CN213942696U - Open binary channels reverse osmosis membrane subassembly - Google Patents

Abstract

The utility model provides an open binary channels reverse osmosis membrane subassembly, be in including membrane shell, setting product water jacket, setting in the membrane shell are in water pipe, a plurality of film element are surrounded with the form of membrane bag are produced at the center in the product water jacket and are twined and membrane bag multilayer helical structure and a plurality of interval net that forms are twined produce the water jacket and twine and the interval net multilayer helical structure that forms, every interval net is the upper and lower two-layer structure that forms by a plurality of first shaft-like components and a plurality of second shaft-like components are crossing, the upper and lower two-layer structure of every interval net forms open double-deck runner between two adjacent membrane bags, reducible dislocation of film element reduces the pollutant deposit, reduces the blind angle region in the interval net, can effectively be used for handling the high pollution water source.

Description

Open binary channels reverse osmosis membrane subassembly

Technical Field

The utility model belongs to the sewage is concentrated, purification reverse osmosis membrane subassembly field, concretely relates to binary channels membrane module of open runner and application in the membrane module thereof.

Background

In recent years, the membrane technology is rapidly developed and widely applied to the fields of electric power, metallurgy, petroleum and petrochemical industry, medicine, food, municipal engineering, sewage recycling, seawater desalination and the like, and the demand of various engineering on the membrane technology and equipment thereof is rapidly increased.

The membrane technology is used for treating raw water by methods such as ultrafiltration, reverse osmosis and nanofiltration. The devices using this membrane technology comprise a substantially pressure-resistant membrane housing in which a series of membrane elements are arranged. The membrane shell also comprises an inlet for admitting raw water to be separated into the membrane shell and for discharging pure water (or permeate) and retentate, respectively, from the membrane shell.

US6984321B2 discloses a device for filtering and separating a flowing medium, such as sewage, through a membrane, which device comprises a spacer net with a grid-like structure, which spacer net consists of a number of first rod-like elements and second rod-like elements, and the first rod-like elements have a larger diameter than the second rod-like elements, and the first rod-like elements intersect the second rod-like elements at right angles. By suitable arrangement the first rod-like elements of the spacer mesh are substantially parallel to the central water production pipe, while the raw water flowing through the multi-element spiral structure consisting of membrane bags experiences a negligible small flow resistance when flowing through the second rod-like elements. However, a disadvantage of this arrangement is that the spacer mesh is in relatively large contact with the surface of the bag and there is still a relatively high chance of trapped contaminants remaining on the surface of the bag. In addition, the arrangement also easily causes a telescope phenomenon, and no matter in the membrane bag rolling process or in sewage treatment, the membrane in the reverse osmosis membrane element slides off from the membrane, and the middle of the membrane cylinder wound into a column protrudes, so that the reverse osmosis membrane element structure is loosened, the surface of the membrane is easily scratched, the protruding membrane is easily brought out in the membrane bag rolling process, and the product uniformity, stability and yield are poor.

Chinese patent application CN201611016142.2 sets up open spacer net in the water inlet runner between membrane bag surface, and open spacer net is according to fluid characteristic and diaphragm pressure-bearing requirement, and what contact with membrane bag surface only is bump spacer net, has reduced the contact with membrane surface when playing the supporting role, and the membrane bag is formed by two diaphragms openly back to back bonding, is provided with pure water diversion net in the water production runner between two diaphragms, and the penetrant that filters and obtains flows through pure water diversion net. The salient points are connected by rhombic spacing nets, a rhombic wide open flow channel is formed between two rows of salient point spacing nets on the contact surface of the membrane bag along the water inlet and outlet directions, and water flow enters the flow channel at an angle of 45 degrees with the rhombic spacing nets when in work. The water flow with extremely low resistance is formed in the channel, the flow speed of the surface of the membrane is high, suspended impurities brought in from the inlet water, and inorganic salt and organic matters trapped are not easily blocked, but the membrane elements are discharged along with the water flow of the concentrated water, so that the phenomenon that the trapped pollutants are attached to the surfaces of the inlet channel and the membrane to cause pollution blockage and concentration polarization of the membrane and scaling is effectively avoided. However, as shown in fig. 1, the application adopts a traditional diamond-shaped spacer mesh structure, which is only suitable for a low-pollution system and is not suitable for filtering and separating a high-pollution water source, especially a high-salt high-organic water source. In fig. 1, there are two common forms of diamond-shaped spacer mesh structures. No matter which kind of rhombus interval net structure, ordinary rhombus net all is single flow path, in the in-process of filtering the high polluted water source, in the rhombus interval net that raw water flowed through, though also can produce the water torrent, nevertheless the inflow is the same, need pass through all first shaft-like components and second shaft-like components, resistance loss is big and four angles of rhombus interval net form the dead angle easily, this just makes rhombus interval net appear many dead angle regions, the pollutant remains easily in the dead angle region, it is relatively poor to filter, in addition also often need change rhombus interval net, product life is relatively poor.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects of the prior art, the utility model provides an open type double-channel reverse osmosis membrane assembly, which comprises a membrane shell, a water producing jacket arranged in the membrane shell, a central water producing pipe arranged in the water producing jacket, a membrane bag multilayer spiral structure formed by winding a plurality of membrane elements around the water producing jacket in the form of membrane bags, and a spacer net multilayer spiral structure formed by winding a plurality of spacer nets around the water producing jacket, wherein a penetrating fluid outlet of the membrane bag multilayer spiral structure is connected with a plurality of axial channels of the water producing jacket, a penetrating fluid leaving a penetrating fluid outlet of the membrane bag multilayer spiral structure enters a penetrating fluid inlet of the central water producing pipe through the axial channels and then is discharged from a water producing connector of the central water producing pipe, and the membrane bag multilayer spiral structure and the spacer net multilayer spiral structure are arranged with each other to ensure that any two adjacent membrane bags are separated by one spacer net, each spacer mesh is an upper-lower two-layer structure formed by intersecting a plurality of first rod-shaped elements and a plurality of second rod-shaped elements, the plurality of first rod-shaped elements of each spacer mesh are only contacted with the edge of one membrane bag in two adjacent membrane bags, and the plurality of second rod-shaped elements of each spacer mesh are only contacted with the edge of the other membrane bag in two adjacent membrane bags, so that the upper-lower two-layer structure of each spacer mesh forms an open double-layer flow channel between the two adjacent membrane bags.

Further, the membrane bag is composed of two membrane elements, the peripheral edges of the two membrane elements being connected together.

Further, the plurality of first rod-shaped elements and the plurality of second rod-shaped elements intersect at an angle of 30-60 degrees.

Further, the plurality of first rod-like elements and the plurality of second rod-like elements intersect at an angle of 45 degrees.

Further, the diameter of each first rod-like element and each second rod-like element may or may not be the same.

Further, each first rod-like element and each second rod-like element takes the shape of a circle, but may also take other geometrical shapes.

Further, the arrangement of the multilayer spiral structure of the membrane bag and the multilayer spiral structure of the spacer mesh enables water flow to flow into the double-layer flow channel in each spacer mesh at an angle of 45 degrees.

Further, the length and width of each spacer mesh is substantially the same as each film bag.

Further, each spacer mesh is made of an elastic material.

Furthermore, an upper joint is arranged at one end of the water inlet of the membrane shell, an upper bearing flange is further arranged at one end of the water inlet of the membrane shell, an upper water passing flange is arranged on the inner side of the upper bearing flange, and the upper joint sequentially penetrates through the upper bearing flange and the upper water passing flange and is in butt joint with the front end of the central flow guide pipe of the membrane element.

Furthermore, a lower joint is arranged at one end of a water outlet of the membrane shell, a pressure bearing lower flange is further arranged at one end of the water outlet of the membrane shell, an underwater passing flange is arranged on the inner side of the pressure bearing lower flange, and the lower joint sequentially penetrates through the pressure bearing lower flange and the underwater passing flange and is in butt joint with the tail end of a central flow guide pipe of the membrane element.

The utility model has the advantages that: (1) in the open type double-channel reverse osmosis membrane component, each spacer net is an upper layer structure and a lower layer structure formed by intersecting a plurality of first rod-shaped elements and a plurality of second rod-shaped elements, the upper layer structure and the lower layer structure of each spacer net form an open type double-layer flow channel between two adjacent membrane bags, so that water flowing through the spacer net can generate turbulence and scouring force, and pollutants are deposited on the surfaces of the membrane bags as little as possible; (2) in the open type double-channel reverse osmosis membrane component, each spacer net is an upper layer structure and a lower layer structure formed by intersecting a plurality of first rod-shaped elements and a plurality of second rod-shaped elements, the first rod-shaped elements and the second rod-shaped elements of each spacer net have the same size, so that scratching between membrane elements can be avoided due to dislocation and looseness during rolling, the membrane elements are in the original positions, and the uniformity, stability and yield of products are improved; (3) ordinary rhombus spacer net is single flow channel, though also can produce the water torrent, but the inflow flow direction is the same, need through all first shaft-like component and the shaft-like component of second, the big and four angles of rhombus spacer net of resistance loss form the dead angle easily, only be applicable to low pollution water source and handle, when handling the high water source that pollutes, a lot of dead angle regions appear in the rhombus spacer net, for this reason, the utility model discloses an upper and lower two-layer structure of every spacer net staggers between two adjacent membrane bags, forms intercrossing from top to bottom, the different open two-layer runner of rivers direction, rivers mutual noninterference in these two-layer runner, intake from the beginning, rivers just flow in single certain one deck runner, can effectively avoid the dead angle region to appear, can be used to handle the high water source.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a diamond spacer mesh structure of two common forms;

fig. 2 is a sectional view of the open type net pipe flow passage reverse osmosis membrane module of the present invention;

FIG. 3 is a radial cross-sectional view of the membrane module;

fig. 4 is a plan view on an enlarged scale of the spacer mesh.

Detailed Description

The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.

As shown in figure 1, the open type double-channel reverse osmosis membrane assembly comprises a membrane shell 1, a water production sleeve 2 arranged in the membrane shell 1, a central water production pipe 3 arranged in the water production sleeve 2, and a plurality of membrane elements 4 arranged around the water production sleeve 2, wherein an upper connector 5 is arranged at one end of a water inlet of the membrane shell 1, and a lower connector 6 is arranged at one end of a water outlet of the membrane shell 1.

An upper bearing flange 7 is arranged at one end of a water inlet of the membrane shell 1, an upper water passing flange 8 is arranged on the inner side of the upper bearing flange 7, and sealing rings are arranged between the upper bearing flange 7 and the upper water passing flange 8 and between the membrane shell 1. The upper joint 5 is connected with raw water, sequentially penetrates through the pressure bearing upper flange 7 and the water passing upper flange 8, and is in butt joint with the front end of the central flow guide pipe of the membrane element 4. A sealing ring is arranged between the upper joint 5 and the water passing upper flange 8. The central water production pipe 3 and the water production sleeve 2 extend along the axial direction of the open type double-channel reverse osmosis membrane component. When needed for use, the central water-producing tube 3 is inserted into the inner space 211 of the water-producing jacket 2. When the central water producing pipe 3 has a problem, the central water producing pipe 3 can be taken out from the water producing sleeve 2 for maintenance or replacement.

One end of a water outlet of the membrane shell 1 is provided with a lower bearing flange 9, the inner side of the lower bearing flange 9 is provided with an underwater flange 10, sealing rings are arranged between the lower bearing flange 9 and the membrane shell 4 and between the lower water passing flange 10 and the membrane shell 4, and the lower joint 6 sequentially penetrates through the lower bearing flange 9 and the lower water passing flange 10 and is in butt joint with the tail end of a central guide pipe of the membrane element 4. A sealing ring is arranged between the lower joint 6 and the lower water passing flange 10. The concentrated water generated in the filtering process of the raw water is discharged through the lower joint 6.

One end of the central water production pipe 3 correspondingly penetrates through the upper water flange 8 and the upper pressure-bearing flange 7 to extend outwards, the central water production pipe 3 and the upper pressure-bearing flange 7 are fixed together through a first support nut 11 and a first pressure-bearing nut 12, the first support nut 11 is adjacent to the first pressure-bearing nut 12 and is positioned on the outer side of the first pressure-bearing nut 12, and a central shaft gasket 13 is arranged between the first pressure-bearing nut 12 and the upper pressure-bearing flange 7. The other end of the central water production pipe 3 correspondingly penetrates through the underwater flange 10 and the lower pressure-bearing flange 9 to extend outwards, the central water production pipe 3 and the lower pressure-bearing flange 9 are fixed together through a second supporting nut 14 and a second pressure-bearing nut 15, and the second supporting nut 14 is adjacent to the second pressure-bearing nut 15 and is positioned on the outer side of the second pressure-bearing nut 15. The part of the central water production pipe 3 exposed outside the overwater flange 8 and the overwater flange 10 is a water production joint 16, and permeate produced in the filtering process of raw water is discharged through the water production joint 16.

During the rolling process, a plurality of membrane elements 4 are wound around the water producing jacket 2 in the form of membrane bags 41 to form a membrane bag multilayer spiral structure 42, and further, a plurality of spacer meshes 17 are wound around the water producing jacket 2 to form a spacer mesh multilayer spiral structure 43.

As shown in fig. 3, the membrane bag multilayer spiral structure 42 comprises 18 membrane bags 41, and the number of the membrane bags 41 can be adjusted according to actual needs. The permeate outlet 421 of the membrane bag multilayer spiral structure 42 is connected to the axial passage 210 of the water jacket 2. Permeate leaving the permeate outlet 421 of the membrane bag multilayer spiral structure 42 flows into the axial channels 210 of the water production jacket 2 and through these axial channels 210 into the permeate inlet 310 of the central water production pipe 3 and then out of the water production connection 16. A plurality of axial channels 210 are provided in the water jacket 2, the number of axial channels 210 being adjustable according to the length of the membrane bag 41 to ensure a uniform discharge of permeate leaving the membrane bag 41. Each membrane bag 41 consists of two membrane elements 4, which two membrane elements 4 are connected at their peripheral edges in a known manner, for example by ultrasonic treatment or by means of a suitable adhesive.

As shown in fig. 3, the spacer mesh multilayer spiral structure 43 comprises 18 spacer meshes 17, the number of the spacer meshes 17 is matched with the number of the film bags 41, and the number of the spacer meshes 17 can be adjusted according to actual needs. The spacer mesh 17 is shown in dashed lines and the membrane bag 41 in solid lines. During rolling, the film bag multilayer spiral 42 and the spacer mesh multilayer spiral 43 should be aligned with each other to ensure that any two adjacent film bags 41 are separated by one spacer mesh 17. The length and width of each spacer mesh 17 is substantially the same as the film bag 41.

As shown in fig. 4, the structure of each spacer mesh 17 has a lattice-like structure. The lattice-like structure of each spacer net 17 is formed of a plurality of first rod-like elements 171 and a plurality of second rod-like elements 172, the second rod-like elements 172 being disposed on the first rod-like elements 171, and they intersect at 30 to 60 degrees (preferably 45 degrees), thereby forming an upper and lower two-layer structure. The diameter of the first rod member 171 is the same as the diameter of the second rod member 172. The first rod-like member 171 and the second rod-like member 172 are substantially circular, but may take other shapes as long as the water flow through the membrane bag 41 in the membrane bag multilayer spiral structure 42 generates turbulence. The spacer mesh 17 is made of an elastic material, such as an elastomer resin.

As shown in fig. 4, after the rolling process of the spacer mesh 17 and the film bags 41 is finished, it should be ensured that the spacer mesh 17 disposed between the adjacent film bags 41 is in contact with the edges of the adjacent film bags 41, thereby preventing the adjacent film bags 41 from being in direct contact. Considering that each spacer mesh 17 is a two-layer structure, in any adjacent two film bags 41 separated by one spacer mesh 17, the first rod-shaped elements 171 of the spacer mesh 17 are in contact with only the edge of one of the film bags 41, and the second rod-shaped elements 172 of the spacer mesh 17 are in contact with only the edge of the remaining one of the film bags 41, so that the two-layer structure of each spacer mesh 17 forms an open two-layer flow passage between the adjacent film bags 41. The arrangement of the membrane bag multilayer spiral structure 42 and the spacer screen multilayer spiral structure 43 ensures that the water flow enters the double-layer flow channels in the spacer screen 17 at an angle of 45 degrees, i.e. a part of the water flow passing through the spacer screen 17 flows along the first rod-shaped elements 171, i.e. the first flow channels 18, and a part of the water flow passing through the spacer screen 17 flows along the second rod-shaped elements 172, i.e. the second flow channels 19, and ensures that the water flow passing through the spacer screen 17 generates turbulence and scouring force and that as little contaminants as possible are deposited on the surface of the membrane bag 41. The upper layer and the lower layer of the structure of each spacer net 17 are staggered to form two layers of flow channels which are crossed up and down and have different water flow directions, water flows only flow in a single certain flow channel from the beginning, and the water flows in different flow channels are not interfered with each other, so that the problems that the water flows in the common rhombic grids of a single flow channel are the same, all the first rod-shaped elements and all the second rod-shaped elements need to pass, the resistance loss is large, and dead angles are easily formed are solved. The permeate flowing through the first flow channels 18 and the second flow channels 19 flows through the permeate outlet 421 of the membrane bag multilayer spiral structure 42 into the axial channels 210 of the water production jacket 2 and further through these axial channels 210 into the permeate inlet 310 of the central water production pipe 3 and then out of the water production connection 16.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. An open, two-pass reverse osmosis membrane module comprising a membrane shell, a water-producing jacket disposed within the membrane shell, a central water-producing tube disposed within the water-producing jacket, a membrane bag multilayer helix formed by wrapping a plurality of membrane elements in the form of membrane bags around the water-producing jacket, and a spacer net multilayer helix formed by wrapping a plurality of spacer nets around the water-producing jacket, wherein permeate outlets of the membrane bag multilayer helix are connected to a plurality of axial channels of the water-producing jacket, permeate exiting the permeate outlets of the membrane bag multilayer helix passing through the axial channels into a permeate inlet of the central water-producing tube and then out of a water-producing connection of the central water-producing tube, the arrangement of the membrane bag multilayer helix and the spacer net multilayer helix being such that any two adjacent membrane bags are separated by a spacer net, each spacer mesh is an upper-lower two-layer structure formed by intersecting a plurality of first rod-shaped elements and a plurality of second rod-shaped elements, the plurality of first rod-shaped elements of each spacer mesh are only contacted with the edge of one membrane bag in two adjacent membrane bags, and the plurality of second rod-shaped elements of each spacer mesh are only contacted with the edge of the other membrane bag in two adjacent membrane bags, so that the upper-lower two-layer structure of each spacer mesh forms an open double-layer flow channel between the two adjacent membrane bags.

2. The open, dual channel reverse osmosis membrane module of claim 1, wherein the membrane bag is comprised of two membrane elements joined together at their peripheral edges.

3. The open two-channel reverse osmosis membrane module of claim 1, wherein the first plurality of rod-like elements and the second plurality of rod-like elements intersect at an angle of 30 to 60 degrees.

4. The open, dual channel reverse osmosis membrane module of claim 3, wherein the angle is 45 degrees.

5. The open, two-pass reverse osmosis membrane module of claim 1, wherein the arrangement of the multi-layer helix of membrane pockets and the multi-layer helix of spacer screens is such that the water flows into the double-layer flow channels in each spacer screen at an angle of 45 °.

6. The open, two-pass reverse osmosis membrane module of claim 1, wherein each spacer screen has a length and width that are substantially the same as each membrane bag.

7. The open, dual channel reverse osmosis membrane module of claim 1, wherein each spacer screen is made of an elastic material.

8. The open type dual-channel reverse osmosis membrane module as claimed in claim 1, wherein an upper joint is arranged at one end of the water inlet of the membrane shell, a pressure bearing upper flange is further arranged at one end of the water inlet of the membrane shell, an upper water passing flange is arranged at the inner side of the pressure bearing upper flange, and the upper joint sequentially penetrates through the pressure bearing upper flange and the upper water passing flange to be in butt joint with the front end of the central flow guide pipe of the membrane element.

9. The open type dual-channel reverse osmosis membrane module as claimed in claim 1, wherein a lower joint is arranged at one end of the water outlet of the membrane shell, a pressure bearing lower flange is further arranged at one end of the water outlet of the membrane shell, an underwater passing flange is arranged at the inner side of the pressure bearing lower flange, and the lower joint sequentially penetrates through the pressure bearing lower flange and the underwater passing flange to be in butt joint with the tail end of the central flow guide pipe of the membrane element.

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