CN111659259A - Reinforced non-woven fabric tube and application thereof in tubular membrane - Google Patents
Reinforced non-woven fabric tube and application thereof in tubular membrane Download PDFInfo
- Publication number
- CN111659259A CN111659259A CN202010634092.4A CN202010634092A CN111659259A CN 111659259 A CN111659259 A CN 111659259A CN 202010634092 A CN202010634092 A CN 202010634092A CN 111659259 A CN111659259 A CN 111659259A
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- Prior art keywords
- tubular membrane
- woven fabric
- fastening device
- resistant
- shell
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- 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
- B01D63/06—Tubular membrane modules
- B01D63/062—Tubular membrane modules with membranes on a surface of a support tube
- B01D63/063—Tubular membrane modules with membranes on a surface of a support tube on the inner surface thereof
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- 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
- B01D63/06—Tubular membrane modules
- B01D63/061—Manufacturing thereof
-
- 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
- B01D69/02—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor characterised by their properties
-
- 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
- B01D69/10—Supported membranes; Membrane supports
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/30—Chemical resistance
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a reinforced non-woven fabric tube and application thereof in a tubular membrane. The reinforced non-woven fabric pipe consists of a non-woven fabric inner layer and a PE reinforcing layer, wherein the inner layer is made of PP; the thickness of the PE reinforcing layer is 0.2-0.4mm, and fine pore belts and non-pore belts are distributed at intervals, wherein the width of each fine pore belt is 9.5-22.5 mm; the width of the non-porous belt is 4-6 mm. The transverse spacing of the fine holes of the fine hole belt is 1.2-3mm, the longitudinal spacing is 4-8mm, and the hole diameter is 0.8-1.5 mm. The reinforced non-woven fabric tube and the components thereof solve the problem that the existing organic tubular membrane is not acid and alkali resistant.
Description
Technical Field
The invention belongs to the technical field of polymer separation membranes, and particularly relates to a reinforced non-woven fabric tube and application thereof in a tubular membrane.
Background
The tubular membrane generally comprises a casting membrane liquid layer and a non-woven fabric layer, wherein the casting membrane liquid layer plays a role in separation, and the non-woven fabric layer plays a role in support, so that the compressive strength, the tensile strength, the temperature resistance and the alkali resistance of the tubular membrane are mainly determined by the non-woven fabric layer.
Most of the non-woven fabrics of the existing commercially available tubular membranes are polyester materials, and the polyester materials are not acid-base resistant and can be hydrolyzed in acid-base environments through chemical property analysis, so that the compressive strength and the tensile strength of the tubular membranes are sharply reduced, the tubular membranes lose supporting force, a cast membrane liquid layer almost has no strength, the cast membrane liquid layer is broken quickly under the action of water pressure, and finally the tubular membranes lose filtering effect. Therefore, in some special industries, such as strong acid and strong alkali fields, the application of polyester tubular membranes is limited.
The polypropylene material is acid-resistant and alkali-resistant in chemical property analysis, but the non-woven fabric made of the material is too soft and has insufficient strength, so that the thickness of the non-woven fabric can only be increased for improving the strength; however, as the thickness of the nonwoven fabric increases, the liquid filtration resistance also increases greatly.
Disclosure of Invention
The invention provides a reinforced non-woven fabric tube and application thereof in a tubular membrane, aiming at solving the problem that the existing organic tubular membrane is not acid-base resistant.
The reinforced non-woven fabric tube consists of a non-woven fabric inner layer and a PE reinforcing layer,
the inner layer non-woven fabric is made of PP;
the thickness of the PE reinforcing layer is 0.2-0.4mm, and fine pore belts and non-pore belts are distributed at intervals, wherein the width of each fine pore belt is 9.5-22.5 mm; the width of the non-porous belt is 4-6 mm.
The transverse spacing of the fine holes of the fine hole belt is 1.2-3mm, the longitudinal spacing is 4-8mm, and the hole diameter is 0.8-1.5 mm.
The preparation method of the reinforced non-woven fabric pipe comprises the steps that inner-layer non-woven fabric is wound on a central shaft and is wound into a tubular shape, strip PE is wound into a tubular shape by abutting against the outer surface of the inner-layer non-woven fabric, and the position of a non-porous belt of the strip PE is welded by an ultrasonic welding head; and obtaining a reinforced non-woven fabric tube, and driving the reinforced non-woven fabric tube to rotate by a driving wheel so as to uniformly coat the membrane casting solution on the non-woven fabric tube.
The two sides of the strip PE are provided with non-porous belts, the width of the non-porous belt on each side is 2-3mm, the middle of the two sides is provided with a fine pore belt, and the non-porous belt parts are overlapped and welded together through ultrasonic waves in the winding process.
The reinforced non-woven fabric tube is applied to preparing an alkali-resistant tubular membrane element capable of treating acid-base wastewater and an assembly thereof.
And the alkali-resistant tubular membrane element is obtained by applying the reinforced non-woven fabric tube, coating a casting solution in the tube and solidifying.
The alkali-resistant tubular membrane component consists of tubular membrane elements which are tightly stacked, a diversion trench, a fastening device and a shell;
the fastening device is an elastic net or elastic cloth, and a tubular membrane element tightly stacked is sleeved in the fastening device;
the two diversion trenches are inserted into the cylindrical fastening device, abut against the fastening device, are uniformly distributed and have outward openings;
the tightly stacked tubular membrane elements and the peripheral diversion trenches are integrated into a bundle, so that the fastening device is cylindrical;
the cylindrical fastening device is sleeved in the shell, two ends of the shell are provided with openings, one side of the shell is provided with an opening, and the opening on one side is over against the opening of the diversion trench;
the shell can be made of glass fiber reinforced plastics or CPVC;
the two ends of the shell are sealed and fixed with the tubular membrane element through alkali-resistant and high-temperature-resistant sealant, and the opening of the tubular membrane element is smooth and unsealed.
The alkali-resistant tubular membrane component is simple and stable in structure, easy to assemble and high in water treatment efficiency.
The diameter of the alkali-resistant tubular membrane component can be 4 inches, 6 inches, 8 inches or 10 inches.
Drawings
FIG. 1: schematic representation of nonwoven and PE tapes.
FIG. 2: and (3) schematically welding the reinforced non-woven fabric tube.
In the figure, 1 is non-woven fabric, 2 is strip PE, 3 is a driving wheel, 4 is an upper welding head, 5 is a lower welding head, and 6 is a central shaft.
Detailed Description
The first embodiment is as follows: 10-inch 3-meter 6-mm alkali-resistant tubular membrane component
Taking a PP non-woven fabric with the width of 13.5mm, taking a PE belt with the width of 13.5mm, wherein round holes with the diameter of 0.8mm are densely distributed on the rest PE belt, the transverse distance of the round holes is 1.2mm, and the longitudinal distance of the round holes is 4 mm. The method comprises the following steps of taking PP non-woven fabric as an inner layer, taking a PE belt as an outer layer, welding the two layers by adopting an ultrasonic welding machine, coating a casting film liquid on the inner layer by adopting a special film coating tool, automatically cutting off a pipe when the length of the pipe reaches 3m, and then enabling the pipe to enter a coagulation bath water tank to finish phase conversion reaction to form a tubular film product.
Selecting an elastic net with the width of 300mm, taking 850 tubular membranes with the length of 3 meters and 2 diversion trenches with the diameter of 75mm, fixing the tubular membranes and the diversion trenches by the elastic net to form a cylinder, plugging the cylinder into a 10-inch glass fiber reinforced plastic membrane shell, plugging two ends of each tubular membrane by 1700 plugs, sealing the glass fiber reinforced plastic membrane shell by a special tool, pouring 1200g of epoxy resin which is uniformly stirred from a permeation liquid port of the membrane shell, turning over the glass fiber reinforced plastic membrane shell after curing for 24h, pouring 1200g of epoxy resin which is uniformly stirred from another permeation liquid port, and curing for 24 h. And (3) taking down the special membrane on the glass fiber reinforced plastic membrane shell, and then taking down 1700 plugs to form the 10-inch 3-meter 6-mm alkali-resistant tubular membrane component.
The second embodiment: 4-inch 4-meter 12.7mm alkali-resistant tubular membrane component
Taking a PP non-woven fabric with the width of 24.5mm, then taking a PE belt with the width of 24.5mm, wherein round holes are not arranged at the edge of the PE belt with 3mm, round holes with the diameter of 1.5mm are densely distributed on the rest PE belt, the transverse distance of the round holes is 3mm, and the longitudinal distance of the round holes is 8 mm. The method comprises the following steps of taking PP non-woven fabric as an inner layer, taking a PE belt as an outer layer, welding the two layers by adopting an ultrasonic welding machine, coating a casting film liquid on the inner layer by adopting a special film coating tool, automatically cutting off a pipe when the length of the pipe reaches 4 meters, and then enabling the pipe to enter a coagulation bath water tank to finish phase conversion reaction to form a tubular film product.
Selecting an elastic net with the width of 100mm, taking 37 tubular membranes with the length of 4 meters and guide grooves with the length of 2 phi 25mm, fixing the tubular membranes and the guide grooves by using the elastic net to form a cylinder, plugging the cylinder into a CPVC shell with 4 inches, plugging two ends of each tubular membrane by using 74 plugs, sealing the CPVC shell by using a special tool, pouring 150g of epoxy resin which is uniformly stirred from a permeation liquid port of the membrane shell, turning over the CPVC shell after curing for 24 hours, pouring 150kg of epoxy resin which is uniformly stirred from the other permeation liquid port, and curing for 24 hours. And (3) taking down the special film on the CPVC film shell, and then taking down 74 plugs to form the 4-inch 4-meter 12.7mm alkali-resistant tubular film component.
Claims (8)
1. A reinforced non-woven fabric tube is characterized by consisting of an inner non-woven fabric layer and a PE reinforcing layer,
the inner layer non-woven fabric is made of PP;
the thickness of the PE reinforcing layer is 0.2-0.4mm, and fine pore belts and non-pore belts are distributed at intervals, wherein the width of each fine pore belt is 9.5-22.5 mm; the width of the non-porous belt is 4-6 mm;
the transverse spacing of the fine holes of the fine hole belt is 1.2-3mm, the longitudinal spacing is 2-3mm, and the hole diameter is 0.8-1.5 mm.
2. The method of manufacturing a reinforced nonwoven fabric tube according to claim 1, wherein the inner layer nonwoven fabric is wound in a tubular shape, the PE strip is wound in a tubular shape on the outer surface of the inner layer nonwoven fabric, and the non-porous position of the PE strip is welded by the ultrasonic welding.
3. A method according to claim 2, wherein the PE strip is provided with two sides of a non-porous tape, each side having a width of 2-3mm, and a middle of the two sides being a fine mesh tape, the non-porous tape portions being overlapped and ultrasonically welded together during the winding process.
4. The use of the reinforced nonwoven fabric tubes of claim 1 to prepare alkaline-resistant tubular membrane elements and components thereof for treating wastewater containing acid and base.
5. The use of claim 4, wherein the alkali-resistant tubular membrane element is obtained by applying the reinforced nonwoven fabric tube, coating a casting solution in the tube, and solidifying the casting solution.
6. An alkali-resistant tubular membrane component comprises tightly-stacked alkali-resistant tubular membrane elements, a diversion trench, a fastening device and a shell;
the fastening device is an elastic net or elastic cloth, and a tubular membrane element tightly stacked is sleeved in the fastening device;
the two diversion trenches are inserted into the cylindrical fastening device, abut against the fastening device, are uniformly distributed and have outward openings;
the tightly stacked tubular membrane elements and the peripheral diversion trenches are integrated into a bundle, so that the fastening device is cylindrical;
the cylindrical fastening device is sleeved in the shell, two ends of the shell are provided with openings, one side of the shell is provided with an opening, and the opening on one side is over against the opening of the diversion trench.
7. The tubular membrane assembly of claim 6, wherein the housing is made of glass fiber reinforced plastic or CPVC.
8. The tubular membrane module of claim 6, wherein the two ends of the outer shell are sealed and fixed with the tubular membrane element by alkali-resistant and high-temperature-resistant sealant, and the opening of the tubular membrane element is unblocked and unsealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010634092.4A CN111659259A (en) | 2020-07-02 | 2020-07-02 | Reinforced non-woven fabric tube and application thereof in tubular membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010634092.4A CN111659259A (en) | 2020-07-02 | 2020-07-02 | Reinforced non-woven fabric tube and application thereof in tubular membrane |
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| Publication Number | Publication Date |
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| CN111659259A true CN111659259A (en) | 2020-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010634092.4A Pending CN111659259A (en) | 2020-07-02 | 2020-07-02 | Reinforced non-woven fabric tube and application thereof in tubular membrane |
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| CN (1) | CN111659259A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111760471A (en) * | 2020-07-03 | 2020-10-13 | 江苏峰科达科技有限公司 | Alkali-resistant backwashing tubular membrane element and tubular membrane assembly thereof |
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| CN1191769A (en) * | 1996-10-25 | 1998-09-02 | 薄膜产品韦姿曼村有限公司 | Process for producing tubular membrane assembly |
| CN1565712A (en) * | 2003-07-04 | 2005-01-19 | 中国科学院上海原子核研究所 | Technique for continuous production of reeling pipe and forming film in-phase of pipe ultrafilter membrane element |
| KR20100095903A (en) * | 2009-02-23 | 2010-09-01 | 이영호 | Making apparatus and method of the tabular braid-reinforced hollow fiber membrane with nanofiber |
| CN101927133A (en) * | 2010-04-23 | 2010-12-29 | 威海云龙复合纺织材料有限公司 | High-flux filter material, preparation method thereof and self-inhalation medical mask made of high-flux filter material |
| CN102371125A (en) * | 2011-10-26 | 2012-03-14 | 天津市宝钜净化设备工程有限公司 | Non-woven fabric and woven fabric support ultra/micro-filtration membrane, preparation thereof and tubular composite filtration membrane |
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| CN105980131A (en) * | 2014-01-20 | 2016-09-28 | X-流体公司 | A tubular membrane with a helical ridge, as well as a method and apparatus for producing such a tubular membrane |
| JP2019042636A (en) * | 2017-08-30 | 2019-03-22 | 旭化成株式会社 | Gas separation membrane module |
-
2020
- 2020-07-02 CN CN202010634092.4A patent/CN111659259A/en active Pending
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| CN1191769A (en) * | 1996-10-25 | 1998-09-02 | 薄膜产品韦姿曼村有限公司 | Process for producing tubular membrane assembly |
| CN1565712A (en) * | 2003-07-04 | 2005-01-19 | 中国科学院上海原子核研究所 | Technique for continuous production of reeling pipe and forming film in-phase of pipe ultrafilter membrane element |
| KR20100095903A (en) * | 2009-02-23 | 2010-09-01 | 이영호 | Making apparatus and method of the tabular braid-reinforced hollow fiber membrane with nanofiber |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111760471A (en) * | 2020-07-03 | 2020-10-13 | 江苏峰科达科技有限公司 | Alkali-resistant backwashing tubular membrane element and tubular membrane assembly thereof |
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Application publication date: 20200915 |
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| RJ01 | Rejection of invention patent application after publication |