CN114849482A - Flow stabilizing type flow channel membrane element and production process - Google Patents
Flow stabilizing type flow channel membrane element and production process Download PDFInfo
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- CN114849482A CN114849482A CN202210702092.2A CN202210702092A CN114849482A CN 114849482 A CN114849482 A CN 114849482A CN 202210702092 A CN202210702092 A CN 202210702092A CN 114849482 A CN114849482 A CN 114849482A
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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
- B01D63/065—Tubular membrane modules with membranes on a surface of a support tube on the outer 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
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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
- B01D63/067—Tubular membrane modules with pleated membranes
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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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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
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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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/004—Seals, connections
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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
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- Chemical Kinetics & Catalysis (AREA)
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- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Nanotechnology (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a flow stabilizing channel membrane element, which comprises a central tube, wherein a cavity is arranged in the central tube, a plurality of through holes communicated with the cavity are formed in the surface of the central tube, at least one membrane unit is rolled outside the central tube, the membrane unit comprises a water producing grid connected with the central tube, and a water inlet unit is arranged on the water producing grid; the water inlet unit comprises a folded diaphragm, a water inlet grid assembly with the thickness gradually reduced from one side to the other side is arranged in the folded diaphragm, and the thicker side of the water inlet grid assembly is close to the central pipe; and the water inlet unit is provided with a sealing glue with a U-shaped structure. The invention can keep the water flow linear speed on the surface of the diaphragm at a certain level when the water flow in the flow channel is reduced, thereby improving the stability of water production.
Description
Technical Field
The invention relates to the technical field of water purification, in particular to a flow stabilizing channel membrane element and a production process thereof.
Background
As the water quality in the environment is easily polluted due to industrial production and the like, the demand of people on the quality of drinking water is gradually improved, and a large amount of reverse osmosis and nanofiltration water purification equipment appears in the market at present. The membrane element is used for filtering impurities in water flow, so that pure water required by people is produced and used for production and living of people.
When the existing membrane element is in actual use, in the flowing process of water flow, water flow is gradually reduced along with the continuous outflow of produced water through the membrane, so that the linear velocity of the water flow on the surface of the membrane is gradually reduced; in addition, because the impurities in the water flow are filtered, the impurities are attached to the flow channel close to the water inlet side, so that the available space on the side, close to the water inlet end, of the flow channel is gradually reduced, and the linear velocity of the water flow on the surface of the membrane is also gradually reduced. Therefore, the design of a membrane element capable of maintaining a constant water production linear velocity has become an urgent problem to be solved.
Disclosure of Invention
The invention aims to provide a flow stabilizing channel membrane element and a production process thereof. The invention can keep the water flow linear speed on the surface of the diaphragm at a certain level when the water flow in the flow channel is reduced, thereby improving the stability of water production.
The technical scheme of the invention is as follows: the flow stabilizing channel membrane element comprises a central tube, wherein a cavity is formed in the central tube, a plurality of through holes communicated with the cavity are formed in the surface of the central tube, at least one membrane unit is rolled outside the central tube, the membrane unit comprises a water producing grid connected with the central tube, and a water inlet unit is arranged on the water producing grid; the water inlet unit comprises a folded diaphragm, a water inlet grid assembly with the thickness gradually reduced from one side to the other side is arranged in the folded diaphragm, and the thicker side of the water inlet grid assembly is close to the central pipe; and the water inlet unit is provided with a sealing glue with a U-shaped structure.
In the flow stabilizing channel membrane element, the membrane sheet is provided with the separation layer and the support layer, the membrane sheet is symmetrically folded in a manner that short sides are folded in half and long sides are overlapped, and the separation layer of the membrane sheet is inward and the support layer is outward; the water inlet grid assembly is in contact with the separation layer of the membrane; the rolling direction of the film leaf unit is parallel to the direction of the folding line.
In the flow stabilizing channel membrane element, the water inlet grid assembly comprises a water inlet grid with gradually reduced thickness.
In the above membrane element with a steady flow channel, the water inlet grid assembly includes two or more gradually stacked water inlet grids with the same thickness and different lengths.
In the flow stabilizing channel membrane element, the water inlet grid assembly comprises two or more than two water inlet grids which are connected in a front-back manner and have different thicknesses.
In the flow stabilizing channel membrane element, the sealant comprises a long glue line arranged along the long side of the folding opening side of the water inlet unit and two short glue lines arranged along the short sides of the two sides of the water inlet unit; the two ends of the long glue line are respectively connected with the tail ends of the two short glue lines to form a U-shaped structure, and the opening direction of the U-shaped structure is opposite to the folding opening direction of the water inlet unit; produce and be equipped with two side rubber lines on the water graticule mesh, the folding department of side rubber line with the unit of intaking begins to extend to the both sides of producing the water graticule mesh.
In the above-mentioned stationary flow channel membrane element, the membrane may be one of a microfiltration membrane, an ultrafiltration membrane, a nanofiltration membrane or a reverse osmosis membrane.
In the flow stabilizing channel membrane element, the membrane element formed by winding one or more membrane leaf units around the central pipe has two end faces, and the end face close to the opening side of the U-shaped structure is a pure water outlet surface; the water flow enters from one end of the central tube, the concentrated water passes through the through holes and flows out from the periphery of the membrane element, and the pure water flows out from the pure water outlet surface.
The production process of the flow stabilizing channel membrane element comprises the following steps:
s1: taking a piece of membrane, folding the membrane in a mode that short sides are folded in half and long sides are overlapped, enabling a supporting layer of the membrane to be outward and a separating layer to be inward;
s2: inserting the water inlet grid assembly with the gradually-thinned thickness into the folded membrane to enable the water inlet grid assembly to be in contact with the separation layer of the membrane to form a water inlet unit;
s3: taking a central pipe and at least one water producing grid, fixing one side of the water producing grid with the central pipe, arranging a water inlet unit on each water producing grid, and placing the thicker side of a water inlet grid assembly in each water inlet unit close to the central pipe to form a membrane unit;
s4: coating sealant on the water inlet unit along the long side and the short sides of the opening side of the folding part, and coating the sealant on the water production grid from the folding part of the water inlet unit to the two sides;
s5: and (3) rolling one or more membrane leaf units on the surface of the central pipe, and cutting off redundant parts at two ends to prepare the membrane element.
In the production process of the flow stabilizing channel membrane element, the manufacturing scheme of the water inlet grid assembly comprises the following steps:
(A) the water inlet grid assembly is made of a water inlet grid with gradually reduced thickness;
(B) the water inlet grid assembly is formed by gradually stacking two or more water inlet grids with the same thickness and different lengths;
(C) the water inlet grid assembly is made by connecting two or more than two water inlet grids with different thicknesses in front and back.
Compared with the prior art, the invention has the following beneficial effects:
1. in the invention, the water inlet unit comprises a folded diaphragm, a water inlet grid assembly with the thickness gradually reduced from one side to the other side is arranged in the folded diaphragm, and the thicker side of the water inlet grid assembly is close to the central pipe; because the graticule mesh subassembly thickness of intaking that is close to the side of intaking is great, and the runner space that is close to the side of intaking promptly is bigger, and along the direction of rivers, the runner space reduces gradually for the film element is when the in-service use, even the discharge in the runner reduces, the product rivers linear velocity on diaphragm surface also can maintain certain level, and the linear velocity of diaphragm surface product rivers can not receive the influence of the interior water flow of runner to a great extent promptly, has improved the stability that the membrane element produced water.
2. In the invention, the membrane can be one of a microfiltration membrane, an ultrafiltration membrane, a nanofiltration membrane or a reverse osmosis membrane, can filter different water qualities, and has wider application range.
3. In the invention, the water inlet end of the membrane element and the water outlet end of the pure water are respectively provided with a water inlet side end cover and a water production side end cover, the interior of the central tube is provided with a water inlet cavity and a water outlet cavity, the surface of the central tube is provided with a plurality of water inlets communicated with the water inlet cavity, and is also provided with a plurality of pure water outlet holes communicated with the water outlet cavity. When using, rivers enter into the center tube from the intake antrum in, ooze the membrane page or leaf unit through a plurality of inlet openings in, dense water flows from the periphery of membrane element, and the pure water flows from the pure water play surface of membrane element to enter into the play water intracavity through the pure water apopore, finally flow from the other end of center tube, make the play water of pure water more concentrated, avoid pure water and dense water to cluster water each other.
4. According to the invention, the Y-shaped sealing ring is arranged on the water inlet side of the membrane element, and the Y-shaped sealing ring is matched with the water inlet side end cover, so that the sealing effect of the water inlet side of the membrane element can be improved, and the condition that the water inlet side leaks is avoided.
Drawings
FIG. 1 is a schematic view of a membrane of the present invention folded in half;
FIG. 2 is an assembly view of the diaphragm and water inlet grid assembly of the present invention;
FIG. 3 is a schematic view of the structure of the water inlet unit of the present invention;
FIG. 4 is a schematic view of a manufacturing scheme of the water inlet grid assembly of the present invention;
FIG. 5 is a schematic flow diagram of concentrated water in a membrane unit according to the present invention;
FIG. 6 is a schematic view showing the flow direction of pure water in the membrane unit according to the present invention;
FIG. 7 is a schematic view of the structure of a membrane element according to the present invention;
FIG. 8 is a schematic view of the working principle of a membrane element according to the invention;
FIG. 9 is a schematic structural view of embodiment 2 of the present invention;
FIG. 10 is a schematic structural view of a center pipe in example 2 of the present invention;
FIG. 11 is a schematic view showing the structure of a water inlet side end cap in embodiment 2 of the present invention;
FIG. 12 is a schematic view showing the structure of a water producing side end cap in example 2 of the present invention;
FIG. 13 is a schematic construction view of embodiment 3 of the present invention;
FIG. 14 is a cross-sectional view of FIG. 13;
fig. 15 is a schematic structural view of a Y-shaped seal ring in embodiment 3 of the present invention.
The labels in the figures are: 1-a membrane; 1 a-a separation layer; 1 b-a support layer; 2-a water inlet grid assembly; 3-producing a water grid; 4-a central tube; 5-sealing glue; 51-long glue lines; 52-short glue line; 53-side glue lines; 6-membrane unit; 7-a through hole; 8-a cavity; 9-a pure water outlet; 10-water outlet cavity; 11-a water inlet cavity; 12-water inlet side end cap; 13-water producing side end cap; 14-ribs; 15-Y type seal ring; 16-water inlet holes; 17-water inlet unit.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.
Example 1: the flow stabilizing channel membrane element is shown in fig. 7 and comprises a central tube 4, a cavity 8 is arranged inside the central tube 4, as shown in fig. 6, a plurality of through holes 7 communicated with the cavity 8 are formed in the surface of the central tube 4, at least one membrane unit 6 is rolled outside the central tube 4, as shown in fig. 5, the membrane unit 6 comprises a water producing grid 3 connected with the central tube 4, and a water inlet unit 17 is arranged on the water producing grid 3; as shown in fig. 1, the water inlet unit 17 includes a folded membrane 1, and the membrane 1 may be one of a microfiltration membrane, an ultrafiltration membrane, a nanofiltration membrane or a reverse osmosis membrane, and can filter different water qualities, so that the application range is wider; the membrane sheet 1 is provided with a separation layer 1a and a support layer 1b, as shown in figure 2, the membrane sheet 1 is symmetrically folded in a mode that short sides are folded in half and long sides are overlapped, the separation layer 1a of the membrane sheet 1 faces inwards, the support layer 1b faces outwards, and the rolling direction of the membrane unit 6 is parallel to the direction of the folding lines; as shown in the attached drawing 3, the inside graticule mesh subassembly 2 of intaking that is equipped with from a side to opposite side thickness taper down of diaphragm 1 of fifty percent discount, the one side that the graticule mesh subassembly 2 of intaking is thick is close to center tube 4, the graticule mesh subassembly 2 of intaking contacts with the separation layer 1a of diaphragm 1, along with the flow of rivers, it constantly sees through diaphragm 1 and flows away to produce water, and water flow reduces gradually, but because the thickness of the graticule mesh subassembly 2 of intaking also reduces gradually along with the direction of rivers for the linear velocity of rivers still can maintain at certain level after reducing after rivers, although water flow reduces gradually, the water linear velocity on diaphragm 1 surface still maintains in certain level.
The formation of the tapered thickness water inlet grid assembly 2 includes, but is not limited to, the following: as shown in the scheme a of fig. 4, the water inlet grid assembly 2 comprises a water inlet grid with gradually reduced thickness; as shown in the scheme B in fig. 4, the water inlet grid assembly 2 comprises two or more water inlet grids which are stacked step by step and have the same thickness but different lengths; as shown in the embodiment C of fig. 4, the water inlet grid assembly 2 includes two or more water inlet grids of different thicknesses connected in series.
The water inlet unit 17 is provided with a U-shaped sealant 5, the sealant 5 comprises a long glue line 51 arranged along the long side of the folded opening side of the water inlet unit 17, and further comprises two short glue lines 52 arranged along the short sides of the two sides of the water inlet unit; the two ends of the long glue line 51 are respectively connected with the tail ends of the two short glue lines 52 to form a U-shaped structure, and the opening direction of the U-shaped structure is opposite to the folding opening direction of the water inlet unit 17; produce and be equipped with two side rubber lines 53 on the water grid net 3, side rubber line 53 begins to extend to the both sides of producing water grid net 3 with the folding department of intaking unit 17.
The water flow enters the cavity 8 from one end of the central tube 4 and seeps out into the membrane unit 6 through the through holes 7, the flow direction of the concentrated water in the membrane unit 6 is shown in figure 5, the concentrated water flows from one end of the water producing grid 3 close to the central tube 4 to the other end of the water producing grid 3, and the pure water flows towards the opening direction of the U-shaped structure, as shown in figure 6.
As shown in fig. 8, the membrane element formed by rolling one or more membrane leaf units 6 around the central tube 4 has two end faces, and the end face close to the opening side of the U-shaped structure is a pure water outlet surface; the water flow enters from one end of the central tube 4, the concentrated water passes through the plurality of through holes 7 and flows out from the periphery of the membrane element, and the pure water flows out from the pure water outlet surface.
Example 2: as shown in fig. 9, in order to avoid water mixing of pure water and concentrated water, a water inlet side end cover 12 and a water production side end cover 13 are respectively arranged at a water inlet end of a membrane element and a water outlet end of the pure water, the structure of the water inlet side end cover 12 is shown in fig. 11, the structure of the water production side end cover 13 is shown in fig. 12, and a plurality of ribs 14 are arranged on the inner wall of the water production side end cover 13 to ensure that a sufficient space is formed between the water outlet surface of the pure water and the water production side end cover 13 to allow the pure water to flow out; in addition, in this embodiment, the central tube 4 has a water inlet cavity 11 and a water outlet cavity 10 inside, and the surface of the central tube 4 is provided with a plurality of water inlet holes 16 communicated with the water inlet cavity 11 and a plurality of pure water outlet holes 9 communicated with the water outlet cavity 10. In use, as shown in fig. 10, water flows into the central tube 4 from the water inlet cavity 11, seeps into the membrane leaf unit 6 through the plurality of water inlet holes 16, concentrated water flows out from the periphery of the membrane element, and pure water flows out from the pure water outlet surface of the membrane element, enters the water outlet cavity 10 through the pure water outlet hole 9, and finally flows out from the other end of the central tube 4.
Through the design, the outlet water of the pure water can be more concentrated, and the mutual water mixing of the pure water and the concentrated water is avoided.
Example 3: as shown in fig. 13 and 14, on the basis of embodiment 2, a Y-shaped sealing ring 15 is further disposed on the water inlet side of the membrane element, and the structure of the Y-shaped sealing ring 15 is as shown in fig. 15, so that the sealing effect on the water inlet side of the membrane element can be improved by matching the Y-shaped sealing ring 15 with the water inlet side end cover 12, and the leakage on the water inlet side is avoided.
The production process of the flow stabilizing channel membrane element comprises the following steps:
s1: taking a piece of membrane, folding the membrane in a mode that short sides are folded in half and long sides are overlapped, enabling a supporting layer of the membrane to be outward and a separating layer to be inward;
s2: inserting the water inlet grid assembly with the gradually-thinned thickness into the folded membrane to enable the water inlet grid assembly to be in contact with the separation layer of the membrane, and placing the thicker side of the water inlet grid assembly in the water inlet unit close to the central pipe to form a water inlet unit;
the manufacturing scheme of the water inlet grid assembly comprises the following steps:
(A) the water inlet grid assembly is made of a water inlet grid with gradually reduced thickness;
(B) the water inlet grid assembly is formed by gradually stacking two or more water inlet grids with the same thickness and different lengths;
(C) the water inlet grid assembly is formed by connecting two or more than two water inlet grids with different thicknesses in front and back;
s3: taking a central pipe and at least one water producing grid net, fixing one side of the water producing grid net with the central pipe, and arranging a water inlet unit on each water producing grid net to form a membrane unit;
s4: coating sealant on the water inlet unit along the long side and the short sides of the opening side of the folding part, and coating the sealant on the water production grid from the folding part of the water inlet unit to the two sides;
s5: and (3) rolling one or more membrane leaf units on the surface of the central pipe, and cutting off redundant parts at two ends to prepare the membrane element.
Claims (10)
1. Steady flow channel membrane element, including center tube (4), the inside of center tube (4) has cavity (8), and the surface of center tube (4) is equipped with a plurality of through-holes (7) that communicate with cavity (8), its characterized in that: at least one membrane unit (6) is rolled outside the central pipe (4), the membrane unit (6) comprises a water producing grid (3) connected with the central pipe (4), and a water inlet unit (17) is arranged on the water producing grid (3); the water inlet unit (17) comprises a folded membrane (1), a water inlet grid assembly (2) with the thickness gradually reduced from one side to the other side is arranged in the folded membrane (1), and the thicker side of the water inlet grid assembly (2) is close to the central pipe (4); and the water inlet unit (17) is provided with a sealing glue (5) with a U-shaped structure.
2. The flow-stabilizing channel membrane element of claim 1, wherein: the membrane (1) is provided with a separation layer (1 a) and a support layer (1 b), the membrane (1) is symmetrically folded in a mode that short sides are folded in half and long sides are overlapped, the separation layer (1 a) of the membrane (1) faces inwards, and the support layer (1 b) faces outwards; the water inlet grid assembly (2) is in contact with the separation layer (1 a) of the membrane (1); the rolling direction of the film leaf unit (6) is parallel to the direction of the folding line.
3. The flow-stabilizing flow channel membrane element of claim 1, wherein: the water inlet grid assembly (2) comprises a water inlet grid with gradually reduced thickness.
4. The flow-stabilizing channel membrane element of claim 1, wherein: the water inlet grid assembly (2) comprises two or more than two water inlet grids which are stacked step by step and have the same thickness but different lengths.
5. The flow-stabilizing channel membrane element of claim 1, wherein: the water inlet grid assembly (2) comprises two or more than two water inlet grids which are connected in a front-back mode and have different thicknesses.
6. The flow-stabilizing channel membrane element of claim 1, wherein: the sealant (5) comprises a long sealant line (51) arranged along the long side of the folded opening side of the water inlet unit (17), and also comprises two short sealant lines (52) arranged along the short sides of the two sides of the water inlet unit; the two ends of the long glue line (51) are respectively connected with the tail ends of the two short glue lines (52) to form a U-shaped structure, and the opening direction of the U-shaped structure is opposite to the folding opening direction of the water inlet unit (17); produce and be equipped with two side glue line (53) on water graticule mesh (3), side glue line (53) begin to extend to the both sides of producing water graticule mesh (3) with the folding department of intaking unit (17).
7. The flow-stabilizing channel membrane element of claim 1, wherein: the membrane (1) can be one of a microfiltration membrane, an ultrafiltration membrane, a nanofiltration membrane or a reverse osmosis membrane.
8. The flow-stabilizing channel membrane element of claim 6, wherein: the membrane element formed after one or more membrane leaf units (6) are rolled by the central tube (4) is provided with two end faces, and the end face close to the opening side of the U-shaped structure is a pure water outlet surface; water flows into the central pipe (4) from one end, concentrated water passes through the through holes (7) and flows out from the periphery of the membrane element, and pure water flows out from the pure water outlet surface.
9. A process for producing a flow-stabilizing channel membrane element according to any one of claims 1 to 8, comprising the steps of:
s1: taking a piece of membrane, folding the membrane in a mode that short sides are folded in half and long sides are overlapped, enabling a supporting layer of the membrane to be outward and a separating layer to be inward;
s2: inserting the water inlet grid assembly with the gradually-thinned thickness into the folded membrane to enable the water inlet grid assembly to be in contact with the separation layer of the membrane to form a water inlet unit;
s3: taking a central pipe and at least one water producing grid, fixing one side of the water producing grid with the central pipe, arranging a water inlet unit on each water producing grid, and placing the thicker side of a water inlet grid assembly in each water inlet unit close to the central pipe to form a membrane unit;
s4: coating sealant on the water inlet unit along the long side and the short sides of the opening side of the folding part, and coating the sealant on the water production grid from the folding part of the water inlet unit to the two sides;
s5: and (3) rolling one or more membrane leaf units on the surface of the central pipe, and cutting off redundant parts at two ends to prepare the membrane element.
10. The process for producing a flow-stabilizing channel membrane element according to claim 9, wherein the scheme for manufacturing the water inlet grid assembly comprises:
(A) the water inlet grid assembly is made of a water inlet grid with gradually reduced thickness;
(B) the water inlet grid assembly is formed by gradually stacking two or more water inlet grids with the same thickness and different lengths;
(C) the water inlet grid assembly is made by connecting two or more than two water inlet grids with different thicknesses in front and back.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210702092.2A CN114849482A (en) | 2022-06-21 | 2022-06-21 | Flow stabilizing type flow channel membrane element and production process |
| CN202321247160.7U CN220159665U (en) | 2022-06-21 | 2023-05-22 | End face converging type filter element assembly and filter element |
| CN202321247380.XU CN219784377U (en) | 2022-06-21 | 2023-05-22 | Filter element assembly and filter element |
| PCT/CN2023/101260 WO2023246738A1 (en) | 2022-06-21 | 2023-06-20 | End surface confluence-type filter element assembly and filter element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210702092.2A CN114849482A (en) | 2022-06-21 | 2022-06-21 | Flow stabilizing type flow channel membrane element and production process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114849482A true CN114849482A (en) | 2022-08-05 |
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Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210702092.2A Pending CN114849482A (en) | 2022-06-21 | 2022-06-21 | Flow stabilizing type flow channel membrane element and production process |
| CN202321247160.7U Active CN220159665U (en) | 2022-06-21 | 2023-05-22 | End face converging type filter element assembly and filter element |
| CN202321247380.XU Active CN219784377U (en) | 2022-06-21 | 2023-05-22 | Filter element assembly and filter element |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321247160.7U Active CN220159665U (en) | 2022-06-21 | 2023-05-22 | End face converging type filter element assembly and filter element |
| CN202321247380.XU Active CN219784377U (en) | 2022-06-21 | 2023-05-22 | Filter element assembly and filter element |
Country Status (2)
| Country | Link |
|---|---|
| CN (3) | CN114849482A (en) |
| WO (1) | WO2023246738A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2023246738A1 (en) | 2023-12-28 |
| CN220159665U (en) | 2023-12-12 |
| CN219784377U (en) | 2023-10-03 |
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