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Method and device for cleaning membrane

A technology for cleaning devices and membranes, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve uneconomical problems, improve the effect, and solve the effect of biological clogging

Active Publication Date: 2010-06-09
IND TECH RES INST
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a film cleaning device and a film cleaning method, which can make the film return to the flux closer to the initial state after cleaning, and can effectively eliminate film scaling (Scalling) and biological Blocking (Bio-fouling), and can effectively eliminate (pore plugging) problems, so that the membrane can be used effectively to solve the uneconomical phenomenon of membrane elimination

Method used

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  • Method and device for cleaning membrane
  • Method and device for cleaning membrane
  • Method and device for cleaning membrane

Examples

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Embodiment Construction

[0045] Figure 2A and Figure 2B It is a schematic cross-sectional side view of a film cleaning device according to an embodiment of the present invention. Please refer to Figure 2A , The film cleaning device 200 of the present invention includes two electrode plates 212 , 214 and a filter unit 220 , wherein the filter unit 220 is disposed between these electrode plates 212 , 214 . also. The filter unit 220 includes a support plate 222 and a membrane 224 , and the membrane 224 is disposed on the support plate 222 and is used for filtering raw water to produce purified water.

[0046] In this embodiment, the membrane 224 can be a reverse osmosis (Reverese Osmosis, RO) membrane, but the present invention does not limit the type of the membrane 224, for example, the membrane 224 can also be a nanofiltration (Nanofiltration, NF) membrane, ultra Filtration (Ultrafiltration, UF) membrane, microfiltration (Microfiltration, MF) membrane or other suitable types of filtration membr...

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Abstract

The invention relates to a device for cleaning a membrane, comprising two electrode plates and a filter unit. The filter unit is configured between the two electrode plates and comprises a supporting plate and a membrane which is configured on the supporting plate. By generating electrical field in the membrane region and carrying out backwashing on the membrane, scale deposit on the membrane can be cleared efficiently. The invention enables the cleaned membrane to restore to flux that is closer to the initial state, effectively eliminates incrustation on the membrane and biologic block to discharge the incrustation efficiently so that the membrane can be used efficiently to solve the problem of the uneconomical phenomenon that the membrane is obsolete.

Description

technical field [0001] The invention relates to a film cleaning method and device, in particular to a film cleaning method and device for electric cleaning. Background technique [0002] The application of thin film water purification treatment is becoming more and more extensive, which is the key core technology in the future, and the global film market for water treatment application is expected to exceed 43 billion yuan in 2010. However, membrane fouling is still a technical bottleneck that cannot be overcome at present, resulting in an uneconomical situation with an annual membrane elimination rate of about 20%, which makes the problem of membrane fouling limit the market and reduce the application value. [0003] Membrane fouling causes the flux (Flux) to decay or the trans-membrane pressure (Trans-Membrane Pressure, TMP) to increase. At this time, the membrane must be cleaned to restore the treatment performance. However, the flux of the membrane will decrease with th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D65/02
Inventor 陈建宏朱振华张王冠周珊珊
Owner IND TECH RES INST
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