Immersed hollow fiber membrane module

Abstract

The invention relates to a immersion hollow fiber film, which comprises unit frame, several curtain film units and integrated aeration tube. Wherein, the invention is characterized in that: single film unit comprises upper and lower ends, and filled hollow fiber film, without frame; the upper and lower ends of several films are parallel connected via water collecting tubes; the aeration tubes are parallel connected inside the frame; the single curtain film has transverse multilayer structure; the aeration tube is at the side of lower water collecting tube of each curtain film. The invention can be used in film biological reactor, to modularize the film element, with high stuff density. The invention can reduce energy consumption, etc.

Description

technical field [0001] The invention relates to an external pressure submerged hollow fiber membrane module, in particular to a submerged hollow fiber membrane module and a unit membrane module which can be used in a membrane bioreactor, and in particular to a membrane filament arrangement structure of a curtain membrane module. Background technique [0002] The crisis of fresh water resources is a worldwide problem. Although my country's total water resources ranks sixth in the world, the shortage of water resources is even more worrying. Experts predict that after 2010, my country will begin to enter a period of severe water shortage. Experts also pointed out that in 2030, my country's total water demand is expected to be 780 billion to 820 billion cubic meters, the total water supply will be 740 billion to 770 billion cubic meters, and the water shortage will be 40 billion to 50 billion cubic meters. The peak of water shortage will appear during this period, and water ha...

AI Technical Summary

Problems solved by technology

The membrane filaments of the existing membrane modules are arranged randomly. Although the general trend is relatively orderly along the direction of the water collection pipes, it is very easy for the membrane filaments to cross between the upper and lower water collection pipes, causing several membrane filaments or even Dozens of branches intersect with each other, resulting in the phenomenon of "bundling", and the occurrence of this phenomenon will eventually lead to dehydration (drying) of the sludge inside the membrane bundle.

[0015] (3) In order to increase the packing density of the membrane filaments and increase the membrane area, the curtain membrane module of the old submerged membrane bioreactor adopts a double-arc design, that is, the membrane filaments are planted along the two long sides of the water collection pipe, so that the two membrane filaments Phase separation, which has a certain inhibitory effect on the pollution at the root of the membrane filaments, but on the inner side of the two membrane filaments, due to the inability to obtain sufficient shaking of the gas and water, the membrane fouling is aggravated

[0016] The previous hollow fiber curtain membrane structure is shown in Figure 1. It is a two-piece structure. The two membranes are arranged side by side in the vertical direction. During use, sludge is easy to accumulate between the two membranes, causing the hollow fiber membrane bundles to stick together. Contact with liquids, thus losing the filtering effect

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