CN111992054A - Variable-tension winding roller and method for processing non-equal-diameter hollow fiber membrane - Google Patents
Variable-tension winding roller and method for processing non-equal-diameter hollow fiber membrane Download PDFInfo
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- CN111992054A CN111992054A CN202011006656.6A CN202011006656A CN111992054A CN 111992054 A CN111992054 A CN 111992054A CN 202011006656 A CN202011006656 A CN 202011006656A CN 111992054 A CN111992054 A CN 111992054A
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- hollow fiber
- fiber membrane
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- 239000012528 membrane Substances 0.000 title claims abstract description 98
- 239000012510 hollow fiber Substances 0.000 title claims abstract description 73
- 238000004804 winding Methods 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000005266 casting Methods 0.000 claims abstract description 20
- 238000009987 spinning Methods 0.000 claims abstract description 19
- 238000004140 cleaning Methods 0.000 claims abstract description 10
- 230000001112 coagulating effect Effects 0.000 claims abstract description 5
- 239000007791 liquid phase Substances 0.000 claims abstract description 5
- 239000007790 solid phase Substances 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 9
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical group CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 9
- 239000002904 solvent Substances 0.000 claims description 9
- 239000000835 fiber Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 239000011159 matrix material Substances 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 6
- 229920000642 polymer Polymers 0.000 claims description 6
- 239000002861 polymer material Substances 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- WZCQRUWWHSTZEM-UHFFFAOYSA-N 1,3-phenylenediamine Chemical compound NC1=CC=CC(N)=C1 WZCQRUWWHSTZEM-UHFFFAOYSA-N 0.000 claims description 3
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 claims description 3
- 239000002033 PVDF binder Substances 0.000 claims description 3
- 239000004695 Polyether sulfone Substances 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 3
- 239000001110 calcium chloride Substances 0.000 claims description 3
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 230000001788 irregular Effects 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 230000000737 periodic effect Effects 0.000 claims description 3
- 229920002492 poly(sulfone) Polymers 0.000 claims description 3
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 3
- 229920006393 polyether sulfone Polymers 0.000 claims description 3
- -1 polyisophthaloyl Polymers 0.000 claims description 3
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 3
- 239000004800 polyvinyl chloride Substances 0.000 claims description 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 3
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 3
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 3
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 2
- 239000008213 purified water Substances 0.000 claims description 2
- DQWPFSLDHJDLRL-UHFFFAOYSA-N triethyl phosphate Chemical compound CCOP(=O)(OCC)OCC DQWPFSLDHJDLRL-UHFFFAOYSA-N 0.000 claims description 2
- 239000000243 solution Substances 0.000 description 18
- 230000010287 polarization Effects 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 239000012527 feed solution Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/08—Hollow fibre membranes
- B01D69/081—Hollow fibre membranes characterised by the fibre diameter
-
- 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
- B01D2323/00—Details relating to membrane preparation
- B01D2323/42—Details of membrane preparation apparatus
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to a variable-tension winding roller and a method for processing a non-equal-diameter hollow fiber membrane. The method for processing the non-isometric hollow fiber membrane comprises the following steps: preparing a casting solution; adding the casting solution into a hollow fiber membrane spinning machine for spinning, converting a liquid phase into a solid phase through an air bath, a coagulating bath and a cleaning bath, winding through a circular winding roller, and then winding through a winding roller body, wherein the spinning tension is periodically changed, so that the diameter of the hollow fiber membrane is periodically changed along the length direction of the hollow fiber membrane; and (6) slitting. According to the invention, the variable-tension winding roller body is used for periodically changing the spinning tension during spinning winding, so that the diameter of the hollow fiber membrane is periodically changed along the length direction, and further the non-isodiametric hollow fiber membrane is obtained, and the processing is more convenient and faster, and the efficiency is higher.
Description
Technical Field
The invention relates to the technical field of membrane separation assemblies, in particular to a variable-tension winding roller and a method for processing a non-equal-diameter hollow fiber membrane.
Background
In the use process of the traditional hollow fiber membrane, due to pressure loss, the pollution of the membrane at the front half section is more serious than that of the membrane at the rear half section, the high-efficiency utilization of the membrane at the rear half section cannot be realized, and the concentration polarization phenomenon is serious. In order to solve the problems, the invention provides the non-isodiametric hollow fiber membrane, which can relieve the problem of uneven membrane pollution, realize high-efficiency utilization of the latter half-section membrane, and is favorable for relieving the concentration polarization phenomenon in the cavity of the hollow fiber membrane, relieving membrane pollution, and prolonging the cleaning period and the service life of the hollow fiber membrane component.
In the method for producing a hollow fiber membrane having a non-uniform diameter, a winding roll is moved up and down by mechanical control, whereby the hollow fiber membrane having a non-uniform diameter can be produced.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provides a variable-tension winding roller and a method for processing a non-equal-diameter hollow fiber membrane.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a become tension winding up roller, includes the winding up roller body, the winding up roller body is the irregular shape that three or three more arc chimbs connect gradually the constitution, and every arc chimb intermediate position protrusion and both sides are about the intermediate position symmetric distribution.
In particular, all the arched convex edges constituting each winding roller body have the same shape.
The number of the arc convex edges of the winding roller body is three.
Particularly, when the number of the arc convex edges forming each winding roller body is even, the two opposite arc convex edges have the same shape and the same length, and the two adjacent arc convex edges have different shapes.
The number of the arc convex edges of the winding roller body is four.
A method for processing a non-isometric hollow fiber membrane by adopting the variable tension winding roller comprises the following specific steps:
s1 preparation of casting solution
Adding the membrane casting solution matrix into a polymer solvent, uniformly mixing, and filtering through a filter to obtain a membrane casting solution;
s2 preparation of non-isodiametric hollow fiber membrane
Adding the casting solution obtained in the step S1 into a feed solution kettle of a hollow fiber membrane spinning machine device by using a metering pump, standing and defoaming for 12h at the temperature of 80 ℃, introducing nitrogen into the feed solution kettle until the pressure in the kettle is kept at 0.4MPa, allowing the casting solution to enter a coagulating bath and a cleaning bath through an air bath, converting a liquid phase into a solid phase from the liquid phase, winding through a circular winding roller, and then winding through a winding roller body, wherein the spinning tension is periodically changed during spinning winding so that the diameter of the hollow fiber membrane is periodically changed along the length direction of the hollow fiber membrane;
s3, slitting
The periodically varying hollow fiber membrane produced in step S2 is cut into a non-uniform diameter fiber membrane having a large diameter at one end and a small diameter at the other end according to the periodic length.
In step S1, the casting solution matrix is prepared from one or more molding polymer materials, wherein the molding polymer material is one of polyvinylidene fluoride, polysulfone, polyethersulfone, polyvinyl chloride, polyacrylonitrile, polyvinylpyrrolidone, and polyisophthaloyl metaphenylene diamine.
In step S1, the polymer solvent is dimethylformamide, dimethylacetamide, glycerol, CaCl2And triethyl phosphate or a mixture of a plurality of solvents.
In step S2, the liquid in the coagulation bath or the cleaning bath is one of water, an acid solution, an alkali solution, and an organic solution.
The utility model provides an interior pressure type non-constant diameter hollow fiber membrane module, includes the hollow fiber membrane casing, hollow fiber membrane casing one end is equipped with the water inlet and the other end is equipped with concentrated water delivery port, be equipped with a plurality of water purification delivery port on the lateral wall of hollow fiber membrane casing, the bundles body that the non-constant diameter hollow fiber membrane is constituteed is packed in the hollow fiber membrane casing, the great one end of diameter that the non-constant diameter hollow fiber membrane bundles body is located water inlet one end and the less one end of diameter is located concentrated water delivery port one end.
The invention has the beneficial effects that: according to the invention, the variable-tension winding roller body is used for periodically changing the spinning tension during spinning winding, so that the diameter of the hollow fiber membrane is periodically changed along the length direction, and further the non-isodiametric hollow fiber membrane is obtained, and the processing is more convenient and faster, and the efficiency is higher.
Drawings
FIG. 1 is a schematic structural view of a winding roll body having three arcuate flanges;
FIG. 2 is a schematic structural view of a winding roller body having four identical arcuate flanges;
FIG. 3 is a schematic structural view of a winding roll body having four arc-shaped flanges, wherein two opposite arc-shaped flanges are identical in shape and two adjacent arc-shaped flanges are different in shape;
FIG. 4 is a drawing of an apparatus for processing a non-isometric hollow fiber membrane using a variable tension take-up roll;
FIG. 5 is a schematic view of a non-isometric hollow fiber membrane processed using a variable tension take-up roll;
FIG. 6 is a schematic structural view of an internal pressure type non-uniform diameter hollow fiber membrane module;
in the figure: 1-a winding roll body; 2-arc convex edge; 3-a filter; 4-a metering pump; 5-hollow fiber membrane spinning machine equipment; 6-coagulating bath; 7-cleaning bath; 8-round winding rolls;
the following detailed description will be made in conjunction with embodiments of the present invention with reference to the accompanying drawings.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
as shown in fig. 1 to 5, a variable tension winding roller comprises a winding roller body 1, wherein the winding roller body 1 is in an irregular shape formed by sequentially connecting three or more arc-shaped convex edges 2, the middle position of each arc-shaped convex edge 2 is convex, and two sides of each arc-shaped convex edge are symmetrically distributed about the middle position.
In particular, all the arched flanges 2 constituting each winding roller body 1 are identical in shape.
The number of the arc convex edges 2 of the winding roller body 1 is three.
Particularly, when the number of the arc-shaped convex edges 2 forming each winding roller body 1 is even, the two opposite arc-shaped convex edges 2 have the same shape and the same length, and the two adjacent arc-shaped convex edges 2 have different shapes.
The number of the arc convex edges 2 of the winding roller body 1 is four.
A method for processing a non-isometric hollow fiber membrane by adopting the variable tension winding roller comprises the following specific steps:
s1 preparation of casting solution
Adding the membrane casting solution matrix into a polymer solvent, uniformly mixing, and filtering through a filter 3 to obtain a membrane casting solution;
s2 preparation of non-isodiametric hollow fiber membrane
Adding the casting solution obtained in the step S1 into a feed liquid kettle of a hollow fiber membrane spinning machine device 5 by using a metering pump 4, standing and defoaming for 12h at 80 ℃, introducing nitrogen into the feed liquid kettle until the pressure in the kettle is kept at 0.4MPa, allowing the casting solution to pass through an air bath, enter a coagulating bath 6 and a cleaning bath 7, converting a liquid phase into a solid phase, winding by using a circular winding roller 8, winding by using a winding roller body 1, and periodically changing the spinning tension during spinning winding so that the diameter of the hollow fiber membrane periodically changes along the length direction of the hollow fiber membrane;
s3, slitting
The periodically varying hollow fiber membrane produced in step S2 is cut into a non-uniform diameter fiber membrane having a large diameter at one end and a small diameter at the other end according to the periodic length.
In step S1, the casting solution matrix is prepared from one or more molding polymer materials, wherein the molding polymer material is one of polyvinylidene fluoride, polysulfone, polyethersulfone, polyvinyl chloride, polyacrylonitrile, polyvinylpyrrolidone, and polyisophthaloyl metaphenylene diamine.
In step S1, the polymer solvent is dimethylformamide, dimethylacetamide, glycerol, CaCl2One or more of triethyl phosphateA mixture of solvents.
In step S2, the liquid in the coagulation bath 6 and the cleaning bath 7 is one of water, an acid solution, an alkali solution, and an organic solution.
In the invention, if all the arc-shaped flanges 2 forming each winding roller body 1 are the same as each other, as shown in fig. 1 and fig. 2, the non-equal-diameter fiber membranes with the same type and the same length can be conveniently processed, at this time, the length of each arc-shaped flange 2 only needs to be controlled to be twice of the length of the non-equal-diameter fiber membrane to be processed, and if the side length of each winding roller body 1 is n, the winding roller body 1 rotates for one circle, and then 2n non-equal-diameter fiber membranes with the same length can be produced.
In the invention, if the two adjacent arc-shaped convex edges 2 forming each winding roller body 1 are different in shape and the two opposite arc-shaped convex edges 2 are the same as each other, as shown in fig. 3, the non-equal-diameter fiber membranes with various types and different lengths can be processed, so that each two opposite arc-shaped convex edges 2 can produce the non-equal-diameter fiber membranes with the same type, and reasonable slitting is realized through reasonable program design during slitting.
The internal pressure type non-isometric hollow fiber membrane module comprises a hollow fiber membrane shell, wherein one end of the hollow fiber membrane shell is provided with a water inlet, the other end of the hollow fiber membrane shell is provided with a concentrated water outlet, the side wall of the hollow fiber membrane shell is provided with a plurality of purified water outlets, a bundle body formed by non-isometric hollow fiber membranes is sealed in the hollow fiber membrane shell, and the larger diameter end of the non-isometric hollow fiber membrane bundle body is located at one end of the water inlet while the smaller diameter end of the non-isometric hollow fiber membrane bundle body is located at one end of the concentrated water outlet.
According to the invention, the variable-tension winding roller body 1 is used for periodically changing the spinning tension during spinning winding, so that the diameter of the hollow fiber membrane is periodically changed along the length direction, and further the non-isodiametric hollow fiber membrane is obtained, and the processing is more convenient and faster, and the efficiency is higher. The non-isometric hollow fiber membrane is applied to a membrane component device, the problem of uneven membrane pollution can be relieved, the rear half-section membrane is efficiently utilized, the phenomenon of concentration polarization in the cavity of the hollow fiber membrane is relieved, the membrane pollution is reduced, and the cleaning period and the service life of the hollow fiber membrane component are prolonged.
The invention has been described in connection with the accompanying drawings, it is to be understood that the invention is not limited to the specific embodiments disclosed, but is intended to cover various modifications, adaptations or uses of the invention, and all such modifications and variations are within the scope of the invention.
Claims (10)
1. The utility model provides a become tension winding up roller, its characterized in that includes winding up roller body (1), winding up roller body (1) is the irregular shape that three or more than three arc chimb (2) connect gradually and constitute, and every arc chimb (2) intermediate position protrusion and both sides are about the intermediate position symmetric distribution.
2. A variable tension winding roller according to claim 1, characterized in that all the arched convex edges (2) constituting each winding roller body (1) are identical in shape.
3. A variable tension winding roller according to claim 2, characterized in that the number of the curved flanges (2) of the winding roller body (1) is three.
4. A variable tension winding roller according to claim 1, characterized in that when the number of the arc-shaped flanges (2) constituting each winding roller body (1) is even, two opposite arc-shaped flanges (2) have the same shape and the same length, and two adjacent arc-shaped flanges (2) have different shapes.
5. A variable tension winding roller according to claim 4, characterized in that the number of the curved flanges (2) of the winding roller body (1) is four.
6. A method for processing a non-uniform-diameter hollow fiber membrane by using the variable-tension winding roller as claimed in any one of claims 1 to 5 is characterized by comprising the following specific steps:
s1 preparation of casting solution
Adding the membrane casting solution matrix into a polymer solvent, uniformly mixing, and filtering through a filter (3) to obtain a membrane casting solution;
s2 preparation of non-isodiametric hollow fiber membrane
Adding the casting solution obtained in the step S1 into a feed liquid kettle of a hollow fiber membrane spinning machine device (5) by a metering pump (4), standing and defoaming for 12h at 80 ℃, introducing nitrogen into the feed liquid kettle until the pressure in the kettle is kept at 0.4MPa, introducing the casting solution into a coagulating bath (6) and a cleaning bath (7) through an air bath, converting a liquid phase into a solid phase, winding through a circular winding roller (8), and then winding through a winding roller body (1), wherein the spinning tension is periodically changed during spinning winding so that the diameter of the hollow fiber membrane is periodically changed along the length direction of the hollow fiber membrane;
s3, slitting
The periodically varying hollow fiber membrane produced in step S2 is cut into a non-uniform diameter fiber membrane having a large diameter at one end and a small diameter at the other end according to the periodic length.
7. The method for processing the hollow fiber membrane with the unequal diameter by the variable-tension winding roller according to claim 6, wherein in step S1, the casting solution matrix is prepared by one or more molding polymer materials, wherein the molding polymer material is one of polyvinylidene fluoride, polysulfone, polyethersulfone, polyvinyl chloride, polyacrylonitrile, polyvinyl pyrrolidone and polyisophthaloyl metaphenylene diamine.
8. The method of claim 7, wherein in step S1, the polymer solvent is dimethylformamide, dimethylacetamide, glycerol, CaCl2And triethyl phosphate or a mixture of a plurality of solvents.
9. The method for processing hollow fiber membrane with unequal diameters by using the variable tension winding roll according to claim 8, wherein in step S2, the liquid in the coagulating bath (6) and the cleaning bath (7) is one of water, acid solution, alkali solution and organic solution.
10. The internal pressure type non-isometric hollow fiber membrane module is characterized by comprising a hollow fiber membrane shell, wherein one end of the hollow fiber membrane shell is provided with a water inlet, the other end of the hollow fiber membrane shell is provided with a concentrated water outlet, the side wall of the hollow fiber membrane shell is provided with a plurality of purified water outlets, a bundle body formed by non-isometric hollow fiber membranes is sealed in the hollow fiber membrane shell, and the larger diameter end of the non-isometric hollow fiber membrane bundle body is located at one end of the water inlet and the smaller diameter end of the non-isometric hollow fiber membrane bundle body is located at one end of the concentrated water outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011006656.6A CN111992054A (en) | 2020-09-23 | 2020-09-23 | Variable-tension winding roller and method for processing non-equal-diameter hollow fiber membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011006656.6A CN111992054A (en) | 2020-09-23 | 2020-09-23 | Variable-tension winding roller and method for processing non-equal-diameter hollow fiber membrane |
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| Publication Number | Publication Date |
|---|---|
| CN111992054A true CN111992054A (en) | 2020-11-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011006656.6A Pending CN111992054A (en) | 2020-09-23 | 2020-09-23 | Variable-tension winding roller and method for processing non-equal-diameter hollow fiber membrane |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57167704A (en) * | 1980-12-27 | 1982-10-15 | Akzo Nv | Hollow fiber type permeable membrane and its manufacture |
| JP2008036635A (en) * | 2001-03-06 | 2008-02-21 | Asahi Kasei Chemicals Corp | Method of manufacturing hollow fiber membrane |
| CN102151489A (en) * | 2011-03-21 | 2011-08-17 | 凌雪萍 | Multi-core hollow fiber porous membrane and preparation method thereof |
| CN102309929A (en) * | 2010-06-30 | 2012-01-11 | 吕晓龙 | Different-diameter hollow fiber membrane and preparation method thereof |
| CN103263857A (en) * | 2013-05-16 | 2013-08-28 | 天津工业大学 | Device for preparing fiber-reinforced hollow fiber membrane |
| CN103933867A (en) * | 2014-04-17 | 2014-07-23 | 哈尔滨工程大学 | Preparation method of PVC (polyvinyl chloride) hollow fiber film with antibacterial performance |
| WO2016021322A1 (en) * | 2014-08-06 | 2016-02-11 | テルモ株式会社 | Method for producing hollow-fiber membrane bundle |
| CN106413866A (en) * | 2014-05-08 | 2017-02-15 | 东丽株式会社 | Hollow fiber membrane module and manufacturing method thereof |
| CN110844707A (en) * | 2018-08-21 | 2020-02-28 | 宁波方太厨具有限公司 | Winding speed control device suitable for spinning |
-
2020
- 2020-09-23 CN CN202011006656.6A patent/CN111992054A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57167704A (en) * | 1980-12-27 | 1982-10-15 | Akzo Nv | Hollow fiber type permeable membrane and its manufacture |
| JP2008036635A (en) * | 2001-03-06 | 2008-02-21 | Asahi Kasei Chemicals Corp | Method of manufacturing hollow fiber membrane |
| CN102309929A (en) * | 2010-06-30 | 2012-01-11 | 吕晓龙 | Different-diameter hollow fiber membrane and preparation method thereof |
| CN102151489A (en) * | 2011-03-21 | 2011-08-17 | 凌雪萍 | Multi-core hollow fiber porous membrane and preparation method thereof |
| CN103263857A (en) * | 2013-05-16 | 2013-08-28 | 天津工业大学 | Device for preparing fiber-reinforced hollow fiber membrane |
| CN103933867A (en) * | 2014-04-17 | 2014-07-23 | 哈尔滨工程大学 | Preparation method of PVC (polyvinyl chloride) hollow fiber film with antibacterial performance |
| CN106413866A (en) * | 2014-05-08 | 2017-02-15 | 东丽株式会社 | Hollow fiber membrane module and manufacturing method thereof |
| WO2016021322A1 (en) * | 2014-08-06 | 2016-02-11 | テルモ株式会社 | Method for producing hollow-fiber membrane bundle |
| CN110844707A (en) * | 2018-08-21 | 2020-02-28 | 宁波方太厨具有限公司 | Winding speed control device suitable for spinning |
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