CN221182321U - Electric heating membrane distillation device for water desalination - Google Patents
Electric heating membrane distillation device for water desalination Download PDFInfo
- Publication number
- CN221182321U CN221182321U CN202322727746.XU CN202322727746U CN221182321U CN 221182321 U CN221182321 U CN 221182321U CN 202322727746 U CN202322727746 U CN 202322727746U CN 221182321 U CN221182321 U CN 221182321U
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- water
- membrane
- water inlet
- water outlet
- electrically heated
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 193
- 239000012528 membrane Substances 0.000 title claims abstract description 106
- 238000004821 distillation Methods 0.000 title claims abstract description 49
- 238000010612 desalination reaction Methods 0.000 title claims abstract description 14
- 238000005485 electric heating Methods 0.000 title abstract description 12
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 42
- 239000002131 composite material Substances 0.000 claims abstract description 27
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 239000011248 coating agent Substances 0.000 claims description 16
- 238000000576 coating method Methods 0.000 claims description 16
- -1 polytetrafluoroethylene Polymers 0.000 claims description 14
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 14
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 14
- 238000003860 storage Methods 0.000 claims description 12
- 239000000498 cooling water Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 239000002041 carbon nanotube Substances 0.000 claims description 4
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims 3
- 238000000034 method Methods 0.000 description 13
- 238000005516 engineering process Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 6
- 150000003839 salts Chemical class 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 239000011780 sodium chloride Substances 0.000 description 4
- 239000000306 component Substances 0.000 description 3
- 239000012510 hollow fiber Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000036760 body temperature Effects 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The utility model relates to an electric heating membrane distillation device for water desalination, belonging to the technical field of water desalination devices, and comprising a distillation membrane component, wherein the distillation membrane component comprises an outer shell and an inner composite hydrophobic membrane, the outer shell is divided into a water inlet area and a water outlet area by the composite hydrophobic membrane, one side of the composite hydrophobic membrane, which is close to the water inlet area, is provided with a conductive side, and the conductive side is connected with a heating power supply.
Description
Technical Field
The utility model relates to the technical field of water desalination devices, in particular to an electric heating membrane distillation device for water desalination.
Background
With the continuous progress and perfection of membrane treatment technology, the technology of combining membrane distillation technology and technology is increasingly attracting attention of researchers. The membrane distillation technology (MD) is taken as a representative efficient energy-saving membrane treatment process, plays an important role in the treatment of various polluted water bodies, has remarkable competitive advantages in the fields of sustainable production of purified water, resource recycling and the like, and meets the requirements of clean production nowadays.
The treatment of salt-containing wastewater is an important problem, and salt substances in water bodies have potential harm to the environment. If the metal ions in the heavy metal wastewater cannot be removed in time, a large number of aquatic plants and animals in the water body can be killed; moreover, the saline water body cannot be directly used for drinking or irrigation, so that serious water resource waste is caused. Therefore, development of efficient water desalination technology has been eager.
In the aspect of salt-containing wastewater treatment, if the traditional membrane distillation technology is directly used, the problems of lower heat efficiency, long treatment time and the like are often caused, because the membrane distillation system has higher requirements on the temperature of the water body at the water inlet side, and in practical application, the water body at the water inlet side often passes through a longer water body transportation link and generates a great amount of heat loss in the process.
The patent publication CN 110461452A discloses a membrane distillation apparatus comprising: a membrane distillation module comprising 2 or more hydrophobic porous hollow fiber membranes; and a condenser for condensing the vapor taken out from the module, wherein the average pore diameter of the porous hollow fibers is 0.01-1 [ mu ] m, the filling rate of the porous hollow fibers of the module for membrane distillation is 10-80%, and the pressure condition of the membrane distillation is 1 kPa-1 ℃ and below the saturated vapor pressure of water at the temperature of the water to be treated. The membrane distillation device is suitable for the water body on the water inlet side in practical application, which often passes through a longer water body transportation link and generates a large amount of heat loss in the process, thus reducing the distillation efficiency and solving the technical problems which are not applied for.
Disclosure of utility model
In order to solve the technical problems, the utility model provides the electric heating membrane distillation device for water desalination, which avoids the problem of heat loss of the water in the transmission process and improves the heat efficiency of the system.
In order to achieve the above purpose, the technical scheme adopted by the utility model for solving the technical problems is as follows: the electric heating membrane distillation device for desalting the water body comprises a distillation membrane component, wherein the distillation membrane component comprises an outer shell and an inside composite hydrophobic membrane, the outer shell is divided into a water inlet area and a water outlet area by the composite hydrophobic membrane, one side of the composite hydrophobic membrane, which is close to the water inlet area, is provided with a conductive side, and the conductive side is connected with a heating power supply.
The composite hydrophobic membrane comprises a hydrophobic porous membrane, and a conductive coating is coated on the surface of one side of the hydrophobic porous membrane, which is close to the water inlet area, to form the conductive side.
The hydrophobic porous membrane is a polytetrafluoroethylene base membrane, the pore diameter of the polytetrafluoroethylene base membrane is 0.2-0.25um, and the thickness of the polytetrafluoroethylene base membrane is 0.2-0.3mm.
The conductive coating is a carbon nano tube coating, and the thickness of the conductive coating is 30-50um.
The water inlet area is connected with the water inlet assembly, and the water outlet area is connected with the cooling water outlet assembly.
The water inlet assembly comprises a water storage tank and a water inlet side water pump which are sequentially connected with the water inlet area along the water inlet direction through a pipeline.
The cooling water outlet assembly comprises a collecting tank, a water outlet side water pump and a condenser which are sequentially connected with the water outlet area along the water outlet direction through pipelines.
The heating power supply is set as an alternating current power supply for providing 15-25V alternating current voltage.
The beneficial effects of the utility model are as follows:
1. The utility model combines the electric heating method and the membrane distillation method, and can effectively reduce the negative influence of a water outlet area (cold water side) on the temperature of the water inlet body by directly heating the conductive side of the composite hydrophobic membrane, simultaneously solve the problem of heat loss of the water body in the transportation process, which occurs in the traditional membrane distillation technology, and improve the energy utilization efficiency of the system.
2. According to the utility model, the conductive coating is coated on the surface of one side of the hydrophobic porous membrane, which is close to the water inlet region, so that the original functions of the polytetrafluoroethylene base membrane are maintained, and meanwhile, the conductive performance of the composite hydrophobic membrane is greatly improved, so that alternating current voltage can generate current on the surface of the membrane and cause a thermal effect, the solution in the water inlet region near the conductive side is heated, the temperature difference is formed between the water inlet region and the water outlet region, the vapor pressure difference is generated at the two sides of the composite hydrophobic membrane, and the water inlet solution near the membrane surface is compressed into vapor and enters the water outlet region through the composite hydrophobic membrane, so that the efficient separation of salt substances and pure water can be realized.
Drawings
The contents of the drawings and the marks in the drawings of the present specification are briefly described as follows:
FIG. 1 is a schematic diagram of an electrically heated membrane distillation apparatus for water desalination according to the present utility model;
The labels in the above figures are: 1. the distillation device comprises a distillation membrane assembly 11, an outer shell 12, a composite hydrophobic membrane 121, a hydrophobic porous membrane 122, a conductive coating 13, a water inlet area 14, a water outlet area 2, a heating power supply 3, a water storage tank 4, a water inlet side water pump 5, a water outlet side water pump 6, a condenser 7 and a collecting tank.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model, and the following embodiments are used to illustrate the present utility model, but are not intended to limit the scope of the present utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The specific embodiments of the present utility model are as follows: as shown in fig. 1, the utility model provides an electric heating membrane distillation device for water body desalination, which comprises a distillation membrane assembly 1, wherein the distillation membrane assembly 1 comprises an outer shell 11 and an inner composite hydrophobic membrane 12, the outer shell 11 is divided into a water inlet area 13 and a water outlet area 14 by the composite hydrophobic membrane 12, one side of the composite hydrophobic membrane 12, which is close to the water inlet area 13, is provided with a conductive side, and the conductive side is connected with a heating power supply 2. The utility model combines the electric heating method and the membrane distillation method, and can effectively reduce the negative influence of the water outlet area 14 (cold water side) on the temperature of the water body of the water inlet by directly heating the conductive side of the composite hydrophobic membrane 12, simultaneously solve the problem of heat loss of the water body in the transportation process, which occurs in the traditional membrane distillation technology, and improve the energy utilization efficiency of the system.
Specifically, the composite hydrophobic membrane 12 includes a hydrophobic porous membrane 121, and a conductive coating 122 is coated on a surface of one side of the hydrophobic porous membrane 121, which is close to the water inlet region 13, to form a conductive side. The hydrophobic porous membrane 121 is set as a polytetrafluoroethylene base membrane, the pore diameter of the polytetrafluoroethylene base membrane is 0.2-0.25um, the thickness of the polytetrafluoroethylene base membrane is 0.2-0.3mm, the polytetrafluoroethylene base membrane has strong hydrophobicity, is a core component of the device, can ensure that the solution and solute in the water inlet area 13 cannot permeate, and the water vapor passing through the membrane distillation process can permeate the polytetrafluoroethylene base membrane from the water inlet area 13 to enter the water outlet area 14, thereby realizing the water desalination process. The conductive coating 122 is a carbon nanotube coating, and because the polytetrafluoroethylene substrate film has poor conductivity, a layer of carbon nanotube coating is coated on the surface of the polytetrafluoroethylene substrate film, so that the conductivity of the composite hydrophobic film 12 is improved, the electric heating requirement can be met, and the thickness of the conductive coating 122 is 30-50um, so that the composite hydrophobic film can normally operate in the voltage range of 15-25V.
Specifically, the water inlet area 13 is connected with the water inlet assembly, and the water outlet area 14 is connected with the cooling water outlet assembly. The water inlet assembly comprises a water storage tank 3 and a water inlet side water pump 4 which are sequentially connected with the water inlet area 13 along the water inlet direction through a pipeline, the water storage tank 3 is used for storing and transporting the water to be treated, and the water in the water storage tank 3 can circularly flow between the water inlet area 13 and the water storage tank 3 under the action of the water inlet side water pump 4 so as to carry out circular distillation.
The cooling water outlet assembly comprises a collecting tank 7, a water outlet side water pump 5 and a condenser 6 which are sequentially connected with the water outlet area 14 along the water outlet direction through pipelines, wherein the condenser 6 can maintain the water body temperature of the water outlet area 14, so that the water body temperature of the water outlet area 14 is maintained within the range of 10-20 ℃ to ensure that enough temperature gradients are arranged on two sides of a membrane surface for membrane distillation operation; the collecting tank 7 is used for collecting distilled pure water, and the distilled pure water is discharged after the distilled pure water reaches a set amount; the water in the collecting tank 7 can circularly flow between the water outlet area 14 and the condenser 6 under the action of the water outlet side water pump 5 so as to carry out circular distillation.
Specifically, the heating power supply 2 is set as an ac power supply, and can provide 15-25V ac voltage to provide enough heat for the water inlet solution near the membrane surface, meanwhile, the voltage in the range does not negatively affect the composite hydrophobic membrane 12, and the heating power supply 2 is used for directly and electrically heating the composite hydrophobic membrane 12 to provide heat for the water inlet solution near the membrane surface, and meanwhile, the temperature influence of the low-temperature solution in the water outlet area 14 on the solution in the water inlet area 13 is reduced.
The using method of the electric heating membrane distillation device comprises the following steps: step 1, assembling a composite hydrophobic membrane 12 coated with a conductive coating 122 in an outer shell 11, connecting the conductive side of the composite hydrophobic membrane 12 with a heating power supply 2, sequentially connecting a water inlet area 13 of a distillation membrane assembly 1 with a water storage tank 3 and a water inlet side water pump 4 along a water inlet direction through a pipeline, and sequentially connecting a water outlet area 14 of the distillation membrane assembly 1 with a collecting tank 7, a water outlet side water pump 5 and a condenser 6 along a water outlet direction through a pipeline; step 2, adding a saline water body to be treated into the water storage tank 3, keeping the water storage tank 3 and the internal temperature thereof in a normal temperature and pressure state (20-40 ℃), keeping the water storage tank 3 in a closed state, and preventing other components from entering the water circulation without external connection other channels except the connecting pipeline; step 3, adding a little distilled water into the collecting tank 7, starting the water inlet side water pump 4, the water outlet side water pump 5 and the heating power supply 2, wherein the water inlet side water pump 4 pumps out the saline water body in the water storage container and continuously circulates the water body in the water inlet side, and the saline water body in the water inlet area 13 is heated when passing through the composite hydrophobic membrane 12, so that the temperature of the water body near the membrane surface of the water inlet area 13 rises; meanwhile, the condenser 6 maintains the water temperature of the water outlet side within the range of 10-20 ℃, the water pump 5 at the water outlet side pumps out the water in the condenser 6 and continuously circulates the water in the water outlet side, the water in the water inlet area 13 and the water in the water outlet area 14 form a temperature difference, so that the two sides of the composite hydrophobic membrane 12 generate a vapor pressure difference, and the water inlet solution near the membrane surface is compressed into vapor and enters the water outlet area 14 through the composite hydrophobic membrane 12, thereby realizing the separation of salt substances and pure water; and 4, condensing the water vapor entering the water outlet area 14, then entering the collecting tank 7 for collection, and discharging the collected distilled water to other containers or using after the collection reaches a set amount while participating in the water circulation of the water outlet area 14.
In conclusion, the utility model combines the electric heating method and the membrane distillation method, can effectively reduce the negative influence of the water outlet area on the temperature of the water body of the inlet water, solves the problem of heat loss of the water body in the transportation process caused by the traditional membrane distillation technology, and improves the energy utilization efficiency of the system.
The foregoing is provided by way of illustration of the principles of the present utility model, and is not intended to be limited to the specific constructions and applications illustrated herein, but rather to all modifications and equivalents which may be utilized as fall within the scope of the utility model as defined in the claims.
Claims (8)
1. The utility model provides an electrical heating membrane distillation plant for water desalination, its characterized in that includes distillation membrane module, distillation membrane module includes shell body and inside compound hydrophobic membrane, compound hydrophobic membrane is cut apart into water inlet region and play water zone with the shell body, compound hydrophobic membrane is close to one side of water inlet region and sets up electrically conductive side, electrically conductive side links to each other with heating power supply.
2. An electrically heated membrane distillation apparatus for desalinating water body according to claim 1, wherein: the composite hydrophobic membrane comprises a hydrophobic porous membrane, and a conductive coating is coated on the surface of one side of the hydrophobic porous membrane, which is close to the water inlet area, to form the conductive side.
3. An electrically heated membrane distillation apparatus for desalinating water body as claimed in claim 2, wherein: the hydrophobic porous membrane is a polytetrafluoroethylene base membrane, the pore diameter of the polytetrafluoroethylene base membrane is 0.2-0.25um, and the thickness of the polytetrafluoroethylene base membrane is 0.2-0.3mm.
4. An electrically heated membrane distillation apparatus for desalinating water body as claimed in claim 2, wherein: the conductive coating is a carbon nano tube coating, and the thickness of the conductive coating is 30-50um.
5. An electrically heated membrane distillation apparatus for desalinating water body according to claim 1, wherein: the water inlet area is connected with the water inlet assembly, and the water outlet area is connected with the cooling water outlet assembly.
6. An electrically heated membrane distillation apparatus for water desalination as defined in claim 5 wherein: the water inlet assembly comprises a water storage tank and a water inlet side water pump which are sequentially connected with the water inlet area along the water inlet direction through a pipeline.
7. An electrically heated membrane distillation apparatus for water desalination as defined in claim 5 wherein: the cooling water outlet assembly comprises a collecting tank, a water outlet side water pump and a condenser which are sequentially connected with the water outlet area along the water outlet direction through pipelines.
8. An electrically heated membrane distillation apparatus for desalinating water body according to claim 1, wherein: the heating power supply is set as an alternating current power supply for providing 15-25V alternating current voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322727746.XU CN221182321U (en) | 2023-10-11 | 2023-10-11 | Electric heating membrane distillation device for water desalination |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322727746.XU CN221182321U (en) | 2023-10-11 | 2023-10-11 | Electric heating membrane distillation device for water desalination |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221182321U true CN221182321U (en) | 2024-06-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322727746.XU Active CN221182321U (en) | 2023-10-11 | 2023-10-11 | Electric heating membrane distillation device for water desalination |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221182321U (en) |
-
2023
- 2023-10-11 CN CN202322727746.XU patent/CN221182321U/en active Active
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