative electrode of the power supply 10; a reaction tank is arranged between the positive plate 14 and the negative plate 7, and the reaction tank is divided into a plurality of reaction chambers by a plurality of ion exchange membranes arranged parallel to the positive plate 14 and the negative plate 7.
Wherein the ion exchange membrane comprises a cation exchange membrane 9 and an anion exchange membrane 11, the cation exchange membrane 9 allows cations to permeate and prevents anions from permeating, and the anion exchange membrane 11 allows anions to permeate and prevents cations from permeating.
In the reaction tank, the cation exchange membranes 9 and the anion exchange membranes 11 are alternately arranged at intervals, wherein the ion exchange membrane closest to the anode plate 14 is the anion exchange membrane 11, and the ion exchange membrane closest to the cathode plate 7 is the cation exchange membrane 9; a cation exchange membrane 9 is arranged between every two adjacent anion exchange membranes 11, and an anion exchange membrane 11 is arranged between every two adjacent cation exchange membranes 9.
In the reaction chambers, if the side wall close to the anode plate 14 is a cation exchange membrane 9 and the side wall close to the cathode plate 7 is an anion exchange membrane 11, the reaction chamber is a concentrated solution retention chamber 16; if the side wall close to the anode plate 14 is an anion exchange membrane 11 and the side wall close to the cathode plate 7 is a cation exchange membrane 9, the reaction bin is a dilute solution retention bin. Each concentrated solution retaining bin 16 is respectively communicated with the first liquid storage tank 8 through a pipeline to form a closed circulation loop, and each dilute solution retaining bin is respectively communicated with the second liquid storage tank 13 through a pipeline to form a closed circulation loop.
As an improvement, in this embodiment, the power supply 10 is a solar photovoltaic cell, so that the electrodialysis regeneration device has a more environment-friendly energy source, and no additional intranet resources are required to be consumed.
In this embodiment, electrodialysis is performed by using a solar photovoltaic cell as a drive, and under the action of a direct current electric field, an electrolyte is separated from a solution by using the selective permeability of an ion exchange membrane by using a potential difference as power. Specifically, when the electrodialysis regeneration device provided by the embodiment works, under the drive of the direct current electric field of the power supply 10, a potential difference exists between the positive plate 14 and the negative plate 7, so that the dehumidifying solution cations 12 in the dilute solution retaining bin are driven to move towards the negative plate 7 and enter the concentrated solution retaining bin 16 through the cation exchange membrane 9; meanwhile, the dehumidified solution anions 15 in the dilute solution retaining bin move towards the positive plate 14 and enter the concentrated solution retaining bin 16 through the anion exchange membrane 11, so that the concentration of the solution in the concentrated solution retaining bin 16 is increased, the concentrated solution regenerated in the concentrated solution retaining bin 16 is output to the first liquid storage tank 8 through a pipeline, and the dehumidified solution diluted in the dilute solution retaining bin flows back to the second liquid storage tank 13; the reaction bin closest to the positive plate 14 generates chlorine gas due to the reaction, and the reaction bin closest to the negative plate 7 generates hydrogen gas due to the reaction, so that the liquid in the two reaction bins does not need to be recycled into the first liquid storage tank 8 or the second liquid storage tank 13.
Example III
As shown in fig. 5, an embodiment of the present invention provides a dehumidifying and heating system, which includes the air-spiral membrane dehumidifier 17 of the first embodiment and the electrodialysis regeneration device 20 of the second embodiment, and further includes a first liquid storage tank 8, a second liquid storage tank 13 and an absorption heat pump; the first liquid storage tank 8 and the second liquid storage tank 13 are respectively filled with a dehumidifying solution.
Specifically, the solution inlet 5 of the air spiral membrane dehumidifier 17 is communicated with the first liquid storage tank 8, the solution outlet 6 of the air spiral membrane dehumidifier 17 is communicated with the second liquid storage tank 13, and the first liquid storage tank 8 and the second liquid storage tank 13 are respectively communicated with the electrodialysis regeneration device 20; the absorption heat pump is connected between the first liquid storage tank 8 and the second liquid storage tank 13.
The absorption heat pump comprises a heat pump absorber 22, a third liquid storage tank 21 and a heat exchanger 19; the heat pump absorber 22 and the heat exchanger 19 are sequentially connected between the first liquid storage tank 8 and the second liquid storage tank 13, and the heat pump absorber 22 is also communicated with the third liquid storage tank 21 to form a closed circulation pipeline; the third liquid storage tank 21 contains water.
As an improvement, the dehumidifying and heating system provided in this embodiment further includes a blower 18, wherein the blower 18 is disposed at the air inlet 1 of the air disc type film dehumidifier 17, and is configured to blow air to be dehumidified into the air inlet 1 along the tangential direction of the air dehumidifying chamber 2.
When in operation, the dehumidification solution in the first liquid storage tank 8 flows into the second liquid storage tank 13 after passing through the air spiral type membrane dehumidifier 17 and the absorption heat pump respectively; the dehumidified solution in the second liquid storage tank 13 passes through the electrodialysis regeneration device 20 and then flows into the first liquid storage tank 8.
Specifically, when the dehumidification and heating system provided by the invention works, the concentrated solution in the first liquid storage tank 8 is pumped into the air spiral type membrane dehumidifier 17 and flows into the hollow fiber membrane tube bundle 23 to dehumidify, and the external environment fresh air is blown into the air spiral type membrane dehumidifier 17 by the blower 17, and then the dried air can be input into the indoor environment after being blown out from the air outlet 3. The dehumidified dehumidification solution absorbs water vapor so that the concentration becomes low, and the water vapor is collected into the second liquid storage tank 13 to be regenerated; when the heat pump absorber 22 works, the water in the third liquid storage tank 21 flows into the heat pump absorber 22, meanwhile, the concentrated solution in the first liquid storage tank 8 enters the heat pump absorber 22, the temperature of the solution rises after absorbing water vapor, the water in part of the heat pump absorber 22 absorbs heat through evaporation, the temperature of the water which is not evaporated is reduced, the high-temperature solution flows through the heat exchanger 19 to exchange heat with the fluid which needs to be heated by a user for use, and the dilute solution absorbing the water vapor also flows into the second liquid storage tank 13. During regeneration, the dilute solution in the second liquid storage tank 13 flows into the electrodialysis regeneration device 20 for regeneration, and the regenerated concentrated solution flows into the first liquid storage tank 8 for storage, so that the circulation of the whole dehumidification heating system is completed.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (5)
1. The air spiral type membrane dehumidifier is characterized by comprising an air dehumidifying cavity, a first solution cavity and a second solution cavity; the air dehumidifying cavity is hollow and cylindrical, and the first solution cavity and the second solution cavity are respectively connected to the outer parts of two end surfaces of the air dehumidifying cavity; the inside of the air dehumidifying cavity is provided with a plurality of hollow fiber membrane bundles arranged along the axial direction, and the hollow fiber membrane bundles are connected between two end surfaces of the air dehumidifying cavity to communicate the first solution cavity with the second solution cavity;
the first solution cavity is provided with a solution inlet, and the second solution cavity is provided with a solution outlet; the dehumidifying solution flows in from the solution inlet of the first solution cavity, flows into the second solution cavity through the hollow fiber membrane tube bundles and flows out from the solution outlet of the second solution cavity;
the side surface of the air dehumidifying cavity near one end of the second solution cavity is provided with an air inlet, and the middle part of the end surface of the air dehumidifying cavity near one end of the first solution cavity is provided with an air outlet communicated with the outside; moist air is blown in from the air inlet, dehumidified by the hollow fiber membrane tube bundle in the air dehumidifying cavity, and then dried air is blown out from the air outlet;
the air inlet direction of the air inlet is tangential to the side surface of the air dehumidifying cavity;
the plurality of hollow fiber membrane bundles in the air dehumidifying cavity are divided into N groups, and the hollow fiber membrane bundles of each group are sequentially surrounded into M circles of concentric circle arrays from inside to outside by taking the axle center of the air dehumidifying cavity as the center; the N groups of hollow fiber membrane bundles are also sequentially distributed from inside to outside to form concentric circles;
in M circles of concentric circular arrays formed by arranging the hollow fiber membrane bundles in the same group, the number of the hollow fiber membrane bundles arranged in each circular array is equal, and the hollow fiber membrane bundles in each circular array are uniformly distributed; wherein, a certain rotation angle is staggered between two adjacent circles of hollow fiber membrane tube bundles, so that any hollow fiber membrane tube bundle on the outer ring and two hollow fiber membrane tube bundles closest to the hollow fiber membrane tube bundles on the inner ring form an isosceles triangle;
in the adjacent two groups of hollow fiber membrane bundles, the number of hollow fiber membrane bundles located at the outer ring is twice the number of hollow fiber membrane bundles located at the inner ring.
2. The air spiral type membrane dehumidifier according to claim 1, wherein N is 3.ltoreq.n.ltoreq.8, and m=4.
3. A dehumidification and heating system, which is characterized by comprising the air spiral type membrane dehumidifier of any one of claims 1 to 2, and further comprising an electrodialysis regeneration device, a first liquid storage tank, a second liquid storage tank and an absorption heat pump; the first liquid storage tank and the second liquid storage tank are respectively provided with a dehumidifying solution;
the electrodialysis regeneration device comprises a power supply, a positive plate and a negative plate, wherein the positive plate is electrically connected with the positive electrode of the power supply, and the negative plate is electrically connected with the negative electrode of the power supply; a reaction tank is arranged between the positive plate and the negative plate, and the reaction tank is divided into a plurality of reaction chambers by a plurality of ion exchange membranes arranged parallel to the positive plate and the negative plate;
the ion exchange membranes comprise cation exchange membranes and anion exchange membranes, the cation exchange membranes and the anion exchange membranes are alternately arranged at intervals, the anion exchange membrane closest to the anode plate is the anion exchange membrane, and the cation exchange membrane closest to the cathode plate is the cation exchange membrane; a cation exchange membrane is arranged between every two adjacent anion exchange membranes, and an anion exchange membrane is arranged between every two adjacent cation exchange membranes;
in the reaction chambers, if the side wall close to the anode plate is a cation exchange membrane and the side wall close to the cathode plate is an anion exchange membrane, the reaction chamber is a concentrated solution retention chamber; if the side wall close to the anode plate is an anion exchange membrane and the side wall close to the cathode plate is a cation exchange membrane, the reaction bin is a dilute solution retention bin;
each concentrated solution retaining bin is communicated with the first liquid storage tank through a pipeline to form a closed circulation loop, and each dilute solution retaining bin is communicated with the second liquid storage tank through a pipeline to form a closed circulation loop;
the power supply is a solar photovoltaic cell;
the solution inlet of the air spiral type membrane dehumidifier is communicated with the first liquid storage tank, the solution outlet of the air spiral type membrane dehumidifier is communicated with the second liquid storage tank, and the first liquid storage tank and the second liquid storage tank are respectively communicated with the electrodialysis regeneration device; the absorption heat pump is connected between the first liquid storage tank and the second liquid storage tank;
the dehumidification solution in the first liquid storage tank flows into the second liquid storage tank after passing through the air spiral type membrane dehumidifier and the absorption heat pump respectively; the dehumidified solution in the second liquid storage tank flows into the first liquid storage tank after passing through the electrodialysis regeneration device.
4. A dehumidification heating system according to claim 3, wherein the absorption heat pump comprises a heat pump absorber, a third liquid storage tank and a heat exchanger; the heat pump absorber and the heat exchanger are sequentially connected between the first liquid storage tank and the second liquid storage tank, and the heat pump absorber is also communicated with the third liquid storage tank to form a closed circulation pipeline; the third liquid storage tank is filled with water.
5. A dehumidification and heating system as set forth in claim 3, further comprising a blower provided at an air inlet of the air-coil type film dehumidifier for blowing air to be dehumidified into the air inlet in a tangential direction of the air dehumidifying chamber.
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| US11185823B2 (en) | 2018-11-26 | 2021-11-30 | Palo Alto Research Center Incorporated | Electrodialytic system used to remove solvent from fluid and non-fluid flows |
| US11117090B2 (en) * | 2018-11-26 | 2021-09-14 | Palo Alto Research Center Incorporated | Electrodialytic liquid desiccant dehumidifying system |
| US11015875B2 (en) | 2019-04-17 | 2021-05-25 | Palo Alto Research Center Incorporated | Electrochemical heat pump |
| WO2021052278A1 (en) * | 2019-09-16 | 2021-03-25 | 杭州三花研究院有限公司 | Vehicle air conditioning system |
| US11925903B2 (en) | 2020-12-18 | 2024-03-12 | Xerox Corporation | Electrodialysis heat pump |
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| US11944934B2 (en) | 2021-12-22 | 2024-04-02 | Mojave Energy Systems, Inc. | Electrochemically regenerated liquid desiccant dehumidification system using a secondary heat pump |
| WO2024129618A1 (en) | 2022-12-12 | 2024-06-20 | Mojave Energy Systems, Inc. | Liquid desiccant air conditioning system and control methods |
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