Pollution resistant membrane module and use method thereof

Abstract

The invention provides a pollution resistant membrane module which is a flat membrane module. The membrane module comprises a frame and two filter membranes, wherein the two filter membranes respectively cover the two sides of the frame; a liquid flow channel is formed between the two filter membranes; a water outlet is arranged at one end of the frame; at least a conducting coil pipe vertical to the filter membranes is arranged between the two filter membranes; magnetic chips are arranged in the positions corresponding to the coil bodies on the filter membranes; and the orientations of the south and north poles of the two magnetic chips in the same positions on the two filter membranes are identical. The pollution resistant membrane module has the following beneficial effects: when being electrified, the conducting coils in the pollution resistant membrane module generate south and north poles and generate attractive forces or repulsive forces towards the filter membranes or supporting filter plates which are provided with the magnetic chips with south and north poles; the directions of the south and north poles of the conducting coils are changed by changing the current directions, so that the filter membranes can be continuously shaken to shake off the pollutants, thus alleviating membrane pollution and prolonging the service lives of the membranes; and less electricity is used, so the aeration energy consumption can be reduced and the operation cost can be lowered.

Description

technical field [0001] The invention relates to membrane filtration technology, in particular to an anti-fouling membrane module and its application method. Background technique [0002] At present, membrane separation technology has been widely used in various filtration systems in water treatment, food industry, chemical industry and other fields. However, the membrane fouling caused by the accumulation and compression of filter substances inside and on the surface of the membrane will affect the stable operation of the process, increase the frequency of membrane replacement, and hinder the wider application of membrane filtration systems. Effective membrane fouling prevention and control technology can increase membrane flux, reduce energy consumption, enhance system stability, prolong membrane life, and reduce operating costs. [0003] In the application of membrane technology, flat membrane is one of the most widely used membranes. At present, the main means of slowing...

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Problems solved by technology

[0004] However, it is not that the greater the aeration intensity, the better. Excessive aeration intensity will destroy the sludge flocs, reduce their particle size, and may destroy the interconnection between microorganisms, inorganic particles and extracellular polymers in the flocs. The disintegration of micelles releases extracellular polymers, increases the concentration of dissolved organic matter in the supernatant, and aggravates membrane fouling; and enhanced aeration will significantly increase the energy consumption of the flat-panel membrane filtration system and increase operating costs. For example, the treatment scale is 240m 3 In the sewage reuse system of / d, the power cost accounts for 21% of the operating cost; in order to delay membrane fouling, the gas-water ratio of the membrane bioreactor process is usually about 40:1, and the energy consumption of aeration accounts for more than 96% of the power cost , so it is necessary to control the aeration rate to the greatest extent while ensuring the treatment effect and slowing down the membrane fouling

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