CN112516801B - Method for manufacturing hollow fiber membrane element - Google Patents
Method for manufacturing hollow fiber membrane element Download PDFInfo
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- CN112516801B CN112516801B CN202011189347.7A CN202011189347A CN112516801B CN 112516801 B CN112516801 B CN 112516801B CN 202011189347 A CN202011189347 A CN 202011189347A CN 112516801 B CN112516801 B CN 112516801B
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- hollow fiber
- fiber membrane
- shell
- membrane
- adhesive
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- 239000012528 membrane Substances 0.000 title claims abstract description 246
- 239000012510 hollow fiber Substances 0.000 title claims abstract description 183
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 50
- 239000000853 adhesive Substances 0.000 claims abstract description 38
- 230000001070 adhesive effect Effects 0.000 claims abstract description 38
- 239000000835 fiber Substances 0.000 claims abstract description 15
- 239000008213 purified water Substances 0.000 claims abstract description 13
- 238000004806 packaging method and process Methods 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 claims description 14
- 239000002390 adhesive tape Substances 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 11
- 238000000576 coating method Methods 0.000 claims description 11
- 238000004804 winding Methods 0.000 claims description 8
- 230000000903 blocking effect Effects 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 230000035515 penetration Effects 0.000 claims 2
- 239000004819 Drying adhesive Substances 0.000 claims 1
- 238000001914 filtration Methods 0.000 abstract description 5
- 238000011049 filling Methods 0.000 abstract description 3
- 230000000149 penetrating effect Effects 0.000 abstract description 3
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000005520 cutting process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000004831 Hot glue Substances 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229920005749 polyurethane resin Polymers 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000001471 micro-filtration Methods 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
-
- 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
-
- 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
- B01D63/024—Hollow fibre modules with a single potted end
-
- 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
- B01D63/025—Bobbin units
-
- 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
Landscapes
- 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 hollow fiber membrane element comprises a shell, and a hollow fiber membrane and a central tube which are arranged in the shell, wherein the shell is provided with a water inlet and a purified water outlet, and is characterized in that the hollow fiber membrane is a hollow fiber membrane formed by bonding at least one end of a plurality of hollow fiber membrane wires which are arranged in parallel, one end central hole of the hollow fiber membrane is closed to form a closed end, the other end central hole of the hollow fiber membrane is opened to form an open end and is arranged close to the purified water outlet, the hollow fiber membrane is wound on the central tube by taking the central axis of the central tube as a central axis, and a breathable fiber membrane is arranged in the central tube in a penetrating manner. The invention also discloses a manufacturing method of the hollow fiber membrane element. The center of the membrane element is provided with the breathable fiber membrane, so that gas in the membrane element and gas attached to water in the using process can not accumulate in the inner cavity of the membrane element, the water filling amount and the effective filtering area of the hollow fiber membrane are influenced, and the manufacturing method is favorable for reducing the adhesive loss.
Description
Technical Field
The invention relates to a water filtering membrane component, in particular to a hollow fiber membrane component and a manufacturing method thereof.
Background
Most of the hollow fiber membrane element manufacturing processes in the domestic market at present are manual manufacturing, the degree of automation is low, the manufacturing process design is unreasonable, the consistency of the membrane element structure is poor, the arrangement of the packaging end faces is disordered, the packaging end faces are locally dense, moreover, because a dead-end full-filtration mode is adopted, initial air in the membrane element cannot be completely discharged through a filter membrane, and in addition, inflow water is dissolved and contained gas is continuously accumulated, so that the effective water filling amount of the cavity in the membrane element is reduced, the hollow membrane fibers in the membrane element cannot be fully contacted with water, and the effective utilization rate of the hollow membrane fibers in the membrane element is low.
In the use and operation process of most hollow fiber membrane elements, as impurities in filtrate accumulate and the internal pressure of the water team membrane elements during use, the hollow fiber filter element membranes become concentrated and compact, the internal part of the hollow fiber membranes cannot fully contact water, the performance of the membrane elements is reduced, and finally the service life of the hollow fiber filter element membrane elements is greatly reduced.
Most of the manufacturing processes of the hollow fiber membrane elements need to cut and finish the hollow fiber membranes for multiple times, the hollow fiber membranes need to be cut again after the membrane elements are packaged, the waste of the hollow fiber membranes is serious, the adhesive manufacturability loss is large, various devices are needed for cutting and packaging, and the cutting dust is easy to cause pollution to the membrane elements and the environment.
Disclosure of Invention
The first technical problem to be solved by the present invention is to provide a hollow fiber membrane element with high utilization rate of hollow fiber membrane by exhausting air energy.
The second technical problem to be solved by the present invention is to provide a method for preparing a hollow fiber membrane element with high utilization rate of hollow fiber membrane by exhausting air energy.
The third technical problem to be solved by the invention is to provide a preparation method of a hollow fiber membrane element with small adhesive loss aiming at the state of the art.
The technical scheme adopted by the invention for solving the first technical problem is as follows: the hollow fiber membrane element comprises a shell, and a hollow fiber membrane and a central tube which are arranged in the shell, wherein the shell is provided with a water inlet and a purified water outlet, and is characterized in that the hollow fiber membrane is a hollow fiber membrane formed by bonding at least one end of a plurality of hollow fiber membrane wires which are arranged in parallel, one end central hole of the hollow fiber membrane is closed to form a closed end, the other end central hole of the hollow fiber membrane is opened to form an open end and is arranged close to the purified water outlet, the hollow fiber membrane is wound on the central tube by taking the central axis of the central tube as a central axis, and a breathable fiber membrane is arranged in the central tube in a penetrating manner.
The hollow fiber membrane may specifically take the form of one of the following:
the first kind of hollow fiber membrane is one with several hollow fiber membrane wires in parallel and adhered separately.
And secondly, the hollow fiber membrane is a hollow fiber membrane formed by bonding one ends of a plurality of hollow fiber membrane wires which are arranged in parallel, the other ends of the hollow fiber membrane are free ends, the central holes of the bonded ends of the hollow fiber membrane are open to form open ends, and the central holes of the free ends of the other ends of the hollow fiber membrane are closed to form closed ends.
Preferably, the shell comprises a shell, a base and a water collecting cover arranged on the base, the side wall of the shell is provided with the water inlet, one end of the opening of the shell is fixedly connected with the base, the base is axially hollow, the open end of the hollow fiber membrane is positioned in the base, and the water collecting cover is axially provided with the purified water outlet.
Further, a supporting and dividing net is arranged in the hollow fiber membrane. The support division net can lead the hollow fiber membrane to be evenly spaced, the hollow fiber membrane in the interior is fully contacted with water, the performance of the membrane element is improved, and finally the service life of the hollow fiber membrane element is greatly prolonged.
The technical scheme adopted by the invention for solving the first technical problem and the second technical problem is as follows:
the first, a method for manufacturing a hollow fiber membrane element, is characterized by comprising the following steps:
(1) firstly, orderly arranging a plurality of hollow fiber membrane filaments with a certain length to the required width of a membrane element according to a certain distance, then coating adhesive on two ends of the hollow fiber membrane filaments, and respectively and fixedly connecting the two ends of the hollow fiber membrane filaments;
(2) blocking a central hole at one end of the hollow fiber membrane wire by using an adhesive to form a closed end, and forming an open end at the central hole at the other end to prepare a hollow fiber membrane;
(3) coating an adhesive with the same width on the side surface of the hollow fiber membrane, taking the central tube with the air-permeable fiber membrane as a central axis of the hollow fiber membrane, keeping the hollow fiber membrane tensioned by a certain tension, and orderly winding the hollow fiber membrane on the central tube to fix the hollow fiber membrane on the central tube;
(4) the open end of the hollow fiber membrane is stuck by an adhesive tape to obtain a membrane assembly;
(5) placing the base into a packaging jig, then placing the open end of the membrane module into the base for heating, melting and bonding the adhesive to fill gaps, taking out, cooling, removing the packaging jig, removing the adhesive tape, and finishing bonding and fixing packaging;
(6) and (5) assembling the upper shell, and assembling the water collecting cover at the upper end of the shell to finish the membrane element manufacture.
The second, a method for manufacturing a hollow fiber membrane element, characterized by comprising the steps of:
(1) firstly, orderly arranging a plurality of hollow fiber membrane filaments with a certain length to the required width of a membrane element according to a certain distance, and then coating an adhesive on one end of the hollow fiber membrane filaments to fixedly connect one end of the hollow fiber membrane filaments and freely scatter the other end of the hollow fiber membrane filaments;
(2) blocking one end of the hollow fiber membrane wire by using an adhesive to form a closed end, and forming an open end by opening a central hole at the other end to prepare a hollow fiber membrane;
(3) coating an adhesive with the same width on the side surface of the hollow fiber membrane, taking the central tube with the air-permeable fiber membrane as a central axis of the hollow fiber membrane, keeping the hollow fiber membrane tensioned by a certain tension, and orderly winding the hollow fiber membrane on the central tube to fix the hollow fiber membrane on the central tube;
(4) the open end of the hollow fiber membrane is stuck by an adhesive tape to obtain a membrane assembly;
(5) placing the base into a packaging jig, then placing the open end of the membrane module into the base for heating, melting and bonding the adhesive to fill gaps, taking out, cooling, removing the packaging jig, removing the adhesive tape, and finishing bonding and fixing packaging;
(6) and (5) assembling the upper shell, and assembling the water collecting cover at the upper end of the shell to finish the membrane element manufacture.
Further, a support dividing net is glued to the middle part of the hollow fiber membrane before winding in the step (3).
Preferably, the hollow fiber membrane filaments in step (1) are bonded and fixed under the following conditions: the width of the adhesive is 25 mm-40 mm, and the thickness is more than 0.5mm larger than the diameter of the hollow fiber membrane.
Preferably, the heating conditions in step (5) are as follows: the heating temperature is 50-75 ℃ and the heating time is 10-30 minutes.
The adhesive mentioned above may be a hot melt adhesive, or may be a polyurethane resin or an epoxy resin.
Compared with the prior art, the invention has the advantages that: because the hollow fiber membranes are arranged according to a certain interval method and fixed by a certain amount of adhesive, the hollow fiber membranes are formed into a sheet-shaped object with a certain thickness, the hollow fiber membranes in the membrane element can not gather due to the action of internal pressure when in use, and water can not contact all the hollow membrane fibers. The center of the membrane element is provided with the breathable fiber membrane, so that gas in the membrane element and gas attached to water in the using process can not accumulate in the inner cavity of the membrane element, and the water filling amount and the effective filtering area of the hollow fiber membrane are affected. The adhesive is heated to further bond, so that the possibility of leakage points of air holes of the membrane element is greatly reduced, the time and equipment for cutting the end of the membrane element are reduced, and the use amount of the potting adhesive is also greatly reduced. The membrane element structure is suitable for various hollow fiber membrane elements, in particular to a membrane element for dead-end full-flow filtration such as hollow fiber ultrafiltration and hollow fiber microfiltration membrane elements.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1.
Fig. 2 is a cross-sectional view of fig. 1.
Fig. 3 is a schematic cross-sectional view of fig. 1.
FIG. 4 is a developed view of the hollow fiber membrane in example 1.
Fig. 5 is a state diagram of the manufacturing method of example 1 in step (4).
Fig. 6 is a state diagram of the manufacturing method of example 1 in step (5).
Fig. 7 is a cross-sectional view of example 2.
FIG. 8 is a developed view of the hollow fiber membrane in example 2.
Fig. 9 is a cross-sectional view of example 3.
Fig. 10 is a schematic cross-sectional view of example 3.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
In example 1, as shown in fig. 1, 2 and 3, the hollow fiber membrane element in this example includes a housing and a hollow fiber membrane 5 provided in the housing, and the hollow fiber membrane 5 is provided in the housing via an adhesive layer 7. Specifically, the casing includes shell 1, base 6 and locates the water collecting cover 2 on the base 6, and shell 1 lateral wall has water inlet 11, and shell 1 open-ended one end is connected fixedly with base 6, and base 13 axial cavity, hollow fiber membrane's open end 53 location are in base 13, and water collecting cover 2 axial has water purification export 21, and water collecting cover 2 is equipped with sealing washer 22 at water purification export periphery cover. The hollow fiber membrane 5 is a hollow fiber membrane formed by arranging a plurality of hollow fiber membrane wires 51 in parallel and bonding two ends, one end of the hollow fiber membrane is closed to form a closed end, the other end of the hollow fiber membrane is opened to form an open end and is arranged near the purified water outlet 21, the hollow fiber membrane is wound on the central tube 3 by taking the central axis of the central tube 3 as a central axis, and the central tube 3 is internally penetrated and provided with the ventilation fiber membrane 4.
The method for manufacturing the hollow fiber membrane element in the embodiment comprises the following steps:
(1) firstly, a plurality of hollow fiber membrane wires 51 with a certain length are orderly arranged to the required width of the membrane element according to a certain distance, then an adhesive is coated at two ends of the hollow fiber membrane wires 51, and the two ends of the hollow fiber membrane wires 51 are fixedly connected to form adhesive ends 52, as shown in fig. 4. The hollow fiber membrane filaments 51 satisfy the following conditions when adhesively fixed: the width of the adhesive is 25 mm-40 mm, and the thickness is more than 0.5mm larger than the diameter of the hollow fiber membrane 5.
(2) Blocking a central hole at one end of the hollow fiber membrane wire 51 by using an adhesive to form a closed end, and forming an open end at the central hole at the other end to prepare a hollow fiber membrane;
(3) coating an adhesive with the same width on the side surface of the hollow fiber membrane, taking the central tube 3 with the air-permeable fiber membrane 4 inside as a central axis of the hollow fiber membrane, keeping the hollow fiber membrane tensioned by a certain tension, and orderly winding the hollow fiber membrane on the central tube 3 to fix the hollow fiber membrane on the central tube 3;
(4) the open end of the hollow fiber membrane is stuck by an adhesive tape 8 to obtain a membrane assembly, as shown in figure 5;
(5) the package base 10 is placed in the package jig, and then the open end of the membrane module is placed in the package base 10 for heating, as shown in fig. 6, under the following heating conditions: heating to 50-75 deg.c for 10-30 min to make the adhesive melt and bond to fill the gap, cooling after taking out, eliminating the package base 10, eliminating the adhesive tape 8 and fixing the package;
(6) and assembling the upper shell 1, and assembling the water collecting cover 2 at the upper end of the shell 1 to finish the membrane element manufacture.
The adhesive in this embodiment may be a hot melt adhesive, or may be polyurethane resin or epoxy resin.
In example 2, as shown in fig. 7, the hollow fiber membrane 5 in this example is a hollow fiber membrane sheet formed by arranging a plurality of hollow fiber membrane filaments 51 in parallel and bonding one end, wherein the bonded end of the hollow fiber membrane sheet forms an open end and is disposed near the purified water outlet 21, the other end is closed to form a free closed end, the hollow fiber membrane sheet is wound around the central tube 3 with the central axis of the central tube 3 as the central axis, and the air-permeable fiber membrane 4 is disposed in the central tube 3 in a penetrating manner. The hollow fiber membrane is internally provided with a supporting and dividing net 9. Other structures refer to embodiment 1.
The method for manufacturing the hollow fiber membrane element in the embodiment comprises the following steps:
(1) firstly, arranging a plurality of hollow fiber membrane wires 51 with a certain length to the required width of a membrane element in order according to a certain distance, then coating an adhesive on one end of the hollow fiber membrane wires 51 to fixedly connect one end of the hollow fiber membrane wires 51 to form an adhesive end 52, and freely dispersing the other end, as shown in fig. 8;
(2) blocking one end of the hollow fiber membrane wires 51 by using an adhesive to form a closed end, and forming an open end by opening a central hole at the other end to prepare a hollow fiber membrane;
(3) coating an adhesive with the same width on the side surface of the hollow fiber membrane, taking the central tube 3 with the air-permeable fiber membrane 4 inside as a central axis of the hollow fiber membrane, keeping the hollow fiber membrane tensioned by a certain tension, and orderly winding the hollow fiber membrane on the central tube 3 to fix the hollow fiber membrane on the central tube 3;
(4) the open end of the hollow fiber membrane is stuck by an adhesive tape 8 to obtain a membrane assembly;
(5) placing the packaging base 10 into a packaging jig, placing the open end of the membrane module into the packaging base 10, heating to enable the adhesive to melt and bond so as to fill gaps, taking out, cooling, removing the packaging base 10, removing the adhesive tape 8, and finishing bonding and fixing packaging;
(6) and assembling the upper shell 1, and assembling the water collecting cover 2 at the upper end of the shell 1 to finish the membrane element manufacture.
In example 3, as shown in fig. 9 and 10, a support dividing net 9 is provided in the hollow fiber membrane in this example. Before the hollow fiber membrane is wound around the central tube 3, a support dividing net 9 is bonded to the middle of the hollow fiber membrane. The support dividing mesh 9 in this embodiment may be a nonwoven fabric, and a mesh layer may be used. Other structures refer to embodiment 1.
Claims (9)
1. The manufacturing approach of a hollow fiber membrane element, characterized by that this hollow fiber membrane element, including the shell and locate hollow fiber membrane (5) and central tube (3) in the shell, the aforesaid shell has water inlets (11) and purified water outlets (21), characterized by that the said hollow fiber membrane (5) is by the hollow fiber membrane that the parallel arrangement of many hollow fiber membrane filaments (51) and at least one end bond, one end central hole of this hollow fiber membrane is closed and formed the blind end (54), another end central hole opening forms the open end (53) and is set up near purified water outlet (21), the said hollow fiber membrane is coiled on central tube (3) with the central axis of the central tube (3) as the central axis, the penetration has ventilative fibrous membrane (4) in this central tube (3);
the shell comprises a shell (1), a base (6) and a water collecting cover (2) arranged on the base (6), wherein the water inlet (11) is formed in the side wall of the shell (1), one end of the opening of the shell (1) is fixedly connected with the base (6), the base (6) is axially hollow, the open end (53) of the hollow fiber membrane is positioned in the base (6), and the water collecting cover (2) is axially provided with the purified water outlet (21);
the method comprises the following steps:
(1) firstly, orderly arranging a plurality of hollow fiber membrane wires (51) with a certain length to the required width of a membrane element according to a certain distance, then coating adhesive on two ends of the hollow fiber membrane wires (51), and respectively and fixedly connecting the two ends of the hollow fiber membrane wires (51);
(2) blocking a central hole at one end of a hollow fiber membrane wire (51) by using an adhesive to form a closed end, and forming an open end by opening the central hole at the other end to prepare a hollow fiber membrane;
(3) coating an adhesive with the same width on the side surface of the hollow fiber membrane, taking the central tube (3) with the air-permeable fiber membrane (4) inside as a central axis of the hollow fiber membrane, keeping the hollow fiber membrane tensioned by a certain tension, and orderly winding the hollow fiber membrane on the central tube (3) to fix the hollow fiber membrane on the central tube (3);
(4) the open end of the hollow fiber membrane is stuck by an adhesive tape (8) to obtain a membrane component;
(5) placing the base (6) into a packaging jig (10), then placing the open end of the membrane module into the base (6) for heating, melting and bonding the adhesive to fill gaps, taking out, cooling, removing the packaging jig (10), removing the adhesive tape (8), and finishing bonding, fixing and packaging;
(6) and (3) assembling the shell (1), and assembling the water collecting cover (2) at the upper end of the shell (1) to finish the membrane element manufacture.
2. The method according to claim 1, wherein the hollow fiber membrane (5) is a hollow fiber membrane sheet formed by arranging a plurality of hollow fiber membrane filaments (51) in parallel and bonding both ends thereof.
3. The method according to claim 1, wherein the hollow fiber membrane (5) is a hollow fiber membrane formed by arranging a plurality of hollow fiber membrane wires (51) in parallel and bonding one end, the other end is a free end, the central hole of the bonded end of the hollow fiber membrane is opened to form an open end, and the central hole of the free end of the other end is closed to form a closed end.
4. A method according to claim 1, 2 or 3, characterized in that a supporting dividing net (9) is provided in the hollow fiber membrane.
5. The manufacturing approach of a hollow fiber membrane element, characterized by that this hollow fiber membrane element, including the shell and locate hollow fiber membrane (5) and central tube (3) in the shell, the aforesaid shell has water inlets (11) and purified water outlets (21), characterized by that the said hollow fiber membrane (5) is by the hollow fiber membrane that the parallel arrangement of many hollow fiber membrane filaments (51) and at least one end bond, one end central hole of this hollow fiber membrane is closed and formed the blind end (54), another end central hole opening forms the open end (53) and is set up near purified water outlet (21), the said hollow fiber membrane is coiled on central tube (3) with the central axis of the central tube (3) as the central axis, the penetration has ventilative fibrous membrane (4) in this central tube (3);
the shell comprises a shell (1), a base (6) and a water collecting cover (2) arranged on the base (6), wherein the water inlet (11) is formed in the side wall of the shell (1), one end of the opening of the shell (1) is fixedly connected with the base (6), the base (6) is axially hollow, the open end (53) of the hollow fiber membrane is positioned in the base (6), and the water collecting cover (2) is axially provided with the purified water outlet (21);
the method comprises the following steps:
(1) firstly, arranging a plurality of hollow fiber membrane wires (51) with a certain length to the required width of a membrane element in order according to a certain distance, and then coating an adhesive on one end of the hollow fiber membrane wires (51) to fixedly connect one end of the hollow fiber membrane wires (51) and freely scatter the other end of the hollow fiber membrane wires;
(2) blocking one end of the hollow fiber membrane wire (51) by using an adhesive to form a closed end, and forming an open end by opening a central hole at the other end to prepare a hollow fiber membrane;
(3) coating an adhesive with the same width on the side surface of the hollow fiber membrane, taking the central tube (3) with the air-permeable fiber membrane (4) inside as a central axis of the hollow fiber membrane, keeping the hollow fiber membrane tensioned by a certain tension, and orderly winding the hollow fiber membrane on the central tube (3) to fix the hollow fiber membrane on the central tube (3);
(4) the open end of the hollow fiber membrane is stuck by an adhesive tape (8) to obtain a membrane component;
(5) placing the base (6) into a packaging jig (10), then placing the open end of the membrane module into the base (6) for heating, melting and bonding the adhesive to fill gaps, taking out, cooling, removing the packaging jig (10), removing the adhesive tape (8), and finishing bonding, fixing and packaging;
(6) and (3) assembling the shell (1), and assembling the water collecting cover (2) at the upper end of the shell (1) to finish the membrane element manufacture.
6. A method according to claim 1 or 5, characterized in that the hollow fiber membrane in step (3) is glued with a supporting dividing mesh (9) in the middle before winding.
7. The method according to claim 1 or 5, wherein the hollow fiber membrane filaments (51) in step (1) are bonded and fixed under the following conditions: the width of the adhesive is 25 mm-40 mm, and the thickness is more than 0.5mm larger than the diameter of the hollow fiber membrane (5).
8. The method according to claim 1 or 5, wherein the heating conditions in the step (5) are as follows: the heating temperature is 50-75 ℃ and the heating time is 10-30 minutes.
9. The method according to claim 1 or 5, wherein the adhesive is a quick-drying adhesive or a thermosol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011189347.7A CN112516801B (en) | 2020-10-30 | 2020-10-30 | Method for manufacturing hollow fiber membrane element |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011189347.7A CN112516801B (en) | 2020-10-30 | 2020-10-30 | Method for manufacturing hollow fiber membrane element |
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| CN112516801A CN112516801A (en) | 2021-03-19 |
| CN112516801B true CN112516801B (en) | 2024-04-12 |
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