An intermittent spiral cross-flow membrane filtration device and method
A cross-flow membrane and spiral technology, which is applied in the field of membrane separation methods, can solve the problems of difficult-to-handle pollution, etc., and achieve the effect of improving the cross-flow water flow path, not easy to membrane fouling, and good effect
Active Publication Date: 2015-08-26
SOUTH CHINA UNIV OF TECH
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[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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[0029] The present invention will be described in further detail below in conjunction with specific examples, but the embodiments of the present invention are not limited thereto, and the process parameters not specifically indicated can be carried out with reference to conventional techniques.
[0030] An intermittent spiral cross-flow membrane filtration device, including a membrane module 2 and a water circulation system, the membrane module 2 includes an upright casing 18, a hollow fiber outer pressure membrane 19 and a spiral baffle 20, and the inner wall of the casing is arranged close to the There is a spiral baffle 20, and the gap between the spiral baffle and the inner wall of the shell is 2 mm; a reserved water storage area 21 is provided on the spiral baffle, and a support pipe 22 is provided in the middle of the spiral baffle 20, and the spiral baffle 20 and A spiral channel around the support pipe 22 is formed between the casings 18; the hollow fiber outer pressure...
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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 invention relates to a membrane separation method, in particular to a membrane filtration method and its device in the membrane separation technology: cross-flow filtration and dead-end filtration are carried out alternately, and pulsed water flows through the screw during operation, causing feed liquid to generate The spiral flow and the pollutants on the membrane surface move in two directions, tangential and longitudinal, to complete the entry of the feed liquid and the cleaning of the membrane surface, and restore the membrane flux. Background technique [0002] Membrane separation technology is a kind of separation, fractionation and enrichment of mixed liquid with the help of external energy or chemical potential, using selectively permeable porous membrane as the separation medium. It has the advantages of no phase change, normal temperature or low temperature operation, and low energy consumption. However, the membrane fouling problem asso...
Claims
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IPC IPC(8): B01D65/02B01D65/08C02F1/44
Inventor 牛晓君闫新秀王彩虹
Owner SOUTH CHINA UNIV OF TECH