CN211111436U - Flat ceramic membrane water purifier - Google Patents
Flat ceramic membrane water purifier Download PDFInfo
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- CN211111436U CN211111436U CN201921762965.9U CN201921762965U CN211111436U CN 211111436 U CN211111436 U CN 211111436U CN 201921762965 U CN201921762965 U CN 201921762965U CN 211111436 U CN211111436 U CN 211111436U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 144
- 239000012528 membrane Substances 0.000 title claims abstract description 119
- 239000000919 ceramic Substances 0.000 title claims abstract description 76
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- 238000000746 purification Methods 0.000 abstract description 10
- 239000000126 substance Substances 0.000 abstract description 9
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 abstract description 8
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- 238000000034 method Methods 0.000 description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 6
- 230000008569 process Effects 0.000 description 6
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- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
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- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 2
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 2
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- 238000005265 energy consumption Methods 0.000 description 1
- 210000002615 epidermis Anatomy 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- DNHVXYDGZKWYNU-UHFFFAOYSA-N lead;hydrate Chemical compound O.[Pb] DNHVXYDGZKWYNU-UHFFFAOYSA-N 0.000 description 1
- 238000009285 membrane fouling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
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- 210000004243 sweat Anatomy 0.000 description 1
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- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
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- Separation Using Semi-Permeable Membranes (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The utility model relates to an inorganic ceramic membrane material water purification technical field specifically is a dull and stereotyped ceramic membrane water purifier. The utility model discloses a dull and stereotyped ceramic membrane, membrane collector pipe wherein install inlet channel solenoid valve and pipeline mixer on dull and stereotyped ceramic membrane's the inlet channel, install the negative pressure suction pump on dull and stereotyped ceramic membrane's outlet channel, install row's dense pipeline solenoid valve on dense water discharge pipeline, inlet channel solenoid valve, pipeline mixer, negative pressure suction pump and row's dense pipeline solenoid valve are by automated control system connection control. The utility model has the advantages that full automated control, easy operation, unmanned on duty, but long-range big data monitoring, meshing operation, play water quality are good, need not to add chlorine-containing disinfectant, do not have the trihalo of carcinogenesis teratogenicity and mutagenesis and replace alkane accessory substance and produce, do not need the back flush pump, need not establish the clean water basin, reduce the area of equipment, the using water wisely resource, do not cause environmental pollution.
Description
Technical Field
The patent of the utility model relates to a water purification unit technical field, in particular to inorganic ceramic membrane material water purification technical field specifically is a dull and stereotyped ceramic membrane water purifier.
Background
Swimming is a comprehensive body-building exercise and is favored by people. When swimming, the human skin is directly contacted with the water in the swimming pool, so the quality of the water quality of the swimming pool directly influences the health of swimming people. During the swimming pool process, a large amount of pollutants such as secretions, sweat and hair on the epidermis of a human body can be dispersed in water. The pollutants contain a large amount of bacteria and various pathogenic bacteria, which can cause serious harm to cross infection of swimmers, so that the swimming pool water needs to be filtered and disinfected timely.
At present, a multi-medium sand pressure filter is generally adopted by a domestic and foreign swimming pool water circulation purification system, wherein the sand filter tank is the most commonly used one. The filter mainly has the following problems in the operation process: the adsorption capacity of the filter material is limited, and particularly after the filter material adsorbs greasy substances secreted by a human body, the effect of adsorbing suspended matter particles is lost quickly, and the filter material cannot be regenerated, so that the filtering function of part of the filter material is lost; the filter material exceeding the service life is abraded and thinned under the impact of water flow, so that the secondary pollution of the water in the swimming pool is caused; the filter material intercepts various impurities and adsorbs various suspended substances and oily substances, and is easy to agglomerate, and the filter material can be lost during backflushing, so that the filtering function is lost; the particle size of the filter material is distributed in the micron and millimeter level, so that the filter material can only intercept macroscopic large particles such as hair, cortex metabolites and the like, can not intercept bacteria, and can not ensure that the water after circulating purification achieves the sterile effect; finally, the multi-medium sandstone filter needs frequent back washing, the back washing time is long, the water quantity requirement is large, and a large amount of water resource waste and secondary environmental pollution are caused by the back-washed water.
The sand filtration tank cannot effectively intercept pathogenic microorganisms such as bacteria due to large aperture, and needs to be disinfected by adding chlorine-containing chemical agents. The residual chlorine content of the swimming pool water of the disinfection process is high, which can cause skin itch; the strong hypochlorous acid smell is dispersed in the indoor swimming pool space, so that the symptoms of dyspnea, dizziness, sore throat and the like are caused.
Disclosure of Invention
The utility model discloses a purpose is to the sand filter tank that swimming pool water circulation clean system adopted filters and contains technology such as chlorine chemicals disinfection, and the filter fineness that exists is low, the back flush is frequent, the back flush water volume is big, the back flush water causes secondary pollution, needs a large amount of chlorine chemicals disinfection, skin itch and a series of problems such as chlorine chemicals smell is bad when swimming. The water purifier has the advantages of high automation degree, integration of turbidity removal and sterilization, no need of back washing, high filtering precision, large water outlet flux, small occupied area and simple operation, and can meet the requirements of various swimming pools and SPA places.
The problem that this practicality was solved is: the existing swimming pool water circulation purification system adopts a sand filter tank filtering process, and the process has low filtering precision and poor effluent quality; the water consumption for back washing is large, which causes the problems of water resource waste, secondary environmental pollution and the like, and provides a filtering system integrating ozone, flat ceramic membrane at ultrafiltration level and ultrasonic wave. The ozone pre-oxidation effect inactivates bacteria in the swimming pool water, and can effectively relieve the membrane fouling and blocking problem; the ultrafiltration membrane has high filtration precision, good effluent quality and low turbidity, and can intercept pathogenic bacteria such as various bacteria and the like; the flat plate type membrane adopts a negative pressure suction filtration mode, so that the energy consumption is low, the effective utilization rate of the membrane is high, and the loading density of the membrane is high; the ceramic film has high mechanical strength, acid and alkali resistance, high temperature resistance, microbial corrosion resistance, good hydrophilicity, good pollution resistance and long service life; the ultrasonic wave can efficiently clean the filter cake layer adhered to the surface of the membrane in a short time, and the membrane does not need back washing, wastes no water resource and produces no secondary pollution. Most importantly, the effluent quality of the system reaches the aseptic level, chlorine-containing chemicals are not required to be added for sterilization and disinfection, and poor body feeling and uncomfortable smell cannot be caused to swimming people.
In order to solve the technical problems in the swimming pool water circulation purification system, the technical scheme of the invention is as follows:
a flat ceramic membrane water purifier comprising: dull and stereotyped ceramic membrane, membrane collector pipe, its characterized in that: the water inlet pipeline of the flat ceramic membrane is provided with a water inlet pipeline electromagnetic valve and a pipeline mixer, the water outlet pipeline of the flat ceramic membrane is provided with a negative pressure suction pump, the concentrated water discharge pipeline is provided with a concentrated water discharge pipeline electromagnetic valve, and the water inlet pipeline electromagnetic valve, the pipeline mixer, the negative pressure suction pump and the concentrated water discharge pipeline electromagnetic valve are all connected and controlled by an automatic control system.
Preferably, an ozone generator is further installed in front of the pipeline mixer on the water inlet pipeline of the flat ceramic membrane water purifier, the adding amount of ozone generated by the ozone generator is 1 mg/L-1 g/L, the ozone amount is selected according to the difference of the number of bacterial colonies in the water quality of the inlet water, and the general ozone concentration range is 1-100 mg/L.
Preferably, the electromagnetic flow meter and the water production pipeline electromagnetic valve are sequentially arranged behind the negative pressure suction pump arranged on the water outlet pipeline of the flat ceramic membrane water purifier.
Preferably, the water purifier in the flat ceramic membrane water purifier comprises a plurality of flat ceramic membranes, wherein the flat ceramic membranes are connected with the membrane water collecting pipes, and then the membrane water collecting pipes are connected with the water outlet pipeline.
Preferably, in the above-mentioned flat ceramic membrane water purifier, an ultrasonic transducer is attached to a lower surface of the flat ceramic membrane, and the ultrasonic transducer is automatically controlled by an ultrasonic controller. The ultrasonic cleaning operation is based on the fact that when the actual water production flux value detected by the electromagnetic flowmeter is lower than 50% -30% of the designed water production flux value of the system, the flat ceramic membrane is judged to need to be subjected to ultrasonic cleaning treatment. The ultrasonic cleaning frequency is 25-80 KHz, and the ultrasonic cleaning time is 0.5-120 min.
Preferably, the pore size distribution range of the flat ceramic membrane in the flat ceramic membrane water purifier is 0.01-0.5 μm.
Preferably, the flat ceramic membrane of the flat ceramic membrane water purifier comprises a support, a transition layer and a membrane layer. The flat ceramic membrane support, the transition layer and the membrane layer are made of one or more composite materials of alumina, zirconia, titania, silica, silicon carbide, cordierite, mullite and porcelain powder.
When the discharge of concentrated pollutants in the membrane pool is determined according to whether the actual water production flux of the membrane after ultrasonic cleaning is 50% -30% lower than the design value of the water production flux of the system, the concentrated solution is judged to need to be discharged and treated.
In the present application, the purification process is as follows:
step one, ozone pre-oxidation: the water inlet pipeline electromagnetic valve and the ozone generator are opened, the water to be purified in the swimming pool is mixed with ozone in the pipeline mixer, and the ozone carries out contact preoxidation sterilization and disinfection treatment on the water in the swimming pool;
step two, filtering by a flat ceramic membrane: the swimming pool water after ozone disinfection is filtered through a flat ceramic membrane under the action of vacuum suction force generated by a negative pressure suction pump, and purified water after disinfection and filtration is gathered into a membrane water collecting pipe and is discharged into a swimming pool from a water production pipe port for reuse through driving force generated by the negative pressure suction pump; meanwhile, the hair, cortex metabolites, bacteria and bacterial secretion in the swimming pool are intercepted by the flat ceramic membrane and are continuously concentrated in the membrane pool;
step three, ultrasonic cleaning: with the extension of the filtering time, the pollutants intercepted by the flat ceramic membrane are gradually increased and accumulated on the surface of the membrane, when the actual water production flux value detected by the electromagnetic flowmeter is lower than 70-30% of the designed value of the water production flux of the system, the water inlet pipeline electromagnetic valve, the negative pressure suction pump and the water production pipeline electromagnetic valve are closed, the ultrasonic controller is opened, the pollutants on the surface of the flat ceramic membrane are subjected to ultrasonic cleaning, and after the set ultrasonic cleaning time is finished, the system is restarted according to the first step to perform ozone sterilization and membrane filtering treatment;
step four, pollutant discharge: after ultrasonic cleaning, when the actual water flux of the flat ceramic membrane is still 70% -30% lower than the designed value of the water flux of the system, the concentration of the pollutants enriched in the membrane pool is very high, the concentration polarization pollution reaches the irreversible recovery condition, the normal operation of the flat ceramic membrane filtering system is seriously hindered, a water inlet pipeline electromagnetic valve, an ozone generator and a negative pressure suction pump are closed, a concentration discharge pipeline electromagnetic valve is opened, the concentrated pollutant wastewater in the membrane pool is collected and discharged, and after the pollutant wastewater discharge is detected by a liquid level sensor, the system performs purification treatment on the water in the swimming pool according to the one-step to one-step repeated cycle operation.
The utility model discloses a technical scheme has following beneficial effect of dull and stereotyped ceramic membrane water purifier:
1. the utility model discloses a material inorganic ceramics of dull and stereotyped ceramic membrane supporter, transition layer and rete, like one or more combined material in aluminium oxide, zirconia, titanium oxide, silica, carborundum, cordierite, mullite, the porcelain powder, hydrogen bond effect can take place with the hydrone for these materials, hydrophilicity is good very much, therefore dull and stereotyped ceramic membrane has fine antipollution.
2. The utility model discloses an ozone participate in water purification filtration system's purpose disinfect the disinfection, get rid of the stink of aquatic, high-efficient degradation emerging micro pollutant endocrine interferent (EDCs) and medicine and personal care products (PPcPs), alleviate membrane pollution pressure, extension membrane operating duration reduces ultrasonic cleaning frequency, improves membrane filtration efficiency and membrane life.
3. The utility model discloses a what membrane pollution treatment method adopted is the ultrasonic cleaning technique, and the cleaning performance is good, does not need the back flush pump, does not need to establish the clean water basin, reduces the area of equipment, does not cause the secondary pollution that a large amount of emission of back flush water lead to.
4. The membrane element of the utility model adopts an inorganic flat ceramic membrane, and has the advantages of large permeation flux, high mechanical strength, acid and alkali resistance, high temperature resistance, microbial corrosion resistance and good aperture concentration; the most important characteristic is that the ozone oxidation is resistant, the ozone oxidation technology can be integrated, the catalyst can be loaded to catalyze ozone to form an ozone nano reactor, hydroxyl free radicals can be generated on the surface of the membrane and in the pore channels of the membrane, pollutants are not selectively degraded, and the removal rate and the inactivation rate of pathogenic microorganisms are improved.
5. The utility model discloses a dull and stereotyped ceramic membrane swimming pool water purifier full automated control, easy operation, unmanned on duty, can long-range big data monitoring, meshing operation, area are little, go out water quality of water good, go out water quality of water and reach aseptic level, need not to add chlorine-containing disinfectant, do not have the trihalo and take the place of alkane accessory substance production that has carcinogenesis and teratogenesis and cause sudden change.
Drawings
FIG. 1 is a schematic structural view of a flat ceramic membrane water purifier.
Description of reference numerals: a water inlet pipeline electromagnetic valve 1, an ozone generator 2, a pipeline mixer 3, a negative pressure suction pump 4, a flat ceramic membrane 5, a membrane water collecting pipe 6, an electromagnetic flowmeter 7, an ultrasonic controller 8, an ultrasonic vibrator 9, an automatic control system 10, a concentrated discharge pipeline electromagnetic valve 11, a liquid level sensor 12, a water production pipeline electromagnetic valve 13
The specific implementation mode is as follows:
the following examples are further illustrative of the present invention, but are not intended to limit the scope of the present invention.
Example 1
As shown in fig. 1, a flat ceramic membrane water purifier was manufactured, including: the system comprises a flat ceramic membrane 5 and a membrane water collecting pipe 6, wherein a water inlet pipeline electromagnetic valve 1 and a pipeline mixer 3 are installed on a water inlet pipeline of the flat ceramic membrane 5, a negative pressure suction pump 4 is installed on a water outlet pipeline of the flat ceramic membrane, a concentrated water discharge pipeline electromagnetic valve 11 is installed on a concentrated water discharge pipeline, and the water inlet pipeline electromagnetic valve 1, the pipeline mixer 3, the negative pressure suction pump 4 and the concentrated water discharge pipeline electromagnetic valve 11 are all connected and controlled by an automatic control system 10. An ozone generator 2 is also arranged in front of the pipeline mixer 3 on the water inlet pipeline; the back of the negative pressure suction pump 4 arranged on the water outlet pipeline is sequentially provided with an electromagnetic flow meter 7 and a water production pipeline electromagnetic valve 13; the water purifier comprises a plurality of flat ceramic membranes 5 which are connected with a membrane water collecting pipe 6, and then the membrane water collecting pipe 6 is connected with a water outlet pipeline; an ultrasonic vibrator 9 is arranged below the flat ceramic membrane 5, and the ultrasonic vibrator 9 is automatically controlled by an ultrasonic controller 8; the pore size distribution range of the flat ceramic membrane 5 is 0.01-0.5 mu m.
The water inlet pipeline electromagnetic valve 1 and the ozone generator 2 are opened, the circulating water of the swimming pool and the ozone are mixed in the pipeline mixer 3, and the ozone carries out contact preoxidation sterilization disinfection treatment on the water of the swimming pool; the swimming pool water after ozone disinfection permeates through the flat ceramic membrane 5 to carry out filtration treatment under the vacuum suction effect that negative pressure suction pump 4 produced, and the purified water after disinfection and filtration is gathered in membrane collector pipe 6, discharges from producing water pipe mouth through the drive power that negative pressure suction pump 4 produced and recycles in the swimming pool, carries out product flux, turbidity and bacterial colony total number to the water of flat ceramic membrane swimming pool water purifier output and detects.
Example 2
As the equipment in example 1, the flat ceramic membrane swimming pool water purifier is used in the ozone sterilization and disinfection and membrane filtration processes, the hair, cortex metabolites, bacteria and bacteria secretion in the swimming pool are intercepted by the flat ceramic membrane 5 and are continuously concentrated in the membrane pool; along with the extension of the filtering time, the pollutants intercepted by the flat ceramic membrane 5 are gradually increased and accumulated on the membrane surface, when the actual water production flux value detected by the electromagnetic flowmeter 7 is lower than 50% of the designed value of the water production flux of the system, the water inlet pipeline electromagnetic valve 1, the negative pressure suction pump 4 and the water production pipeline electromagnetic valve 13 are closed, the ultrasonic controller 8 is opened, the pollutants on the surface of the flat ceramic membrane 5 are subjected to ultrasonic cleaning, and after the ultrasonic cleaning is carried out for 5 minutes, the system is restarted according to the first embodiment to carry out ozone sterilization and membrane filtering treatment.
Example 3
After the device in the embodiment 1 is cleaned by ultrasonic waves, when the actual water flux of the flat ceramic membrane is still lower than 50% of the designed value of the water flux of the system, the concentration of the pollutants enriched in the membrane pool is very high, the concentration polarization pollution reaches the irreversible recovery condition, the normal operation of the flat ceramic membrane 5 filtering system is seriously hindered, the water inlet pipeline electromagnetic valve 1, the ozone generator 2 and the negative pressure suction pump 4 are closed, the concentration discharge pipeline electromagnetic valve 11 is opened, the concentrated pollutant wastewater in the membrane pool is collected and discharged, and after the pollutant wastewater discharge is detected by the liquid level sensor 12, the system repeatedly and circularly works according to the embodiment 1 and the embodiment 2 to purify the swimming pool water.
Example 4
The swimming pool water of private people in Zhejiang is purified according to the embodiments 1 to 3, the aperture of the silicon carbide flat ceramic membrane is 0.1 mu m, and the water yield is 0.8t/m2h, ultrasonic cleaning frequency is about 1 time/2 h, membrane pool concentration ratio is 250:1, turbidity is 0.1NTU, and total number of colonies is 0.
Example 5
Purifying swimming pool water of private people in Zhejiang according to examples 1 to 3, wherein the aperture of the alumina plate ceramic membrane is 0.1 μm, and the water flux is 0.3t/m2h, ultrasonic cleaning frequency is about 1 time/2.5 h, membrane pool concentration ratio is 280:1, turbidity is 0.1NTU, and total number of colonies is 0.
Example 6
Purifying water in landscape pool of some enterprises in Zhejiang according to examples 1 to 3, wherein the aperture of the silicon carbide flat ceramic membrane is 0.1 μm, and the water yield is 0.7t/m2h, the ultrasonic cleaning frequency is about 1 time/1.5 h, the membrane pool concentration ratio is 220:1, the turbidity is 0.2NTU, and the total number of colonies is 0.
Example 7
Purifying water in landscape pool of some enterprises in Zhejiang according to examples 1 to 3, wherein the aperture of the alumina plate ceramic membrane is 0.1 μm, and the water flux is 0.25t/m2h, the ultrasonic cleaning frequency is about 1 time/1.8 h, the membrane pool concentration ratio is 240:1, the turbidity is 0.1NTU, and the total number of colonies is 0.
The above description is only for the preferred embodiments of the present invention, and the scope of the present invention can not be limited in turn, and all equivalent changes and modifications within the scope and the specification of the present invention shall fall within the scope covered by the present invention.
Claims (7)
1. A flat ceramic membrane water purifier comprising: dull and stereotyped ceramic membrane (5), membrane collector pipe (6), its characterized in that: install inlet channel solenoid valve (1) and pipeline mixer (3) on the inlet line of dull and stereotyped ceramic membrane (5), install negative pressure suction pump (4) on the outlet pipeline of dull and stereotyped ceramic membrane, install concentrated pipeline solenoid valve (11) of row on concentrated water discharge pipeline, inlet channel solenoid valve (1), pipeline mixer (3), negative pressure suction pump (4) and concentrated pipeline solenoid valve (11) of row are by automated control system (10) connection control.
2. The flat ceramic membrane water purifier according to claim 1, wherein: an ozone generator (2) is also arranged in front of the pipeline mixer (3) on the water inlet pipeline.
3. The flat ceramic membrane water purifier according to claim 1, wherein: the back of the water outlet pipeline provided with the negative pressure suction pump (4) is sequentially provided with an electromagnetic flowmeter (7) and a water production pipeline electromagnetic valve (13).
4. The flat ceramic membrane water purifier according to claim 1, wherein: the water purifier comprises a plurality of flat ceramic membranes (5) connected with membrane water collecting pipes (6) and then connected with water outlet pipelines through the membrane water collecting pipes (6).
5. The flat ceramic membrane water purifier according to claim 1, wherein: an ultrasonic vibrator (9) is arranged below the flat ceramic membrane (5), and the ultrasonic vibrator (9) is automatically controlled by an ultrasonic controller (8).
6. The flat ceramic membrane water purifier according to claim 1, wherein: the pore size distribution range of the flat ceramic membrane (5) is 0.01-0.5 mu m.
7. The flat ceramic membrane water purifier according to claim 1, wherein: the flat ceramic membrane (5) consists of a support body, a transition layer and a membrane layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921762965.9U CN211111436U (en) | 2019-10-21 | 2019-10-21 | Flat ceramic membrane water purifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921762965.9U CN211111436U (en) | 2019-10-21 | 2019-10-21 | Flat ceramic membrane water purifier |
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| Publication Number | Publication Date |
|---|---|
| CN211111436U true CN211111436U (en) | 2020-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921762965.9U Active CN211111436U (en) | 2019-10-21 | 2019-10-21 | Flat ceramic membrane water purifier |
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|---|---|
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2019
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