CN105013353A - Apparatus for preparing in-situ embedded enhanced hollow composite membrane - Google Patents
Apparatus for preparing in-situ embedded enhanced hollow composite membrane Download PDFInfo
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- CN105013353A CN105013353A CN201510443024.9A CN201510443024A CN105013353A CN 105013353 A CN105013353 A CN 105013353A CN 201510443024 A CN201510443024 A CN 201510443024A CN 105013353 A CN105013353 A CN 105013353A
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- composite membrane
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- 239000012528 membrane Substances 0.000 title claims abstract description 60
- 239000002131 composite material Substances 0.000 title claims abstract description 36
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 18
- 238000000576 coating method Methods 0.000 claims abstract description 66
- 239000011248 coating agent Substances 0.000 claims abstract description 65
- 239000007788 liquid Substances 0.000 claims abstract description 60
- 239000000463 material Substances 0.000 claims abstract description 27
- 238000003466 welding Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 238000009730 filament winding Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010924 continuous production Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000000835 fiber Substances 0.000 description 16
- 239000012510 hollow fiber Substances 0.000 description 16
- 229920000642 polymer Polymers 0.000 description 13
- 238000000034 method Methods 0.000 description 11
- 238000000926 separation method Methods 0.000 description 9
- 238000002360 preparation method Methods 0.000 description 7
- 239000000758 substrate Substances 0.000 description 7
- 239000011247 coating layer Substances 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 239000012982 microporous membrane Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000009954 braiding Methods 0.000 description 2
- 230000001112 coagulating effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 239000002759 woven fabric Substances 0.000 description 2
- 101000916532 Rattus norvegicus Zinc finger and BTB domain-containing protein 38 Proteins 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920005597 polymer membrane Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to apparatuses for preparing an enhanced hollow composite membrane, and aims at providing an apparatus for preparing in-situ embedded enhanced hollow composite membrane. In the apparatus, a core rod is vertically suspended above a gel water-bath tank, and the end part of the core rod is connected with a core liquid pipe via a core-rod rotation connection part and a rotation joint; the core rod downwards successively passes through an ultrasonic welding device, a core-rod fixing device and a coating head; at least two yarn pay-off cylinder are respectively disposed at two sides of the upper part of the core rod; a coating material liquid dissolving tank is successively connected with a coating-material metering conveying device and the coating head via a pipeline; and a core liquid tank is successively connected with a core-liquid metering conveying device and the core liquid pipe via a pipeline. Compared with the prior art, the beneficial effects comprise that the apparatus used for preparing the in-situ embedded enhanced hollow composite membrane is capable of realizing continuous production and realizing industrialized production; the apparatus does not cause peeling phenomenon when being used for preparing the in-situ embedded enhanced hollow composite membrane; and an in-situ embedded network tubular enhanced base material can be generated, the cost is relatively low, and finally the membrane material cost is reduced.
Description
Technical Field
The invention belongs to the field of reinforced hollow composite membrane preparation devices, and relates to a position-embedded reinforced hollow composite membrane preparation device.
Background
Because the membrane wall of the polymer separation membrane is a porous structure with high porosity, the polymer separation membrane still has the defect of insufficient mechanical strength when applied to high-pressure fluid treatment or high-frequency vibration. In order to improve the mechanical strength of the hollow fiber polymer membrane, Canadian Zenon company (U.S. Pat. No.5,472,607, U.S. 2003/0098275A1, WO 00/78437A1) discloses a preparation technology of a composite polymer hollow fiber membrane for the first time, the polymer composite hollow fiber membrane prepared by the technology only has a thin polymer separation layer, the thickness of the polymer separation layer is 0.01-0.1 mm, and therefore the water flux of the obtained membrane is greatly increased, and the transmembrane pressure is greatly reduced. However, since the hollow fiber membrane is formed by merely compounding the polymer separation membrane on the outer surface of the fiber woven tube which is woven in advance, the binding ability between the polymer separation membrane and the fiber woven tube is not good, and the polymer separation membrane and the fiber woven tube are likely to fall off during the reverse cleaning of the membrane. Chinese patent CN100546702C discloses a composite membrane prepared by coating a casting solution on a capillary-shaped woven fabric, so that the coating solution penetrates into the woven fabric to improve the strength of the composite membrane. Chinese patents CN101357303B and CN102784566B disclose that a composite membrane is prepared by pre-modifying and coating a braided tube, and then coating a membrane preparation solution for the second time. Although the similar technology strengthens the binding force between the separation membrane and the fiber braided tube to a certain extent, the problem that the polymer separation membrane is separated from the fiber braided tube in the backwashing process of the composite hollow fiber microporous membrane is not thoroughly solved. The above-mentioned methods generally prepare tubular braided tubes first, and then coat the membrane casting solution to prepare the composite membrane, and the process gap is relatively complicated. The tubular braid is woven at a slower rate, perhaps 1/10, which is the rate at which composite films are made, requiring more braiding machines. In order to ensure the rigidity and roundness of the tubular braided fabric, a certain thickness of the braided fabric is required, the wall thickness of the composite membrane is increased correspondingly, the hollow fiber membrane has relatively high filling density and preferably has smaller outer diameter, so that the inner diameter of the composite membrane is correspondingly smaller, and the usable length of the hollow fiber membrane in the packaging membrane module is limited. In addition, the tubular braided fabric has high raw material and manufacturing cost, and the cost of the composite membrane is increased.
Chinese patent CN101543731B discloses a method for preparing a fiber braided tube embedded reinforced polymer hollow fiber microporous membrane, which adopts a fiber braiding-co-extrusion integrated film forming process, namely fixing a core liquid tube in the middle of the braided tube, braiding a fiber bundle into a fiber braided tube along the core liquid tube, co-extruding a casting film liquid, the core liquid and the fiber braided tube through an extrusion die, and preparing the fiber braided tube embedded reinforced polymer hollow fiber microporous membrane through a phase transition method. The method successfully embeds the fiber braided tube into the body of the hollow fiber membrane, introduces the core liquid into the inner cavity of the braided tube and effectively controls the inner diameter of the hollow fiber membrane, thereby solving the technical problems that a polymer layer and the braided fiber tube are easy to separate, the inner cavity of the hollow fiber is easy to block and the like in the fiber braided tube reinforced hollow fiber membrane prepared by the traditional coating process. Chinese patents CN100393397C and CN101837248B disclose that a hollow fiber membrane is prepared first, and then a fiber net is wound on the outer surface of the hollow fiber membrane or a fiber yarn is adhered to the outer surface of the hollow fiber membrane to be coated with a membrane preparation solution for the second time to prepare a composite membrane.
Disclosure of Invention
The invention aims to solve the technical problems of insufficient peel strength, difficult industrial production and higher membrane material cost of the composite membrane in the prior art and provides a device for preparing an in-situ embedded reinforced hollow composite membrane.
In order to solve the technical problem, the solution of the invention is as follows:
the device for preparing the in-situ embedded reinforced hollow composite membrane comprises a gel water bath, a filament winding machine, a coating system, a yarn paying-off device and a feed liquid conveying system; wherein,
the coating system comprises a core rod, an ultrasonic welding device, a core rod fixing device and a coating head; the core rod is vertically suspended above the gel water bath, the upper end part of the core rod is connected with the core liquid pipe through a core rod rotary connecting piece and a rotary joint, and the core rod rotary connecting piece is connected with a rotary system; the core rod downwards sequentially passes through the ultrasonic welding device, the core rod fixing device and the coating head;
the yarn paying-off device comprises yarn paying-off barrels and a yarn paying-off rotating system, wherein each group of yarn paying-off devices is provided with at least 2 yarn paying-off barrels and are respectively arranged on two sides of the upper part of the core rod;
the feed liquid conveying system comprises a coating feed liquid dissolving tank and a core liquid tank, the tank bottom of the coating feed liquid dissolving tank is sequentially connected with a coating material metering and conveying device and a coating head through pipelines, and the tank bottom of the core liquid tank is sequentially connected with a core liquid metering and conveying device and a core liquid pipe through pipelines.
In the invention, the number of the yarn paying-off devices is 1-8.
In the invention, the coating head is of a hollow structure, and the inner space of the coating head is connected with an output pipeline of a coating material metering and conveying device; the core rod passes through the inner space of the coating head from top to bottom.
In the invention, the distance between the mandrel fixing device and the mandrel is kept, so that the mandrel can rotate around the axis while being fixed.
In the invention, the ultrasonic welding device comprises an ultrasonic generator and an ultrasonic welding head.
In the invention, the core rod is a stainless steel hollow tube or solid tube, the outer diameter of the core rod is 1.5-12 mm, and preferably the diameter of the core rod is larger than 3 mm.
In the invention, the thread-shaped grooves are uniformly distributed on the outer surface of the upper end of the core rod to serve as yarn guide grooves, and the purpose of the arrangement is that a plurality of strands of yarns are flatly and crossly wound on the rotating core rod along the guide grooves.
Compared with the prior art, the invention has the beneficial effects that:
(1) the device is used for preparing the in-situ embedded reinforced hollow composite membrane, can realize continuous production and can realize industrial production;
(2) the device of the invention is used for preparing the in-situ embedded reinforced hollow composite membrane without stripping phenomenon, and overcomes the defect of insufficient anti-stripping strength of the composite membrane in the prior art;
(3) when the device is used for preparing the in-situ embedded reinforced hollow composite membrane, the in-situ embedded network tubular reinforced base material can be generated, the cost is low, and the cost of the membrane material can be finally reduced.
Drawings
FIG. 1 is a schematic view of a process flow of an in-situ embedded reinforced hollow composite membrane preparation device.
FIG. 2 is a schematic diagram of a method for preparing an in-situ embedded reinforced hollow composite membrane.
In the figure: the device comprises a coating material dissolving tank 1, a coating material metering and conveying device 2, a coating material 21, a yarn pay-off device 3, a yarn pay-off barrel 31, a yarn pay-off rotating system 32, a core liquid tank 4, a core liquid metering and conveying device 5, a core liquid pipe 51, a core rod 6, a core rod rotating device 7, a rotating system 71, a core rod rotating connecting piece 72, a rotating joint 8, an ultrasonic welding device 9, an ultrasonic generator 91, an ultrasonic welding joint 92, a core rod fixing device 10, a coating head 11, a gel water bath 12, a wire winding machine 13 and a reinforced hollow composite membrane 14.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The device for preparing the in-situ embedded reinforced hollow composite membrane comprises a gel water bath 12, a filament winding machine 13, a coating system, a yarn paying-off device and a feed liquid conveying system; wherein,
the mandrel coating system comprises a mandrel 6, an ultrasonic welding device 9, a mandrel fixing device 10 and a coating head 11.
The core rod 6 is a stainless steel hollow tube or a solid tube, the outer diameter of the core rod is 1.5-12 mm, and the hollow tube is preferably larger than 3 mm. The outer surface of the upper end of the core rod 6 is uniformly distributed with thread-shaped grooves as yarn guide grooves, and the arrangement purpose of the thread-shaped grooves is that a plurality of strands of yarns are smoothly and crossly wound on the rotating core rod along the guide grooves.
The mandrel 6 is vertically suspended above the gel water bath 12, the upper end of the mandrel 6 is connected with the core liquid pipe 51 through a mandrel rotary connecting piece 72 and a rotary joint 8, and the mandrel rotary connecting piece 72 is connected with a rotary system 71.
The core rod 6 downwards sequentially passes through the ultrasonic welding device 9, the core rod fixing device 10 and the coating head 11; the ultrasonic welding apparatus 9 includes an ultrasonic generator 91 and an ultrasonic horn 92. The mandrel bar fixing device 10 is spaced from the mandrel bar 6 so that the mandrel bar 6 can be fixed and rotated around its own axis. The coating head 11 is of a hollow structure, and the inner space of the coating head is connected with an output pipeline of the coating material metering and conveying device 1; the core rod 6 passes through the inner space of the coating head 11 from top to bottom.
The yarn pay-off device comprises a yarn pay-off drum 31 and a yarn pay-off rotating system 32, and the number of the yarn pay-off devices can be 1-8 groups. Each group of yarn pay-off devices is provided with at least 2 yarn pay-off drums 31 which are respectively arranged at two sides of the upper part of the core rod 6;
the feed liquid conveying system comprises a coating feed liquid dissolving tank 1 and a core liquid tank 4, the tank bottom of the coating feed liquid dissolving tank 1 is connected to a coating head 11 through a pipeline and a coating material metering and conveying device 2, and the tank bottom of the core liquid tank 4 is connected to a core liquid pipe 51 through a pipeline and a core liquid metering and conveying device 5. The coating material metering and conveying device 2 and the core liquid metering and conveying device 5 can adopt metering pumps.
The realization principle of the invention is as follows:
after the core liquid is sent to the core liquid pipe 51 by the core liquid metering and conveying device 5, the core liquid flows downwards along the hollow interior of the core rod 6 through the rotary joint 8 and the core rod rotary connecting piece 72. The rotation system 71 carries the mandrel rotation connection 72, causing the mandrel 6 to rotate about its own axis (the mandrel pipe 51 and the rotary joint 8 are stationary). The yarns on the plurality of yarn pay-off drums 31 are flatly and crossly wound on the outer surface of the rotating mandrel, and the cross points of the yarns are welded and bonded by the ultrasonic welding device 9, so that the network tubular reinforcing base material is formed. The network tubular reinforcing base material which is welded before is dragged by the wire winding machine 13 to continuously descend along the core rod 6 and finally separated from the lower end part after being coated with the feed liquid. The coating solution is delivered to the coating head 11 by the coating solution metering delivery device 2 and fills the cavity of the same, as the network tubular reinforcing substrate continues through the coating head 11. The rotating core rod 6 is used as a scraper to scrape a coating layer with a certain thickness on the inner surface of the network tubular reinforced base material. Then, the core liquid and the inner surface of the coating layer are subjected to solvent phase exchange at the lower end portion of the mandrel bar 6 and solidified, and the outermost layer of the liquid enters the gel water bath 12 to continue exchange film formation.
When the outer diameter of the core rod 6 is larger than 3mm, the core rod 6 adopts a hollow tubular structure; introducing a core liquid curing process; when the outer diameter of the core rod 6 is less than 3mm, the core liquid curing process is not introduced, and only the coating material is used for wrapping the network tubular reinforcing base material.
Specific example 1:
8 denier 750 polyester composite yarns are respectively flatly and crossly wound on a stainless steel hollow core rod 6 with the outer diameter of 4mm through a rotary core rod guide groove, and the cross points are ultrasonically welded and bonded to form a network tubular base material. The web-like substrate is continuously fed into the coating head 11 by the traction (coating liquid is fed to the coating head 11 by means of a metering pump and fills the internal cavity thereof). The coating liquid permeates into the yarns and completely infiltrates the coated network tubular base material, the coated network tubular base material continuously leaves the coating head 11, the rotating core rod 6 serves as a scraper to scrape a coating layer with a certain thickness on the inner surface of the tubular base material, the core liquid flows out from the lower end part of the core rod 6 and exchanges solvents with the coating layer and is solidified, and the outer surface liquid enters a coagulating bath to exchange and form a film.
Specific example 2:
the 4 polyester composite yarns with the denier of 750 are respectively flatly and crossly wound on a stainless steel core bar 6 with the outer diameter of 1.5mm through a rotating core bar guide groove, and the cross points are ultrasonically welded and bonded to form a network tubular base material. The web-like substrate is continuously fed into the coating head 11 by the traction (coating liquid is fed to the coating head 11 by means of a metering pump and fills the internal cavity thereof). The coating liquid permeates into the yarns and completely infiltrates the coated network tubular substrate, the network tubular substrate coated by the coating liquid continuously leaves the coating head 11, and the substrate coated by the coating liquid enters the coagulating bath for exchange film formation.
The device is used for preparing the in-situ embedded reinforced hollow composite membrane, the network tubular substrate is formed in situ during the preparation of the composite membrane, and the prepared membrane has the average pore diameter of 0.01-1 micron, the inner diameter of 1-12 mm and the outer diameter of 1.6-20 mm. The hollow membrane with small inner diameter is used as external pressure, and core liquid is not adopted; the core liquid is used when the diameter is larger than 3mm, and the internal pressure is applied.
Claims (7)
1. A device for preparing an in-situ embedded reinforced hollow composite membrane comprises a gel water bath and a filament winding machine, and is characterized by also comprising a coating system, a yarn paying-off device and a feed liquid conveying system; wherein,
the coating system comprises a core rod, an ultrasonic welding device, a core rod fixing device and a coating head; the core rod is vertically suspended above the gel water bath, the upper end part of the core rod is connected with the core liquid pipe through a core rod rotary connecting piece and a rotary joint, and the core rod rotary connecting piece is connected with a rotary system; the core rod downwards sequentially passes through the ultrasonic welding device, the core rod fixing device and the coating head;
the yarn paying-off device comprises yarn paying-off barrels and a yarn paying-off rotating system, wherein each group of yarn paying-off devices is provided with at least 2 yarn paying-off barrels and are respectively arranged on two sides of the upper part of the core rod;
the feed liquid conveying system comprises a coating feed liquid dissolving tank and a core liquid tank, the tank bottom of the coating feed liquid dissolving tank is sequentially connected with a coating material metering and conveying device and a coating head through pipelines, and the tank bottom of the core liquid tank is sequentially connected with a core liquid metering and conveying device and a core liquid pipe through pipelines.
2. The device according to claim 1, characterized in that the number of yarn payoff devices is 1-8 groups.
3. The device of claim 1, wherein the coating head is a hollow structure, and the inner space of the coating head is connected with the output pipeline of the coating material metering and conveying device; the core rod passes through the inner space of the coating head from top to bottom.
4. The apparatus of claim 1, wherein the mandrel holder is spaced from the mandrel to allow the mandrel to rotate about the axis while being held.
5. The apparatus of claim 1, wherein the ultrasonic welding apparatus comprises an ultrasonic generator and an ultrasonic welding head.
6. The device according to claim 1, wherein the core rod is a stainless steel hollow tube or solid tube with an outer diameter of 1.5-12 mm.
7. The apparatus of claim 1, wherein the outer surface of the upper end of the mandrel is uniformly provided with thread-like grooves as yarn guide grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510443024.9A CN105013353B (en) | 2015-07-25 | 2015-07-25 | Apparatus for preparing in-situ embedded enhanced hollow composite membrane |
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| CN201510443024.9A CN105013353B (en) | 2015-07-25 | 2015-07-25 | Apparatus for preparing in-situ embedded enhanced hollow composite membrane |
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| CN105013353B CN105013353B (en) | 2017-04-12 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101543731A (en) * | 2009-03-23 | 2009-09-30 | 杭州洁弗膜技术有限公司 | Method for preparing fiber braided tube embedded enhanced type polymer hollow fiber microporous membrane |
| CN101837248A (en) * | 2010-06-24 | 2010-09-22 | 厦门绿邦膜技术有限公司 | Production method of cellosilk enhanced compound hollow fiber membrane |
| CN103007778A (en) * | 2012-12-20 | 2013-04-03 | 北京碧水源膜科技有限公司 | Preparation method and preparation device for enhanced hollow fiber composite film |
| JP2013173139A (en) * | 2013-04-09 | 2013-09-05 | Asahi Kasei Chemicals Corp | Manufacturing method of porous hollow fiber membrane |
| US20150136691A1 (en) * | 2011-12-13 | 2015-05-21 | MEMSTAR (Guangzhou) Co. Ltd | Method for preparing double layered porous hollow membrane and device and product thereof |
-
2015
- 2015-07-25 CN CN201510443024.9A patent/CN105013353B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101543731A (en) * | 2009-03-23 | 2009-09-30 | 杭州洁弗膜技术有限公司 | Method for preparing fiber braided tube embedded enhanced type polymer hollow fiber microporous membrane |
| CN101837248A (en) * | 2010-06-24 | 2010-09-22 | 厦门绿邦膜技术有限公司 | Production method of cellosilk enhanced compound hollow fiber membrane |
| US20150136691A1 (en) * | 2011-12-13 | 2015-05-21 | MEMSTAR (Guangzhou) Co. Ltd | Method for preparing double layered porous hollow membrane and device and product thereof |
| CN103007778A (en) * | 2012-12-20 | 2013-04-03 | 北京碧水源膜科技有限公司 | Preparation method and preparation device for enhanced hollow fiber composite film |
| JP2013173139A (en) * | 2013-04-09 | 2013-09-05 | Asahi Kasei Chemicals Corp | Manufacturing method of porous hollow fiber membrane |
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