Folding type filter cartridge of polytetrafluoroethylene composite microfiltration membrane

Abstract

The invention relates to a folding type filter cartridge of a polytetrafluoroethylene composite microfiltration membrane, which comprises a filter dielectric layer, an internal support column and an external support column, wherein the filter dielectric layer comprises a layer of polytetrafluoroethylene composite membrane, a layer of plain weave, a layer of dacron non-woven cloth and a layer of polypropylene net-shaped structure; the plain weave is arranged on the upstream side of the polytetrafluoroethylene composite membrane; the dacron non-woven cloth is arranged on the downstream side of the polytetrafluoroethylene composite membrane; the polypropylene net-shaped structure is arranged on the downstream side of the dacron non-woven cloth; any two adjacent fins are connected in a welding mode; the upper ends of the internal support column and the external support column are welded with an upper end cover, and the lower ends are welded with a lower end cover; a positioning triangle fin is welded on the upper end cover, and an interface pipe fitting is welded on the lower side of the lower end cover; the polytetrafluoroethylene composite membrane is taken as a filter membrane; the plain weave on the upstream side and the polypropylene net-shaped structure on the downstream side of the polytetrafluoroethylene composite membrane have the action of support and protection; and the hydraulic resistance of the polytetrafluoroethylene composite membrane is less.

Description

Technical field: [0001] The invention relates to air purification technology, in particular to a device for removing bacteria and particles in the air, in particular to a polytetrafluoroethylene composite microporous filter membrane folded filter element. Background technique: [0002] A large number of various filter devices are used in the sterilization and filtration of air in pharmaceutical fermentation, bioengineering, food and beverage, modern chemical industry, electronics industry, environmental protection and other industries. The filter media in the early air filter devices mostly used cotton or glass fiber cotton or activated carbon, etc. These filter devices had the problems of poor filtration accuracy, low filtration efficiency, short service life, high initial resistance, and high energy consumption. In the prior art, pleated membrane filter elements are widely used in filtration devices, and the filter media used in the pleated membrane filter elements mainly ...

AI Technical Summary

Problems solved by technology

However, in the existing filter element structure, a layer of long-fiber non-woven fabric is used as a protective layer on both sides of the membrane, that is, the upstream and downstream sides of membrane filtration, which often causes the PTFE composite membrane to be damaged during the folding process, and the protection The layer increases the fluid resistance, which makes the initial resistance of the filter element large and the pressure high, and the specific performance is that the flow rate is small

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