Multi-pipe external-compression type mechanical circulation forced cross flow solid-liquid separation dynamic membrane system and device

Abstract

The invention relates to multi-pipe external-compression type mechanical circulation forced cross flow solid-liquid separation dynamic membrane system and device. The dynamic membrane device comprises a plurality of large-aperture net tubular external-compression type supporting bodies, a water purification cavity, an upper cover and a shell, wherein the inner cavity of the water purification cavity forms a water purification chamber, a plurality of through holes and a plurality of purified water outlets are arranged on the water purification cavity, and a plurality of supporting body connecting holes are arranged on a lower end plate of the water purification cavity; all the tubular external-compression type supporting bodies are communicated with the water purification cavity through the supporting body connecting holes; the upper cover is connected to the upper part of the water purification cavity and forms a cross flow backflow chamber together with the water purification cavity, and a cross flow backflow water outlet is arranged on the upper cover; the shell is connected to the lower part of the water purification cavity and forms a water inlet chamber together with the water purification cavity; and a raw water inlet is arranged on the shell. The multi-pipe external-compression type mechanical circulation forced cross flow solid-liquid separation dynamic membrane device has the advantages of no hydraulic dead angle, short precoating time, convenient backwashing, capability of continuously working, membrane flux increase of the dynamic membrane, stable water yield and long work cycle.

Description

technical field [0001] The invention relates to water supply / sewage treatment technology, in particular to a multi-tube external pressure mechanical circulation forced cross-flow solid-liquid separation dynamic membrane system and device. Background technique [0002] In the 21st century, water treatment membrane separation technology has become more and more widely used. Dynamic membrane separation technology, due to its relatively low investment cost, easy control of membrane fouling, and low energy consumption, has become a hot spot in current membrane research. [0003] Dynamic membrane (Dynamic membrane) can also be called secondary membrane (second membrane), which refers to a new membrane formed on the surface of microfiltration membrane, ultrafiltration membrane or large-pore support by precoating agent or activated sludge. The formation of a dynamic membrane can slow down the clogging (Block) and membrane fouling (Fouling) of the microfiltration membrane, ultrafilt...

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Problems solved by technology

[0011] The purpose of the present invention is to provide a multi-tube external pressure mechanical circulation forced cross-flow solid-liquid separation dynamic membrane system to solve the problem of hydraulic dead angle and membrane thickness caused by large-aperture dynamic membrane support components in the prior art due to structural defects. Technical problems of unevenness and long film forming time

[0012] Another object of the present invention is to provide a multi-tube external pressure mechanical circulation forced cross-flow solid-liquid separation dynamic membrane device to solve the problem of hydraulic dead angle and formation of large-aperture dynamic membrane support components due to structural defects in the prior art. Technical problems of uneven film thickness and long film forming time

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