Alkaline cleaning solution, acidic cleaning solution and ultrafiltration membrane cleaning method

An acidic cleaning solution and cleaning solution technology, applied in the field of alkaline cleaning solution, can solve the problems of affecting the performance of the membrane, affecting the service life of the ultrafiltration membrane, and increasing the aging speed of the membrane body, so as to achieve improved water flux, mild performance, The effect of reducing operating pressure

Active Publication Date: 2019-12-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of these chemical cleaning agents generally requires the temperature to be controlled below 50°C, because conventional chemical cleaning under high temperature and high pressure will seriously corrode the structure of the membrane and affect the performance of the membrane, resulting in a significant increase in the aging rate of the membrane itself, which seriously affects the ultrafiltration membrane. service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The industrial waste water (temperature 70-80°C) produced by a company to prepare bromobutyl rubber is used as the raw water of this embodiment, and the filtered ultrafiltration membrane is used as the investigation target of the embodiment. The cleaning method of the ultrafiltration membrane in this embodiment include:

[0055] Step (1) Prepare alkaline cleaning solution and acid cleaning solution, place alkaline cleaning solution and acid cleaning solution in different storage tanks,

[0056] Alkaline cleaning solution includes sodium dodecylbenzene sulfonate, sodium dodecyl sulfate, dodecyl dimethyl benzyl ammonium bromide, dodecyl benzyl ammonium chloride and product water, wherein, according to In terms of mass, the content of sodium dodecylbenzenesulfonate is 0.05%, the content of sodium dodecyl sulfate is 0.1%, the content of dodecyl dimethyl benzyl ammonium bromide is 0.01%, and the content of dodecyl benzyl ammonium bromide is 0.01%. The ammonium chloride cont...

Embodiment 2

[0074] The ultrafiltration membrane that adopts same raw water and filter pollution as the investigation object of embodiment in embodiment 1, the cleaning method of ultrafiltration membrane in the present embodiment comprises:

[0075] Step (1) Prepare alkaline cleaning solution and acid cleaning solution, place alkaline cleaning solution and acid cleaning solution in different storage tanks,

[0076] Alkaline cleaning solution includes sodium dodecylbenzene sulfonate, sodium dodecyl sulfate, dodecyl dimethyl benzyl ammonium bromide, dodecyl benzyl ammonium chloride and product water, wherein, according to In terms of mass, the content of sodium dodecylbenzenesulfonate is 0.1%, the content of sodium dodecyl sulfate is 0.05%, the content of dodecyl dimethyl benzyl ammonium bromide is 0.03%, and the content of dodecyl benzyl ammonium bromide is 0.03%. The ammonium chloride content is 0.03%. Add trisodium phosphate and / or sodium hydroxide to adjust the pH to around 10.5.

[00...

Embodiment 3

[0094] The ultrafiltration membrane that adopts same raw water and filter pollution as the investigation object of embodiment in embodiment 1, the cleaning method of ultrafiltration membrane in the present embodiment comprises:

[0095] Step (1) Prepare alkaline cleaning solution and acid cleaning solution, place alkaline cleaning solution and acid cleaning solution in different storage tanks,

[0096]Alkaline cleaning solution includes sodium dodecylbenzene sulfonate, sodium dodecyl sulfate, dodecyl dimethyl benzyl ammonium bromide, dodecyl benzyl ammonium chloride and product water, wherein, according to In terms of mass, the content of sodium dodecylbenzenesulfonate is 0.1%, the content of sodium lauryl sulfate is 0.05%, the content of dodecyldimethylbenzyl ammonium bromide is 0.03%, and the content of dodecyl dimethyl benzyl ammonium bromide is 0.03%. The content of benzyl ammonium chloride was 0.03%. Add trisodium phosphate and sodium hydroxide to adjust the pH to around...

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Abstract

The invention provides an alkaline cleaning solution, an acidic cleaning solution and an ultrafiltration membrane cleaning method; wherein the alkaline cleaning solution comprises a surfactant, a non-oxidation bactericide and water, and the acidic cleaning solution comprises activated carbon, a metal ion complexing agent and water; the ultrafiltration membrane cleaning method comprises: alkali washing, acid washing and gas scrubbing. The alkaline cleaning solution and the acidic cleaning solution provided by the invention are mild in performance under a high-temperature condition, the physicalstructure and the performance of the membrane are not influenced, various pollutants remained on the surface of the ultrafiltration membrane and in membrane pores can be efficiently removed by the cleaning method, and the water production flux of the ultrafiltration membrane is improved.

Description

technical field [0001] The invention belongs to the technical field of ultrafiltration membrane cleaning, and relates to an alkaline cleaning solution, an acidic cleaning solution and an ultrafiltration membrane cleaning method. Background technique [0002] The past 30 years have been the golden age for the rapid development of ultrafiltration membrane technology. Ultrafiltration membrane separation technology has been widely used in drinking water preparation, food engineering, pharmaceutical industry, and industrial wastewater due to its main advantages such as high efficiency, low energy consumption, and no phase change. Treatment, metal processing coatings, biological product processing, petroleum processing and domestic sewage treatment and other fields. Especially in the field of industrial wastewater treatment, ultrafiltration membrane technology is one of the indispensable important components. However, the cost and service life of ultrafiltration membranes are lim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D65/06B01D61/14
CPCB01D61/145B01D65/02B01D65/022B01D2321/164B01D2321/162B01D2321/168
Inventor 任鹏飞栾金义杨永强张新妙奚振宇彭海珠
Owner CHINA PETROLEUM & CHEM CORP
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