Dual-water-outlet dual-component double-layer-membrane structural membrane assembly

Abstract

The invention discloses a dual-water-outlet dual-component double-layer-membrane structural membrane assembly. The assembly includes an aeration membrane box arranged at a bottom layer, a lower layercomponent arranged on the aeration membrane box, and an upper layer component arranged on the lower layer component; an air separation layer is arranged between the upper and lower layer components; the air separation layer is composed of upper and lower interval partition plates, and the upper and lower interval partition plates are correspondingly provided with air separation holes; the lower layer component is composed of a No.1 support and a No.2 support; the upper layer component is composed of a No.3 support and a No.4 support; the same sides of the top ends of the No.1 support and the No.2 support are separately provided with a lower component water-collecting pipe joint; the sides of the top ends of the No.3 support and the No.4 support corresponding to the top ends of the No.1 support and the No.2 support are separately provided with an upper component water collecting pipe joint; the upper and lower component water collecting pipe joints are connected with a water collectingpipe; vertically-upward water inlet mouths matching a flat sheet membrane component are uniformly distributed in the water collecting pipe; and the top end of the upper layer component is provided with air permeable holes.

Description

technical field [0001] The invention relates to a membrane filtration device, in particular to a flat membrane filtration module. 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. The membrane in the membrane bioreactor (MBR) is put into the bioreactor in the form of...

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 devices to be installed 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

[0004] Chinese Patent Publication No. CN 205235773 U discloses a double-layer flat membrane module. Its technical solution greatly improves the filtration efficiency by improving the single-layer membrane module and occupies a small area, but it can only be erected to the double-layer membrane module. The reason is that the higher the height, the lower the aeration efficiency of the aeration device at the bottom, which cannot meet the requirements of multiple layers, so its height can only stagnate at the double layer, which needs to be improved

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