Double-layer flat membrane module

Abstract

A double-layer flat membrane module comprises upper layer supports, lower layer supports and a bottom layer aeration membrane box, the bottom end of the upper layer supports is provided with a water collection tube reserved outlet, one side of the top end of the upper layer supports is provided with a water collection tube, one side of the top end of the lower layer supports is provided with a water collection tube, the top end of the lower layer supports is provided with inclined guiding U-shaped racks along the edge of the periphery of the lower layer supports, the bottom end of the upper layer supports is inserted to the top end of the lower layer supports through guidance of the guiding U-shaped racks, the top end of the aeration membrane box is provided with inclined guiding U-shaped racks along the edge of the periphery of the aeration membrane box, the bottom end of the lower layer supports is inserted to the top end of the aeration membrane box through guidance of the guiding U-shaped racks, two sides of the upper end and the lower end of each of the upper layer supports and the lower layer supports are respectively provided with a lug, the lug is provided with a corresponding guiding hole, and a guiding post is inserted to the guiding hole. A double-layer membrane frame is adopted, so the effective membrane area per unit of area is multiplied, and the required quantity of aeration frames is halved. The specific aeration demand per unit of membrane area is decreased, so the running cost per water treatment capacity is reduced.

Description

technical field [0001] The invention relates to sewage treatment equipment, in particular to a double-layer flat membrane sewage treatment equipment. Background technique [0002] my country is a water-scarce country, and sewage treatment and reuse are effective measures to develop and utilize water resources. Sewage reuse is to use urban sewage and industrial sewage for non-drinking purposes such as greening, washing, and replenishing ornamental water bodies after being treated by membrane bioreactors and other equipment. Membrane bioreactor is a new type of sewage treatment system that organically combines membrane separation technology and biological treatment technology. Replace the terminal secondary sedimentation tank of traditional biological treatment technology with membrane modules, maintain high active sludge concentration in the bioreactor, and increase the organic load of biological treatment. [0003] The membrane in the membrane bioreactor (MBR) is placed in...

AI Technical Summary

Problems solved by technology

However, in the current MBR sewage treatment project, the membrane modules used are mostly hollow fiber membranes, which have the disadvantages of easy broken wires, poor anti-pollution ability, frequent cleaning, and cannot be cleaned online.

The reason is that compared with the hollow fiber membrane, the existing flat membrane module has a lower sewage treatment capacity per unit area, and the structure of a single device itself is complex, the installation and construction are difficult and the cycle is long, and it is not suitable for multiple sets of flat membrane equipment in the same membrane tank. Compact arrangement, large amount of supporting civil works and high cost, not suitable for large-scale municipal MBR sewage treatment projects

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