Photocatalysis-nanofiltration ceramic membrane advanced water purification and treatment device and preparation method thereof

Abstract

The invention discloses a photocatalysis-nanofiltration ceramic membrane advanced water purification and treatment device and a preparation method thereof. The device comprises a shell, wherein a ceramic membrane filter element and a quartz tube are arranged inside the shell in sequence in a sleeving manner; an inner cavity of the shell is divided into an outer cavity and an inner cavity; the ceramic membrane filter element at least comprises an upper section, a middle section and a lower section; the outer cavity and the inner cavity are divided into at least four independent cavities comprising an outer lower cavity, an outer upper cavity, an inner lower cavity and an inner upper cavity between the upper section, the middle section, the lower section, the shell and the quartz tube by virtue of an outer partition and an inner partition. The preparation method comprises the following steps: arranging a nanometer photocatalyst layer on an inner wall of a three-section ceramic membrane by adopting differential pressure impregnation, and arranging a nanofiltration layer on an outer wall of the upper section of the ceramic membrane by adopting sol-gel and differential pressure impregnation-heat treatment processes. According to the device disclosed by the invention, advanced water purification functions of degrading organic toxic substances, sterilizing and disinfecting water and removing high valence salt ions simultaneously are realized.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a photocatalysis-nanofiltration ceramic membrane deep water purification treatment technology. Background technique [0002] Nanofiltration ceramic membrane is a pressure-driven membrane between reverse osmosis and ultrafiltration. It is made of inorganic ceramic materials through a special process. The tube wall of the tubular ceramic membrane is densely covered with micropores. Under pressure, the solution to be treated Flowing in the membrane tube or outside the membrane, small molecular substances (or liquid) permeate the membrane, and macromolecular substances (or solids) are intercepted by the membrane, so as to achieve the purposes of separation, purification and environmental protection. The molecular weight of organic matter intercepted by nanofiltration ceramic membrane is about 150-500, and the ability to intercept soluble salts is between 2-98%. Compared with ...

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Problems solved by technology

The molecular weight of organic matter intercepted by nanofiltration ceramic membrane is about 150-500, and the ability to intercept soluble salts is between 2-98%. Compared with organic nanofiltration membrane, it has good chemical stability, acid and alkali resistance, and organic solvent resistance. , bacteria resistance, high temperature resistance, anti-pollution, high mechanical strength, good regeneration performance, simple separation process, low energy consumption, easy operation and maintenance, long service life and many other advantages, but with the improvement of filtration accuracy, its processing difficulty and cost also increase followed by a sharp increase

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