CN113750801B - Surface type reverse osmosis membrane filter element - Google Patents
Surface type reverse osmosis membrane filter element Download PDFInfo
- Publication number
- CN113750801B CN113750801B CN202111054375.2A CN202111054375A CN113750801B CN 113750801 B CN113750801 B CN 113750801B CN 202111054375 A CN202111054375 A CN 202111054375A CN 113750801 B CN113750801 B CN 113750801B
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- China
- Prior art keywords
- reverse osmosis
- osmosis membrane
- central tube
- shell
- raw water
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- 239000012528 membrane Substances 0.000 title claims abstract description 98
- 238000001223 reverse osmosis Methods 0.000 title claims abstract description 83
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 78
- 238000004140 cleaning Methods 0.000 claims abstract description 21
- 238000007790 scraping Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 6
- 239000000696 magnetic material Substances 0.000 claims description 3
- 239000003651 drinking water Substances 0.000 abstract description 4
- 235000020188 drinking water Nutrition 0.000 abstract description 4
- 230000009471 action Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 description 5
- 239000012535 impurity Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 4
- 241000826860 Trapezium Species 0.000 description 3
- 239000003292 glue Substances 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/025—Reverse osmosis; Hyperfiltration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
-
- 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
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Nanotechnology (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention belongs to the technical field of purifying drinking water, and particularly relates to a surface type reverse osmosis membrane filter element which comprises a shell, a central tube, a reverse osmosis membrane, a raw water inlet hole, a pull rod and a cleaning module, wherein the shell is provided with a straight groove, the raw water inlet hole is formed in the shell, the central tube is arranged in the reverse osmosis membrane, the pull rod is arranged in the straight groove, raw water enters the shell through the water inlet hole, under the action of water pressure, the raw water passes through the reverse osmosis membrane and enters the central tube body through the pure water inlet hole, when the reverse osmosis membrane needs to be cleaned, the reverse osmosis membrane can be pulled out, and is primarily cleaned through the cleaning module, so that the reverse osmosis membrane is cleaned by using cleaning liquid, the effect of cleaning the reverse osmosis membrane is achieved, and the use rate of the reverse osmosis membrane is improved.
Description
Technical Field
The invention belongs to the technical field of purifying drinking water, and particularly relates to a surface type reverse osmosis membrane filter element.
Background
The development of the industry of Chinese water purifiers has been in the past thirty years, along with serious pollution of water resources in recent years, diseases and hazard events caused by water pollution often occur, healthy and safe drinking water is more and more concerned, people's health drinking water consciousness is enhanced along with the serious pollution, the water purifier is widely accepted now, along with improvement of economic level of people and maturation of water purifier technology, the water purifier is being received by more families and gradually enters daily life of people, so that market demand is large, and huge market prospect is achieved, but the replacement rate is less than 1% after the service life is reached, impurities and harmful substances in water can be excessively remained on the surfaces of filter elements of all levels, the filter elements are blocked for a long time, the filtering effect is reduced, the internal parts of the water purifier are damaged, the purified water is not up to standard, reverse osmosis membrane elements of traditional water inlet modes are not high in price, the water resources are wasted seriously and are high in cost, and due to different water quality of bacteria in different areas, a large amount of scale, inorganic salt and heavy metal substances are accumulated on the surfaces of the reverse osmosis membrane, the traditional reverse osmosis membrane is blocked, and the reverse osmosis membrane is used in a high-efficient flushing treatment mode is prevented, and the reverse osmosis membrane is used in a shell efficient treatment mode is prevented.
Publication No.: CN111760458a discloses a surface type reverse osmosis membrane filter core, which comprises the following main contents: the invention discloses a surface type reverse osmosis membrane filter element, which comprises a first shell and a second shell rotationally connected with the first shell through a rotating shaft, wherein a limit ring is arranged in the first shell, a central shaft of the limit ring is elastically connected with the first shell through a rotary spring disc, an arc-shaped groove is formed in the limit ring, a clamping groove is formed in one side, far away from a first compression spring, of an arc-shaped clamping block, and the clamping groove is clamped with the clamping groove formed in the limit ring.
Because the water quality in each area is different, the filter core can be blocked by larger impurities in raw water, the filter core of the reverse osmosis membrane filter core disclosed by the invention is blocked after the filter core is used for a period of time, the integral structure is required to be removed for replacing the filter core, the use filtration of the filter core is lower, the quick cleaning of the filter core cannot be realized, the filter core utilization rate is improved, and the use cost is reduced.
Disclosure of Invention
The invention provides a surface type reverse osmosis membrane filter element, which solves the problems of low use efficiency and low purification efficiency of the traditional reverse osmosis membrane filter element.
The invention provides a surface type reverse osmosis membrane filter element, which solves the problem that a reverse osmosis membrane is difficult to clean when being blocked by impurities.
In order to achieve the above purpose, the invention adopts the technical scheme that: a surface type reverse osmosis membrane filter element, which is characterized in that: the device comprises a shell, a central tube, a reverse osmosis membrane, a raw water inlet hole, a pull rod and a cleaning module, wherein the shell is cylindrical, a straight groove is formed in the outer side of the shell, the raw water inlet hole is formed in the upper end of the shell, the central tube is arranged in the reverse osmosis membrane, the central tube and the reverse osmosis membrane are arranged in the shell, and the pull rod is arranged in the straight groove.
Preferably, the center tube comprises a center tube body, a pure water inlet hole and a pure water outlet hole, the cross section of the center tube body is circular, the pure water inlet hole is formed in the inner wall of the center tube body, and the pure water outlet hole is formed in the end portion of the center tube body.
Preferably, the outer surface of the central tube body is provided with a trapezoid groove.
Preferably, the casing is provided with a straight groove, one side of the top end of the straight groove is provided with a dovetail groove, the cleaning module is installed in the straight groove through the dovetail groove, the cleaning module comprises a first scraping plate, a second scraping plate, a first brush and a second brush, the first scraping plate and the first brush are made of high-strength materials, the low-density layout is arranged at a part close to the straight groove, the second scraping plate and the second brush are made of low-strength materials, and the high-density layout is arranged at a part far away from the straight groove.
Preferably, the reverse osmosis membrane comprises a raw water guide net, an RO membrane, a permeable net and a coil spring, wherein the coil spring is sequentially arranged among the raw water guide net, the RO membrane and the permeable net, the coil spring is arranged at two ends of the reverse osmosis membrane, the raw water guide net, the RO membrane and the permeable net are sequentially arranged from outside to inside, and the raw water guide net, the RO membrane and the permeable net are fixed through the coil spring.
Preferably, a bulge is arranged on one side of the coil spring, a pit is arranged on one side of the coil spring, and the bulge and the pit on the coil spring can fix the raw water diversion net, the RO membrane and the permeable net.
Preferably, one end of the reverse osmosis membrane adopts a trapezoid structure, the other end of the reverse osmosis membrane is connected with the pull rod, the central tube is provided with a trapezoid groove, and one end of the reverse osmosis membrane is placed in the trapezoid groove of the central tube in a trapezoid structure.
Preferably, the housing includes a first bearing mounted at an upper end of the housing and a second bearing mounted at a lower end of the housing.
Preferably, the first and second bearings are in close fit with the central tube.
Preferably, the pull rod adopts a trapezoid structure, and magnetic materials are arranged on two sides of the pull rod.
Compared with the prior art, the invention has the following beneficial effects.
1. When the reverse osmosis membrane filter element is used, raw water enters from the water inlet hole and fills the shell, the raw water enters the central pipe from the pure water inlet hole after being filtered by the reverse osmosis membrane filter element, and finally flows out of the central pipe.
2. According to the invention, the pull rod is arranged on the reverse osmosis membrane, when impurities of the reverse osmosis membrane are accumulated excessively, the reverse osmosis membrane is pulled out along the cleaning device by using the pull rod, raw water is used for cleaning, the pull rod is loosened after the cleaning is finished, and the coil spring arranged in the reverse osmosis membrane automatically pulls the reverse osmosis membrane back into the shell.
Drawings
Fig. 1 is an overall structural view of the present invention.
Fig. 2 is a drawing showing the structure of the reverse osmosis membrane of the present invention.
Fig. 3 is a view of a cleaning module of the present invention.
Fig. 4 is a view of the reverse osmosis membrane winding of the present invention.
FIG. 5 is a schematic view of the structure of the reverse osmosis membrane of the present invention.
In the figure: the device comprises a shell 1, a dovetail groove 101, a central tube 2, a pure water inlet 201, a pure water outlet 202, a trapezoid groove 203, a first bearing 3, a second bearing 4, a pull rod 5, a cleaning module 6, a first scraper 601, a first brush 602, a second scraper 603, a second brush 604, a reverse osmosis membrane 7, a coil spring 701, a raw water guide net 702, an RO membrane 703, a permeable net 704, a raw water inlet 8 and a straight groove 9.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present invention are included in the protection scope of the present invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention 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 invention.
Fig. 1 to 5 show: the utility model provides a surface formula reverse osmosis membrane filter core, includes casing 1, center tube 2, reverse osmosis membrane 7, raw water inlet opening 8, pull rod 5 and clearance module 6, casing 1 adopts cylindrical structure, casing 1 opens has straight flute 9, raw water inlet opening 8 installs the upper end at casing 1, center tube 2 is established in reverse osmosis membrane 7, center tube 2 and reverse osmosis membrane 7 are placed in casing 1, pull rod 5 sets up in straight flute 9.
Specifically, the center tube 2 includes pure water inlet opening 201 and pure water outlet opening 202, and the center tube 2 body cross-section is circular, and on the inner wall of center tube 2 body was located to pure water inlet opening 201, the tip of center tube 2 body was located to pure water outlet opening 202, through adopting above-mentioned technical scheme, pure water got into center tube 2 through reverse osmosis membrane 7, and pure water inlet opening 201 lets pure water get into center tube 2, and pure water is derived to required position through the center tube 2 body.
Specifically, the outer surface of the tube body of the central tube 2 is provided with the trapezoid groove 203, by adopting the technical scheme, the trapezoid groove 203 is arranged on the central tube 2, so that the reverse osmosis membrane 7 is convenient to install, the use of reverse osmosis membrane glue is reduced, and harmful substances are prevented from entering a human body.
Specifically, open on the casing 1 has straight flute 9, and dovetail 101 has been seted up to straight flute 9 top one side, and clearance module 6 passes through dovetail 101 to be installed in straight flute 9, and clearance module 6 includes: the first scraper blade 601, the second scraper blade 603, first brush 602 and second brush 603, and first scraper blade 601 and first brush 602 adopt intensity high material, and low density overall arrangement is being close to the part of straight flute 9, and second scraper blade 603 and second brush 604 adopt low intensity material, and high density overall arrangement is keeping away from the part of straight flute 9, through adopting above-mentioned technical scheme, open on straight flute 9 has dovetail 101 to be convenient for clear up the installation of module 6, impurity on reverse osmosis membrane 7 is cleared up many times that reverse osmosis membrane 7 can be fine when reverse osmosis membrane 7 is pulled out.
Specifically, the reverse osmosis membrane 7 includes: the raw water diversion net 702, the RO membrane 703, the permeable net 704 and the coil spring 701, wherein the coil spring 701 is sequentially arranged among the raw water diversion net 702, the RO membrane 703 and the permeable net 704, the coil spring 701 is arranged in an interlayer close to the pure water outlet hole 202, the reverse osmosis membrane 7 is sequentially arranged from outside to inside, the raw water diversion net 702, the RO membrane 703 and the permeable net 704 are sequentially fixed through the coil spring 701, raw water enters the central tube 2 from the outer side of the circumference of the reverse osmosis membrane 7 by adopting the technical scheme, the filtering area is increased, the filtering quality of raw water is enhanced, the flow rate of raw water is ensured, the water yield is improved, and the coil spring 701 is convenient for the recovery of the reverse osmosis membrane 7 after being pulled out.
Specifically, the bulge is arranged on one side of the coil spring 701, the pit is arranged on the other side of the coil spring 701, and by adopting the technical scheme, the bulge on the coil spring 701 and the pit can be matched to fix the raw water diversion net 702, the RO membrane 703 and the permeable net 704 well, so that the reverse osmosis membrane 7 is prevented from being wrinkled when being retracted.
Specifically, reverse osmosis membrane 7 one end adopts trapezium structure, and the other end links to each other with pull rod 5, opens on the center tube 2 has trapezoidal slot 203, and in the trapezoidal slot 203 of center tube 2 was placed to reverse osmosis membrane 7's one end trapezium structure, through adopting above-mentioned technical scheme, reverse osmosis membrane 7 uses trapezium structure to install in trapezoidal slot 203, fixes on center tube 2, also can drop when guaranteeing reverse osmosis membrane 7 to pull out.
Specifically, the casing includes first bearing 3 and second bearing 4, and first bearing 3 installs in casing 1 lower extreme, and second bearing 4 installs in casing 1 upper end, through adopting above-mentioned technical scheme, and the bearing adopts sealed bearing, and central tube 2 seals with casing 1.
Specifically, the first bearing 3 and the second bearing 4 are tightly matched with the central tube 2, and by adopting the technical scheme, the central tube 2 can rotate.
Specifically, the pull rod 5 adopts a trapezoid structure, and magnetic materials are arranged on two sides of the pull rod 5, so that the pull rod 5 can be tightly clung to the key groove to seal the shell 1 by adopting the technical scheme.
Working principle: when the reverse osmosis membrane cleaning device is used, raw water enters from the raw water inlet hole 8 and fills the shell 1, raw water can enter the filter element under the action of water pressure, after filtration, the raw water enters the central tube 2 through the pure water inlet hole 201, pure water is led out from the pure water outlet hole 202 through the central tube 2, the reverse osmosis membrane 7 is installed on the central tube 2 through a trapezoid block, the use of glue can be reduced, harmful substances are prevented from entering a human body, when the reverse osmosis membrane 7 needs to be cleaned, the reverse osmosis membrane 7 is pulled out through the pull rod 5, when the reverse osmosis membrane 7 passes through the cleaning module 6, the reverse osmosis membrane 7 is cleaned to different degrees through the scraping plate and the brush on the cleaning module 6, after the reverse osmosis membrane 7 is pulled out, the reverse osmosis membrane 7 is flushed through the cleaning liquid, the pull rod 5 is loosened, the reverse osmosis membrane 7 can be automatically pulled back under the action of the coil spring 701, and the pull rod 5 is tightly attached to the straight groove 9 to form sealing.
While the basic principles and main features of the present invention and advantages of the present invention have been shown and described, it will be understood by those skilled in the art that the present invention is not limited by the foregoing embodiments, which are described in the foregoing specification merely illustrate the principles of the present invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention, which is defined in the appended claims and their equivalents.
Claims (3)
1. A surface type reverse osmosis membrane filter element, which is characterized in that: the device comprises a shell (1), a central tube (2), a reverse osmosis membrane (7), a raw water inlet hole (8), a pull rod (5) and a cleaning module (6), wherein the shell (1) is cylindrical, a straight groove (9) is formed in the outer side of the shell (1), the raw water inlet hole (8) is formed in the upper end of the shell (1), the central tube (2) is arranged in the reverse osmosis membrane (7), the central tube (2) and the reverse osmosis membrane (7) are arranged in the shell, and the pull rod (5) is arranged in the straight groove (9);
the outer surface of the central tube (2) is provided with a trapezoid groove (203);
The cleaning device is characterized in that a straight groove (9) is formed in the shell (1), a dovetail groove (101) is formed in one side of the top end of the straight groove (9), a cleaning module (6) is installed in the straight groove (9) through the dovetail groove (101), the cleaning module (6) comprises a first scraping plate (601), a second scraping plate (603), a first hairbrush (602) and a second hairbrush (604), the first scraping plate (601) and the first hairbrush (602) are made of high-strength materials, the low-density layout is arranged on the part close to the straight groove (9), the second scraping plate (603) and the second hairbrush (604) are made of low-strength materials, and the high-density layout is away from the part of the straight groove (9);
The reverse osmosis membrane (7) comprises a raw water diversion net (702), an RO membrane (703), a permeable net (704) and a coil spring (701), wherein the coil spring (701) is sequentially arranged among the raw water diversion net (702), the RO membrane (703) and the permeable net (704), the coil spring (701) is arranged at two ends of the reverse osmosis membrane (7), the raw water diversion net (702), the RO membrane (703) and the permeable net (704) are sequentially arranged from outside to inside, and the raw water diversion net (702), the RO membrane (703) and the permeable net (704) are fixed through the coil springs;
A bulge is arranged on one side of the coil spring (701), a pit is arranged on one side of the coil spring (701), and the bulge and the pit on the coil spring (701) can fix the raw water diversion net (702), the RO membrane (703) and the permeable net (704);
one end of the reverse osmosis membrane (7) is of a trapezoid structure, the other end of the reverse osmosis membrane is connected with the pull rod (5), a trapezoid groove (203) is formed in the central tube (2), and the trapezoid structure at one end of the reverse osmosis membrane (7) is placed in the trapezoid groove (203) of the central tube (2);
The pull rod (5) adopts a trapezoid structure, and magnetic materials are arranged on two sides of the pull rod (5);
the central tube (2) comprises a pure water inlet hole (201) and a pure water outlet hole (202), the cross section of the body of the central tube (2) is circular, the pure water inlet hole (201) is formed in the inner wall of the body of the central tube (2), and the pure water outlet hole (202) is formed in the end portion of the body of the central tube (2).
2. A surface reverse osmosis membrane cartridge according to claim 1, characterized in that: the shell (1) comprises a first bearing (3) and a second bearing (4), the first bearing (3) is arranged at the upper end of the shell (1), and the second bearing (4) is arranged at the lower end of the shell (1).
3. A surface reverse osmosis membrane cartridge according to claim 2, characterized in that: the first bearing (3) and the second bearing (4) are tightly matched with the central tube (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111054375.2A CN113750801B (en) | 2021-09-09 | 2021-09-09 | Surface type reverse osmosis membrane filter element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111054375.2A CN113750801B (en) | 2021-09-09 | 2021-09-09 | Surface type reverse osmosis membrane filter element |
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| Publication Number | Publication Date |
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| CN113750801A CN113750801A (en) | 2021-12-07 |
| CN113750801B true CN113750801B (en) | 2024-06-21 |
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| CN202111054375.2A Active CN113750801B (en) | 2021-09-09 | 2021-09-09 | Surface type reverse osmosis membrane filter element |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114288860B (en) * | 2021-12-08 | 2022-09-23 | 深圳市超纯环保股份有限公司 | Reverse osmosis membrane element and purification system |
| CN114682094B (en) * | 2022-03-31 | 2023-04-28 | 青岛大学附属医院 | Reverse osmosis treatment device of dialysis equipment for nephrology department |
| CN115888397B (en) * | 2022-11-29 | 2023-08-01 | 浙江奥氏环境科技有限公司 | Rolling reverse osmosis membrane assembly |
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| CN207266176U (en) * | 2017-08-25 | 2018-04-20 | 西安联利通讯技术有限公司 | A kind of video conferencing system |
| CN209254516U (en) * | 2018-11-13 | 2019-08-16 | 安徽国正药业股份有限公司 | A kind of reverse osmosis membrane |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101811773B (en) * | 2010-04-16 | 2011-11-16 | 同济大学 | Online cleaning roll-type membrane bioreactor |
| CN104815560A (en) * | 2015-05-01 | 2015-08-05 | 江苏诚信药业有限公司 | Process system of preparing pantoprazole sodium hemihydrate |
| DE102018128963A1 (en) * | 2018-11-19 | 2020-05-20 | Mann+Hummel Gmbh | Filter body, filter element and filter arrangement |
| CN213546728U (en) * | 2020-12-23 | 2021-06-25 | 广东思普线缆实业有限公司 | Power line with automatic storage function |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207266176U (en) * | 2017-08-25 | 2018-04-20 | 西安联利通讯技术有限公司 | A kind of video conferencing system |
| CN209254516U (en) * | 2018-11-13 | 2019-08-16 | 安徽国正药业股份有限公司 | A kind of reverse osmosis membrane |
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