Gas drive membrane separation method and membrane separation device

A membrane separation and gas drive technology, which is applied in the field of fluid treatment and fluid separation, can solve the problems of continuous long-term operation of the membrane separation process, low cleaning efficiency, shortened service life, etc., to achieve continuous and stable operation, Effect of reducing membrane fouling and increasing service life

Inactive Publication Date: 2009-09-09
上海立源生态工程有限公司
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  • Abstract
  • Description
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Problems solved by technology

The physical cleaning method needs a lot of backwash water, and the cleaning efficiency is not very high; while the chemical cleaning is more thorough, but the choice of the agent is difficult, and the chemical agent has a...

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  • Gas drive membrane separation method and membrane separation device
  • Gas drive membrane separation method and membrane separation device
  • Gas drive membrane separation method and membrane separation device

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Embodiment

[0032] See figure 1 As shown, the main body of the membrane separation device 100 in the embodiment of the present invention is a hollow fiber membrane module 10, a hollow fiber membrane 11 is arranged in the hollow fiber membrane module 10, and a bubble generator is arranged at the bottom of the hollow fiber membrane module 10 3. The compressed air inlet 2 is connected to the bubble generator 3, and another bubble control device (not shown) is connected to the bubble generator 3 to control the bubble generator 3. The top of the hollow fiber membrane module 10 is also provided with a gas-water separator 6 connected to the gas-water separator is an exhaust port 7 .

[0033] The above-mentioned membrane separation device 100 is operated in this way. When the sewage enters the pipeline from the sewage inlet 1, it first enters the hollow fiber membrane module 10 from the bottom of the hollow fiber membrane module 10, and at the same time, the compressed air enters the bubble gene...

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Abstract

The invention provides a gas drive membrane separation method. When a membrane works, continuous bubbles are introduced into one side or two sides of the membrane so that the membrane is vibrated within a definite frequency spectrum range. The invention also provides a membrane separation device. When the method and the device are applied, the prior process flow and the prior operating devices are not needed to be improved greatly, and a membrane device can be subjected to dirt removing operation during the running of the membrane only by increasing a bubble generating and controlling device so as to reduce membrane pollution, reduce plugging ratio, increase membrane flux, keep long-time continuous and stable operation during membrane separation, prolong the service life of the membrane, and improve the water yield of the membrane.

Description

technical field [0001] The invention relates to the fields of fluid treatment and fluid separation, in particular to a novel gas-driven membrane separation method and a membrane separation device using the gas-driven membrane separation method. Background technique [0002] Membrane separation technology uses a semipermeable membrane as a selective barrier layer, and there is a certain amount of energy difference on both sides of the membrane as a driving force, allowing some components to pass through while retaining other components in the mixture, and the migration of each component through the membrane Different rates, so as to achieve the purpose of separation technology. [0003] Membrane is a material with selective separation function. The process of using membrane selective separation to realize the separation, purification and concentration of different components of feed liquid is called membrane separation. It differs from traditional filtration in that membran...

Claims

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Application Information

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IPC IPC(8): B01D65/02B01D65/08B01D63/00
Inventor 徐立群陈井义
Owner 上海立源生态工程有限公司
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