CN118122141B - Membrane separation device and method - Google Patents
Membrane separation device and method Download PDFInfo
- Publication number
- CN118122141B CN118122141B CN202410551098.3A CN202410551098A CN118122141B CN 118122141 B CN118122141 B CN 118122141B CN 202410551098 A CN202410551098 A CN 202410551098A CN 118122141 B CN118122141 B CN 118122141B
- Authority
- CN
- China
- Prior art keywords
- fresh water
- membrane separation
- conductive porous
- porous
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000012528 membrane Substances 0.000 title claims abstract description 100
- 238000000926 separation method Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title description 14
- 239000013505 freshwater Substances 0.000 claims abstract description 105
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 104
- 239000012141 concentrate Substances 0.000 claims description 32
- 230000002209 hydrophobic effect Effects 0.000 claims description 28
- -1 polytetrafluoroethylene Polymers 0.000 claims description 25
- 239000000758 substrate Substances 0.000 claims description 22
- 238000012544 monitoring process Methods 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 18
- 230000004888 barrier function Effects 0.000 claims description 9
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 9
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 9
- 238000005507 spraying Methods 0.000 claims description 7
- 239000002033 PVDF binder Substances 0.000 claims description 5
- 239000003575 carbonaceous material Substances 0.000 claims description 5
- 238000009833 condensation Methods 0.000 claims description 5
- 230000005494 condensation Effects 0.000 claims description 5
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 4
- 229920001940 conductive polymer Polymers 0.000 claims description 4
- 239000000112 cooling gas Substances 0.000 claims description 4
- 238000007598 dipping method Methods 0.000 claims description 4
- 238000004528 spin coating Methods 0.000 claims description 4
- 238000000967 suction filtration Methods 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 238000005137 deposition process Methods 0.000 claims 1
- 235000002639 sodium chloride Nutrition 0.000 description 25
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 24
- 150000002500 ions Chemical class 0.000 description 16
- 239000012267 brine Substances 0.000 description 15
- 238000004519 manufacturing process Methods 0.000 description 15
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 15
- 238000012806 monitoring device Methods 0.000 description 14
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 13
- 238000004821 distillation Methods 0.000 description 13
- 230000004907 flux Effects 0.000 description 11
- 125000006850 spacer group Chemical group 0.000 description 11
- 230000010287 polarization Effects 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- 238000010612 desalination reaction Methods 0.000 description 9
- 229910021393 carbon nanotube Inorganic materials 0.000 description 8
- 239000002041 carbon nanotube Substances 0.000 description 8
- 239000011780 sodium chloride Substances 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 6
- 239000002134 carbon nanofiber Substances 0.000 description 6
- 229910021389 graphene Inorganic materials 0.000 description 6
- 230000001965 increasing effect Effects 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 239000013535 sea water Substances 0.000 description 6
- 238000003795 desorption Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000010355 oscillation Effects 0.000 description 5
- 238000001179 sorption measurement Methods 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000002425 crystallisation Methods 0.000 description 4
- 230000008025 crystallization Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 239000010842 industrial wastewater Substances 0.000 description 4
- 229910017053 inorganic salt Inorganic materials 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 238000002791 soaking Methods 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- 238000009736 wetting Methods 0.000 description 4
- 239000002028 Biomass Substances 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 239000006229 carbon black Substances 0.000 description 3
- 239000004917 carbon fiber Substances 0.000 description 3
- 239000008367 deionised water Substances 0.000 description 3
- 229910021641 deionized water Inorganic materials 0.000 description 3
- 238000003487 electrochemical reaction Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 230000020169 heat generation Effects 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 3
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 3
- 230000002572 peristaltic effect Effects 0.000 description 3
- 229920000915 polyvinyl chloride Polymers 0.000 description 3
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000001223 reverse osmosis Methods 0.000 description 3
- 238000007740 vapor deposition Methods 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000004939 coking Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 239000001103 potassium chloride Substances 0.000 description 2
- 235000011164 potassium chloride Nutrition 0.000 description 2
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 2
- 229910052939 potassium sulfate Inorganic materials 0.000 description 2
- 235000011151 potassium sulphates Nutrition 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 description 2
- 235000011152 sodium sulphate Nutrition 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- SXRSQZLOMIGNAQ-UHFFFAOYSA-N Glutaraldehyde Chemical compound O=CCCCC=O SXRSQZLOMIGNAQ-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000007701 flash-distillation Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000010841 municipal wastewater Substances 0.000 description 1
- 238000001728 nano-filtration Methods 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011257 shell material Substances 0.000 description 1
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 238000001132 ultrasonic dispersion Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/08—Prevention of membrane fouling or of concentration polarisation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/32—By heating or pyrolysis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to a membrane separation device and a membrane separation method. The membrane separation device includes: the device comprises a high-frequency alternating current power supply and at least one pair of conductive porous functional films which are oppositely arranged at intervals, wherein a concentrated water channel for concentrated water is formed in the space on the inner side of each conductive porous functional film, a fresh water channel for fresh water is formed in the space on the outer side of each conductive porous functional film, each conductive porous functional film is electrically connected with the high-frequency alternating current power supply, high-frequency alternating current is applied to the conductive porous functional film through the high-frequency alternating current power supply, so that the concentrated water generates heat and water vapor, and the water vapor enters the fresh water channel through the conductive porous functional film to obtain fresh water.
Description
Technical Field
The invention relates to the technical field of separation or water treatment, in particular to the technical field of brine separation.
Background
Fresh water resource shortage has become an important factor restricting sustainable development of human society, and the use of desalination technology to obtain fresh water resources from seawater or wastewater is considered as a viable strategy. This places higher demands on desalination plants.
The traditional desalination technology is mainly based on reverse osmosis and nanofiltration processes, however, the high pressure required to overcome the osmotic pressure of high-concentration brine is easy to cause membrane component breakage, and limits the application of the technology in key industrial wastewater. In addition, conventional thermal desalination processes, such as multi-effect distillation and multi-stage flash distillation, while improving the desalination and concentration capabilities of high-strength brine, require bulky processing equipment, high operating energy consumption, and capital costs.
Although the membrane distillation technology developed in recent years can be used for desalination of sea water or waste water, the technology is affected by small distillation flux, easy scaling of the membrane and poor stability in the practical application process. Specifically, 1) temperature difference polarization exists on the surface of the hydrophobic membrane, namely the temperature of the membrane surface at one side of the concentrated water chamber is lower than the temperature of the main body of the brine, so that the heat utilization efficiency is low and the water yield flux is low when the brine flows through the concentrated water chamber in a single pass; 2) Concentration polarization exists on the surface of the hydrophobic membrane, namely, the salt concentration on the surface of the membrane in the desalting process is higher than the concentration of the main body of the brine, so that scale ions such as calcium, magnesium, sulfate radical and the like in the brine are accumulated on the surface of the hydrophobic membrane, mineral scale is generated to block membrane pores, and the flux of the membrane is reduced, even the wetting of the hydrophobic membrane is disabled; 3) In conventional membrane distillation, brine needs to be heated externally in a conductive manner, and a rapid circulation reflux process is generally required, which increases not only system complexity and construction cost, but also heat loss and brine circulation energy consumption; 4) With the increase of the length of the feed channel and the size of the membrane component, the average transmembrane temperature difference at two sides of the hydrophobic membrane is gradually reduced, so that the mass transfer driving force of the water vapor is reduced, and the device is not beneficial to the enlargement of the device.
Disclosure of Invention
In order to solve the problems of membrane surface temperature difference polarization, concentration polarization and membrane surface ion crystallization, the invention provides a membrane separation device and a membrane separation method.
One of the present invention provides a membrane separation device comprising: the device comprises a high-frequency alternating-current power supply and at least one pair of conductive porous functional films which are oppositely arranged at intervals, wherein a concentrated water channel for concentrated water is formed in the space on the inner side of each conductive porous functional film, a fresh water channel for fresh water is formed in the space on the outer side of each conductive porous functional film, each conductive porous functional film is electrically connected with the high-frequency alternating-current power supply, the high-frequency alternating-current power supply is used for applying high-frequency alternating current to the conductive porous functional films to enable the concentrated water to self-generate heat and generate water vapor, and the water vapor penetrates through the conductive porous functional films and enters the fresh water channel to obtain fresh water. Wherein, apply the high-frequency alternating current to the electrically conductive porous functional film through the high-frequency alternating current power, the heat in the dense water passageway is not from conduction heating, but dense water self even generates heat. Wherein, the concentrated water in the concentrated water channel can not flow or flow. When the concentrated water in the concentrated water channel is communicated with the outside and flows, continuous desalination of the concentrated water can be realized.
In one specific embodiment, each conductive porous functional film comprises a porous hydrophobic substrate and a porous conductive layer compounded with the porous hydrophobic substrate, wherein the porous hydrophobic substrate is positioned on one side of the fresh water channel, and the porous conductive layer is positioned on one side of the concentrated water channel. When high-frequency alternating current is applied to the conductive porous functional film, the porous conductive layer is subjected to high-frequency ion adsorption and desorption, so that Faraday electrochemical reaction is inhibited, deposition and crystallization of ions on the surface of the film are avoided, scaling and wetting of the surface of the conductive porous functional film are reduced, and long-term operation stability of the conductive porous functional film is improved; because salt ions migrate through high-frequency vibration under an alternating current field, the concentration accumulation of ions on the surface of the porous conductive layer caused by water vapor film penetration is reduced, and concentration polarization of the surface of the conductive porous functional film is eliminated.
In one embodiment, the material from which the porous hydrophobic substrate is made comprises at least one of polytetrafluoroethylene, polyvinylidene fluoride, and ceramic. For example, materials for preparing the porous hydrophobic substrate include polytetrafluoroethylene, polyvinylidene fluoride, or ceramic. In addition, the porous hydrophobic substrate may be made of a mixed or composite material of polytetrafluoroethylene and polyvinylidene fluoride. Wherein the porous hydrophobic substrate is insulating or non-conductive.
In one embodiment, the material from which the porous conductive layer is made comprises at least one of a carbon-based material, a metal-based material, and a conductive polymer. For example, the material from which the porous conductive layer is made includes a carbon-based material, a metal-based material, or a conductive polymer. The carbon-based material may include at least one of activated carbon, carbon black, carbon nanotubes, graphene, and carbon fibers. For example, the carbon-based material may include activated carbon, carbon black, carbon nanotubes, graphene, or carbon fibers.
In one embodiment, the material from which the porous conductive layer is made comprises at least one of carbon nanofiber interpenetrating graphene anchored molybdenum disulfide, biomass carbon, and electrospun carbon nanofibers. For example, materials for preparing the porous conductive layer include carbon nanofiber interpenetrating graphene anchored molybdenum disulfide, biomass carbon, or electrospun carbon nanofibers.
In one embodiment, the porous conductive layer has an electrode patch disposed thereon.
In one embodiment, the porous conductive layer is built onto the porous hydrophobic substrate by spin coating, suction filtration, spray coating, dipping, or vapor deposition.
In one embodiment, the membrane separation device further comprises a housing, a pair of conductive porous functional membranes are fixed in parallel in the housing, and a fresh water channel is formed between the housing and the conductive porous functional membranes.
In one embodiment, the membrane separation device comprises a pair of electrically conductive porous functional membranes.
In one embodiment, a first insulating barrier and a second insulating barrier for supporting the electrically conductive porous functional membrane are independently provided in the concentrate passage and the fresh water passage. The insulating barrier can be used to support the electrically conductive porous functional membrane on the one hand and to avoid contact between a pair of electrically conductive porous functional membranes on the other hand.
In one embodiment, cold water or cooling gas is introduced into the fresh water channel, or the fresh water channel is evacuated to effect condensation and transport of water vapor entering the fresh water channel.
In one embodiment, the membrane separation device further comprises an on-line monitoring module, wherein the on-line monitoring module comprises a temperature monitoring device for monitoring the temperature of the inlet and outlet of the concentrated water channel and/or the fresh water channel, a quality monitoring device for monitoring the quality of the concentrated water and/or the fresh water, a conductivity monitoring device for monitoring the conductivity of the fresh water, and an energy intensity monitoring device for monitoring the energy input intensity of the high-frequency alternating-current power supply.
In one embodiment, the frequency of the high frequency alternating current is 1 kHz or more.
In a specific embodiment, the frequency of the high frequency alternating current is between 1 kHz and 1 MHz.
In one embodiment, the voltage of the high frequency alternating current is greater than 0V.
In one embodiment, the voltage of the high frequency alternating current is greater than 0V and less than 1.2V.
In one embodiment, the voltage of the high frequency alternating current is 1.2V or more.
In a specific embodiment, the voltage of the high frequency alternating current is between 1.2V and 3V.
In one embodiment, the voltage of the high-frequency alternating current is 3V or more.
In one embodiment, the concentration of salt ions in the concentrate is greater than or equal to 1 g/L.
In one embodiment, the concentration of salt ions in the concentrated water is greater than or equal to 5 g/L.
In one embodiment, the concentration of salt ions in the concentrated water is greater than or equal to 10 g/L.
In one embodiment, the salt may be any inorganic salt, such as at least one of sodium chloride, potassium chloride, sodium sulfate, potassium sulfate, and the like.
The second aspect of the present invention provides a membrane separation method comprising: forming a concentrated water channel for concentrated water by adopting at least one pair of conductive porous functional films which are arranged at intervals, and forming fresh water channels for fresh water on two sides of the concentrated water channel; applying high-frequency alternating current to the conductive porous functional film to enable the concentrated water to self-generate heat and generate water vapor, wherein the water vapor penetrates through the conductive porous functional film and enters the fresh water channel to obtain fresh water.
In one embodiment, the membrane separation method further comprises: the flow direction of the concentrated water in the concentrated water channel is opposite to the flow direction of the fresh water in the fresh water channel.
In a specific embodiment, the salt may be any inorganic salt, such as at least one of sodium chloride, potassium chloride, sodium sulfate, potassium sulfate, and the like.
The invention has the beneficial effects that: 1) The invention discovers that the high-frequency alternating current can lead the brine to self-generate heat and lead the brine to uniformly generate heat for the first time, which can avoid energy transfer based on a heat conduction mechanism and solve the problem of uneven heating of concentrated water (brine), thus being beneficial to eliminating the temperature difference polarization phenomenon of the membrane and enhancing the heat transfer efficiency and the water generation rate; 2) Under the action of high-frequency alternating current, ions on the surface and nearby of the conductive porous functional film generate high-frequency oscillation, which is beneficial to reducing the concentration accumulation of ions caused by massive evaporation of water, eliminating concentration polarization on the surface of the film, and strengthening the water production rate and the scale inhibition on the surface of the film; 3) Under the action of high-frequency alternating current, ions on the surface of the conductive porous functional film are subjected to high-frequency adsorption and desorption, so that the ions are prevented from adhering, nucleating and crystallizing on the surface of the film, and the pollution resistance of the film surface is enhanced; 4) Under the action of high-frequency alternating current, ions on the surface of the conductive porous functional film are subjected to non-Faraday processes of high-frequency adsorption and desorption, faraday chemical reactions such as water electrolysis and material corrosion do not occur, and the stability and heat energy efficiency of the electrode material are maintained; 5) By increasing the alternating current frequency, high energy density can be realized under lower voltage input, and high-strength heat production and high-flux water production of the brine are promoted; 6) The membrane separation device based on high-frequency alternating current has high heat generation intensity, can adopt a single-pass continuous flow operation mode, is beneficial to reducing energy loss and operation cost, and is simple and convenient in process flow; 7) The membrane separation device has the advantages of compact modular structure, small occupied area, high water yield and the like, and can realize desalination and concentration treatment of various saline water such as seawater, municipal sewage concentrate and industrial wastewater.
Drawings
Fig. 1 shows a schematic structure of a membrane separation device according to an embodiment of the present invention.
FIG. 2 shows a plot of AC frequency versus power density for brine (100 g/L NaCl) at various voltages, in accordance with an embodiment of the present invention.
Detailed Description
The invention is further illustrated below with reference to the examples, which are merely illustrative of the invention and do not constitute a limitation of the invention in any way.
Fig. 1 shows a structure of a membrane separation device 100 according to an embodiment of the present invention. As shown in fig. 1, the membrane separation device 100 may include: a high frequency alternating current power source 1 and at least one pair of conductive porous functional films 2 arranged at an opposite interval. A concentrate passage 5 for concentrate flow is formed between the inner sides of the pair of conductive porous functional films 2. The outer sides of the pair of conductive porous functional films 2 are respectively formed as fresh water channels 6 for fresh water flow. Each conductive porous functional film 2 is connected to a high-frequency alternating current power supply 1. In the working process of the high-frequency alternating current power supply 1, when high-frequency alternating current is applied to the conductive porous functional film 2, salt ions in concentrated water generate high-frequency oscillation and self-heat generation, so that the concentrated water is directly and uniformly heat-generated, and water vapor generated by heat of the concentrated water enters the fresh water channel 6 to be condensed so as to obtain fresh water, and meanwhile, the concentrated water in the concentrated water channel 5 is concentrated. In the present invention, concentrated water refers to water having a relatively high concentration of salt ions, which is particularly relevant to fresh water in a fresh water channel, and the membrane separation device 100 is particularly suitable for brine having a concentration of salt ions of 1 g/L or more, so as to ensure a certain conductivity; whereas the salt ion concentration of fresh water is relatively reduced relative to concentrated water, for example, the salt ion concentration of fresh water may be 0.01 g/L.
In order to realize mass production, water in the concentrate channel 5 and the fresh water channel 6 may flow. In a specific embodiment, the flow direction of the water vapor may be referred to as the direction of the dashed arrow shown in fig. 1, the flow direction of the concentrated water may be referred to as the direction of the black arrow shown in fig. 1, and the flow direction of the fresh water may be referred to as the direction of the gray arrow shown in fig. 1. The concentrated water channel 5 and the fresh water channel 6 can be used for fluid transportation by adopting power devices such as peristaltic pumps, centrifugal pumps and the like.
In the operation process of the membrane separation device 100 of the embodiment of the invention, a pair of conductive porous functional membranes 2 are connected with a high-frequency alternating current power supply 1, the pair of conductive porous functional membranes 2 are used as the surfaces of a concentrated water channel, and when high-frequency current is applied, on one hand, the surfaces have high-frequency ion adsorption and desorption behaviors, so that Faraday electrochemical reaction is inhibited; on the other hand, salt ions in the concentrated water between the pair of conductive porous functional films 2 self-generate heat due to high-frequency oscillation, so that the concentrated water directly and uniformly generates heat, the process avoids the energy transfer by the indirect heat conduction mechanism of the traditional film distillation, is beneficial to eliminating the temperature difference polarization phenomenon on the film surface, and enhances the heat transfer efficiency and the water production flux. In addition, as ions in the concentrated water generate high-frequency vibration migration under an alternating current electric field, the ion concentration accumulation on the surface of the conductive porous functional film 2 caused by water evaporation and film passing is reduced, the phenomenon of concentration polarization on the surface of the film is eliminated, the water production flux is enhanced, the crystallization of the inorganic salt film surface is reduced, the film wetting is inhibited, and the long-term operation stability of the conductive porous functional film 2 is improved. The membrane separation device 100 of the embodiment of the invention can be widely used for treating seawater and various saline water, such as different saline water such as industrial wastewater including seawater, coking wastewater, reverse osmosis concentrated water and the like, municipal wastewater and the like.
According to the present invention, in the preferred embodiment shown in fig. 1, the conductive porous functional film 2 may include a porous hydrophobic substrate 21 and a porous conductive layer 22 composited with the porous hydrophobic substrate 21, the porous conductive layer 22 facing the concentrate channel 5, i.e., the porous conductive layer 22 is located at one side of the concentrate channel 5; the porous hydrophobic substrate 21 faces the fresh water channel 6, and the porous hydrophobic substrate 21 is located on one side of the fresh water channel 6. Wherein the porous conductive layer 22 is for connection to a high frequency ac power source 1.
Preferably, the porous hydrophobic substrate 21 may be made of polytetrafluoroethylene, polyvinylidene fluoride, or ceramic-based materials; the porous conductive layer 22 may be made of carbon-based, metal-based, or conductive polymers. Further, the carbon base can be porous activated carbon, carbon black, carbon nanotubes, graphene or carbon fibers, etc.
Also preferably, the porous conductive layer 22 may be built onto the porous hydrophobic substrate 21 by spin coating, suction filtration, spray coating, dipping or vapor deposition.
In a preferred embodiment, the porous conductive layer 22 may be made of carbon nanotube material, the porous hydrophobic substrate 21 is made of polytetrafluoroethylene, and the conductive porous functional film 2 may be prepared as follows: firstly, preparing a carbon nano tube solution with the mass fraction of 0.2%, adding sodium dodecyl benzene sulfonate with the mass fraction of 0.1% as a surfactant, and performing ultrasonic dispersion on the solution to obtain 1 h; then spraying the uniformly dispersed carbon nano tube solution on the surface of a polytetrafluoroethylene hydrophobic membrane, wherein the spraying density is 2 mg/cm 2; simultaneously spraying a polyvinyl alcohol solution with the volume ratio of 20:1 (carbon nano tube: polyvinyl alcohol) as a binder, and cleaning the sprayed composite film with deionized water for 30 min to remove the surfactant; and then soaking the composite membrane in glutaraldehyde solution (the solvent is deionized water) with the volume fraction of 4.4%, wherein the temperature of the soaking solution is 70 ℃, the soaking time is 1h, washing the composite membrane with deionized water for 30 min after the soaking is finished, and drying in vacuum to obtain the conductive porous functional membrane 2.
In other preferred embodiments, the porous conductive layer 22 may also be made of other materials, such as carbon nanofiber interpenetrating graphene anchored molybdenum disulfide, biomass charcoal, or electrospun carbon nanofibers. By regulating and controlling the technical parameters and the performance of the material, the porous conductive layer 22 can have the characteristics of high porosity, good conductive performance, good cycling stability, excellent electrochemical performance and the like; the prepared porous conductive layer 22 is constructed on the porous hydrophobic substrate 21 by adopting the spin coating, suction filtration, spray coating, dipping or vapor deposition modes, so that the performance indexes such as heat production, water production flux, stability and the like of the high-salt concentrated water are further enhanced.
According to the present invention, in a preferred embodiment as shown in fig. 1, the membrane separation device 100 may include a pair of conductive porous functional membranes 2, and the membrane separation device 100 further includes a housing 4, in which the pair of conductive porous functional membranes 2 are fixed in parallel in the housing 4, and a fresh water channel 6 is formed between the housing 4 and the conductive porous functional membranes 2. In this embodiment, the pair of conductive porous functional membranes 2 divide the interior of the housing 4 into three spaces, namely, the concentrate channel 5 and the fresh water channels 6 located on both sides of the concentrate channel 5, and the housing 4 directly participates in forming the fresh water channels 6, which arrangement makes the structure of the membrane separation device 100 simpler and more compact, modularly producible, smaller in occupied area, higher in energy utilization efficiency and water production flux.
Preferably, the housing 4 can be made into various configurations, such as flat plate, rolled and tubular configurations, and the materials can be selected from various materials such as acrylic plates, polytetrafluoroethylene and the like.
Preferably, the membrane separation device 100 may further comprise a plurality of pairs of electrically conductive porous membranes 2. Wherein, the pairs of conductive porous membranes 2 can be arranged at intervals in a direction substantially perpendicular to the water flow, and fresh water channels 6 can be shared between two adjacent pairs of conductive porous membranes 2. Thus, a multistage stacked membrane distillation device with a concentrated water channel 5-fresh water channel 6 alternating structure similar to … fresh water-concentrated water-fresh water … can be formed. In this membrane separation device 100, a concentrated water passage 5 is formed between the porous conductive layers 22 in one pair of conductive porous functional membranes 2, and a fresh water passage is formed between the porous hydrophobic substrates 21 in two adjacent pairs of conductive porous functional membranes 2. Through the interval arrangement of a plurality of pairs of conductive porous functional films 2, the film filling density can be improved, the using amount of shell materials is reduced, the heat loss is reduced, and the overall performance is improved.
Further, in a preferred embodiment as shown in fig. 1, the membrane separation device 100 may further comprise a first insulating barrier 3. The first insulating barrier 3 is disposed in the concentrate passage 5. The first insulating spacer 3 is mainly used to prevent a pair of porous conductive layers 22 from contacting to maintain the physical structure of the porous conductive layers 22 stable. Structurally, both sides of the first insulating spacer 3 are respectively abutted against the pair of porous conductive layers 22, that is, the thickness of the first insulating spacer 3 may be equivalent to the width of the concentrate passage. It can be seen that the first insulating spacer 3 can support and fix the conductive multifunctional film 2, and can also limit the relative positions of a pair of conductive porous functional films 2, so as to ensure normal operation. The first insulating spacer 3 needs to have high temperature resistance and corrosion resistance, and can be arranged in a grid shape; or the first insulating spacer 3 may also have a porous nature. For example, the first insulating spacer 3 may be made of polypropylene or polyvinyl chloride, and the thickness thereof may be selected according to need, for example, 1 mm. Wherein, the arrangement of the grid or the use of the porous material can avoid blocking the flow of the concentrated water in the concentrated water channel.
According to the invention, the fresh water channel 6 can realize condensation and transportation of the water vapor entering the fresh water channel by introducing cold water, cooling gas or vacuumizing, so that the fresh water channel 6 can operate in different modes such as direct contact membrane distillation, air gap membrane distillation, gas sweeping membrane distillation, vacuum membrane distillation and the like.
It will be appreciated that a second insulating barrier 7 is provided in the fresh water channel 6. The second insulating spacer 7 is abutted to the conductive multifunctional film 2 to support the conductive multifunctional film 2, so as to maintain the structural stability of the conductive multifunctional film 2. While the second insulating spacer 7 also defines a fresh water flow space as a fresh water channel 6. The second insulating spacer 7 needs to have high temperature resistance and corrosion resistance, and can be arranged in a grid shape; or the second insulating barrier 7 may also have a porous nature. For example, the second insulating spacer 7 may be made of polypropylene or polyvinyl chloride, and the thickness thereof may be selected according to need, for example, 5 mm. Wherein, the porous material is arranged in a grid shape or can avoid blocking the fresh water from flowing in the fresh water channel.
In a preferred embodiment, the membrane separation device 100 may further include a fresh water pipeline (not shown in the drawing, for example, may be located at the left and right sides of the fresh water channel 6 shown in fig. 1) communicating with the fresh water channel 6 and a concentrate pipeline (not shown in the drawing, for example, may be located at the left and right sides of the concentrate channel 5 shown in fig. 1) communicating with the concentrate channel 5 for delivering concentrate, which may be in communication with an external concentrate storage tank, through which concentrate in the concentrate storage tank enters the concentrate channel 5 and then is discharged; the fresh water pipeline can be communicated with an external fresh water collecting tank, and desalted fresh water generated by condensation of the fresh water entering the fresh water channel 6 enters the fresh water collecting tank to be collected through the fresh water pipeline.
Preferably, the materials of the concentrated water pipeline and the fresh water pipeline have corrosion resistance and the like, and can be polyvinyl chloride, polystyrene and the like; it is also preferable that a cooling means for increasing the difference in vapor pressure between the concentrate passage 5 and the fresh water passage 6 is added to the fresh water line at the upstream end of the membrane separation means, and for example, an intelligent cryostat may be provided at the upstream end of the fresh water line (the end into which cooling water or cooling gas is introduced or evacuated).
Furthermore, according to the present invention, the membrane separation device 100 may further include an on-line monitoring module (not shown in the drawings) including a temperature monitoring device for monitoring temperatures of the inlet and outlet of the concentrate and fresh water channels, a quality monitoring device for monitoring quality of the concentrate and fresh water, a conductivity monitoring device for monitoring conductivity of the fresh water, and an energy intensity monitoring device for monitoring energy input intensity of the high frequency ac power source. The gain output ratio and the water production energy consumption (kWh/m 3) of the system can be calculated according to the inlet and outlet temperatures of the concentrated water channel 5 and the fresh water channel 6, the water production flux (acquired by the quality monitoring device) and the input energy intensity.
Preferably, the temperature monitoring device can select a thermocouple thermometer; the quality monitoring device can be preferably arranged in the concentrated water storage tank and the fresh water collection tank respectively so as to record the concentrated water reduction and the fresh water increase, and an electronic analytical balance can be selected; the fresh water conductivity monitoring device can be a conductivity meter; the energy intensity monitoring device can be an ammeter, a voltmeter, a power meter and the like, and can be connected with the high-frequency alternating current power supply 1 to monitor the running voltage, the running current and the running power density of the system in real time; the terminals of all the above monitoring devices can be connected to a computer for data recording and saving.
According to the invention, the research shows that the impedance values of the concentrated water with different salt contents are related to the frequency provided by the high-frequency alternating-current power supply 1, and the impedance values gradually decrease along with the increase of the frequency provided by the high-frequency alternating-current power supply 1, which shows that the high-frequency alternating-current power supply can increase the current of the concentrated water and strengthen the input power density of the system. Therefore, the input energy intensity of the high-frequency alternating current power supply 1 can be increased by increasing the frequency of the alternating current within a reasonable range, thereby promoting the high-intensity heat generation and the high-flux water generation of the concentrated water and further improving the separation efficiency of the membrane separation device 100. In order to ensure the separation quality, the frequency of the high-frequency alternating current power supply is not less than 1 kHz.
As shown in fig. 2, when the power supply frequency is converted from a direct current of 0 Hz to an alternating current, the power density thereof increases rapidly from 0 kW/m 2. When the alternating current frequency is higher than 1 kHz, the heat-generating power density is kept stable and does not change with the increase of the frequency. At the same time, as the voltage increases, the heat generation power density increases significantly. At a voltage of 1.2V, a power density of 10 kW/m 2 at high frequencies above 1 kHz, which is already far above the energy intensity of conventional solar energy (1 kW/m 2), can theoretically produce a water production flux of about 16L/(m 2 h) in membrane distillation. When the voltage is increased to 3V, the power density at high frequency can reach more than 60 kW/m 2. The power density is far higher than that of the traditional electrothermal film distillation system, and the high-flux water production of the film distillation can be realized. Thus, in the actual production process, the frequency of the high-frequency ac power supply of the membrane separation apparatus 100 is not less than 1 kHz for ensuring the stability of the heat-generating power density, and the voltage of the high-frequency ac power supply can be selected in consideration of parameters such as the water-generating flux.
In addition, the membrane separation method according to an embodiment of the present invention may include: forming a concentrate channel 5 for circulating concentrate by adopting at least one pair of oppositely arranged conductive porous functional films 2, and forming fresh water channels 6 for circulating fresh water on two sides of the concentrate channel 5; high-frequency alternating current is applied to the conductive porous functional film 2 so that salt ions in concentrated water can perform high-frequency oscillation to uniformly self-generate heat, and the generated water vapor enters the fresh water channel 6 through the conductive porous functional film 2 to be condensed to form fresh water. And meanwhile, the concentrated water in the concentrated water channel 5 realizes desalination and concentration. In practical application, the frequency of the high-frequency alternating current is not less than 1 kHz, and the concentration of salt ions in the concentrated water is more than or equal to 1 g/L.
The membrane separation method of the embodiment of the invention directly adopts at least one pair of oppositely arranged conductive porous functional membranes 2 to form a concentrated water channel 5 for circulating concentrated water, and forms fresh water channels 6 at two sides of the concentrated water channel 5, and the conductive porous functional membranes 2 are applied with high-frequency alternating current to perform high-frequency oscillation on salt ions in the concentrated water to uniformly self-generate heat. And meanwhile, the surface of the conductive porous functional film 2 is subjected to high-frequency ion adsorption and desorption, so that Faraday electrochemical reaction is inhibited. In addition, as ions in the concentrated water generate high-frequency vibration migration under an alternating current electric field, the ion concentration accumulation on the surface of the conductive porous functional film 2 caused by water evaporation and film passing is reduced, the phenomenon of concentration polarization on the surface of the film is eliminated, the water production flux is enhanced, the crystallization of the inorganic salt film surface is reduced, the film wetting is inhibited, and the long-term operation stability of the conductive porous functional film 2 is improved. The membrane separation method provided by the embodiment of the invention is simple and easy to implement, has high separation efficiency, and can be widely used for treating various saline waters, such as industrial wastewater including seawater, coking wastewater, reverse osmosis concentrated water, municipal sewage, and the like.
In a preferred embodiment, the membrane separation method of the embodiment of the present invention may further include: the flow direction of the fluid in the concentrate passage 5 is reversed to the flow direction of the fluid in the fresh water passage 6. This approach is advantageous for increasing the vapor pressure difference across the concentrate channel 5 and the fresh water channel 6, thereby achieving a more sufficiently rapid condensation and transport of the vapor entering the fresh water channel 6.
Based on the membrane separation apparatus and method of the present invention, in one specific embodiment, the following performance test experiments may be performed thereon.
The membrane area of the conductive porous functional membrane 2 is designed to be 9 cm 2, and the conductive porous functional membrane 2 is made of carbon nano-tube sprayed polytetrafluoroethylene materials. Preparing NaCl solution with the concentration of 100 g/L, pouring the solution into a concentrated water storage tank placed in an electronic analytical balance, conveying the saline solution into a concentrated chamber through a peristaltic pump, enabling fresh water placed on the analytical balance to enter a fresh water channel sequentially through the peristaltic pump and an intelligent low-temperature constant-temperature tank, enabling the concentrated water and the fresh water to run in parallel countercurrent mode, enabling the flow rate of fluid in the concentrated water channel 5 and the fresh water channel 6 to be 0.8 mL/min and 1.6 mL/min respectively, switching on a high-frequency alternating current power supply 1 and a power meter connected with the high-frequency alternating current power supply, regulating and controlling the output power density to be 5 KW/m 2, and simultaneously starting the analytical balance, a micro thermocouple and a conductivity meter, and recording the changes of water mass, inlet-outlet temperature and conductivity in the concentrated water channel 5 and the fresh water channel 6 in the running process of the system, wherein the results are as follows: when single-pass continuous flow operation is adopted, the inlet temperature of the concentrated water channel 5 is 20 ℃, the outlet temperature of the concentrated water channel 5 is 45 ℃, the inlet temperature of the fresh water channel 6 is 8 ℃, the outlet temperature of the fresh water channel 6 is 18 ℃, the system operation voltage is about 2.1V, the current is about 2.48A, and the water yield is about 4.8L/(m 2 h).
Although the invention has been described with reference to specific embodiments, those skilled in the art will appreciate that various modifications might be made without departing from the true spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation, structure, material, composition of matter and method to the teachings of the invention. All such modifications are intended to be included within the scope of this invention as defined in the following claims.
Claims (10)
1. A membrane separation device, comprising: the device comprises a high-frequency alternating current power supply and at least one pair of conductive porous functional films which are oppositely arranged at intervals, wherein a concentrated water channel for concentrated water is formed in the space on the inner side of each conductive porous functional film, a fresh water channel for fresh water is formed in the space on the outer side of each conductive porous functional film, each conductive porous functional film is electrically connected with the high-frequency alternating current power supply, high-frequency alternating current is applied to the conductive porous functional film through the high-frequency alternating current power supply so that the concentrated water can self-generate heat and generate water vapor, and the water vapor can enter the fresh water channel through the conductive porous functional film to obtain fresh water.
2. The membrane separation device of claim 1, wherein each of the electrically conductive porous functional membranes comprises a porous hydrophobic substrate and a porous electrically conductive layer composited with the porous hydrophobic substrate, the porous hydrophobic substrate being positioned on the fresh water channel side, the porous electrically conductive layer being positioned on the concentrate channel side.
3. The membrane separation device of claim 2, wherein the material from which the porous hydrophobic substrate is made comprises at least one of polytetrafluoroethylene, polyvinylidene fluoride, and ceramic; and/or the material from which the porous conductive layer is made comprises at least one of a carbon-based material, a metal-based material, and a conductive polymer.
4. A membrane separation device according to claim 3, wherein the porous conductive layer is built onto the porous hydrophobic substrate by spin-coating, suction filtration, spray coating, dipping or vapour deposition processes.
5. The membrane separation device according to any one of claims 1 to 4, further comprising a housing in which a pair of the electrically conductive porous functional membranes are fixed in parallel, the housing and the electrically conductive porous functional membranes being formed between them as the fresh water passage.
6. The membrane separation device according to claim 5, wherein a first insulating barrier and a second insulating barrier for supporting the electrically conductive porous functional membrane are independently provided in the concentrate passage and the fresh water passage.
7. The membrane separation device according to any one of claims 1 to 4, wherein cold water or cooling gas is introduced into the fresh water channel or the fresh water channel is evacuated,
To effect condensation and transport of water vapor entering therein.
8. The membrane separation device according to any one of claims 1 to 4, further comprising an on-line monitoring module comprising temperature monitoring means for monitoring the temperature of the concentrate channel and/or the inlet and outlet of the fresh water channel, quality monitoring means for monitoring the quality of concentrate and/or fresh water, conductivity monitoring means for monitoring the conductivity of fresh water, and energy intensity monitoring means for monitoring the energy input intensity of the high frequency ac power supply.
9. The membrane separation device according to any one of claims 1 to 4, wherein the frequency of the high-frequency alternating current is 1 kHz or more and/or the salt ion concentration in the concentrated water is 1 g/L or more.
10. A membrane separation method, comprising:
Forming a concentrated water channel for concentrated water by adopting at least one pair of conductive porous functional films which are arranged at intervals, forming fresh water channels for fresh water on two sides of the concentrated water channel,
Applying high-frequency alternating current to the conductive porous functional film to enable the concentrated water to self-generate heat and generate water vapor, wherein the water vapor penetrates through the conductive porous functional film and enters the fresh water channel to obtain fresh water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410551098.3A CN118122141B (en) | 2024-05-07 | 2024-05-07 | Membrane separation device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410551098.3A CN118122141B (en) | 2024-05-07 | 2024-05-07 | Membrane separation device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN118122141A CN118122141A (en) | 2024-06-04 |
| CN118122141B true CN118122141B (en) | 2024-06-25 |
Family
ID=91238006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410551098.3A Active CN118122141B (en) | 2024-05-07 | 2024-05-07 | Membrane separation device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118122141B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107416947A (en) * | 2017-07-21 | 2017-12-01 | 张英华 | Graphene or CNT hotting mask saline treatment equipment and control method |
| CN110124522A (en) * | 2018-02-09 | 2019-08-16 | 厦门大学 | A kind of carbon periosteum distillating method based on from joule heating effect |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007031977A1 (en) * | 2007-07-10 | 2009-01-15 | Imris, Pavel, Dr. | Electrolyzer with capacitor electrodes in a magnetic field passage for desalination of sea water |
| CN110723769B (en) * | 2019-09-27 | 2021-06-15 | 厦门大学 | Continuous seawater desalination device and method |
| CN113233680A (en) * | 2021-05-08 | 2021-08-10 | 扬州大学 | Capacitance type membrane distillation seawater desalination device |
-
2024
- 2024-05-07 CN CN202410551098.3A patent/CN118122141B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107416947A (en) * | 2017-07-21 | 2017-12-01 | 张英华 | Graphene or CNT hotting mask saline treatment equipment and control method |
| CN110124522A (en) * | 2018-02-09 | 2019-08-16 | 厦门大学 | A kind of carbon periosteum distillating method based on from joule heating effect |
Also Published As
| Publication number | Publication date |
|---|---|
| CN118122141A (en) | 2024-06-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101337717B (en) | High efficiency energy-conserving barrier diaphragm capacitance deionization device | |
| Palakkal et al. | Low-resistant ion-exchange membranes for energy efficient membrane capacitive deionization | |
| Zhang et al. | Polymer ion-exchange membranes for capacitive deionization of aqueous media with low and high salt concentration | |
| US6462935B1 (en) | Replaceable flow-through capacitors for removing charged species from liquids | |
| TWI529010B (en) | Method for removing ionic species from desalination unit | |
| CN102249380B (en) | Efficient liquid flow type membrane capacitance desalter | |
| CN104495991B (en) | A kind of high performance membrane capacitive deionization array based on flow-type electrode | |
| CN106044967B (en) | Synchronous desalination removes the sewage water treatment method and device of organic matter | |
| Kim et al. | Parametric investigation of the desalination performance in multichannel membrane capacitive deionization (MC-MCDI) | |
| Li et al. | Electrosorptive removal of salt ions from water by membrane capacitive deionization (MCDI): characterization, adsorption equilibrium, and kinetics | |
| Lee et al. | Comparison of the property of homogeneous and heterogeneous ion exchange membranes during electrodialysis process | |
| Cao et al. | Electro-desalination: State-of-the-art and prospective | |
| Liao et al. | Applications of electrically conductive membranes in water treatment via membrane distillation: Joule heating, membrane fouling/scaling/wetting mitigation and monitoring | |
| CN109692575B (en) | Double-chamber membrane capacitance deionization device | |
| CN110124522B (en) | Carbon tube membrane distillation method based on self-joule heating effect | |
| CN118122141B (en) | Membrane separation device and method | |
| CN102718291A (en) | Ion exchange resin modified polyvinylidene fluoride (PVDF) charcoal electrode and preparation method thereof | |
| JP2002273439A (en) | Desalting method and device therefor | |
| Dehghan et al. | A brief review on operation of flow-electrode capacitive deionization cells for water desalination | |
| Shan et al. | Enhancing capacitive deionization for water desalination: the role of activated carbon in contaminant removal | |
| CN105753114B (en) | A kind of multi-chamber Electro Sorb desalting technology and device for realizing continuous desalination production water | |
| CN204400676U (en) | A kind of high performance membrane capacitor deionizing instrument based on flowing-type electrode | |
| Zhou et al. | Desalination performance of shale gas produced water by flow-electrode capacitive deionisation process | |
| Wang et al. | Study on influencing factors of capacitive deionization with Prussian blue analog/activated carbon electrode | |
| JP2002336865A (en) | Desalting apparatus and desalting method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |