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CN-224207774-U - Perfluoro filter core suitable for high pH working condition

CN224207774UCN 224207774 UCN224207774 UCN 224207774UCN-224207774-U

Abstract

The utility model provides a perfluorinated filter element suitable for a high pH working condition, which belongs to the technical field of liquid filter elements, and comprises an outer framework, an inner framework, a supporting layer, a filter membrane and a diversion layer, wherein the inner framework is fixedly connected in the outer framework, a cavity for installing a filtering structure is formed between the outer framework and the inner framework, the filtering structure comprises the supporting layer, the filter membrane and the diversion layer, the supporting layer, the filter membrane and the diversion layer are fixedly connected in the cavity, the supporting layer, the filter membrane and the diversion layer are sequentially arranged from the circumferential surface of the inner framework to the circumferential inner wall of the outer framework, through the multistage filtration of the filtering structure, the filtering precision is ensured, the filter element is normally used in the high pH environment by using materials of the device, the fluid flux is kept uniform, the system pressure is prevented from being increased by low flux operation, and the service life of the filter element is prolonged.

Inventors

  • WEI HAIBO
  • LIAO TIANPENG

Assignees

  • 上海策得过滤技术有限公司

Dates

Publication Date
20260508
Application Date
20250603

Claims (7)

  1. 1. A perfluorinated filter element suitable for use under high pH conditions, comprising: an outer skeleton (1); the inner framework (2) is fixedly connected in the outer framework (1), and a cavity for installing the filtering structure is formed between the outer framework (1) and the inner framework (2); The filter structure comprises a supporting layer (3), a filter membrane (4) and a flow guide layer (5), wherein the supporting layer (3), the filter membrane (4) and the flow guide layer (5) are fixedly connected in a cavity, and the supporting layer (3), the filter membrane (4) and the flow guide layer (5) are sequentially arranged from the circumferential surface of the inner framework (2) to the circumferential inner wall of the outer framework (1).
  2. 2. The perfluorinated filter element suitable for high pH working conditions according to claim 1, wherein the supporting layer (3) and the diversion layer (5) are both high-purity PFA woven meshes, and the filter membrane (4) is a high-purity high-precision PTFE filter membrane.
  3. 3. A perfluoro filter core suitable for high pH conditions as claimed in claim 2, characterized in that the outer skeleton (1) and the inner skeleton (2) are both high-purity PFA extrusion materials.
  4. 4. A perfluorinated filter element suitable for high pH conditions as claimed in claim 3, wherein the support layer (3), the filter membrane (4) and the guide layer (5) are all of uniform corrugated structures.
  5. 5. The perfluorinated filter element suitable for high pH conditions as set forth in claim 4, wherein the inner skeleton (2) has a plurality of first pores (6) formed on its circumferential surface, and the outer skeleton (1) has a plurality of second pores (7) formed on its circumferential surface.
  6. 6. The perfluorinated filter element suitable for high pH working conditions as set forth in claim 5, wherein a plurality of flow guiding pipes (9) are fixedly connected to the circumferential surface of the inner framework (2), the flow guiding pipes (9) are respectively connected with a plurality of first holes (6), and flow guiding inclined planes (8) are respectively arranged on the circumferential inner walls of the second holes (7).
  7. 7. A perfluorinated filter element according to claim 6, characterized in that the pore diameters of said first pores (6) decrease from top to bottom.

Description

Perfluoro filter core suitable for high pH working condition Technical Field The utility model belongs to the technical field of liquid filter elements, and particularly relates to a perfluorinated filter element suitable for a high pH working condition. Background A perfluoro cartridge is a filter element made of perfluoro material such as Polytetrafluoroethylene (PTFE) and perfluoroalkoxy resin (PFA) and is widely used in various fields with its excellent properties. The high-temperature-resistant metal alloy has extremely strong chemical stability, can resist corrosion of strong acid, strong alkali and organic chemical reagents, has excellent high-temperature resistance, and can be kept stable in a high-temperature environment. The perfluorinated filter element has high filtering precision and large flux, and is suitable for precise filtration and fluid treatment under severe conditions. The unique material characteristics of the material make the material play an important role in the industries of chemical industry, pharmacy, food processing and the like, and the purity of the fluid and the stable operation of the system are effectively ensured. The PFA plastic of the PFA folding filter element is a copolymer of a small amount of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene. High filtering precision, stable chemical performance, acid and alkali resistance, corrosion resistance, high temperature resistance and oxidation resistance. PFA is easier to process than PTFE, and can melt flow above the melting point, in addition to substantially retaining the various properties of polytetrafluoroethylene (teflon). In the prior art, the flux of the filter element under the working condition of high pH value can be reduced, the filtering efficiency is affected, the water production speed is reduced, the water demand cannot be met, the system pressure can be increased after long-time low-flux operation, the pollution and loss of the filter element are aggravated, the service life of the filter element is shortened, and the operation cost is increased. Disclosure of utility model The utility model aims to provide a perfluorinated filter element suitable for a high pH working condition, and aims to solve the problems that flux of the filter element in the high pH working condition in the prior art is reduced, filtering efficiency is affected, water production speed is reduced and water demand cannot be met, system pressure is increased, pollution and loss of the filter element are aggravated, service life of the filter element is shortened and running cost is increased due to long-time low-flux running. In order to achieve the above purpose, the present utility model provides the following technical solutions: A perfluorinated filter element suitable for use in high pH conditions, comprising: An outer skeleton; the inner framework is fixedly connected in the outer framework, and a cavity for installing the filtering structure is formed between the outer framework and the inner framework; The filter structure comprises a supporting layer, a filter membrane and a diversion layer, wherein the supporting layer, the filter membrane and the diversion layer are fixedly connected in the cavity, and the supporting layer, the filter membrane and the diversion layer are sequentially arranged from the circumferential surface of the inner framework to the circumferential inner wall of the outer framework. As a preferable scheme of the utility model, the supporting layer and the diversion layer are both high-purity PFA woven meshes, and the filter membrane is a high-purity high-precision PTFE filter membrane. As a preferred scheme of the utility model, the outer framework and the inner framework are both high-purity PFA extrusion molding materials. As a preferable scheme of the utility model, the supporting layer, the filter membrane and the diversion layer are all of uniform fold-shaped structures. As a preferable mode of the utility model, the circumferential surface of the inner skeleton is provided with a plurality of first pores, and the circumferential surface of the outer skeleton is provided with a plurality of second pores. As a preferable scheme of the utility model, the circumferential surface of the inner framework is fixedly connected with a plurality of flow guide pipes, the flow guide pipes are respectively connected with a plurality of first holes, and the circumferential inner walls of the second holes are respectively provided with a flow guide inclined plane. As a preferable mode of the present utility model, the pore diameters of the plurality of first pores are sequentially reduced from top to bottom. Compared with the prior art, the utility model has the beneficial effects that: 1. In this scheme, through using this device, the multistage filtration of fluid through filtration, guarantee filtration precision, the material that the device used makes the filter core normally use under high