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

Abstract

The invention relates to single-pipe external-compression type mechanical-circulation forced-cross flow solid and liquid-separating dynamic membrane system and device. The dynamic membrane device comprises a tubular external-compression type supporter with a large-hole diameter net, a shell arranged at the outer side of the tubular external-compression type supporter, a plurality of supports, a raw water inlet and a plurality of purified water outlet tubes, wherein the inner part of the shell and the outer part of the tubular external-compression type supporter form a water inlet chamber, andthe supports are arranged between the tubular external-compression type supporter and the shell at intervals and are respectively sheathed with the tubular external-compression type supporter and thetubular external-compression type supporter; the raw water inlet is connected to the lower end of the shell and is communicated with the water inlet chamber; and the purified water outlet tubes penetrate through the shell and are communicated with the inner cavity of the tubular external-compression type supporter. The dynamic membrane device also comprises a cross-flow backflow water outlet which is connected to the upper end of the shell and is communicated with the water inlet chamber. The dynamic membrane device has the advantages of no waterpower blind angel, short precoating time, convenient back washing, continuous working, improved membrane flux, stable water yield and long working period.

Description

technical field [0001] The invention relates to water supply / sewage treatment technology, in particular to a single-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, ultrafil...

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a single-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 single-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 in the prior art due to structural defects. Technical problems of uneven film thickness and long film forming time

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