Immersed type on-line cleaning method and device for slab ceramic membrane

A cleaning device and ceramic membrane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of poor cleaning effect, long cleaning time, time-consuming and laborious, etc., and achieve simple structure and floor space. Less, improve the effect of cleaning effect

Inactive Publication Date: 2014-04-30
ZHEJIANG ZONE KING ENVIRONMENTAL SCI&TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] Based on the existing patents, literature research and market products, it can be found that the existing cleaning methods are mainly for tubular porous ceramic membranes, and there are few reports on the cleaning methods for submerged flat ceramic membranes; the cleaning methods are mainly offline cleaning, The ceramic membrane needs to

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  • Immersed type on-line cleaning method and device for slab ceramic membrane
  • Immersed type on-line cleaning method and device for slab ceramic membrane

Examples

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Example Embodiment

[0051] Example one:

[0052] A sewage treatment plant uses the submerged flat ceramic membrane MBR process (membrane bioreactor) for wastewater treatment, and the online cleaning process for membrane cleaning. The system includes an automatic control system, a liquid reverse flushing system and a gas-liquid combined backwashing system; The automatic control system monitors the ceramic membrane transmembrane pressure in real time through a pressure transmitter. When the transmembrane pressure difference is greater than 0.04MPa, the automatic control system closes the water outlet valve of the flat ceramic membrane module, opens the liquid reverse flush valve F4, and starts the backwash pump 5-2 and cleaning agent metering pump 5-3, backflushing pressure 0.3MPa, flushing time 2min; then turn on Roots blower and gas opposite flushing valve F2, gas opposite flushing pressure 0.4MPa, gas-liquid combined backwashing time 2min, automatic Close the liquid reverse flush valve and the gas ...

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Abstract

The invention relates to an immersed type on-line cleaning method and device for a slab ceramic membrane. The invention aims to provide the method which can be used for cleaning the slab ceramic membrane in an in-situ or online manner without separating the ceramic membrane and a reactor, and the method has the characteristics of high membrane flux recovery speed, low energy consumption, high cleaning efficiency, low operation cost and automatic control. The provided device has the characteristics of simple structure and convenience in use. According to the technical scheme, the immersed type on-line cleaning process for the slab ceramic membrane comprises the following steps in sequence: (1) turning on on-line cleaning; (2) back-flushing a liquid phase; (3) back-flushing gas and liquid in a combined manner; and (4) finishing the on-line cleaning. The immersed type online cleaning device for the slab ceramic membrane comprises an aeration pipeline and a control system, wherein the on-line cleaning device further comprises a liquid-phase back-flushing system; the liquid-phase back-flushing system is assorted with a back-flushing pump and is communicated with the aeration pipeline through a pipeline; a cleaning agent preparation device is communicated with the liquid-phase back-flushing system through a pipeline.

Description

technical field [0001] The invention relates to the field of water treatment in environmental protection engineering, in particular to an online cleaning method and device for a submerged flat ceramic membrane. Background technique [0002] Ceramic membrane, also known as inorganic ceramic membrane or CT membrane, is a kind of solid membrane with high separation efficiency, stable effect, good chemical stability, acid and alkali resistance, organic solvent resistance, bacteria resistance, high temperature resistance, pollution resistance and mechanical strength. High efficiency, good membrane regeneration performance, simple separation process, low energy consumption, easy operation and maintenance, long membrane service life and many other advantages. [0003] However, there are obstacles to the large-scale promotion and application of ceramic membranes at present, mainly because the membrane flux decreases sharply due to the clogging of membrane pores during use, which inc...

Claims

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Application Information

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IPC IPC(8): B01D65/02B01D65/06
Inventor 王宇峰田平刘磊卓未龙
Owner ZHEJIANG ZONE KING ENVIRONMENTAL SCI&TECH CO LTD
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