CN112516802A - Hollow fiber membrane element and method for producing same - Google Patents
Hollow fiber membrane element and method for producing same Download PDFInfo
- Publication number
- CN112516802A CN112516802A CN202011194668.6A CN202011194668A CN112516802A CN 112516802 A CN112516802 A CN 112516802A CN 202011194668 A CN202011194668 A CN 202011194668A CN 112516802 A CN112516802 A CN 112516802A
- Authority
- CN
- China
- Prior art keywords
- hollow fiber
- fiber membrane
- central tube
- adhesive
- central
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- B01D63/02—Hollow fibre modules
- B01D63/021—Manufacturing thereof
-
- 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
- B01D63/02—Hollow fibre modules
- B01D63/021—Manufacturing thereof
- B01D63/022—Encapsulating hollow fibres
-
- 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
Abstract
The hollow fiber membrane element is characterized in that the hollow fiber membrane is a hollow fiber membrane formed by parallelly arranging a plurality of hollow fiber membrane wires and then bonding the hollow fiber membrane wires, one end of the hollow fiber membrane is sealed to form a closed end, the other end of the hollow fiber membrane is opened to form an open end, the open end of the hollow fiber membrane is adhered to the side wall of the central tube and is sealed, the central tube is wound on the central tube by taking the central tube as a central shaft, and a waterproof adhesive tape is wound on the outer side of the hollow fiber membrane. The invention also discloses a manufacturing method of the hollow fiber membrane element. The manufacturing time of the invention is greatly shortened; the end face does not need to be cut, the utilization rate of the hollow fiber is improved, the manufacturing process is reduced, and the equipment research and development and manufacturing production cost are greatly reduced.
Description
Technical Field
The invention relates to a water filtration membrane component, in particular to a hollow fiber membrane component and a manufacturing method thereof.
Background
Most of the manufacturing processes of hollow fiber membrane elements in the domestic market at present are manual, the automation degree is low, the manufacturing process is unreasonable, the structural consistency is poor, and the concentration polarization and the utilization rate are low due to uneven fiber arrangement and internal arrangement of the packaging end face of the membrane element.
Most hollow fiber membrane elements use the operation in-process, because the accumulation of filtrate impurity to and the internal pressure of water team membrane element makes hollow fiber filter core membrane become to gather together to concentrate densely and tightly when using, the unable abundant contact water of inside part hollow fiber membrane, and then produces concentration polarization, the problem that the pollutant can't be got rid of smoothly has reduced the performance of membrane element, finally makes hollow fiber filter core membrane element life greatly reduced.
Most of the manufacturing processes of hollow fiber membrane elements need to cut and finish the hollow fiber membranes for many times, the membrane elements need to be cut again after being packaged, the hollow fiber membranes are seriously wasted, the process loss of the adhesive is also large, various devices are needed for cutting and packaging, and membrane elements and environment pollution are easily caused by cutting dust.
Disclosure of Invention
The first technical problem to be solved by the present invention is to provide a hollow fiber membrane element with uniform fiber arrangement on the package end face and uniform arrangement inside the package end face, aiming at the technical current situation.
The second technical problem to be solved by the present invention is to provide a method for preparing a hollow fiber membrane element with uniform fiber arrangement on the end face of the package and uniform arrangement inside the package, in view of the above technical situation.
A third technical problem to be solved by the present invention is to provide a method for producing a hollow fiber membrane element with high production efficiency and low cost, in view of the above-mentioned technical situation.
The technical scheme adopted by the invention for solving the first technical problem is as follows: a hollow fiber membrane element comprises a central tube and a hollow fiber membrane arranged around the central tube, wherein the central tube is provided with a hollow purified water outlet and a flow guide hole on the side wall, one end of the hollow fiber membrane is a water inlet end, and the other end of the hollow fiber membrane is a concentrated water outlet end.
Further, the open ends of the hollow fiber membranes are sealed by adhering an inner layer of adhesive tape or solid glue to the side wall of the central tube.
Further, the middle part of the hollow fiber membrane is provided with an adhesive for supporting, or the middle part of the hollow fiber membrane is provided with a separation flow guide net for supporting.
Further, the periphery of the waterproof adhesive tape is provided with a sealing retainer ring.
Further, waterproof sticky tape periphery upper end is equipped with upper seal end, and the lower extreme is equipped with lower seal end.
Furthermore, the center tube is hollow in the axial direction, one end of the center tube forms a plug end, and the other end of the center tube forms a socket end which can be used for the plug end to be inserted and matched. The two hollow fiber membrane elements can be assembled to form multi-stage water filtration.
The technical scheme adopted by the invention for solving the second and third technical problems is as follows: a method for manufacturing a hollow fiber membrane element is characterized by comprising the following steps:
firstly, orderly arranging a plurality of hollow fiber membrane filaments with certain lengths to the width required by a membrane element according to a certain distance, then coating an adhesive on two ends of the hollow fiber membrane filaments, and fixedly connecting the two ends;
plugging a central hole at one end of the hollow fiber membrane wire by using an adhesive to form a closed end, and opening a central hole at the other end to form an open end to prepare a hollow fiber membrane;
coating an adhesive on the central tube, adhering the open end of the hollow fiber membrane to the central tube, and sealing the central hole and the diversion hole of the central tube by using an inner layer adhesive tape or a solid adhesive to form a sealed cavity; and then taking the central tube as a central shaft, keeping the hollow fiber membrane tensioned with a certain tension, winding the hollow fiber membrane on the central tube in order, and after the winding is finished, winding the hollow fiber membrane by using a waterproof adhesive tape to fix the hollow fiber membrane.
Further, the middle part of the hollow fiber membrane silk is coated with adhesive to form an adhesive section.
Preferably, the bonding width of the adhesive coated on both ends of the hollow fiber membrane filaments is 10mm to 30mm, and the thickness of the adhesive layer is more than 0.5mm larger than the diameter of the hollow fiber membrane.
Furthermore, a separation flow guide net is bonded in the middle of the hollow fiber membrane before the hollow fiber membrane is wound on the central pipe.
Further, after the waterproof adhesive tape is wound, a sealing retainer ring or a sealing end is arranged on the periphery of the waterproof adhesive tape.
Compared with the prior art, the invention has the advantages that:
according to the invention, epoxy resin or polyurethane resin and a matched tool clamp are not required to be used for encapsulating, so that the material cost and the manufacturing cost are reduced; the time for waiting for the curing of the pouring sealant reaction to reach the physical and chemical properties (generally, the end face can be cut or other air tightness detection can be carried out within more than 24 hours) is not needed, and the time is greatly shortened; the end face does not need to be cut, the utilization rate of the hollow fiber is improved, the manufacturing process is reduced, and the equipment research and development and manufacturing production cost are greatly reduced.
According to the membrane element manufactured by the method, the end faces and the interior of the hollow fiber membranes are arranged in a certain sequence, the structural consistency of the membrane element is controllable, and because the sizes of the gaps between the hollow fiber membranes are consistent and controllable, the channels of water flow are uniform, so that the concentration polarization resistance and the filtration performance are greatly improved, the maintenance and cleaning frequency is reduced, and the service life of the membrane element is prolonged.
The invention is suitable for various hollow fiber membrane filter elements, in particular to novel hollow fiber reverse osmosis and hollow fiber nanofiltration membrane elements
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1.
Fig. 2 is a partial perspective sectional view of embodiment 1.
Fig. 3 is a cross-sectional view of fig. 1.
Fig. 4 is a schematic view of a structure with a separation flow guide net in embodiment 1.
Fig. 5 is a schematic view of the structure of a hollow fiber membrane in example 1.
Fig. 6 is a schematic structural view of a hollow fiber membrane in example 2.
FIG. 7 is a partial perspective sectional view of embodiment 3.
FIG. 8 is a schematic view of a core tube structure according to example 4.
FIG. 9 is a cross-sectional view of the center tube of example 4.
Fig. 10 is a combined assembly diagram of two hollow fiber membrane elements in example 4.
FIG. 11 is a schematic view of a core tube structure according to example 5.
FIG. 12 is a cross-sectional view of the center tube of example 5.
Fig. 13 is a schematic view of the structure of a bush in embodiment 5.
Fig. 14 is a sectional view of a bush in example 5.
Fig. 15 is a combined assembly diagram of two hollow fiber membrane elements in example 5.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
Example 1, as shown in fig. 1 to 3, the hollow fiber membrane element in this example includes a central tube 1 and a hollow fiber membrane disposed around the central tube 1, the central tube 1 has a hollow purified water outlet 1b and a side wall diversion hole 11, one end of the hollow fiber membrane is a water inlet end 1a, the other end is a concentrated water outlet end 1c, the hollow fiber membrane is a hollow fiber membrane sheet 2 formed by bonding a plurality of hollow fiber membrane filaments 21 arranged in parallel, one end of the hollow fiber membrane sheet 2 is closed to form a closed end, the other end is opened to form an open end, the open end of the hollow fiber membrane sheet 2 is adhered to and sealed with the side wall of the central tube 1, and is wound around the central tube 1 with the central tube 1 as a central axis, and a waterproof tape 5 is wound around the outside of the hollow fiber membrane.
The open end of the hollow fiber membrane 2 is sealed by adhering an inner layer adhesive tape 4 to the side wall of the central tube 1. As shown in fig. 4, the middle part of the hollow fiber membrane is provided with a separation flow guide net 3 for support. The periphery of the waterproof adhesive tape 5 is provided with a sealing retainer ring 6. The central tube 1 in this embodiment is closed at one end, and forms a purified water outlet 1b at the other end.
The manufacturing method comprises the following steps:
as shown in fig. 5, a plurality of hollow fiber membrane filaments 21 with a certain length are orderly arranged according to a certain distance to reach the width required by the membrane element, then an adhesive is coated on two ends of the hollow fiber membrane filaments 21 to form adhesive ends 22, and two ends of the hollow fiber membrane filaments 21 are fixedly connected; the bonding width of the adhesive coated on the two ends of the hollow fiber membrane filament 21 is 10 mm-30 mm, and the thickness of the adhesive layer is more than 0.5mm larger than the diameter of the hollow fiber membrane. The arrangement of the hollow fiber membrane filaments 21 and the adhesive application are preferably automated equipment, although manual operations may also be used.
And (3) plugging the central hole at one end of the hollow fiber membrane wire 21 by using an adhesive to form a closed end, and opening the central hole at the other end to form an open end to prepare the hollow fiber membrane 2.
The middle part of the hollow fiber membrane 2 is bonded with a separation flow guide net 3.
Coating an adhesive on the central tube 1, adhering the open end of the hollow fiber membrane 2 to the central tube 1, and sealing the central hole of the membrane wire and the diversion hole 11 of the central tube 1 by using an inner layer adhesive tape to form a sealed cavity; and then taking the central tube 1 as a central shaft, keeping the hollow fiber membrane 2 tensioned with a certain tension, winding the hollow fiber membrane 2 on the central tube 1 in order, and winding with the waterproof adhesive tape 5 after the winding is finished, so that the hollow fiber membrane 2 is fixed.
The sealing retainer ring 6 is assembled on the outer ring, and the sealing ring 13 is arranged on the central tube 1.
The embodiment can use the industrialization scheme and the automation equipment of the existing flat-plate roll type membrane element for reference so as to save the cost investment.
Example 2, as shown in fig. 6, example 2, the membrane element in this example was not provided with the separation flow guide net 3, and an adhesive was applied to the center of the hollow fiber membrane sheet 2 to form an adhesive section 23 for supporting the entire hollow fiber membrane sheet after winding. Other structures refer to example 1.
In example 3, as shown in fig. 7, the waterproof tape 5 of this example has an upper sealing end 7a at the upper end of its outer periphery and a lower sealing end 7b at the lower end. The periphery of the upper sealing end 7a and the lower sealing end 7b is sleeved with a sealing ring 71. Other structures refer to example 1.
Embodiment 4, as shown in fig. 8 to 10, the center tube 1 in this embodiment is hollow in the axial direction, and one end of the center tube forms a plug end 12, and the other end forms a socket end 13 for the plug end 12 to be inserted and fitted. The hollow fiber membrane element in this embodiment may be assembled in plural, and the plug end 12 of the adjacent center tube 1 is inserted into the socket end 13 of the adjacent center tube, i.e., the assembly is completed.
Example 5, as shown in fig. 11 to 15, the center tube 1 in this example is axially hollow, a plurality of hollow fiber membrane elements in this example may be assembled, and adjacent center tubes 1 may be connected together by a bushing 8, that is, the assembly is completed.
The embodiment can use the industrialization scheme and the automation equipment of the existing flat-plate roll type membrane element for reference so as to save the cost investment.
Claims (11)
1. A hollow fiber membrane element comprises a central tube (1) and a hollow fiber membrane arranged around the central tube (1), wherein the central tube (1) is provided with a hollow purified water outlet (1b) and a diversion hole (11) on the side wall, one end of the hollow fiber membrane is a water inlet end (1a), the other end of the hollow fiber membrane is a concentrated water outlet end (1c), it is characterized in that the hollow fiber membrane is a hollow fiber membrane (2) formed by parallelly arranging and bonding a plurality of hollow fiber membrane wires (21), one end of the hollow fiber membrane (2) is closed to form a closed end, the other end is opened to form an open end, the open end of the hollow fiber membrane (2) is adhered to the side wall of the central tube (1) and sealed, and the hollow fiber membrane is wound on the central pipe (1) by taking the central pipe (1) as a central shaft, and a waterproof adhesive tape (5) is wound on the outer side of the hollow fiber membrane.
2. The hollow fiber membrane element according to claim 1, characterized in that the open end of the hollow fiber membrane sheet (2) is sealed by adhering an inner layer tape or solid glue to the side wall of the central tube (1).
3. The hollow fiber membrane element according to claim 1, characterized in that the middle of the hollow fiber membrane sheet (2) has an adhesive for support or the middle of the hollow fiber membrane is provided with a separation flow guide net (3) for support.
4. The hollow fiber membrane element according to claim 1, characterized in that the waterproof tape (5) is provided with a sealing collar (6) on the periphery.
5. The hollow fiber membrane element according to claim 1, characterized in that the waterproof tape (5) is provided at the upper end of the outer periphery thereof with an upper seal end (7a) and at the lower end thereof with a lower seal end (7 b).
6. Hollow fiber membrane element according to claim 1, characterized in that the central tube (1) is axially hollow and forms a plug end (12) at one end and a socket end (13) at the other end for the plug end (12) to be plugged into.
7. A method for producing a hollow fiber membrane element according to claim 1, characterized by comprising the steps of:
firstly, orderly arranging a plurality of hollow fiber membrane filaments (21) with certain lengths to the width required by a membrane element according to a certain distance, then coating an adhesive on two ends of the hollow fiber membrane filaments (21), and fixedly connecting two ends of the hollow fiber membrane filaments (21);
plugging a central hole at one end of the hollow fiber membrane wire (21) by using an adhesive to form a closed end, and opening a central hole at the other end to form an open end to prepare a hollow fiber membrane (2);
coating an adhesive on the central tube (1), adhering the open end of the hollow fiber membrane (2) to the central tube (1), and sealing the central hole of the membrane wire and the diversion hole (11) of the central tube (1) by using an inner layer adhesive tape or a solid adhesive to form a sealed cavity; and then taking the central tube (1) as a central shaft, keeping the hollow fiber membrane (2) tensioned with a certain tension, orderly winding the hollow fiber membrane (2) on the central tube (1), and winding with a waterproof adhesive tape (5) after the winding is finished, so that the hollow fiber membrane (2) is fixed.
8. The production method according to claim 7, characterized in that the middle of the hollow fiber membrane filaments (21) is coated with an adhesive to form an adhesive segment.
9. The production method according to claim 7, wherein the adhesive bonding width applied to both ends of the hollow fiber membrane filaments (21) is 10mm to 30mm, and the thickness of the adhesive layer is 0.5mm or more larger than the diameter of the hollow fiber membrane.
10. The production method according to claim 7, characterized in that a separation flow guide net (3) is bonded to the middle of the hollow fiber membrane (2) before the hollow fiber membrane (2) is wound around the central tube (1).
11. The method according to claim 7, wherein a sealing collar (6) or a sealing end is provided on the outer periphery of the waterproof tape (5) after the waterproof tape (5) is wound.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011194668.6A CN112516802A (en) | 2020-10-30 | 2020-10-30 | Hollow fiber membrane element and method for producing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011194668.6A CN112516802A (en) | 2020-10-30 | 2020-10-30 | Hollow fiber membrane element and method for producing same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112516802A true CN112516802A (en) | 2021-03-19 |
Family
ID=74979205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011194668.6A Pending CN112516802A (en) | 2020-10-30 | 2020-10-30 | Hollow fiber membrane element and method for producing same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112516802A (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2723430Y (en) * | 2004-05-14 | 2005-09-07 | 吴文双 | Combined filter core sterilizing and virus killing water purifier |
| US20120234745A1 (en) * | 2011-03-16 | 2012-09-20 | Markel Corporation | Fluoropolymer hollow fiber membrane with fluoro-copolymer and fluoro-terpolymer bonded end portion(s) and method to fabricate |
| CN202778285U (en) * | 2012-08-09 | 2013-03-13 | 湖州森蓝环境工程有限公司 | Roll type hollow fiber membrane module |
| JP2014034019A (en) * | 2012-08-10 | 2014-02-24 | Ube Ind Ltd | Gas-separating membrane module |
| CN203803382U (en) * | 2014-04-23 | 2014-09-03 | 湖州森蓝环境工程有限公司 | Serial connection type cross flow membrane filter assembly |
| CN203802865U (en) * | 2014-04-27 | 2014-09-03 | 周平 | Bio-artificial liver reactor filled with composites and microcarriers |
| CN205598973U (en) * | 2015-12-25 | 2016-09-28 | 苏州信望膜技术有限公司 | Roll up formula hollow fiber and receive filter membrane subassembly |
| CN106621819A (en) * | 2016-12-21 | 2017-05-10 | 天津膜天膜科技股份有限公司 | Hollow fiber desalination membrane assembly and equipment |
| CN206240334U (en) * | 2016-08-31 | 2017-06-13 | 北京碧水源膜科技有限公司 | A kind of slit is aerated rolling hollow fiber uf membrane system |
| CN207871918U (en) * | 2017-09-30 | 2018-09-18 | 天津大学（青岛）海洋工程研究院有限公司 | A kind of electric regenerative membrane component |
| CN108816047A (en) * | 2018-06-25 | 2018-11-16 | 长春三真实业有限公司 | A kind of traditional Chinese medicine extraction reverse osmosis unit |
| CN109364760A (en) * | 2018-11-16 | 2019-02-22 | 华电水务膜分离科技（天津）有限公司 | A kind of takeup type hyperfiltration membrane assembly and preparation method thereof |
| CN208694727U (en) * | 2018-07-05 | 2019-04-05 | 上海浩泽净水科技发展有限公司 | A kind of side is into convection current reverse-osmosis membrane element and reverse osmosis membrane filt |
-
2020
- 2020-10-30 CN CN202011194668.6A patent/CN112516802A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2723430Y (en) * | 2004-05-14 | 2005-09-07 | 吴文双 | Combined filter core sterilizing and virus killing water purifier |
| US20120234745A1 (en) * | 2011-03-16 | 2012-09-20 | Markel Corporation | Fluoropolymer hollow fiber membrane with fluoro-copolymer and fluoro-terpolymer bonded end portion(s) and method to fabricate |
| CN202778285U (en) * | 2012-08-09 | 2013-03-13 | 湖州森蓝环境工程有限公司 | Roll type hollow fiber membrane module |
| JP2014034019A (en) * | 2012-08-10 | 2014-02-24 | Ube Ind Ltd | Gas-separating membrane module |
| CN203803382U (en) * | 2014-04-23 | 2014-09-03 | 湖州森蓝环境工程有限公司 | Serial connection type cross flow membrane filter assembly |
| CN203802865U (en) * | 2014-04-27 | 2014-09-03 | 周平 | Bio-artificial liver reactor filled with composites and microcarriers |
| CN205598973U (en) * | 2015-12-25 | 2016-09-28 | 苏州信望膜技术有限公司 | Roll up formula hollow fiber and receive filter membrane subassembly |
| CN206240334U (en) * | 2016-08-31 | 2017-06-13 | 北京碧水源膜科技有限公司 | A kind of slit is aerated rolling hollow fiber uf membrane system |
| CN106621819A (en) * | 2016-12-21 | 2017-05-10 | 天津膜天膜科技股份有限公司 | Hollow fiber desalination membrane assembly and equipment |
| CN207871918U (en) * | 2017-09-30 | 2018-09-18 | 天津大学（青岛）海洋工程研究院有限公司 | A kind of electric regenerative membrane component |
| CN108816047A (en) * | 2018-06-25 | 2018-11-16 | 长春三真实业有限公司 | A kind of traditional Chinese medicine extraction reverse osmosis unit |
| CN208694727U (en) * | 2018-07-05 | 2019-04-05 | 上海浩泽净水科技发展有限公司 | A kind of side is into convection current reverse-osmosis membrane element and reverse osmosis membrane filt |
| CN109364760A (en) * | 2018-11-16 | 2019-02-22 | 华电水务膜分离科技（天津）有限公司 | A kind of takeup type hyperfiltration membrane assembly and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 王奇 等: "膜间距对中空纤维膜生物反应器传质特性的影响", 《广东化工》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4031012A (en) | Separatory apparatus | |
| EP2686090B1 (en) | Method of producing a ptfe hollow fiber membrane module with a fluorinated polymer potting | |
| US10967330B2 (en) | Central tube component of filter element and manufacturing method thereof | |
| CN111389230B (en) | Packaging method of hollow fiber membrane filter element | |
| US20010035374A1 (en) | Hollow fiber separation membrane element, hollow fiber separation membrane module, and process for producing the same | |
| JPS5898104A (en) | Multiple flow path diffusion device | |
| CN206843143U (en) | A kind of counterflow-preventing reverse osmosis membrane assembly | |
| CN112516802A (en) | Hollow fiber membrane element and method for producing same | |
| CN112546874B (en) | Method for manufacturing hollow fiber membrane element | |
| CN112546869B (en) | Method for manufacturing hollow fiber membrane element | |
| CN210915441U (en) | Multistage reverse osmosis filtering component | |
| CN213885712U (en) | Hollow fiber curtain type diaphragm and membrane element | |
| CN111359444A (en) | Hollow fiber membrane filter element and packaging method thereof | |
| CN112337311B (en) | Hollow fiber curtain type membrane, membrane element and manufacturing method thereof | |
| CN112516800B (en) | Method for manufacturing hollow fiber membrane element | |
| CN112915795A (en) | External pressure type hollow fiber curtain type diaphragm and preparation method thereof | |
| JP3130075B2 (en) | Method for manufacturing porous yarn membrane module and jig for manufacturing porous yarn membrane module | |
| CN112516801A (en) | Hollow fiber membrane element and method for producing same | |
| CN111632497A (en) | Butterfly sheet type filter element | |
| JP4070002B2 (en) | Spiral type membrane element and manufacturing method thereof | |
| CN207929012U (en) | A kind of wound fil-tration membrane module | |
| CN209663045U (en) | A kind of open ultra-thin filter cartridge construction | |
| CN212663236U (en) | Butterfly sheet type filter element | |
| US20030121842A1 (en) | Encapsulated filter unit, system and method for filtering fluids | |
| CN109821298B (en) | Method for manufacturing RO (reverse osmosis) membrane filter element |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210319 |
|
| RJ01 | Rejection of invention patent application after publication |