CN113663523B - Preparation method of hollow fiber membrane component - Google Patents
Preparation method of hollow fiber membrane component Download PDFInfo
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- CN113663523B CN113663523B CN202010417025.7A CN202010417025A CN113663523B CN 113663523 B CN113663523 B CN 113663523B CN 202010417025 A CN202010417025 A CN 202010417025A CN 113663523 B CN113663523 B CN 113663523B
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- hollow fiber
- fiber membrane
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- membrane
- diaphragm
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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
- B01D63/02—Hollow fibre modules
- B01D63/021—Manufacturing thereof
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
- C02F3/1273—Submerged membrane bioreactors
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The invention discloses a preparation method of a hollow fiber membrane component, which comprises the following steps: (1) Dividing the hollow fiber membrane filaments into a plurality of hollow fiber membrane bundles; (2) Cutting the end parts of a plurality of hollow fiber membrane bundles flat, and clamping the end parts by using a clamping device, wherein the clamping degree enables the water producing port at the end part to be flattened without being blocked; (3) The method comprises the following steps that a first half clamping plate and a second half clamping plate which are connected are used as bottom plates, and a plurality of hollow fiber membrane wires are surrounded by a plurality of wall plates on the bottom plates to form a casting cavity; (4) Pouring glue into the casting cavity, and forming a colloid after the glue is solidified; (5) Removing the clamping device, and forming a diaphragm capsule by the glue and the wall plate; (6) And (3) arranging the diaphragm capsule in the long diaphragm shell, then casting glue into the long diaphragm shell, and curing the glue. The invention does not need to seal the end of the hollow fiber membrane bundle before casting, has simple operation, shortens the process flow, ensures that the membrane silk holes are completely exposed and does not damage the membrane silk.
Description
Technical Field
The invention belongs to the technical field of hollow fiber membranes, and particularly relates to a preparation method of a hollow fiber membrane component.
Background
At present, the MBR technology of the immersed membrane bioreactor is mainly applied to the sewage treatment industry, such as the treatment and recycling of urban sewage, the treatment fields of high-concentration organic wastewater, refractory industrial wastewater, wastewater in public sensitive sanitary areas and the like. The main functional components are a bioreactor and a membrane module, and a flat membrane module and a hollow fiber membrane module are two most commonly used membrane modules. The filling density of the hollow fiber membrane component is far higher than that of a flat membrane component, the investment is low, the applicable treatment scale can be large or small, the requirements of sewage treatment of different scales in different industries can be met, and the application is most extensive.
The hollow fiber membrane component applied to the immersed membrane bioreactor mainly comprises a curtain type membrane component, a seaweed type component and a membrane bundle type membrane component. The curtain type membrane assembly becomes the mainstream of the market due to the advantages of simple casting process, high unit filling area, low production cost, high membrane area flexibility of a single membrane assembly device and the like.
The existing general curtain-type membrane component adopts epoxy resin or polyurethane resin to cast and bond the hollow fiber membrane filaments and the outer structural member together, but the epoxy resin or polyurethane permeates the membrane filament holes of the component ports in the casting process to permeate into the membrane filament holes, so that the membrane filament holes are blocked, and the effective filtration holes of the membrane filaments of the component are reduced. In addition, the traditional manufacturing process of the curtain type membrane assembly generally comprises the steps of arranging and cutting the hollow fiber membrane, sealing holes before casting, casting for the first time, cutting after glue is cured, combining the membrane element after the casting for the first time with an MBR water collecting pipe, and casting for two times or more times. Some research institutions adopt epoxy resin or polyurethane for end capping before casting, but epoxy resin and polyurethane have good flowing property and long curing time, so that the end capping effect is poor, the efficiency is low, and the method is not suitable for large-scale production.
CN103785294A discloses a method for sealing end before casting of hollow fiber membrane module, wherein the sealing end treatment of the hollow fiber membrane module before casting is performed by using fast and easily dried acrylic resin, the acrylic resin has high viscosity and cannot penetrate into membrane pores, so that effective membrane filtration pores can be improved, the curing time of the acrylic resin is fast, and the production efficiency can be improved to a great extent. CN106512740A discloses a hollow fiber curtain type membrane element sealing method and a sealing device thereof, wherein before the sealing glue is injected into a box body, a hole blocking substance is adopted to block an inner hole of a hollow fiber membrane wire, and the hole blocking substance is formed by mixing putty powder or gypsum powder with water. And cutting the membrane element after the sealing glue is cured, inserting the membrane element into the diaphragm capsule cavity, and encapsulating the sealing glue for bonding. The problems existing in the prior art mainly include: 1. the end sealing before casting is carried out, the operation is complex, the process flow is long, and the phenomena of incomplete end sealing and hole blocking of membrane yarns can occur; 2. the end capping is got rid of in cutting after the casting for the first time, exposes the membrane silk hole, also cuts the colloid when cutting the membrane silk, has both wasted the membrane silk and has also wasted sealed glue, produces the adhesive tape simultaneously and gives up admittedly, and this is useless admittedly to handle the degree of difficulty greatly, with high costs, polluted environment.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a preparation method of a hollow fiber membrane component.
The technical scheme of the invention is as follows:
a preparation method of a hollow fiber membrane module comprises the following steps:
(1) Dividing the hollow fiber membrane filaments into a plurality of hollow fiber membrane bundles;
(2) Cutting the end parts of a plurality of hollow fiber membrane bundles flat, and clamping the end parts by using a clamping device, wherein the clamping degree ensures that a water producing port at the end part is flattened but not blocked;
(3) The method comprises the following steps that a first half clamping plate and a second half clamping plate which are connected are used as bottom plates, and a plurality of hollow fiber membrane filaments are surrounded by a plurality of wall plates on the bottom plates to form a casting cavity;
(4) Pouring glue into the casting cavity, and forming a colloid connected with the end part of the hollow fiber membrane bundle after the glue is solidified;
(5) Removing the clamping device, and forming a diaphragm capsule by the glue and the wall plate;
(6) And (3) arranging the diaphragm box in a long diaphragm shell, wherein the long diaphragm shell is provided with a limiting structure matched with the size of the diaphragm box, then casting glue into the long diaphragm shell, fixedly connecting the diaphragm box with the long diaphragm shell after the glue is cured, and communicating a water production port of a hollow fiber diaphragm bundle of the diaphragm box with a water collecting pipe of the long diaphragm shell.
In a preferred embodiment of the present invention, inner wall surfaces of the first groove and the second groove are coated with a soft material to protect the hollow fiber membrane filaments.
In a preferred embodiment of the present invention, the first half splint and the second half splint are provided with mounting grooves for the wallboard to be inserted.
In a preferred embodiment of the present invention, the joints between the siding panels and the first and second half decking are filled with a sealant.
Further preferably, the sealant is acrylic resin, silica gel or hot melt adhesive.
In a preferred embodiment of the invention, the glue is an epoxy or a polyurethane.
In a preferred embodiment of the present invention, the end of the bundle of hollow fiber membranes protrudes 0.1 to 10mm beyond the holding means.
In a preferred embodiment of the invention, the number of first recesses of said first half splint is 1-50.
In a preferred embodiment of the present invention, the material of the wall plate is ABS or PVC.
In a preferred embodiment of the present invention, the material of the holding device is stainless steel or carbon steel.
The invention has the beneficial effects that:
1. the method does not need to seal the end of the hollow fiber membrane bundle before casting, is simple to operate, shortens the process flow, ensures that membrane silk holes are completely exposed and does not damage membrane silks;
2. the method disclosed by the invention is free from cutting after the first casting, does not waste membrane wires and sealant, reduces the cost, does not generate solid waste, and is environment-friendly.
3. The invention can divide the hollow fiber membrane filaments into membrane bundles which can be arranged at equal intervals, and the gaps of the membrane bundles can become sludge discharge channels during operation, thereby improving the pollution resistance of the membrane module.
Drawings
Fig. 1 is a schematic structural diagram of a holding apparatus in embodiment 1 of the present invention.
Fig. 2 is a schematic perspective view of a casting cavity formed by a clamping device and a wall plate in embodiment 1 of the present invention.
Fig. 3 is a schematic perspective view showing an assembled state of the holding device, the wall plate, and the hollow fiber membrane bundle in example 1 of the present invention.
Fig. 4 is a sectional view of the bellows in embodiment 1 of the present invention.
Fig. 5 is a sectional view showing the attachment of the bellows to the long bellows casing in embodiment 1 of the present invention.
Detailed Description
The technical solution of the present invention is further illustrated and described by the following detailed description in conjunction with the accompanying drawings.
Comparative example 1
The comparative example is an internal support PVDF hollow fiber membrane module of a hollow fiber membrane manufacturer, sealing treatment before casting is not carried out, epoxy resin is used as a binder, hollow fiber membrane filaments and an external structural member are centrifugally cast and bonded together, cutting is carried out after curing, and then secondary casting is carried out to prepare the flat curtain type membrane module.
Comparative example 2
The comparative example is an internal support PVDF hollow fiber membrane module of a certain hollow fiber membrane manufacturer, the end capping treatment is carried out by polyacrylic resin before casting, the operation time is 0.5h, the curing time is 0.5h, epoxy resin is used as a binder, hollow fiber membrane filaments and an external structural member are centrifugally cast and bonded together, cutting is carried out after curing, and the flat curtain type membrane module is prepared by further secondary casting.
Example 1
(1) Dividing hollow fiber membrane filaments (an internal support PVDF hollow fiber membrane of a certain hollow fiber membrane manufacturer) into a plurality of hollow fiber membrane bundles 1, and equally dividing the hollow fiber membrane bundles by using rubber bands, nylon ropes, bands, winding membranes and adhesive tapes;
(2) Cutting the ends of a plurality of hollow fiber membrane bundles 1 flat, and clamping the ends by a clamping device 2 (made of stainless steel or carbon steel) shown in figure 1 to the extent that a water producing port 10 at the end is flattened without being blocked, and the ends of the hollow fiber membrane bundles 1 extend out of the clamping device by 20.1-10mm;
the clamping device 2 comprises a first half clamping plate 21 and a second half clamping plate 22, wherein eight arc-shaped first grooves 210 are formed in the first half clamping plate 21 along the length direction of the first half clamping plate, a plurality of second grooves 220 which are arc-shaped and correspond to the first grooves 210 one by one are formed in the second half clamping plate 22 along the length direction of the second half clamping plate, after the first half clamping plate 21 and the second half clamping plate 22 are connected with each other through bolts, a hollow fiber membrane bundle 1 is clamped by the first grooves 210 and the second grooves 220 in a matched mode, and the inner wall surfaces of the first grooves 210 and the second grooves 220 are coated with soft materials to protect the contacted hollow fiber membrane filaments;
(3) As shown in fig. 2 and 3, a first half clamping plate 21 and a second half clamping plate 22 which are connected with each other are used as a bottom plate, a plurality of hollow fiber membrane filaments are surrounded by a plurality of wall plates 3 (made of ABS or PVC) on the bottom plate to form a casting cavity 30, joints between the wall plates 3 and the first half clamping plate 21 and the second half clamping plate 22 are filled with a sealant, and the sealant is acrylic resin, silica gel or hot melt adhesive; preferably, as shown in fig. 1, the first half clamping plate 21 and the second half clamping plate 22 are provided with installation grooves 23 for the wallboard 3 to be inserted.
(4) Pouring glue (epoxy resin or polyurethane) into the pouring cavity 30, and forming a colloid 31 connected with the end part of the hollow fiber membrane bundle 1 after the glue is solidified;
(5) Removing the holding device 2, the glue 31 and the wall plate 3 to form a bellows as shown in fig. 4;
(6) As shown in fig. 5, the membrane cassette is installed in the long membrane housing 4, the long membrane housing 4 has a limiting structure 41 adapted to the size of the membrane cassette, then glue (epoxy resin or polyurethane) is cast into the long membrane housing 4, the membrane cassette is fixedly connected with the long membrane housing 4 after the glue is cured, and the water producing port 10 of the hollow fiber membrane bundle 1 of the membrane cassette is connected with the water collecting pipe 42 of the long membrane housing 4, so as to obtain the membrane cassette.
Preferably, two ends of the hollow fiber membrane bundle 1 can be cut flat at the same time, clamped by the two clamping devices 2 at the same time, and then cast at the same time; if the U-shaped membrane module is manufactured, the two end parts are cut flat, clamped by the same clamping device 2, and cast.
The method for measuring and calculating the effective porosity of the membrane wire filter in the above examples and comparative examples comprises the following steps:
the cutting length of the hollow fiber membrane filaments is the length of the membrane filaments wasted in the process of cutting and removing the end sealing after the first casting.
The sealant waste amount is the sealant quality wasted when the end sealing is cut and removed after the first casting.
And (4) counting the number of casting defect holes according to the number of the component surface unevenness holes after cutting.
And counting the damaged number of the surface of the membrane wire according to the falling number of the coating layer on the surface of the membrane wire.
The effect pairs of the above comparative examples and examples are shown in the following table:
| comparative example 1 | Comparative example 2 | Example 1 | |
| Area of single-curtain membrane, m 2 | 35 | 35 | 35 |
| Cut length of hollow fiber membrane filament, mm | 120 | 120 | 0 |
| Amount of sealant waste g | 300 | 300 | 0 |
| Effective porosity of membrane silk filter | 20％ | 98％ | 100％ |
| Number of casting |
0 | 12 | 0 |
| Number of damaged |
0 | 100 | 0 |
The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the invention, which is defined by the appended claims.
Claims (6)
1. A method for preparing a hollow fiber membrane module is characterized by comprising the following steps: the method comprises the following steps:
(1) Dividing the hollow fiber membrane filaments into a plurality of hollow fiber membrane bundles;
(2) Cutting the end parts of a plurality of hollow fiber membrane bundles flat, clamping the end parts by using a clamping device, wherein the clamping degree enables a water producing port at the end part to be flattened without being blocked;
the inner wall surfaces of the first groove and the second groove are coated with soft materials so as to protect the hollow fiber membrane filaments contacted with the inner wall surfaces;
(3) The first half clamping plate and the second half clamping plate which are connected are used as bottom plates, a plurality of hollow fiber membrane filaments are surrounded by a plurality of wall plates on the bottom plates to form casting cavities, and the end parts of the hollow fiber membrane bundles extend out of the clamping device by 0.1-10mm; the first half splint and the second half splint are provided with mounting grooves for the insertion of the wallboard; the joints among the wallboards and the joints of the wallboards and the first half splint and the second half splint are filled with sealant;
(4) Pouring glue into the casting cavity, and forming a colloid connected with the end part of the hollow fiber membrane bundle after the glue is solidified;
(5) Removing the clamping device, and forming a diaphragm capsule by the glue and the wall plate;
(6) And (3) arranging the diaphragm capsule in a long diaphragm shell, wherein the long diaphragm shell is provided with a limiting structure matched with the size of the diaphragm capsule, then casting glue into the long diaphragm shell, fixedly connecting the diaphragm capsule with the long diaphragm shell after the glue is cured, and communicating a water production port of a hollow fiber diaphragm bundle of the diaphragm capsule with a water collecting pipe of the long diaphragm shell.
2. The method of claim 1, wherein: the sealant is acrylic resin, silica gel or hot melt adhesive.
3. The method of claim 1, wherein: the glue is epoxy resin or polyurethane.
4. The method of claim 1, wherein: the number of the first grooves of the first half splint is 1-50.
5. The production method according to any one of claims 1 to 4, characterized in that: the wallboard is made of ABS or PVC.
6. The production method according to any one of claims 1 to 4, characterized in that: the clamping device is made of stainless steel or carbon steel.
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| CN202010417025.7A CN113663523B (en) | 2020-05-15 | 2020-05-15 | Preparation method of hollow fiber membrane component |
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| CN202010417025.7A CN113663523B (en) | 2020-05-15 | 2020-05-15 | Preparation method of hollow fiber membrane component |
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| WO2019174301A1 (en) * | 2018-03-13 | 2019-09-19 | 上海麦驼科技发展有限公司 | U-shaped unit module for tubular filter membrane |
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| JPS58143805A (en) * | 1982-02-17 | 1983-08-26 | Nitto Electric Ind Co Ltd | Liquid separation apparatus |
| JP3130075B2 (en) * | 1991-05-20 | 2001-01-31 | エヌオーケー株式会社 | Method for manufacturing porous yarn membrane module and jig for manufacturing porous yarn membrane module |
| JP3299323B2 (en) * | 1992-11-30 | 2002-07-08 | エヌオーケー株式会社 | Hollow fiber membrane module and method of manufacturing the same |
| JP3385668B2 (en) * | 1993-09-10 | 2003-03-10 | 住友電気工業株式会社 | Manufacturing method and manufacturing jig for hollow fiber module |
| EP1442782A4 (en) * | 2001-11-05 | 2005-04-06 | Asahi Chemical Ind | Hollow fiber membrane module |
| JP2009154910A (en) * | 2007-12-26 | 2009-07-16 | Asahi Kasei Chemicals Corp | Packaging body of hollow fiber membrane filter element |
| CN104888607B (en) * | 2015-06-15 | 2017-04-19 | 江苏鸿典投资股份有限公司 | Flat-plat membrane module and casting method thereof |
| CN110038442B (en) * | 2019-04-03 | 2022-03-29 | 三达膜科技（厦门）有限公司 | End-sealing treatment method before casting of internal support hollow fiber membrane yarn |
| CN109970175A (en) * | 2019-04-28 | 2019-07-05 | 盐城海普润膜科技有限公司 | A kind of putamina for curtain type film assembly |
| CN110282731B (en) * | 2019-06-24 | 2023-12-19 | 三达膜科技（厦门）有限公司 | MBR membrane module root air inlet structure |
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