CN212174708U - Low-pressure nanofiltration water purification membrane - Google Patents

Abstract

The utility model discloses a low pressure is received and is strained water purification membrane, the raw water flow that treats the purification is flowed through the collector pipe, first filtration stratum reticulare carries out the prefilter to the impurity of aquatic, and water after the prefilter is through a plurality of the hole of permeating water permeates in proper order extremely chitin stratum reticulare the second filtration stratum reticulare with receive the filtration stratum reticulare, the impurity in the raw water is strained once more to chitin stratum reticulare, the second filters the impurity of stratum reticulare to the aquatic and carries out the fine filtration, passes through at last receive the filtration membrane layer and carry out receive the filtration purification treatment to this filtration performance who has improved this water purification membrane greatly.

Description

A low pressure nanofiltration water purification membrane

technical field

The utility model relates to the technical field of water purification membranes, in particular to a low-pressure nanofiltration water purification membrane.

Background technique

The pore size of the nanofiltration membrane is more than 1nm, generally 1-2nm. It is a functional semipermeable membrane that allows solvent molecules or some low molecular weight solutes or low valent ions to pass through. It is a special and promising type of separation membrane. It is named because the size of the intercepted material is about nanometers. At present, nanofiltration membranes are often used in the field of water purification. The filtering precision needs to be improved.

Utility model content

The purpose of the utility model is to provide a low-pressure nanofiltration water purification membrane, which aims to solve the technical problem of the low filtration precision of the nanofiltration membrane in the prior art.

In order to achieve the above purpose, a low-pressure nanofiltration water purification membrane adopted by the present invention includes a cylinder body, a cover body, a water collecting pipe, a first filter screen layer, a chitin screen layer, a second filter screen layer, and a nanofilter screen layer. and a water outlet pipe, the cover body is detachably connected to the cylinder body, one end of the water collecting pipe penetrates the cover body and is inserted into the interior of the cylinder body, and the side wall of the water collecting pipe has a plurality of permeable water pipes The first filter mesh layer is placed inside the water collection pipe, and the chitin mesh layer, the second filter mesh layer and the nanofiltration mesh layer are sequentially wrapped on the collection pipe from the inside to the outside. the outside of the water pipe, and a water storage cavity is formed between the nano filter mesh layer and the inner wall of the cylinder, the water outlet pipe is communicated with the water storage cavity, and is located at the end of the cylinder away from the water collection pipe .

Wherein, the low-pressure nanofiltration water purification membrane further includes an installation ring, the installation ring has a first ring body groove, a second ring body groove and a third ring body groove, and the installation ring passes through the first ring body The groove is threadedly connected with the water collecting pipe, and one side of the first filter screen layer is fixedly connected with the mounting ring and is placed inside the groove of the third ring body.

Wherein, the low-pressure nanofiltration water purification membrane further includes a diversion mesh layer, one side of the diversion mesh layer is fixedly connected with the installation ring, and is placed inside the second ring groove, and the diversion mesh layer is The mesh layer is placed between the first filter mesh layer and the inner side wall of the water collecting pipe.

Wherein, the low-pressure nanofiltration water purification membrane further includes a water permeable mesh layer, and the water permeable mesh layer is placed between the second filter mesh layer and the nanofiltration mesh layer.

Wherein, activated carbon particles are filled between the second filter screen layer and the water-permeable screen layer, and between the nano-filter screen layer and the water-permeable screen layer.

Wherein, the low-pressure nanofiltration water purification membrane further comprises a first connecting piece and a second connecting piece, and both ends of the first connecting piece are respectively fixedly connected with the second filter screen layer and the permeable net layer, and It is located between the second filter screen layer and the water permeable screen layer, and both ends of the second connecting sheet are fixedly connected to the nanofilter screen layer and the water permeable screen layer, respectively, and are located in the nanofilter screen. between the layer and the water-permeable mesh layer.

Wherein, the nanofiltration mesh layer includes a support layer, a porous carrier layer, a nanofiltration membrane layer and a protective layer, the porous carrier layer is fixedly connected with the support layer, and is covered on the outside of the support layer, the The nanofiltration membrane layer is fixedly connected with the porous carrier layer and is covered on the outside of the porous carrier layer, and the protective layer is fixedly connected with the nanofiltration membrane layer and is covered on the outer surface of the nanofiltration membrane layer. external.

The beneficial effect of the utility model is reflected in: the raw water to be purified flows through the water collecting pipe, the first filter screen layer performs preliminary filtering on impurities in the water, and the water after preliminary filtering penetrates sequentially through a plurality of the water permeable holes To the chitin mesh layer, the second filter mesh layer and the nanofiltration mesh layer, the chitin mesh layer filters and blocks the impurities in the raw water again, and the second filter mesh layer purifies the impurities in the water. Filtration, and finally nanofiltration purification treatment through the nanofiltration membrane layer, thereby greatly improving the filtration performance of the water purification membrane.

Description of drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are just some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

FIG. 1 is a schematic structural diagram of the low-pressure nanofiltration water purification membrane of the present invention.

2 is a cross-sectional view of the internal structure of the low-pressure nanofiltration water purification membrane of the present invention.

3 is a partial structural cross-sectional view of the low-pressure nanofiltration water purification membrane of the present invention.

FIG. 4 is a cross-sectional view of the structure of the nanofiltration screen layer of the present invention.

100-low pressure nanofiltration water purification membrane, 10-cylinder, 11-cover, 12-water collection pipe, 121-permeable hole, 13-first filter screen layer, 14-chitin screen layer, 15-second filter screen layer, 16-nanofiltration mesh layer, 161-support layer, 162-porous carrier layer, 163-nanofiltration membrane layer, 164-protective layer, 165-sterilization layer, 17-water outlet pipe, 18-water storage cavity, 19- Installation ring, 191-first ring groove, 192-second ring groove, 193-third ring groove, 20-guiding mesh layer, 21-water permeable mesh layer, 22-activated carbon particles, 23-first connection piece, 24 - the second connecting piece.

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to be used to explain the present invention, but should not be construed as a limitation of the present invention.

In the description of the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical" , "horizontal", "top", "bottom", "inside", "outside" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, only for the convenience of describing the present utility model and simplifying the description, Rather than indicating or implying that the indicated device or element must have a particular orientation, be constructed and operate in a particular orientation, it should not be construed as a limitation of the present invention. In addition, in the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.

1 to 4, the present invention provides a low-pressure nanofiltration water purification membrane 100, including a cylinder body 10, a cover body 11, a water collecting pipe 12, a first filter mesh layer 13, a chitin mesh layer 14, a first Two filter mesh layers 15 , nano filter mesh layers 16 and a water outlet pipe 17 , the cover body 11 is detachably connected to the cylinder body 10 , and one end of the water collecting pipe 12 penetrates the cover body 11 and is inserted into the cylinder Inside the body 10, the water collecting pipe 12 has a plurality of permeable holes 121 on the side wall, the first filter mesh layer 13 is placed inside the water collecting pipe 12, the chitin mesh layer 14, the first filter mesh layer 13 The second filter mesh layer 15 and the nanofilter mesh layer 16 are sequentially wrapped on the outside of the water collecting pipe 12 from the inside to the outside, and a water storage is formed between the nanofilter mesh layer 16 and the inner wall of the cylinder 10 . Cavity 18 , the water outlet pipe 17 communicates with the water storage cavity 18 and is located at the end of the cylinder 10 away from the water collecting pipe 12 .

In this embodiment, the interior of the cylinder body 10 is a cavity structure, the upper end surface wall of the cylinder body 10 has threads, and the inner surface wall of the cover body 11 also has threads, so as to realize the above The threaded connection between the cover body 11 and the cylinder body 10, the cover body 11 has a through hole for the water collecting pipe 12 to pass through, the first filter screen layer 13 is a porous Ti film, and the first filter screen layer 13 is a porous Ti film. The second filter layer 15 is a nano-photocatalyst, and the nano-photocatalyst material is TiO ₂ . The mesh of the first filter layer 13 is larger than the mesh of the second filter layer 15 .

When the raw water needs to be purified, that is, when the raw water to be purified flows through the water collecting pipe 12, the first filter screen layer 13 preliminarily filters the impurities in the water, and filters the particles and bacteria with larger diameters, so as to remove the impurities in the water. In addition to improving the turbidity of the water, the surface of the Ti film will increase the positive charge and strengthen the adsorption during the water purification process, because most of the ions and microorganisms in the water are negatively charged; the water after preliminary filtration passes through many Each of the permeable holes 121 penetrates into the chitin mesh layer 14 , the second filter mesh layer 15 and the nanofiltration mesh layer 16 in sequence, and the chitin mesh layer 14 filters the impurities in the raw water again, so The second filter screen layer 15 performs fine filtering of impurities in the water. Because the second filter screen layer 15 is a nano-photocatalyst material TiO ₂ , under the catalysis of light, some short-term highly active oxidants are generated, such as: H2O2, O3, etc., can oxidize and decompose the refractory organic matter, water pathogens and appendages left after chlorine disinfection in polluted water into biodegradable compounds, and finally mineralize into harmless carbon dioxide and water, thus improving the filtration of the water purification membrane. Finally, nanofiltration purification treatment is carried out through the nanofiltration membrane layer 163, which greatly improves the filtration performance of the water purification membrane, and the water filtered and purified through the nanofiltration membrane layer 163 penetrates into the storage tank. In the water cavity 18, the water in the water storage cavity 18 flows out through the water outlet pipe 17, so as to complete the filtration and purification. The solid impurities and pollutants are removed from the raw water before the raw water reaches the nanofiltration membrane layer 163 through the cooperation between the first filter mesh layer 13 , the chitin mesh layer 14 and the second filter mesh layer 15 . Effective filtration is performed to prevent impurities from contacting the nanofiltration membrane layer 163 to cause pollution and blockage of the nanofiltration membrane layer 163 , thereby reducing the influence of impurities on the efficiency of the filtration work of the nanofiltration membrane layer 163 .

Further, the low-pressure nanofiltration water purification membrane 100 further includes an installation ring 19, and the installation ring 19 has a first annular groove 191, a second annular groove 192 and a third annular groove 193. 19 is threadedly connected to the water collecting pipe 12 through the first ring groove 191 , and one side of the first filter layer 13 is fixedly connected to the mounting ring 19 and placed in the third ring groove 193 internal.

In this embodiment, the first ring groove 191 is internally provided with threads, the mounting ring 19 is threadedly connected to the water inlet port of the water collecting pipe 12 through the first ring groove 191 , and the first ring groove 191 is threaded. One end of a filter screen layer 13 is disposed inside the third annular groove 193 , and the rest of the first filter screen layer 13 is disposed inside the water collecting pipe 12 . When the first filter screen layer 13 has been used for a long time and needs to be replaced, it is only necessary to unscrew the mounting ring 19 from the water collecting pipe 12, and then replace it with a new one with the first filter screen layer 13. The installation ring 19 is sufficient, and the quick replacement of the first filter screen layer 13 can be easily realized, thereby bringing convenience to the user.

Further, the low-pressure nanofiltration water purification membrane 100 further includes a guide mesh layer 20 , one side of the guide mesh layer 20 is fixedly connected with the mounting ring 19 and is placed inside the second ring groove 192 , and the guide mesh layer 20 is placed between the first filter mesh layer 13 and the inner side wall of the water collecting pipe 12 .

In this embodiment, one end of the guide mesh layer 20 is disposed inside the second annular groove 192 . By disposing the guide mesh layer 20 on the first filter mesh layer 13 and the Between the inner side walls of the water collection pipes 12, the raw water preliminarily filtered by the first filter screen layer 13 can permeate more quickly from the plurality of the water permeable holes 121 to play a diversion role, thereby indirectly speeding up the cleaning process. The water purification rate of the water film.

Further, the low pressure nanofiltration water purification membrane 100 further includes a water permeable mesh layer 21 , and the water permeable mesh layer 21 is placed between the second filter mesh layer 15 and the nanofiltration mesh layer 16 .

In this embodiment, the water permeable mesh layer 21 is disposed between the second filter mesh layer 15 and the nanofiltration mesh layer 16, which can accelerate the water permeation rate, thereby indirectly accelerating the water purification membrane water purification rate.

Further, activated carbon particles 22 are filled between the second filter mesh layer 15 and the water permeable mesh layer 21 and between the nanofilter mesh layer 16 and the water permeable mesh layer 21 .

In this embodiment, the activated carbon particles are filled between the second filter mesh layer 15 and the water permeable mesh layer 21 and between the nanofiltration mesh layer 16 and the water permeable mesh layer 21 . 22. Since the activated carbon particles 22 have a good adsorption effect, they can more adsorb impurities in the water, as well as decolorize and remove odors from water, so as to better filter and purify water. The effect is to improve the purification efficiency of the water purification membrane.

Further, the low-pressure nanofiltration water purification membrane 100 further includes a first connecting sheet 23 and a second connecting sheet 24, and the two ends of the first connecting sheet 23 are respectively connected with the second filter screen layer 15 and the water permeable sheet. The mesh layer 21 is fixedly connected and located between the second filter mesh layer 15 and the water permeable mesh layer 21, and the two ends of the second connecting sheet 24 are respectively connected to the nanofilter mesh layer 16 and the permeable mesh. The layer 21 is fixedly connected and located between the nanofiltration mesh layer 16 and the water permeable mesh layer 21 .

In this embodiment, the number of the first connecting piece 23 and the number of the second connecting piece 24 is at least four, and a plurality of the first connecting piece 23 are distributed on the second filter screen layer in a circle. 15 and the water permeable mesh layer 21 , a plurality of the second connecting sheets 24 are circumferentially distributed between the nanofiltration mesh layer 16 and the water permeable mesh layer 21 . A plurality of the first connecting sheets 23 can increase the structural connection strength between the second filter mesh layer 15 and the water permeable mesh layer 21 , and a plurality of the second connecting sheets 24 can increase the nanofiltration mesh layer Structural connection strength between 16 and the water permeable mesh layer 21 .

Further, the nanofiltration mesh layer 16 includes a support layer 161, a porous carrier layer 162, a nanofiltration membrane layer 163 and a protective layer 164, and the porous carrier layer 162 is fixedly connected to the support layer 161 and is coated on the The outer part of the support layer 161, the nanofiltration membrane layer 163 is fixedly connected with the porous carrier layer 162, and is covered on the outer part of the porous carrier layer 162, and the protective layer 164 is connected to the nanofiltration membrane layer 163. It is fixedly connected and covered on the outside of the nanofiltration membrane layer 163 .

In this embodiment, the support layer 161 is a tube made of steel wire, the porous carrier layer 162 covers the outside of the support layer 161, and the porous carrier layer 162 is made of woven fabric, non-woven fabric and microporous The nanofiltration membrane layer 163 is made of a polymer ultrafiltration membrane as a base membrane, and the base membrane is used to filter the graphene oxide solution, and the graphene oxide solution is continuously pushed under the static pressure of 0.05-0.5MPa to allow the solvent molecules to penetrate The ultrafiltration membrane makes a wet nanofiltration membrane, and the nanofiltration membrane is dried in a vacuum drying oven to form the nanofiltration membrane layer 163, which has a good filtering and purification effect, and the protective layer 164 is coated on the The outer wall of the nanofiltration membrane layer 163, and the protective layer 164 is reacted with the nanofiltration membrane layer 163 by using a PVA aqueous solution with a concentration of 12% to 14% and placed in a vacuum drying oven to dry. The protective layer 164 can protect the internal structure of the nanofiltration mesh layer 16 . And a bactericidal layer 165 can be arranged between the porous carrier layer 162 and the nanofiltration membrane layer 163, and the material used in the bactericidal layer 165 is nano-silver. Ten kinds of pathogenic microorganisms have strong inhibitory and killing effects. Therefore, the passing water can be sterilized to obtain sterile drinking water. The purification effect of the water purification membrane is better.

What has been disclosed above is only a preferred embodiment of the present invention, of course, it cannot limit the scope of rights of the present invention. Those of ordinary skill in the art can understand that all or part of the process of realizing the above-mentioned embodiment can be implemented according to the present invention. The equivalent changes made by the claims of the utility model still belong to the scope covered by the utility model.

Claims (7)

1. A low-pressure nanofiltration water purification film, which is characterized in that,

including barrel, lid, collector pipe, first filtration stratum reticulare, chitin stratum reticulare, second filtration stratum reticulare, receive filter stratum reticulare and outlet pipe, the lid with the connection can be dismantled to the barrel, the one end of collector pipe is run through the lid and is inserted to the inside of barrel, a plurality of holes of permeating water have on the lateral wall of collector pipe, first filtration stratum reticulare is arranged in the inside of collector pipe, the chitin stratum reticulare, second filtration stratum reticulare with receive filter stratum reticulare from interior to exterior cladding in proper order in the outside of collector pipe, just receive filter stratum reticulare with form the water storage chamber between the inner wall of barrel, the outlet pipe with the water storage chamber intercommunication is located the barrel is kept away from the one end of collector pipe.

2. The low pressure nanofiltration water purification membrane of claim 1,

the low-pressure nanofiltration water purification film further comprises a mounting ring, wherein a first ring body groove, a second ring body groove and a third ring body groove are formed in the mounting ring, the mounting ring is in threaded connection with the water collecting pipe through the first ring body groove, one side of the first filter net layer is fixedly connected with the mounting ring and is arranged in the third ring body groove.

3. The low pressure nanofiltration water purification membrane of claim 2,

the low-pressure nanofiltration water purification film further comprises a flow guide net layer, one side of the flow guide net layer is fixedly connected with the mounting ring and is arranged in the second ring body groove, and the flow guide net layer is arranged between the first filter net layer and the inner side wall of the water collecting pipe.

4. The low pressure nanofiltration water purification membrane of claim 1,

the low-pressure nanofiltration water purification film also comprises a water permeable net layer, and the water permeable net layer is arranged between the second filtration net layer and the nanofiltration net layer.

5. The low pressure nanofiltration water purification membrane of claim 4,

activated carbon particles are filled between the second filter net layer and the water permeable net layer, and between the nanofiltration net layer and the water permeable net layer.

6. The low pressure nanofiltration water purification membrane of claim 5,

the low-pressure nanofiltration water purification film further comprises a first connecting sheet and a second connecting sheet, two ends of the first connecting sheet are fixedly connected with the second filtration net layer and the water permeable net layer respectively and are positioned between the second filtration net layer and the water permeable net layer, and two ends of the second connecting sheet are fixedly connected with the nanofiltration net layer and the water permeable net layer respectively and are positioned between the nanofiltration net layer and the water permeable net layer.

7. The low pressure nanofiltration water membrane of any one of claims 1 to 6,

the nanofiltration net layer comprises a supporting layer, a porous carrier layer, a nanofiltration membrane layer and a protective layer, wherein the porous carrier layer is fixedly connected with the supporting layer and covers the outside of the supporting layer, the nanofiltration membrane layer is fixedly connected with the porous carrier layer and covers the outside of the porous carrier layer, and the protective layer is fixedly connected with the nanofiltration membrane layer and covers the outside of the nanofiltration membrane layer.

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