CN111036079A - Hollow fiber membrane module and water purification method - Google Patents
Hollow fiber membrane module and water purification method Download PDFInfo
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- CN111036079A CN111036079A CN202010095292.7A CN202010095292A CN111036079A CN 111036079 A CN111036079 A CN 111036079A CN 202010095292 A CN202010095292 A CN 202010095292A CN 111036079 A CN111036079 A CN 111036079A
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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
- B01D63/04—Hollow fibre modules comprising multiple hollow fibre assemblies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/025—Reverse osmosis; Hyperfiltration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/027—Nanofiltration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/145—Ultrafiltration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/147—Microfiltration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Nanotechnology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a hollow fiber membrane component and a water purification method, comprising a sleeve with a sleeve water gap, wherein a hollow fiber membrane component is arranged in the sleeve; end covers are arranged at two ends of the sleeve, and a central hole and a side hole are formed in each end cover; the hollow fiber membrane piece comprises a central tube which is arranged on the central hole in a penetrating way, and a plurality of water holes are arranged on the central tube; the central pipe is spirally wrapped with a water inlet net, one end of the water inlet net is connected with a water-stop film, and the water-stop film is spirally wrapped on the central pipe along with the water inlet net; a plurality of hollow fiber membrane filaments axially parallel to the central tube are arranged on the water-resisting membrane; and two ends perpendicular to the central pipe are provided with a sealing adhesive layer coated on the central pipe, the water inlet net and the waterproof membrane, one end of the sealing adhesive layer is arranged on the pipe wall of the central pipe, and the other end of the sealing adhesive layer is arranged at the tail end of the waterproof membrane far away from the central pipe. The invention can make the hollow fiber membrane more easily washed by water flow in the using and cleaning process, thereby being not easy to be polluted, being convenient for cleaning and easy for recovering the performance.
Description
Technical Field
The invention relates to the technical field of water purification, in particular to a hollow fiber membrane module and a water purification method.
Background
Nowadays, the water quality requirements of industrial production, such as the production of products in various industries, such as biology, medicine, petroleum, chemical industry, semiconductors, etc., which have strict requirements on water, scientific research institutions, laboratories, and even our daily life are higher and higher. Therefore, the water needs to be treated to remove various toxic and harmful substances and impurities in the water, so that the application requirements of the water can be met. Hollow fiber has good application under industry, municipal administration and domestic water purification environment because its higher filter fineness, huge specific surface area, but hollow fiber leads to its easy pollution because its great water flux and dead end filtration mode, and traditional hollow fiber original paper leads to it to be difficult to wash because inside no runner design, receives easily to pollute and washs inconveniently. .
Disclosure of Invention
The invention aims to provide a hollow fiber membrane module and a water purification method. The invention can make the hollow fiber membrane more easily washed by water flow in the using and cleaning process, thereby being not easy to be polluted, being convenient for cleaning and easy for recovering the performance.
The technical scheme of the invention is as follows: a hollow fiber membrane component comprises a sleeve with a sleeve water gap, wherein a hollow fiber membrane component is arranged in the sleeve; end covers are arranged at two ends of the sleeve, and a central hole and a side hole are formed in each end cover; the hollow fiber membrane piece comprises a central tube which is arranged on the central hole in a penetrating way, and a plurality of water holes are arranged on the central tube; the central pipe is spirally wrapped with a water inlet net, one end of the water inlet net is connected with a water-stop film, and the water-stop film is spirally wrapped on the central pipe along with the water inlet net; a plurality of hollow fiber membrane filaments axially parallel to the central tube are arranged on the water-resisting membrane; and two ends perpendicular to the central pipe are provided with a sealing adhesive layer coated on the central pipe, the water inlet net and the waterproof membrane, one end of the sealing adhesive layer is arranged on the pipe wall of the central pipe, and the other end of the sealing adhesive layer is arranged at the tail end of the waterproof membrane far away from the central pipe.
In the hollow fiber membrane module, the hollow fiber membrane filaments are microfiltration hollow fibers, ultrafiltration hollow fibers, nanofiltration hollow fibers or reverse osmosis hollow fibers.
In the hollow fiber membrane module, one end of the water inlet net is attached to the pipe wall of the central pipe, and the other end of the water inlet net is connected with the water-stop membrane; the width of the water inlet net is equal to that of the water-resisting film; the water inlet net is spirally wrapped on the central pipe for 2-3 circles.
In the hollow fiber membrane module, the hollow fiber membrane filaments are uniformly arranged on the water-resisting membrane.
In the hollow fiber membrane module, the hollow fiber membrane filaments are arranged on the water-stop membrane in an increasing or decreasing manner.
In the hollow fiber membrane module, the end cover is provided with the first sealing step, the outer side of the first sealing step is matched with the sleeve, and the inner side of the first sealing step is sealed with the water-resisting membrane through the sealing glue.
In the hollow fiber membrane module, the side wall of the lower end of the central hole protrudes to form a second sealing step, and the second sealing step and the central tube are sealed by sealing glue.
In the method for the hollow fiber membrane module, during dead-end operation, concentrated water is fed through a sleeve water gap on the sleeve, the concentrated water flows along the spiral direction of the waterproof membrane to the central pipe, a plurality of groups of hollow fiber membrane components on the waterproof membrane are used for filtering and collecting produced water, and the produced water flows out from a side hole on an end cover;
when the dead end of the hollow fiber membrane wire needs to be cleaned after running, the side hole on the end cover is blocked, cleaning water enters from the sleeve water gap or the central pipe to form spiral cleaning water flow from the sleeve water gap to the central pipe or spiral cleaning water flow from the central pipe to the sleeve water gap, and the hollow fiber membrane wire is cleaned, so that pollution to the hollow fiber membrane wire in the dead end running can be quickly removed, and the performance is recovered;
when the cross-flow filtration mode is operated, concentrated water is fed through a sleeve water gap or a central pipe on the sleeve, the concentrated water flows in the direction of the central pipe or the sleeve water gap along the spiral direction of the water-stop membrane, a plurality of groups of hollow fiber membrane parts on the water-stop membrane are used for filtering and collecting produced water, and the hollow fiber membrane parts are more easily washed by the water flow due to the spiral water flow, so that the coverage of pollutants on the hollow fiber membrane parts is reduced, and the longer service life is maintained; the produced water of the hollow fiber membrane element flows out from the side hole on the end cover, and concentrated water is collected by the central tube or the sleeve water gap;
when the hollow fiber membrane filaments need to be cleaned after cross-flow filtration operation, the side holes in the end covers are blocked, cleaning water enters from the sleeve water gap or the central pipe, spiral cleaning water flow from the sleeve water gap to the central pipe or spiral cleaning water flow from the central pipe to the sleeve water gap is formed, and the hollow fiber membrane filaments are cleaned.
According to the method for the hollow fiber membrane module, the hollow fiber membrane filaments are arranged on the water-resisting membrane in an increasing or decreasing mode to form flowing-in with gradually-changed thickness, and in the running process, the flowing water flow can maintain a certain level in an increasing or decreasing mode through the hollow fiber membrane filaments under the condition that the water flow in the flow channel is reduced along with the outflow of the produced water from the hollow fiber membrane filaments, so that the concentration plan is avoided, and the pollution of the hollow fiber membrane filaments is aggravated.
Compared with the prior art, the invention has the following beneficial effects:
1. when the water-saving device runs at a dead end, concentrated water is fed through a sleeve water gap on the sleeve, the concentrated water flows along the direction of the water-resisting film spiral to the central pipe, a plurality of groups of hollow fiber membrane pieces on the water-resisting film are used for filtering and collecting produced water, and the produced water flows out from a side hole on an end cover; when the dead end of the hollow fiber membrane wire needs to be cleaned after running, the side hole on the end cover is blocked, cleaning water enters from the sleeve water gap or the central pipe to form spiral cleaning water flow from the sleeve water gap to the central pipe or spiral cleaning water flow from the central pipe to the sleeve water gap, and the hollow fiber membrane wire is cleaned, so that pollution to the hollow fiber membrane wire in the dead end running can be quickly removed, and the performance is recovered;
2. when the cross-flow filtration mode is operated, concentrated water is fed through a sleeve water gap or a central pipe on the sleeve, the concentrated water flows along the direction of the water-stop film spiral to the central pipe or the sleeve water gap, a plurality of groups of hollow fiber membrane parts on the water-stop film are used for filtering and collecting produced water, and the spiral water flow enables the hollow fiber membrane parts to be easily washed by water flow, so that the coverage of pollutants on the hollow fiber membrane parts is reduced, and the longer service life is maintained; the produced water of the hollow fiber membrane element flows out from the side hole on the end cover, and concentrated water is collected by the central tube or the sleeve water gap; when the hollow fiber membrane wire needs to be cleaned after cross-flow filtration operation, the side hole on the end cover is blocked, cleaning water enters from the sleeve water gap or the central pipe to form spiral cleaning water flow from the sleeve water gap to the central pipe or spiral cleaning water flow from the central pipe to the sleeve water gap, and the hollow fiber membrane wire is cleaned, so that pollution caused by the hollow fiber membrane wire during operation can be quickly removed.
According to the invention, the hollow fiber membrane filaments are arranged on the water-resisting membrane in an increasing or decreasing mode to form a gradually-changed thickness flow, and in the running process, along with the outflow of produced water from the hollow fiber membrane filaments and the reduction of the water flow in the flow channel, the flowing water flow can be maintained at a certain level in an increasing or decreasing mode through the hollow fiber membrane filaments, so that the concentration plan is avoided, and the pollution of the hollow fiber membrane filaments is aggravated.
According to the invention, the first sealing step and the second sealing step are matched with each other, so that the water produced by the hollow fiber membrane piece and the concentrated water and the cleaning water cannot be mixed, the processing and the production are convenient, and the installation convenience is improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of a hollow fiber membrane element;
fig. 3 is a schematic structural view of the end cap.
Reference numerals
1. A sleeve water gap; 2. a sleeve; 3. a hollow fiber membrane element; 4. an end cap; 5. a central bore; 6. a side hole; 7. a central tube; 8. a water pore; 9. a water inlet net; 10. a water-barrier film; 11. hollow fiber membrane filaments; 12. sealing the adhesive layer; 13. a first sealing step; 14. a second sealing step.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.
Example (b): a hollow fiber membrane module, as shown in fig. 1-2, comprising a sleeve 2 with a sleeve water gap 1, a hollow fiber membrane element 3 is arranged in the sleeve 2, the hollow fiber membrane wires 11 are micro-filtration hollow fibers, the material can be PS, PFDV, PTFE, PVC, PP, etc., and can be obtained commercially; end covers 4 are arranged at two ends of the sleeve 2, and the end covers 4 and the two ends of the sleeve 2 are sealed by using hoops; the end cover 4 is provided with a central hole 5 and a side hole 6; the hollow fiber membrane element 3 comprises a central tube 7 which is arranged on the central hole 5 in a penetrating way, a plurality of water holes 8 are arranged on the central tube 7, and water can be mutually communicated between the water holes 8 and the central tube 7; a water inlet net 9 is spirally coated on the central pipe 7, wherein one end of the water inlet net 9 is attached to the pipe wall of the central pipe 7, and the other end of the water inlet net 9 is in a net structure connected with a water-stop film 10; the width of the water inlet net 9 is equal to that of the water-resisting film 10; the water inlet net 9 is spirally wrapped on the central pipe for 2-3 circles; the waterproof film 10 is a flexible film which is waterproof and has good cohesiveness; the waterproof membrane 10 is spirally coated on the central pipe 7 along with the water inlet net 9 to form a spiral flow passage; a plurality of hollow fiber membrane wires 11 axially parallel to the central tube 7 are arranged on the water-stop membrane 10, and the hollow fiber membrane wires 11 are arranged on the water-stop membrane 10 in an increasing or decreasing manner; and two ends perpendicular to the central pipe 7 are provided with a sealant layer 12 coated on the central pipe 7, the water inlet net 9 and the water-stop film 10, one end of the sealant layer 12 is arranged on the pipe wall of the central pipe 7, and the other end of the sealant layer is arranged at the tail end of the water-stop film 10 far away from the central pipe 7.
When the device runs at a dead end, concentrated water is fed through a sleeve water gap 1 on a sleeve 2, the concentrated water flows along the direction of a water-stop membrane spiral direction to a central pipe 7, a plurality of groups of hollow fiber membrane parts 3 on a water-stop membrane 10 are used for filtering and collecting produced water, and the produced water flows out from a side hole 6 on an end cover 4; when the hollow fiber membrane wire 11 needs to be cleaned after the dead end operation, the side hole 6 on the end cover 4 is blocked, cleaning water enters from the sleeve water gap 1 or the central pipe 7 to form spiral cleaning water flow from the sleeve water gap 1 to the central pipe 7 or spiral cleaning water flow from the central pipe 7 to the sleeve water gap 1, and the hollow fiber membrane wire 11 is cleaned, so that the pollution on the hollow fiber membrane wire 11 in the dead end operation can be quickly removed, and the performance is recovered;
when the cross-flow filtration type water-saving filter operates, concentrated water enters through the sleeve water gap 1 or the central pipe 7 on the sleeve 2, the concentrated water flows along the direction of the water-stop membrane spiral to the central pipe 7 or the sleeve water gap 1, a plurality of groups of hollow fiber membrane parts 3 on the water-stop membrane 10 are used for filtering and collecting produced water, and the spiral water flow enables the hollow fiber membrane parts 3 to be easily washed by water flow, so that the coverage of pollutants on the hollow fiber membrane parts 3 is reduced, and the longer service life is maintained; the produced water of the hollow fiber membrane element 3 flows out from a side hole 6 on the end cover 4, and concentrated water is collected by a central tube 7 or a sleeve water gap 1; when the hollow fiber membrane wires 11 need to be cleaned after cross-flow filtration operation, the side holes 6 on the end cover 4 are blocked, cleaning water enters from the sleeve water gap 1 or the central pipe 7 to form spiral cleaning water flow from the sleeve water gap 1 to the central pipe 7 or spiral cleaning water flow from the central pipe 7 to the sleeve water gap 1, and the hollow fiber membrane wires 11 are cleaned, so that pollution caused by the hollow fiber membrane wires 11 in the operation can be quickly removed.
According to the invention, the hollow fiber membrane wires 11 are arranged on the water-resisting membrane 10 in an increasing or decreasing mode to form a flowing-in mode with gradually changed thickness, and in the running process, along with the outflow of produced water from the hollow fiber membrane wires 11 and the reduction of the water flow in a flow passage, the flowing water flow can maintain a certain level in an increasing or decreasing mode through the hollow fiber membrane wires 11, so that the concentration plan is avoided, and the pollution of the hollow fiber membrane wires 11 is aggravated.
In another embodiment, the hollow fiber membrane filaments 11 are uniformly arranged on the water-stop membrane 10.
Further, as shown in fig. 2, a first sealing step 13 is disposed on the end cover 4, an outer side of the first sealing step 13 is matched with the sleeve 2, and an inner side of the first sealing step 13 is sealed with the water-stop film 10 by sealing glue. The side wall of the lower end of the central hole 5 protrudes to form a second sealing step 14, and the second sealing step 14 and the central tube 7 are sealed through sealing glue.
Principle of operation
When the dead end operates, concentrated water is fed through a sleeve water gap 1 on a sleeve 2, the concentrated water flows along the direction of a water-stop membrane spiral direction to a central pipe 7, a plurality of groups of hollow fiber membrane parts 3 on a water-stop membrane 10 are used for filtering and collecting produced water, and the produced water flows out from a side hole 6 on an end cover 4; when the hollow fiber membrane wire 11 needs to be cleaned after the dead end operation, the side hole 6 on the end cover 4 is blocked, cleaning water enters from the sleeve water gap 1 or the central pipe 7 to form spiral cleaning water flow from the sleeve water gap 1 to the central pipe 7 or spiral cleaning water flow from the central pipe 7 to the sleeve water gap 1, and the hollow fiber membrane wire 11 is cleaned, so that the pollution on the hollow fiber membrane wire 11 in the dead end operation can be quickly removed, and the performance is recovered;
when the cross-flow filtration mode is operated, concentrated water is fed through the sleeve water gap 1 or the central pipe 7 on the sleeve 2, the concentrated water flows along the direction of the water-stop film spiral to the central pipe 7 or the sleeve water gap 1, a plurality of groups of hollow fiber membrane parts 3 on the water-stop film 10 are used for filtering and collecting produced water, and the spiral water flow enables the hollow fiber membrane parts 3 to be easily washed by water flow, so that pollutants on the hollow fiber membrane parts 3 are covered, and the longer service life is maintained; the produced water of the hollow fiber membrane element 3 flows out from a side hole 6 on the end cover 4, and concentrated water is collected by a central tube 7 or a sleeve water gap 1; when the hollow fiber membrane wires 11 need to be cleaned after cross-flow filtration operation, the side holes 6 on the end cover 4 are blocked, cleaning water enters from the sleeve water gap 1 or the central pipe 7 to form spiral cleaning water flow from the sleeve water gap 1 to the central pipe 7 or spiral cleaning water flow from the central pipe 7 to the sleeve water gap 1, and the hollow fiber membrane wires 11 are cleaned, so that pollution caused by the hollow fiber membrane wires 11 in the operation can be quickly removed.
Claims (9)
1. A hollow fiber membrane module characterized in that: comprises a sleeve (2) with a sleeve water gap (1), wherein a hollow fiber membrane part (3) is arranged in the sleeve (2); end covers (4) are arranged at two ends of the sleeve (2), and a central hole (5) and a side hole (6) are formed in each end cover (4); the hollow fiber membrane element (3) comprises a central tube (7) which is arranged on the central hole (5) in a penetrating way, and a plurality of water holes (8) are arranged on the central tube (7); a water inlet net (9) is spirally coated on the central pipe (7), one end of the water inlet net (9) is connected with a water-stop film (10), and the water-stop film (10) is spirally coated on the central pipe (7) along with the water inlet net (9); a plurality of hollow fiber membrane filaments (11) which are axially parallel to the central tube (7) are arranged on the water-resisting membrane (10); and two ends perpendicular to the central pipe (7) are provided with sealing adhesive layers (12) coated on the central pipe (7), the water inlet net (9) and the water-stop film (10), one end of each sealing adhesive layer (12) is arranged on the pipe wall of the central pipe (7), and the other end of each sealing adhesive layer is arranged at the tail end, far away from the central pipe (7), of the water-stop film (10).
2. The hollow fiber membrane module according to claim 1, characterized in that: the hollow fiber membrane filaments (11) are microfiltration hollow fibers, ultrafiltration hollow fibers, nanofiltration hollow fibers or reverse osmosis hollow fibers.
3. The hollow fiber membrane module according to claim 1, characterized in that: the water inlet net (9) is of a net structure, one end of the water inlet net is attached to the pipe wall of the central pipe (7), and the other end of the water inlet net is connected with the water-stop film (10); the width of the water inlet net (9) is equal to that of the water-resisting film (10); the water inlet net (9) is spirally wrapped on the central pipe for 2-3 circles.
4. The hollow fiber membrane module according to claim 1, characterized in that: the hollow fiber membrane filaments (11) are uniformly distributed on the water-stop membrane (10).
5. The hollow fiber membrane module according to claim 1, characterized in that: the hollow fiber membrane filaments (11) are arranged on the water-resisting membrane (10) in an increasing or decreasing mode.
6. The hollow fiber membrane module according to claim 1, characterized in that: the end cover (4) is provided with a first sealing step (13), the outer side of the first sealing step (13) is matched with the sleeve (2), and the inner side of the first sealing step (13) is sealed with the waterproof film (10) through sealing glue.
7. The hollow fiber membrane module according to claim 1, characterized in that: and the side wall of the lower end of the central hole (5) protrudes to form a second sealing step (14), and the second sealing step (14) and the central tube (7) are sealed by sealing glue.
8. The method of a hollow fiber membrane module according to any one of claims 1 to 7, characterized in that: when the dead end runs, concentrated water is fed through a sleeve water gap on the sleeve, the concentrated water flows along the direction of the center pipe along the spiral direction of the waterproof membrane, a plurality of groups of hollow fiber membrane pieces on the waterproof membrane are used for filtering and collecting produced water, and the produced water flows out from a side hole on the end cover;
when the dead end of the hollow fiber membrane wire needs to be cleaned after running, the side hole on the end cover is blocked, cleaning water enters from the sleeve water gap or the central pipe to form spiral cleaning water flow from the sleeve water gap to the central pipe or spiral cleaning water flow from the central pipe to the sleeve water gap, and the hollow fiber membrane wire is cleaned, so that pollution to the hollow fiber membrane wire in the dead end running can be quickly removed, and the performance is recovered;
when the cross-flow filtration mode is operated, concentrated water is fed through a sleeve water gap or a central pipe on the sleeve, the concentrated water flows in the direction of the central pipe or the sleeve water gap along the spiral direction of the water-stop membrane, a plurality of groups of hollow fiber membrane parts on the water-stop membrane are used for filtering and collecting produced water, and the hollow fiber membrane parts are more easily washed by the water flow due to the spiral water flow, so that the coverage of pollutants on the hollow fiber membrane parts is reduced, and the longer service life is maintained; the produced water of the hollow fiber membrane element flows out from the side hole on the end cover, and concentrated water is collected by the central tube or the sleeve water gap;
when the hollow fiber membrane filaments need to be cleaned after cross-flow filtration operation, the side holes in the end covers are blocked, cleaning water enters from the sleeve water gap or the central pipe, spiral cleaning water flow from the sleeve water gap to the central pipe or spiral cleaning water flow from the central pipe to the sleeve water gap is formed, and the hollow fiber membrane filaments are cleaned.
9. The method of a hollow fiber membrane module according to claim 8, characterized in that: the hollow fiber membrane filaments are arranged on the water-resisting membrane in an increasing or decreasing mode to form flowing with gradually changed thickness, and in the running process, along with the outflow of produced water from the hollow fiber membrane filaments, under the condition that the flow rate of the water in the flow channel is reduced, the flowing water flow can maintain a certain level in an increasing or decreasing mode through the hollow fiber membrane filaments, so that concentration plans are avoided, and the pollution of the hollow fiber membrane filaments is aggravated.
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| CN202010095292.7A CN111036079A (en) | 2020-02-17 | 2020-02-17 | Hollow fiber membrane module and water purification method |
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| CN107531526A (en) * | 2015-04-16 | 2018-01-02 | 陶氏环球技术有限责任公司 | Filtering assembly comprising screw winding bioreactor and ultrafiltration film module |
| CN206240334U (en) * | 2016-08-31 | 2017-06-13 | 北京碧水源膜科技有限公司 | A kind of slit is aerated rolling hollow fiber uf membrane system |
| CN206474022U (en) * | 2016-11-23 | 2017-09-08 | 朱斌 | A kind of efficient membrane module structure |
| CN211612273U (en) * | 2020-02-17 | 2020-10-02 | 南京壹净新材料科技有限公司 | Hollow fiber membrane module |
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