Intermittent spiral cross-flow membrane filtering device and method thereof

Abstract

The invention discloses an intermittent spiral cross-flow membrane filtering device and a method thereof. The filtering device comprises a membrane component and a water circulation system, wherein the membrane component comprises a shell body, a hollow fiber external press film and a spiral baffle plate, the spiral baffle plate is arranged in the shell body, a reserved water storage zone is arranged above the spiral baffle plate, a spiral channel is formed between the spiral baffle plate and the shell body, the hollow fiber external press film goes through the spiral baffle, a cross-flow water inlet is arranged in the lower end of the shell body, a cross-flow water outlet is arranged in the upper end of the shell body, the cross-flow water inlet is corresponding to the inlet of the spiral channel, the outlet of the spiral channel is communicated to the cross-flow water outlet through the reserved water storage zone; the water circulation system comprises a water reservoir, a circulation water pump, and a pulse water flow generator, wherein the water reservoir, the circulation water pump and the pulse water flow generator are orderly connected through pipelines, the pulse water flow generator is communicated with the cross-flow water inlet pipeline, and the water inlet of the water reservoir is connected to the cross-flow water outlet pipeline. The device carries out cross-flow filtration and dead end filtration in turns. The device has the advantages of convenience, energy reduction, and easy automatic control, can effectively slow down the membrane pollution accumulation, and prolongs the service life of the membrane.

Description

Technical field [0001] The present invention relates to a membrane separation method, in particular to a membrane filtration method and device in membrane separation technology: cross-flow filtration and dead-end filtration are alternately performed, and during operation, pulsed water flows through a screw, causing material liquid to be generated The spiral flow and the pollutants on the membrane surface move in both tangential and longitudinal directions to complete the entry of the feed liquid and the cleaning of the membrane surface to restore the membrane flux. Background technique [0002] Membrane separation technology is a kind of separation, classification and enrichment of mixed liquids with the help of external energy or chemical potential to selectively permeate porous membranes as the separation medium. It has the advantages of no phase change, normal temperature or low temperature operation, and low energy consumption. However, the problem of membrane fouling in the...

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Problems solved by technology

[0010] The purpose of the present invention is to provide a method and device for overcoming the shortcomings of existing hollow fiber membrane filtration methods, which are easy to produce and difficult to deal with pollution, which has higher treatment effect and simpler cleaning operation

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