CN212819171U

CN212819171U - Nanofiltration membrane element with low impedance pollution

Info

Publication number: CN212819171U
Application number: CN202020859141.XU
Authority: CN
Inventors: 南晓东; 高峰
Original assignee: Nanjing Quanmo Technology Co ltd
Current assignee: Nanjing Quanmo Technology Co ltd
Priority date: 2020-05-20
Filing date: 2020-05-20
Publication date: 2021-03-30
Anticipated expiration: 2030-05-20

Abstract

The utility model discloses a low impedance pollution receives filter membrane component, include the center tube and receive filter membrane group, receive filter membrane group winding on the center tube, a plurality of inlet openings have been seted up on the pipe wall of center tube, receive filter membrane group including producing rivers and leading cloth, dense rivers guidance tape and receive the filter membrane, it leads the cloth ring around covering outside the center tube to produce rivers, every two adjacent produce rivers and lead and be equipped with one between the cloth and receive the filter membrane, receive filter membrane along the axis face fifty percent discount of center tube in opposite directions, the opposite folding edge of receiving filter membrane is close to the center tube setting, dense rivers guidance tape sets up between the opposite folding edge of receiving filter membrane, dense rivers guidance tape is crooked, wave dense rivers guidance tape and receive and be formed with half-circular arc's passageway between the filter membrane, receive filter membrane and adjacent production rivers lead the both sides limit of cloth and keep away from one side of center tube scribble. The utility model discloses a low impedance pollution nanofiltration membrane element, concentrated water flows along the passageway, and the pollutant is difficult for adhering to, can effectively improve the antipollution performance and the life of nanofiltration membrane element.

Description

Nanofiltration membrane element with low impedance pollution

Technical Field

The utility model relates to a water treatment technical field especially relates to a low impedance pollution nanofiltration membrane element.

Background

At present, the nanofiltration membrane element is mostly manufactured by a rolling process, namely, the nanofiltration membrane bag embedded with a concentrated water grid is overlapped to form a nanofiltration membrane group which is wound and rolled on a central pipe. One end of the side surface of the nanofiltration membrane element formed by rolling in the method is filled with raw water, the raw water is purified by the membrane under the action of pressure, the produced water flows through the produced water guide cloth from the inside of the membrane bag and is collected to the central pipe with holes to flow out, and unfiltered concentrated water flows out from the side surface of the membrane element, but the water flow speed in the membrane element is low, pollutants in the water are easy to deposit on the surface of the membrane, the water flux of the membrane element is reduced, and finally the service life of the membrane element is shortened.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is:

the water flow speed in the nanofiltration membrane element is low, pollutants in water are easy to deposit on the surface of the membrane, the water flux of the membrane element is reduced, and the service life of the membrane element is shortened.

In order to solve the problem, the utility model adopts the following technical scheme:

a nanofiltration membrane element with low impedance pollution comprises a central tube and a plurality of nanofiltration membrane groups, wherein the nanofiltration membrane groups are wound on the central tube, a plurality of water inlet holes are formed in the tube wall of the central tube, each nanofiltration membrane group comprises a product water flow guide cloth, a concentrated water flow passage plate and a nanofiltration membrane, the product water flow guide cloth is wound around the central tube, one nanofiltration membrane is arranged between every two adjacent product water flow guide cloths, the nanofiltration membrane is oppositely folded along the axis film surface of the central tube, the opposite folding edge of the nanofiltration membrane is close to the central tube, the concentrated water flow passage plate is arranged between the opposite folding surfaces of the nanofiltration membrane and is of a bent wave-shaped structure, a semicircular arc-shaped channel is formed between the concentrated water flow passage plate and the nanofiltration membrane, and the height of the channel is 1-10mm, the distance between the two channel peaks is 1-10mm, and the nanofiltration membrane, two sides of the adjacent water flow guide cloth and one side far away from the central pipe are coated with sealing glue.

Further, the number of nanofiltration membrane groups is two, three, five or ten.

Furthermore, the water inlet holes are provided with four groups, each group of water inlet holes is twelve, and the water inlet holes are uniformly distributed on the periphery of the pipe wall of the central pipe and are communicated with the inner cavity of the central pipe.

Furthermore, the low-resistance and anti-pollution nanofiltration membrane element further comprises a shell, a water inlet cover and a water outlet cover, wherein the shell is sleeved outside the nanofiltration membrane group, the water inlet cover and the water outlet cover are respectively arranged at two ends of the shell, and two ends of the central tube extend out of the shell and are respectively fixed with the water inlet cover and the water outlet cover.

Furthermore, the shell is made of glass fiber.

Furthermore, a plurality of water inlets which are uniformly distributed are formed in the water inlet cover, and the water inlets are communicated with the channel.

Further, the water inlet has eight.

Furthermore, a plurality of concentrated water outlets and a water production outlet which are uniformly distributed are formed in the water outlet cover, the concentrated water outlets are communicated with the channel, and the water production outlets are communicated with the inner cavity of the central pipe.

Further, the concentrated water outlet has eight.

The utility model has the advantages that:

the utility model discloses a low impedance pollution nanofiltration membrane element, it has a plurality of rivers of producing to lead cloth to coil on the center tube, it strains the diaphragm to produce to be equipped with between the rivers lead cloth, it encircles in the center tube and follows the axis face fifty percent discount of center tube to receive the diaphragm, it is equipped with dense rivers guidance tape to receive between the fifty percent discount face of diaphragm to strain, dense rivers guidance tape is crooked wave, be formed with half-circular arc's passageway between the diaphragm is strained to crooked dense rivers guidance tape and fifty percent discount, concentrated water flows along the passageway, the resistance is little, the velocity of flow is fast, the pollutant is difficult for adhering to the jam, can effectively improve the antipollution performance and the life who strains the membrane element.

Drawings

Fig. 1 is a schematic structural view of a nanofiltration membrane element with low impedance pollution of the utility model;

fig. 2 is a front view of a water inlet cover in the low-resistance and anti-contamination nanofiltration membrane element shown in fig. 1;

fig. 3 is a front view of a water outlet cover in the low-resistance and anti-contamination nanofiltration membrane element shown in fig. 1;

fig. 4 is a schematic structural diagram of a central tube and a nanofiltration membrane group in the low-resistance and anti-pollution nanofiltration membrane element shown in fig. 1;

FIG. 5 is a schematic view showing the connection between the central tube and the produced water drainage cloth shown in FIG. 4;

fig. 6 is a schematic view showing a connection relationship between the nanofiltration membrane sheet and the concentrate flow channel plate shown in fig. 4;

fig. 7 is a schematic cross-sectional view of a nanofiltration membrane sheet and a concentrate flow channel plate of the nanofiltration membrane module shown in fig. 6;

fig. 8 is a schematic structural view of the concentrated water flow field plate shown in fig. 6.

In the figure: 100. the low-resistance and anti-pollution nanofiltration membrane element comprises a central tube 1, a nanofiltration membrane group 2, a nanofiltration membrane group 3, a shell 4, a water inlet cover 5, a water outlet cover 6, sealant 11, a water inlet hole 21, a product water flow guide cloth 22, a concentrated water flow channel plate 23, a nanofiltration membrane 41, a water inlet 51, a concentrated water outlet 52, a product water outlet and a 221 channel.

Detailed Description

The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and merely illustrates the basic structure of the present invention in a schematic manner, and therefore it shows only the constitution related to the present invention.

As shown in fig. 1 to 7, the utility model provides a low impedance pollution receives filter membrane component 100, receive filter membrane component 100 including center tube 1, receive filter membrane group 2, shell 3, intake cover 4 and play water cover 5, it has the multiunit to receive filter membrane group 2, it all coils on center tube 1 to receive filter membrane group 2 to receive every group, shell 3 cover is located center tube 1 and is received outside filter membrane group 2, intake cover 4 and play water cover 5 are installed respectively at shell 3's both ends, the both ends of center tube 1 stretch out shell 3 and fixed with intake cover 4 and play water cover 5 at shell 3 both ends respectively, in this embodiment, the quantity that receives filter membrane group 2 is two, three, five or ten, the material of shell 3 is glass fiber.

The pipe wall of the central pipe 1 is provided with a plurality of water inlet holes 11, the water inlet holes 11 are uniformly distributed around the pipe wall of the central pipe 1 and are communicated with the inner cavity of the central pipe 1, in this embodiment, the water inlet holes 11 are four groups, and each group of the water inlet holes 11 has twelve.

The nanofiltration membrane group 2 comprises a water production flow guide cloth 21, the nanofiltration membrane 23 surrounds and wraps the central tube 1, a nanofiltration membrane 23 is arranged between every two adjacent water flow guide cloths 21, the nanofiltration membrane 23 surrounds and wraps the central tube 1 and oppositely folds along the axis film surface of the central tube 1, the folded edges of the nanofiltration membrane 23 are arranged at one side of the connecting part of the adjacent water flow guide cloths 21 and the central tube 1, the concentrated water flow channel plate 22 is arranged between the two folded surfaces of the nanofiltration membrane 23, the concentrated water flow channel plate 22 is in a bent wave shape, a semicircular arc-shaped channel 221 is formed between the bent concentrated water flow channel plate 22 and the folded nanofiltration membrane 23, the height of the channel 221 is 1-10mm, the interval between the vertexes of the two channels 221 is 1-10mm, and a sealant 6 which is glued between the nanofiltration membrane 23 and the two side edges of the adjacent water flow guide cloths 21 and the side far away from the central tube 1.

The water inlet cover 4 is provided with a plurality of uniformly distributed water inlets 41, the water inlets 41 are communicated with the channel 221, and in this embodiment, the number of the water inlets 41 is eight. The outlet cover 5 is provided with a plurality of uniformly distributed concentrated water outlets 51 and a produced water outlet 52, the concentrated water outlets 51 are communicated with the channel 221, the produced water outlet 52 is communicated with the inner cavity of the central tube 1, in this embodiment, the number of the concentrated water outlets 51 is eight.

During installation, a plurality of water flow guiding cloths 21 are uniformly fixed on the central tube 1 along the circumferential direction of the central tube 1, two ends of the central tube 1 are fixed by a rotatable clamp, membrane surfaces of a plurality of nanofiltration membranes 23 are oppositely folded to form a hinge, a concentrated water flow channel plate 22 is arranged between two folded layers of each nanofiltration membrane 23, the treated nanofiltration membranes 23 and the treated concentrated water flow channel plates 22 are inserted between the water flow guiding cloths 21 at intervals, wherein the folded ends of the nanofiltration membranes 23 are positioned in a gap between the water flow guiding cloths 21 and are close to the central tube 1, and the operation is repeated until a plurality of groups of nanofiltration membranes 23 are all plugged into the central tube 1. In the process of plugging the nanofiltration membrane 23, three sides of the outer side of the bonding area of the nanofiltration membrane 23 and the water flow guide cloth 21 are coated with the sealant 6, and the side, close to the central tube 1, of the nanofiltration membrane 23 and the water flow guide cloth 21 is not coated with the sealant, and the operations are repeated. After the completion, the produced water flow guide cloth 21, the concentrated water flow channel plate 22 and the nanofiltration membrane 23 are wound on the central tube 1, and are placed in the shell 3 after the winding is completed, and the water inlet cover 4 and the water outlet cover 5 are respectively fixed at two ends of the shell 3.

When the membrane element is used, raw water enters from a channel 221 formed by the concentrated water flow channel plate 22 and the nanofiltration membrane 23 through the water inlet 41 on the water inlet cover 4, the edge of the produced water flow guide cloth 21 and the nanofiltration membrane 23 are bonded by the sealant 6, and the sealant 6 is not arranged between the nanofiltration membrane 23 and the concentrated water flow channel plate 22, so that the raw water can only enter the membrane element 100 from the space between the concentrated water flow channel plate 22 and the nanofiltration membrane 23, at the moment, part of the raw water passes through the folded nanofiltration membrane 23 and enters the produced water flow guide cloth 21, then flows into the inner cavity of the central tube 1 through the water inlet hole 11 on the central tube 1 along the direction of the produced water flow guide cloth 21, and flows out from the end part of the central tube 1 through the produced water outlet 52. The unfiltered water between the nanofiltration membrane 23 and the concentrated water flow channel plate 22 flows out from the concentrated water outlet 52 on the water outlet cover 5 through the channel 221 to form concentrated water.

The utility model discloses a low impedance pollution receives filter membrane component 100, it has a plurality of rivers of producing to lead cloth 21 to coil on the center tube 1, it receives to be equipped with between the water conservancy diversion cloth 21 and receives and strains diaphragm 23 to produce, receive and strain diaphragm 23 and encircle the cladding in the center tube 1 outside and along the axis face fifty percent discount of center tube 1 in opposite directions, it is equipped with dense rivers guidance tape 22 to receive between the fifty percent discount face of diaphragm 23, dense rivers guidance tape 22 is crooked wave, be formed with half-circular arc's passageway 221 between the nanofiltration diaphragm 23 of crooked dense rivers guidance tape 22 and fifty percent discount, passageway 221 surface is smooth, the resistance is little when concentrated water flows along passageway 221, the velocity of flow is fast, the pollutant is difficult for adhering to, difficult jam, can effectively improve the antipollution performance and the life of receiving filter membrane component.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A nanofiltration membrane element with low impedance pollution is characterized by comprising a central tube and a plurality of nanofiltration membrane groups, wherein the nanofiltration membrane groups are wound on the central tube, a plurality of water inlet holes are formed in the tube wall of the central tube, each nanofiltration membrane group comprises a produced water flow guide cloth, a concentrated water flow passage plate and a nanofiltration membrane, the produced water flow guide cloth is wound around the central tube, one nanofiltration membrane is arranged between every two adjacent produced water flow guide cloths, the nanofiltration membranes are oppositely folded along the axial line membrane surface of the central tube, the folded edges of the nanofiltration membranes are arranged close to the central tube, the concentrated water flow passage plates are arranged between the folded surfaces of the nanofiltration membranes, the concentrated water flow passage plates are of a bent wave-shaped structure, a semicircular arc-shaped passage is formed between each concentrated water flow passage plate and the nanofiltration membranes, and the height of the passage is 1-10mm, the distance between the two channel peaks is 1-10mm, and the nanofiltration membrane, two sides of the adjacent water flow guide cloth and one side far away from the central pipe are coated with sealing glue.

2. The nanofiltration membrane element of claim 1, wherein the number of nanofiltration membrane modules is two, three, five or ten.

3. The nanofiltration membrane element of claim 1, wherein the number of inlet openings is four, and twelve inlet openings are provided in each group, and the inlet openings are uniformly distributed around the walls of the central tube and communicate with the inner cavity of the central tube.

4. The low impedance contamination nanofiltration membrane element of claim 1, further comprising a housing, a water inlet cover and a water outlet cover, wherein the housing is sleeved outside the nanofiltration membrane group, the water inlet cover and the water outlet cover are respectively mounted at two ends of the housing, and two ends of the central tube extend out of the housing and are respectively fixed with the water inlet cover and the water outlet cover.

5. The nanofiltration membrane element of claim 4, wherein the outer shell is made of glass fiber.

6. The nanofiltration membrane element of claim 4, wherein the inlet cover is provided with a plurality of uniformly distributed inlets, and the inlets are communicated with the channels.

7. The nanofiltration membrane element of claim 6, wherein the number of the water inlets is eight.

8. The nanofiltration membrane element of claim 4, wherein the outlet cover is provided with a plurality of uniformly distributed concentrated water outlets and a water outlet, the concentrated water outlets are communicated with the channel, and the water outlet is communicated with the inner cavity of the central tube.

9. The low impedance contamination nanofiltration membrane element of claim 8, wherein the concentrated water outlet comprises eight.