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On-line back washing process system of porous ceramic film

A porous ceramic membrane and process system technology, which is applied in the field of dead end or micro-cross-flow porous ceramic membrane online backwash process system, can solve the problems of high energy consumption and slow recovery of flux, etc., to avoid secondary pollution and reduce pressure Effect

Active Publication Date: 2012-09-26
河南方周瓷业有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the shortcomings of slow recovery flux and high energy consumption of the current ceramic membrane backwashing device, the present invention proposes a new type of porous ceramic membrane online backwashing device

Method used

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  • On-line back washing process system of porous ceramic film
  • On-line back washing process system of porous ceramic film
  • On-line back washing process system of porous ceramic film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] ZrO 2 Porous ceramic membrane instead of hollow fiber membrane for seawater desalination process, without backwash, ZrO 2 The initial membrane flux of the porous ceramic membrane is 1 ton / m 2 h, the membrane flux decays to 0.5 tons / m after half an hour 2 h, after 24 hours, the membrane flux decays to 0.4 tons / m 2 h, then the membrane flux was restored to 100% after acid-base cleaning.

[0021] ZrO 2 Porous ceramic membranes instead of hollow fiber membranes for seawater desalination process, ZrO 2 The initial membrane flux of the porous ceramic membrane is 1 ton / m 2 h, the membrane flux decays to 0.5 tons / m after half an hour 2 h, followed by backwashing, the membrane flux is restored to 100%, and then backwashing every half an hour, the permeation separation efficiency can be increased by more than 25%.

Embodiment 2

[0023] ZrO 2 Porous ceramic membrane used in mine water treatment process, without backwash, ZrO 2 The initial membrane flux of the porous ceramic membrane is 0.5 tons / m 2 h, the membrane flux decays to 0.3 tons / m after half an hour 2 h, after 24 hours, the membrane flux decays to 0.2 tons / m 2 h, then the membrane flux was restored to 100% after acid-base cleaning.

[0024] ZrO 2 Porous ceramic membranes instead of hollow fiber membranes for seawater desalination process, ZrO 2 The initial membrane flux of the porous ceramic membrane is 0.5 tons / m 2 h, the membrane flux decays to 0.3 tons / m after half an hour 2 h, followed by backwashing, the membrane flux is restored to 100%, and then backwashing every half an hour, the osmotic separation efficiency can be increased by about 30%.

Embodiment 3

[0026] ZrO 2 Porous ceramic membrane used in the extraction process of erythromycin fermentation broth, when there is no backwash, ZrO 2 The initial membrane flux of the porous ceramic membrane is 400L / m 2 h, the membrane flux decays to 100L / m after 10min 2 h, the membrane flux decays to 40L / m after 2h 2 h, then the membrane flux was restored to 100% after acid-base cleaning.

[0027] ZrO 2 Porous ceramic membrane used in the extraction process of erythromycin fermentation broth, ZrO 2 The initial membrane flux of the porous ceramic membrane is 400L / m 2 h, the membrane flux decays to 100L / m after 10min 2 h, followed by backwashing, the membrane flux is restored to 100%, and then backwashing every 10 minutes, the permeation separation efficiency can be increased by more than 50%.

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Abstract

The invention relates to an on-line back washing process system of a porous ceramic film. A cleaning liquid is extruded into a ceramic film assembly by adopting air pressure or a submersible pump, and a cleaning liquid discharge switch is arranged, and the pressure required by back washing can be lowered; a switch and a soundproofing device are installed above a cleaning tank, and the noise pollution caused by air in a cleaning liquid storage tank is solved; the opening and closing time and the pressure of an air pump are regulated through a time relay, thus the liquid in the cleaning liquid storage tank is always maintained to be 1 / 3 of the volume of the cleaning liquid storage tank; and through installing the cleaning liquid discharge switch at a material discharge end of a filtering device of the porous ceramic film, most of the cleaning liquid can be recycled, thus the cleaning liquid can be prevented from circulating and entering an original liquid storage tank, and the secondary pollution to the film is prevented. The system not only can improve the film flux recovery speed, the film flux recovery rate can reach 95% above, and water is saved and electricity is saved. The on-line back washing process system of the porous ceramic film provided by the invention is mainly applied to the back washing process of the application of the porous ceramic film in the liquid filtering process, can effectively recover the film flux, and is beneficial to popularization and application..

Description

technical field [0001] The invention relates to an online backwashing process system of a dead end or slightly cross-flow porous ceramic membrane, which belongs to the field of mechanical equipment. Background technique [0002] Due to the advantages of excellent high separation efficiency, high temperature resistance, solvent resistance, anti-microbial, acid and alkali resistance, high mechanical strength, easy cleaning and reproducibility, porous inorganic ceramic membranes have been used in the deep processing of food, beverages and plants (drugs). , biomedicine, fermentation, fine chemical industry and many other fields have been widely used. However, one of the main reasons hindering the large-scale application of porous ceramic membranes is that the membrane flux decreases sharply due to membrane pore clogging during use, which increases the cost of use. In order to solve this problem, on the one hand, it is necessary to modify the surface of the porous ceramic membra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D65/02
Inventor 孟震郑克明周晨王鑫爵汪长安刘瑞平黄勇衷待群
Owner 河南方周瓷业有限公司
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