CN209872701U - Reclaimed water recycling device with high automatic treatment - Google Patents
Reclaimed water recycling device with high automatic treatment Download PDFInfo
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- CN209872701U CN209872701U CN201920539005.XU CN201920539005U CN209872701U CN 209872701 U CN209872701 U CN 209872701U CN 201920539005 U CN201920539005 U CN 201920539005U CN 209872701 U CN209872701 U CN 209872701U
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- Prior art keywords
- membrane
- reclaimed water
- inorganic ceramic
- anaerobic
- reservoir
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 88
- 238000004064 recycling Methods 0.000 title claims abstract description 35
- 239000012528 membrane Substances 0.000 claims abstract description 96
- 239000000919 ceramic Substances 0.000 claims abstract description 37
- 238000007599 discharging Methods 0.000 claims abstract description 10
- 238000012545 processing Methods 0.000 claims abstract description 9
- 230000001105 regulatory effect Effects 0.000 claims abstract description 9
- 239000002131 composite material Substances 0.000 claims abstract description 8
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 10
- 239000004408 titanium dioxide Substances 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- VCRLKNZXFXIDSC-UHFFFAOYSA-N aluminum oxygen(2-) zirconium(4+) Chemical compound [O--].[O--].[Al+3].[Zr+4] VCRLKNZXFXIDSC-UHFFFAOYSA-N 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 abstract description 9
- 230000004907 flux Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 description 21
- 239000010865 sewage Substances 0.000 description 20
- 238000005516 engineering process Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 239000000126 substance Substances 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 241000282414 Homo sapiens Species 0.000 description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005374 membrane filtration Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000035622 drinking Effects 0.000 description 2
- 239000003651 drinking water Substances 0.000 description 2
- 235000020188 drinking water Nutrition 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000009287 sand filtration Methods 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 238000003980 solgel method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- VCOYRKXQRUGBKS-UHFFFAOYSA-N N.[Cl] Chemical compound N.[Cl] VCOYRKXQRUGBKS-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000003287 bathing Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
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- 229910001410 inorganic ion Inorganic materials 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
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- 244000005700 microbiome Species 0.000 description 1
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- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 244000052769 pathogen Species 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
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- 230000008929 regeneration Effects 0.000 description 1
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- 238000011160 research Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
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- 230000001502 supplementing effect Effects 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model relates to a reclaimed water recycling device with high automatic treatment, which relates to the technical field of water treatment and comprises a thick grating, a regulating reservoir, an anaerobic pool, a membrane bioreactor, a recycling or discharging water tank, a thin grating, a fan, a vacuum meter, a suction pump, a constant flow valve and a flow meter; the coarse grid is connected with the regulating reservoir through a pipeline, the regulating reservoir is connected with the anaerobic reservoir through a fine grid, the anaerobic reservoir is connected with the membrane bioreactor, the bottom of the membrane bioreactor is provided with a pump and is connected with the anaerobic reservoir through a backflow pipeline, and the bottom of the membrane bioreactor is also provided with a fan and is sequentially connected with a vacuum meter, a suction pump, a constant flow valve and a flow meter through pipelines. The device of the utility model has accurate control, higher automation degree, thorough treatment and standard discharge; the inorganic ceramic membrane processing device can realize on-line back flushing, and the membrane flux is stable; due to the unique structure and mechanical property of the composite ceramic membrane, the composite ceramic membrane can effectively bear the recoil pressure below 0.4mp, and can realize online recoil.
Description
Technical Field
The utility model relates to a sewage treatment plant, in particular to reclaimed water recycling device of high automated processing relates to water treatment technical field.
Background
The reclaimed water treatment process is generally divided into 3 types according to the treatment method: 1. physical treatment method: the membrane filtration method is suitable for the condition of large water quality change. The process is characterized in that: the device is compact, easy to operate, and less affected by load variations. The membrane filtration method is that under the action of external force, the separated solution flows along the surface of a filter membrane at a certain flow rate, and the solvent, low molecular weight substances and inorganic ions in the solution permeate the filter membrane from the high-pressure side to enter the low-pressure side and are discharged as filtrate; and high molecular substances, colloidal particles, microorganisms and the like in the solution are intercepted by the ultrafiltration membrane, and the solution is concentrated and discharged in a concentrated form. A heat evaporation method: is suitable for any water quality. The process is characterized in that: high stability, easy maintenance, long service life, simple operation and no influence on the operation of the equipment due to water quality fluctuation. The evaporation heating method is to separate pure water and salt solid under the condition that the solution reaches the boiling point in an evaporation body by heating evaporation, the pure water is condensed into pure water in a steam form, and the concentrated solution is continuously circulated and evaporated to form the salt solid. The pure water quality can achieve the purpose of reclaimed water recycling through a series of measures such as filtration and the like. 2. A physical and chemical method: is suitable for the condition of large change of the sewage quality. The methods generally adopted are: sand filtration, activated carbon adsorption, flotation, coagulating sedimentation and the like. The process is characterized in that: the hollow fiber ultrafilter is adopted for processing, the technology is advanced, the structure is compact, the occupied area is small, the system runs intermittently, and the management is simple. 3. Biological treatment method: is suitable for sewage with high organic matter content. Generally, biological treatment methods such as an activated sludge method, a contact oxidation method, a biological rotating disk and the like are used. Or used alone or in combination with several biological treatment methods, such as contact oxidation plus biological filter; biological filter and active carbon adsorption; and (5) rotating disc sand filtration and other processes. The process has the advantages of strong capability of adapting to hydraulic load change, less sludge generation amount, easy maintenance and management and the like.
At present, some countries and regions develop water resources excessively and without control, and simultaneously have poor environmental protection consciousness, so that surface water and underground water are polluted to different degrees, and the supply of fresh water with good water quality is limited; secondly, the distance between the fresh water source to be developed and the centralized water supply point is far, the one-time investment cost is high, and the water supply capacity cannot be expanded in some water-deficient areas. To the extent of non-drinking, a mid-water concept was introduced here. The reclaimed water is high-quality miscellaneous drainage (without excrement and kitchen drainage), miscellaneous drainage (without excrement sewage) and domestic sewage (waste water) which are used in life and production and are recycled after flow concentration regeneration treatment, and is used as the miscellaneous water which is not directly contacted with human bodies, such as ground cleaning, flower watering, car washing, air-conditioning cooling, toilet flushing, fire fighting and the like. The water quality index is lower than the water quality standard of drinking water in urban water supply and higher than the discharge standard of sewage water allowed to be discharged into the ground, namely the water quality is between the water quality of domestic drinking water and the water quality standard of sewage water allowed to be discharged, so the water quality index is named as 'reclaimed water'.
The development and reuse technology of the reclaimed water is rapidly developed and widely applied to countries (particularly Japan) such as America, Japan, India, UK and the like. The countries determine the reclaimed water recycling technology suitable for the national conditions by the characteristics of the country and the region, so that the reclaimed water recycling technology is more and more improved. In China, the technology is valued by governments and related departments at all levels, and a great deal of theoretical research and practical work is carried out on the reuse of reclaimed water in buildings, so that the operation of reclaimed water engineering is developed in many cities in China, such as Shenzhen, Beijing, Qingdao, Tianjin, Taiyuan and the like, and remarkable effects are achieved. Industrial enterprises and partial civil enterprises in China, such as enterprises with serious pollution and more water resource utilization, build reclaimed water recycling projects, and make contributions to low-carbon production and national-grade calling for energy conservation and emission reduction.
At present, water resources in a large area of China are in a tension state, the problem of water resource shortage is gradually severe, the sewage treatment pressure is increased, and the cost of domestic and business water is greatly increased. How to solve the problem of water resource shortage and sewage reuse is a social problem which is urgently needed to be solved.
With the gradual improvement of the consciousness of environmental protection and resource conservation of human beings, the recycling of reclaimed water is an important method for recycling sewage. The reclaimed water reuse technology is characterized in that domestic waste (sewage) water (bath, washing, clothes washing, kitchen and toilet) of residential communities is treated in a centralized manner to reach certain standards and is reused for greening irrigation, vehicle flushing, road flushing, household toilet flushing and the like of the residential communities, so that the purpose of saving water is achieved. It can reduce environmental pollution and increase the amount of available water resources.
However, domestic sewage contains a large amount of organic pollutants and pathogens, which are harmful to the water body in the surrounding environment if discharged without treatment and seriously affect the health of people, so strict biochemical and disinfection treatment must be carried out to minimize the influence on the environment and the water body. Therefore, thorough sewage treatment is necessary.
The water reuse system in the traditional biological treatment method generally has the problems of inaccurate control, low automation degree and the like, and the sewage treatment system is not thorough in treatment, so that the discharge does not reach the standard and the system has serious harm to the environment and human bodies.
Therefore, the reclaimed water recycling treatment device which is accurate in control, has higher automation degree and is thorough in treatment and can reach the discharge standard is provided, and the technical problem which needs to be solved urgently in the technical field is solved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a control is accurate, have higher degree of automation, handles thoroughly moreover, discharges the reuse of reclaimed water processing apparatus up to standard.
The above object of the present invention is achieved by the following technical solutions:
the utility model provides a reuse of reclaimed water device of high automated processing which characterized in that: comprises a coarse grating, an adjusting tank, an anaerobic tank, a membrane bioreactor, a recycling or discharging water tank, a fine grating, a fan, a vacuum meter, a suction pump, a constant flow valve and a flowmeter; the coarse grid is connected with a regulating reservoir through a pipeline, the regulating reservoir is connected with an anaerobic reservoir through a fine grid, the anaerobic reservoir is connected with a membrane bioreactor, the bottom of the membrane bioreactor is provided with a pump and is connected with the anaerobic reservoir through a backflow pipeline, the bottom of the membrane bioreactor is also provided with a fan and is sequentially connected with a vacuum meter, a suction pump, a constant flow valve and a flow meter through pipelines, and further connected with a recycling or discharging water tank.
Preferably, the membrane bioreactor is an inorganic ceramic membrane.
Preferably, the inorganic ceramic membrane is a double-layer membrane structure and comprises an inner membrane and an outer membrane, the outer membrane is a titanium dioxide membrane, and the inner membrane is an aluminum oxide-zirconium oxide composite membrane structure.
Preferably, the thickness of the inorganic ceramic film is 50-60 μm.
Preferably, the inorganic ceramic membrane has a membrane pore size of 0.01 to 0.5 μm.
Preferably, the inorganic ceramic film has a porosity of 44 to 46%.
Preferably, the filtration pressure of the inorganic ceramic membrane is 1.0 Mpa.
Preferably, the recoil pressure of the inorganic ceramic membrane is 0.4Mpa or less.
Has the advantages that:
the reclaimed water recycling device with high automation treatment of the utility model has accurate control, higher automation degree, thorough treatment and standard discharge; the inorganic ceramic membrane processing device can realize on-line back flushing, and the membrane flux is stable; due to the unique structure and mechanical property of the composite ceramic membrane, the composite ceramic membrane can effectively bear the back flushing pressure below 0.4mp, and can realize on-line back flushing, thereby obtaining stable membrane flux, overcoming the problems of high price, easy pollution, small membrane flux, huge equipment and the like of an inorganic membrane system in water treatment application, and enabling the application of the inorganic ceramic membrane system in water treatment to be possible. The inorganic ceramic membrane in the reclaimed water recycling inorganic ceramic membrane treatment device is specially designed for sewage treatment, and has the biggest characteristic of large membrane flux, the operating membrane flux is 10-100 times of that of an organic membrane, 50-10 times of that of a common porous ceramic membrane, high mechanical strength, pollution resistance and capability of realizing online backflushing.
Drawings
Fig. 1 is a schematic structural view of a reclaimed water recycling device for highly automated treatment according to embodiment 1 of the present invention.
Name of major component
1 coarse grid 2 adjusting pool
3 anaerobic pool 4 Membrane bioreactor (aerobic pool)
5 recycling or draining water tank 6 fine grid
7 blower 8 vacuum meter
9 suction pump 10 constant flow valve
11 flow instrument
Detailed Description
Example 1
As shown in fig. 1, the structure of the reclaimed water recycling device with high automation treatment according to embodiment 1 of the present invention is schematically illustrated, wherein 1 is a thick grating, 2 is a regulating tank, 3 is an anaerobic tank, 4 is a membrane bioreactor (aerobic tank), 5 is a recycling or discharging water tank, 6 is a thin grating, 7 is a blower, 8 is a vacuum gauge, 9 is a suction pump, 10 is a constant flow valve, and 11 is a flow meter; the reclaimed water recycling device for high-automation treatment of the embodiment 1 of the utility model comprises a thick grating 1, a regulating tank 2, an anaerobic tank 3, a membrane bioreactor (aerobic tank) 4, a recycling or discharging water tank 5, a thin grating 6, a fan 7, a vacuum meter 8, a suction pump 9, a constant flow valve 10 and a flow meter 11; the coarse grid 1 is connected with the adjusting tank 2 through a pipeline, the adjusting tank 2 is connected with the anaerobic tank 3 through the fine grid 6, the anaerobic tank 3 is connected with the membrane bioreactor (aerobic tank) 4, the bottom of the membrane bioreactor (aerobic tank) 4 is provided with a pump and is connected with the anaerobic tank 3 through a backflow pipeline, the bottom of the membrane bioreactor (aerobic tank) 4 is also provided with a fan 7 and is sequentially connected with a vacuum meter 8, a suction pump 9, a constant flow valve 10 and a flow meter 11 through pipelines, and then is connected with a recycling or discharging water tank 5.
The membrane bioreactor (aerobic tank) 4 is an inorganic ceramic membrane; the inorganic ceramic membrane is of a double-layer membrane structure and comprises an inner membrane and an outer membrane, wherein the outer membrane is a titanium dioxide membrane, the inner membrane is of an aluminum oxide-zirconium oxide composite membrane structure, the thickness of the membrane layer of the inorganic ceramic membrane is 50-60 mu m, the membrane aperture of the inorganic ceramic membrane is 0.01-0.5 mu m, the porosity of the inorganic ceramic membrane is 44-46%, the filtering pressure of the inorganic ceramic membrane is 1.0Mpa, and the recoil pressure of the inorganic ceramic membrane is less than 0.4 Mpa.
The utility model discloses inorganic ceramic membrane's preparation in well high automated processing's reuse of reclaimed water device of embodiment 1 is as follows: preparing titanium dioxide (TiO2) sol on the surface of a membrane filter layer by a sol-gel method, and coating a nano titanium dioxide (TiO2) photocatalytic material on the surface of a ceramic membrane by a dip-coating method, so that the surface of the ceramic membrane has a self-cleaning function, accumulation and blockage of organic matters on the surface of the membrane are slowed down, membrane pollution is reduced, the strength and the membrane filtration flux of a ceramic membrane tube are improved, the membrane flux stability is improved, and the mechanical property of the membrane tube is better; the utility model discloses an inorganic ceramic membrane adopts whole composite technology, through the sol-gel method, prepares aluminium oxide-zirconia (Al2O3-ZrO2) complex film, because contain ZrO2 material and Al2O3, materials such as SiO2 and TiO2 compare, has characteristics such as better mechanical strength, chemical durability and alkali erosion resistance, the utility model discloses an inorganic ceramic membrane has stronger mechanical strength and thermal stability, and the aperture distribution of complex film is narrow moreover, is the unimodal.
The utility model discloses embodiment 1's reclaimed water recycling device's of high automated processing's process flow is as follows:
domestic sewage enters a coarse grid 1 for treatment, the treated sewage enters an adjusting tank 2, the sewage of the adjusting tank 2 enters a fine grid 6 for treatment through a pump and then enters an anaerobic tank 3 for anaerobic treatment, the sewage subjected to the anaerobic treatment overflows to a membrane bioreactor (aerobic tank) 4 for treatment, the sewage subjected to the aerobic treatment sequentially passes through a vacuum meter 8, a suction pump 9, a constant flow valve 10 and a flow meter 11 through a fan 7 for treatment, and then enters a recycling or discharging water tank 5 for storage, and reclaimed water is recycled; the chemical oxygen demand and the ammonia chlorine detection device in the recycling or discharging water tank 5 monitors the water quality therein. The qualified water can be used for non-drinking purposes such as landscaping, environment greening, flushing, ornamental water supplementing and the like in a bathing pool.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the details of the above embodiments, and the technical concept of the present invention can be within the scope of the present invention to perform various simple modifications to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.
Claims (8)
1. The utility model provides a reuse of reclaimed water device of high automated processing which characterized in that: comprises a coarse grating, an adjusting tank, an anaerobic tank, a membrane bioreactor, a recycling or discharging water tank, a fine grating, a fan, a vacuum meter, a suction pump, a constant flow valve and a flowmeter; the coarse grid is connected with a regulating reservoir through a pipeline, the regulating reservoir is connected with an anaerobic reservoir through a fine grid, the anaerobic reservoir is connected with a membrane bioreactor, the bottom of the membrane bioreactor is provided with a pump and is connected with the anaerobic reservoir through a backflow pipeline, the bottom of the membrane bioreactor is also provided with a fan and is sequentially connected with a vacuum meter, a suction pump, a constant flow valve and a flow meter through pipelines, and further connected with a recycling or discharging water tank.
2. The reclaimed water recycling device with high automation degree according to claim 1, characterized in that: the membrane bioreactor is an inorganic ceramic membrane.
3. The reclaimed water recycling device with high automation degree according to claim 1, characterized in that: the inorganic ceramic membrane is of a double-layer membrane structure and comprises an inner membrane and an outer membrane, wherein the outer membrane is a titanium dioxide membrane, and the inner membrane is of an aluminum oxide-zirconium oxide composite membrane structure.
4. The reclaimed water recycling device with high automation degree according to claim 1, characterized in that: the thickness of the film layer of the inorganic ceramic film is 50-60 mu m.
5. The reclaimed water recycling device with high automation degree according to claim 1, characterized in that: the membrane aperture of the inorganic ceramic membrane is 0.01-0.5 μm.
6. The reclaimed water recycling device with high automation degree according to claim 1, characterized in that: the inorganic ceramic film has a porosity of 44 to 46%.
7. The reclaimed water recycling device with high automation degree according to claim 1, characterized in that: the filtering pressure of the inorganic ceramic membrane is 1.0 Mpa.
8. The reclaimed water recycling device with high automation degree according to claim 1, characterized in that: the recoil pressure of the inorganic ceramic membrane is below 0.4 Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920539005.XU CN209872701U (en) | 2019-04-19 | 2019-04-19 | Reclaimed water recycling device with high automatic treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920539005.XU CN209872701U (en) | 2019-04-19 | 2019-04-19 | Reclaimed water recycling device with high automatic treatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209872701U true CN209872701U (en) | 2019-12-31 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920539005.XU Expired - Fee Related CN209872701U (en) | 2019-04-19 | 2019-04-19 | Reclaimed water recycling device with high automatic treatment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209872701U (en) |
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2019
- 2019-04-19 CN CN201920539005.XU patent/CN209872701U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191231 |
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| CF01 | Termination of patent right due to non-payment of annual fee |