CN113461245A - Solar-driven salt-containing water film distillation and purification device - Google Patents
Solar-driven salt-containing water film distillation and purification device Download PDFInfo
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- CN113461245A CN113461245A CN202110878652.5A CN202110878652A CN113461245A CN 113461245 A CN113461245 A CN 113461245A CN 202110878652 A CN202110878652 A CN 202110878652A CN 113461245 A CN113461245 A CN 113461245A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 162
- 238000004821 distillation Methods 0.000 title claims abstract description 71
- 238000000746 purification Methods 0.000 title claims abstract description 23
- 150000003839 salts Chemical class 0.000 title claims description 13
- 239000007788 liquid Substances 0.000 claims abstract description 92
- 239000012528 membrane Substances 0.000 claims abstract description 74
- 238000005338 heat storage Methods 0.000 claims abstract description 33
- 238000003860 storage Methods 0.000 claims abstract description 13
- 239000008213 purified water Substances 0.000 claims abstract description 8
- 239000002033 PVDF binder Substances 0.000 claims description 13
- 238000005516 engineering process Methods 0.000 claims description 13
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 13
- 229910052802 copper Inorganic materials 0.000 claims description 11
- 239000010949 copper Substances 0.000 claims description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 239000012267 brine Substances 0.000 claims description 5
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 5
- 239000012510 hollow fiber Substances 0.000 claims description 3
- 239000012774 insulation material Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 19
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 abstract 1
- 239000011780 sodium chloride Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 10
- 230000008929 regeneration Effects 0.000 description 5
- 238000011069 regeneration method Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000001223 reverse osmosis Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005370 electroosmosis Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000000909 electrodialysis Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/14—Treatment of water, waste water, or sewage by heating by distillation or evaporation using solar energy
-
- 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
- C02F1/447—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by membrane distillation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/005—Valves
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/009—Apparatus with independent power supply, e.g. solar cells, windpower or fuel cells
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/02—Temperature
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/06—Pressure conditions
- C02F2301/063—Underpressure, vacuum
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/10—Energy recovery
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a solar-driven saline water film distillation and purification device, which comprises a filter, a solar thermal collector and a film distillation assembly, wherein the water outlet of the filter is connected with a water pump through a water outlet pipe, the water pump is connected with the water inlet of the solar thermal collector through a water pipe, and the water outlet of the solar thermal collector is communicated with the inlet of a heat storage water tank through a thermometer and a temperature control valve through a water pipe; the outlet of the heat storage water tank is connected with the hot feed liquid inlet of the membrane distillation assembly through a hot water inlet pipe; a hot feed liquid outlet of the membrane distillation assembly is connected with an inlet of a heat storage water tank through a heat return water pipe and an electronic expansion valve; the inlet and the outlet of the cold charge liquid circulating pipe are respectively connected with the inlet and the outlet of the cold charge liquid; the purified water outlet of the membrane distillation component is connected with the water storage tank. The cold material liquid in the cold material liquid circulating pipe can be recycled. A one-way valve and an electronic expansion valve are arranged in the cold feed liquid circulating system, so that the cold feed liquid preferentially fills the membrane module, and when the content of the cold feed liquid meets the requirement of the circulating system, the cold feed liquid inlet valve is closed, so that water resources are saved.
Description
Technical Field
The invention belongs to the technical field of solar water purification, and particularly relates to a solar-driven salt-containing water film distillation purification device.
Background
The main modes adopted at present for desalting the salt-containing water are electrodialysis, reverse osmosis, multi-stage distillation and the like. The existing electroosmosis method and reverse osmosis method have large energy consumption in the environment with low water temperature and high salt content in western regions, and the highest recovery rate is only 75 percent. In addition, the development of the equipment is restricted because the equipment is large, the operation cost is increased and even more than the cost for transporting water from outside.
Currently, many researchers have combined solar heat collection technology and thermal water purification technology to realize the purification treatment of salt-containing water, thereby reducing the cost and energy consumption of the water purification technology. The technology utilizes solar energy absorbed by a solar heat collector, and then realizes the evaporation and condensation of water by a thermal distillation technology to purify water, and the device is simpler and has lower cost. However, compared with the membrane distillation technology combining the distillation method and the membrane method which is rapidly developed in recent years, the water production efficiency and the daily water yield are low because the water needs to be heated to the boiling point and the required heat is high, and the daily requirement is difficult to meet.
Disclosure of Invention
The invention aims to solve the technical problems of the prior art and provide a solar-driven salt-containing water film distillation and purification device to solve the problems of high energy consumption and low return rate of the existing electroosmosis method and reverse osmosis method and the problems of low water production efficiency and daily water yield of the traditional hot-method water purification technology in the background art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a saliferous water film distillation and purification device based on solar drive comprises a filter, a solar thermal collector and a film distillation assembly, wherein a water outlet of the filter is connected with a water pump through a water outlet pipe, the water pump is connected with a water inlet of the solar thermal collector through a water pipe, and a water outlet of the solar thermal collector is communicated with an inlet of a heat storage water tank through a thermometer and a temperature control valve through a water pipe; the outlet of the heat storage water tank is connected with the hot feed liquid inlet of the membrane distillation assembly through a hot water inlet pipe; the hot feed liquid outlet of the membrane distillation assembly is connected with the inlet of the heat storage water tank through a heat return water pipe and an electronic expansion valve; the inlet and the outlet of the cold material liquid circulating pipe are respectively connected with the inlet and the outlet of the cold material liquid of the membrane distillation assembly; the purified water outlet of the membrane distillation assembly is connected with the water storage tank through a purified water pipe; the solar generator is connected with a storage battery pack through a charging wire for charging, and the storage battery pack is connected with a water pump, a fan and an electric heater through a power supply wire for supplying power.
According to above characteristic, the top of membrane distillation subassembly is equipped with hot feed liquid entry, the downside of hot feed liquid entry is equipped with the PVDF membrane, the symmetric position department of PVDF membrane is equipped with the distillate, the below of PVDF membrane is equipped with cold feed liquid export, the symmetric position department of cold feed liquid export is equipped with cold feed liquid entry, the centre of cold feed liquid export and cold feed liquid entry is equipped with the copper pipe, the bottom of distillate is equipped with hot feed liquid export.
In some embodiments, the filter is a multi-layer activated carbon filter.
According to the above features, the heat storage water tank adopts an interlayer structure, and a heat insulating material is filled between the spiral heat exchange tube and the shell.
According to the characteristics, the membrane distillation component adopts an air gap type membrane distillation technology and a vacuum type membrane distillation technology at the same time, and adopts a hollow fiber heat exchange tube structure.
According to the characteristics, the outer side of the copper pipe is wrapped with the PVDF film, and the inner side of the copper pipe is provided with an air gap.
Compared with the prior art, the invention has the beneficial effects that:
1) the energy source required by the invention is single clean energy, namely solar energy. China has abundant solar energy reserves, has huge solar energy, is a typical renewable resource and does not discharge any polluted gas and harmful substances.
2) The invention adopts two membrane distillation modes for coupling. The membrane distillation component overcomes the problems of difficult cleaning, overlarge pressure drop and unstable air gap of the traditional membrane component, and has the advantages of high thermal efficiency and high flux.
3) The heat storage water tank disclosed by the invention adopts two coupling modes and has a heat regeneration function design. The backflow heat storage effect of the heat storage water tank is better, the temperature of hot feed liquid can be guaranteed to meet the temperature requirement of membrane distillation all the time, and the continuous cyclic utilization of waste heat in the backflow hot feed liquid is guaranteed.
4) The cold material liquid in the cold material liquid circulating pipe can be recycled. A one-way valve and an electronic expansion valve are arranged in the cold feed liquid circulating system, so that the cold feed liquid preferentially fills the membrane module, and when the content of the cold feed liquid meets the requirement of the circulating system, the cold feed liquid inlet valve is closed, so that water resources are saved.
Drawings
FIG. 1 is a schematic structural diagram of a solar-driven brine membrane distillation purification device.
FIG. 2 is a schematic view of the membrane distillation module according to the present invention.
FIG. 3 is a schematic cross-sectional view of a membrane distillation module according to the present invention.
Fig. 4 is a schematic view of the reservoir of the present invention.
Wherein: 1-a heat storage water tank; 2-a membrane distillation assembly; 3-a solar heat collector; 4-a water pump; 5-a filter; 6, a fan; 7-a battery pack; 8-a solar generator; 9-cold feed liquid circulating pipe; 10-an electric heater; 11-a water storage tank; 12-a salt-containing water inlet pipe; 13-a water pipe; 14-a water pipe; 15-copper tube; 16-a regenerative water pipe; 17-hot water inlet pipe; 18-a thermostatic valve; 19-a water pipe; 20-thermometer; 21-a water purifying pipe; 22-a charging wire; 23-a supply line; 24-air gap; 25-hot feed liquid inlet; 26-PVDF membrane; 27-cold feed liquid outlet; 28-copper tubing; 29-cold feed liquid inlet; 30-hot feed liquid outlet; 31-distillate; 32-effective length of membrane distillation.
Detailed Description
Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While embodiments of the invention are illustrated in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Those skilled in the art will recognize that alternative embodiments may be made from the following description without departing from the spirit and scope of the invention.
Firstly, a salt-containing water film distillation and purification device based on solar drive comprises a filter 5, a solar thermal collector 3 and a film distillation component 2, and is characterized in that a water outlet of the filter 5 is connected with a water pump 4 through a water outlet pipe 13, the water pump 4 is connected with a water inlet of the solar thermal collector 3 through a water pipe 1419, and a water outlet of the solar thermal collector 3 is communicated with an inlet of a heat storage water tank 1 through a thermometer and a temperature control valve through a water pipe 1419; the outlet of the heat storage water tank 1 is connected with the hot feed liquid inlet 25 of the membrane distillation assembly 2 through a hot water inlet pipe 141719; the hot feed liquid outlet 30 of the membrane distillation assembly 2 is connected with the inlet of the heat storage water tank 1 through an electronic expansion valve by a heat return water pipe 16; the inlet and the outlet of the cold feed liquid circulating pipe 9 are respectively connected with the inlet and the outlet of the cold feed liquid of the membrane distillation component 2; the purified water outlet of the membrane distillation module 2 is connected with a water storage tank through a purified water pipe 1419; the solar generator 8 is connected with the storage battery pack 7 through a charging wire 22 for charging, and the storage battery pack 7 is connected with the water pump 4, the fan and the electric heater through a power supply wire 23 for supplying power.
Secondly, according to the above characteristics, the top of the membrane distillation component 2 is provided with a hot material liquid inlet 25, the lower side of the hot material liquid inlet 25 is provided with a PVDF membrane, the symmetric position of the PVDF membrane is provided with a distillate 31, a cold material liquid outlet 27 is arranged below the PVDF membrane, the symmetric position of the cold material liquid outlet 27 is provided with a cold material liquid inlet 29, the middle of the cold material liquid outlet 27 and the cold material liquid inlet 29 is provided with a copper pipe 1528, and the bottom of the distillate 31 is provided with a hot material liquid outlet 30.
In some embodiments, the filter 5 is a multi-layer activated carbon filter 5. According to the characteristics, the heat storage water tank 1 adopts an interlayer structure, and heat insulation materials are filled between the spiral heat exchange tubes and the shell.
In some embodiments, the membrane distillation module 2 employs both air-gap membrane distillation technology and vacuum membrane distillation technology, and employs a hollow fiber heat exchange tube structure. According to the above features, the outer side of the copper pipe 1528 is wrapped with a PVDF film, and the inner side of the copper pipe 1528 is provided with an air gap 24.
The operation principle of the solar-driven salt-containing water film distillation purification device is as follows:
the device mainly treats salt-containing water, water is conveyed into the solar heater through the filter and the water pump, then hot water in the solar heater is conveyed to the heat storage water tank, then the hot water enters the membrane distillation system for purification treatment, the treated distilled water is conveyed to the water storage tank, and untreated hot water continuously returns to the heat storage water tank for circulation.
In the device, salt-containing water is filtered by a filter and is conveyed to a solar heat collector by a water pump, and two valves, namely a gate valve and a check valve, are arranged at the front and the rear of the water pump respectively and are mainly used for ensuring the safe operation of the water pump; the solar energy is heated by the solar heat collector and is sent to the heat collecting water tank, the heat collecting water tank mainly plays roles of heat preservation and heating, and a heater in the heat collecting water tank heats water in the water tank under the condition of no solar energy; then the cold feed liquid enters a membrane distillation system, a one-way valve and an electronic expansion valve are arranged in a cold feed liquid circulating system, so that the membrane module is filled with the cold feed liquid preferentially, when the content of the cold feed liquid meets the requirement of the circulating system, a cold feed liquid inlet valve is closed, water resources are saved, the cold feed liquid enters the membrane module to absorb latent heat of secondary steam, enters a snake-shaped radiating pipe after being heated, and is further cooled under the action of a fan, the fan is powered by a solar photovoltaic panel, and the generated low-temperature cold feed liquid enters the membrane distillation module for recycling; finally, the pure water after the membrane distillation treatment is remained in the water tank, and the untreated hot water is remained in the heat collecting water tank for continuous circulation.
The water primarily filtered flows into a solar heat collector for heating, when the temperature measured by a thermometer is heated to 60 ℃ required for membrane distillation, a temperature control valve is opened and flows into a heat storage water tank, the thermometer is arranged in the heat storage water tank, if the temperature is lower than 60 ℃, a temperature control switch is switched on, an electric heater is powered on, the water is heated to 60 ℃, and the water temperature in the heat storage water tank can be always maintained at 60 ℃.
Hot water is connected into a hot material liquid outlet of the membrane distillation device from a water outlet of the heat storage water tank, a membrane distillation water purification process is carried out in the membrane distillation assembly, hot material liquid with reduced temperature flows into the heat storage water tank through a heat regeneration water pipe after the process, and heat regeneration recycling of the hot material liquid is realized.
Purified water obtained by membrane distillation purification flows into a water storage tank through a water outlet and is stored. The whole device is powered by the solar photovoltaic device for the water pump and the fan.
The hot feed liquid is connected into a hot feed liquid outlet of the membrane distillation device from a water outlet of the heat storage water tank, the membrane distillation water purification process is carried out in the membrane distillation assembly, the hot feed liquid with reduced temperature flows into the heat storage water tank from a heat regeneration water pipe after the process, and the heat storage water tank is heated and insulated to realize heat regeneration and reutilization of the hot feed liquid.
In order to realize the regenerative recycling of hot feed liquid, the heat storage water tank adopts a sandwich structure, and as shown in the figure, heat insulation materials are filled between the spiral heat exchange tubes and the shell, so that the hot feed liquid and the backflow hot feed liquid are insulated from the external environment, and the heat loss is reduced; meanwhile, the hot material liquid spiral pipe is arranged in a surrounding mode, so that the heat exchange area of the hot material liquid and the heat storage water tank is enlarged, and the heating and heat preservation effects are achieved. The two modes are coupled, the backflow heat storage effect of the heat storage water tank is better, the temperature of hot feed liquid can be guaranteed to meet the temperature requirement of membrane distillation all the time, and the waste heat in the backflow hot feed liquid can be continuously recycled.
The upper end and the lower end of the effective length of the membrane distillation component are respectively provided with a cold feed liquid outlet and an inlet, and room-temperature tap water enters from the cold feed liquid inlet, is filled in the membrane component, and flows out from the cold feed liquid outlet at the upper end after absorbing latent heat of secondary steam. The cold feed liquid circulating system is provided with the one-way valve and the electronic expansion valve, so that the cold feed liquid is preferentially filled in the membrane module, when the content of the cold feed liquid meets the requirement of the circulating system, the cold feed liquid inlet valve is closed, water resources are saved, the cold feed liquid enters the membrane module to absorb latent heat of secondary steam, the cold feed liquid enters the snake-shaped radiating pipe after being heated, the cold feed liquid is further cooled under the action of the fan, the fan is powered by the solar photovoltaic panel, the generated low-temperature cold feed liquid enters the membrane distillation module for recycling, the cold feed liquid does not need to be added in the whole water purifying process, and the water resources are saved.
The above description is only for the specific embodiments of the present disclosure, but the scope of the embodiments of the present disclosure is not limited thereto, and any person skilled in the art can easily conceive of the changes, substitutions or combinations within the technical scope of the embodiments of the present disclosure or under the concept of the embodiments of the present disclosure, and all of them should be covered by the scope of the embodiments of the present disclosure.
Claims (5)
1. A solar-driven salt-containing water film distillation and purification device comprises a filter (5), a solar thermal collector (3) and a film distillation assembly (2), and is characterized in that a water outlet of the filter (5) is connected with a water pump (4) through a water outlet pipe (13), the water pump (4) is connected with a water inlet of the solar thermal collector (3) through a water pipe (14), and a water outlet of the solar thermal collector (3) is communicated with an inlet of a heat storage water tank (1) through a thermometer (20) and a temperature control valve (18) through a water pipe (19); the outlet of the heat storage water tank (1) is connected with the hot feed liquid inlet of the membrane distillation assembly (2) through a hot water inlet pipe (17); the hot feed liquid outlet of the membrane distillation assembly (2) is connected with the inlet of the heat storage water tank (1) through an electronic expansion valve (24) through a heat return water pipe (16); the inlet and the outlet of the cold feed liquid circulating pipe (9) are respectively connected with the inlet and the outlet of the cold feed liquid of the membrane distillation component (2); the purified water outlet of the membrane distillation component (2) is connected with a water storage tank (11) through a purified water pipe (21); the solar generator (8) is connected with the storage battery pack (7) through a charging wire (22) for charging, and the storage battery pack (7) is connected with the water pump (4), the fan (6) and the electric heater (10) through a power supply wire (23) for supplying power.
2. The solar-driven brine membrane distillation purification device according to claim 1, wherein a hot feed liquid inlet (25) is formed in the top of the membrane distillation assembly (2), a PVDF membrane (26) is arranged on the lower side of the hot feed liquid inlet (25), distillate (31) is arranged at the symmetrical position of the PVDF membrane (26), a cold feed liquid outlet (27) is formed in the lower portion of the PVDF membrane (26), a cold feed liquid inlet (29) is formed at the symmetrical position of the cold feed liquid outlet (27), a copper tube (28) is arranged between the cold feed liquid outlet (27) and the cold feed liquid inlet (29), and a hot feed liquid outlet (30) is formed in the bottom of the distillate (31).
3. The solar-driven brine-containing water membrane distillation and purification device based on the claim 1 is characterized in that the heat storage water tank (1) adopts a sandwich structure, and heat insulation materials are filled between the spiral heat exchange tubes and the shell.
4. The solar-driven brine-containing water membrane distillation purification device according to claim 1, wherein the membrane distillation component (2) adopts both air gap type membrane distillation technology and vacuum type membrane distillation technology, and adopts a hollow fiber heat exchange tube structure.
5. The solar-driven brine-containing water membrane distillation and purification device according to claim 1, wherein the outer side of the copper pipe (15) is wrapped with a PVDF film (26), and the inner side of the copper pipe (15) is provided with an air gap (24).
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| CN202110878652.5A CN113461245A (en) | 2021-08-02 | 2021-08-02 | Solar-driven salt-containing water film distillation and purification device |
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