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Reverse osmosis membrane chemical cleaning method

A technology of chemical cleaning and reverse osmosis membrane, which is applied in the field of reverse osmosis system, can solve problems such as difficult cleaning measures, achieve the effects of restoring membrane flux and desalination rate, high cleaning efficiency, and saving economic costs

Inactive Publication Date: 2012-12-12
西安兴仪启动发电试运有限公司
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  • Abstract
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Problems solved by technology

However, for the fouling caused by biological bacteria and organic matter, the usual cleaning measures are still difficult to deal with

Method used

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  • Reverse osmosis membrane chemical cleaning method
  • Reverse osmosis membrane chemical cleaning method
  • Reverse osmosis membrane chemical cleaning method

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[0072]

[0073]

[0074] The invention provides a novel chemical cleaning method for reverse osmosis membranes, which adopts the method of combining pickling and chlorine washing to chemically clean the polluted reverse osmosis membranes. First, use citric acid to pickle the reverse osmosis membrane to remove inorganic salt scale and metal ions on the surface of the membrane, and then use chlorine washing technology to clean the reverse osmosis membrane at a deeper level. Chlorine washing can not only remove biological fouling well, but also It also has a good bactericidal effect. Chlorine washing is to use hydrogen peroxide solution to chemically clean the membrane under the condition of a certain residual chlorine concentration. The practice of cleaning reverse osmosis polluted membranes through the combination of multiple on-site pickling and chlorine washing has proved that this technology can be fully promoted and implemented, and It is especially effective for reve...

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Abstract

The invention discloses a reverse osmosis membrane chemical cleaning method which performs chemical cleaning on a polluted reverse osmosis membrane by a combination of acid cleaning and chlorine cleaning. The method comprises the following steps: carrying out acid cleaning on the reverse osmosis membrane by using citric acid to remove inorganic salt scales and metallic ions on the membrane surface; and carrying out chlorine cleaning technique to perform deeper cleaning on the reverse osmosis membrane, wherein the chlorine cleaning not only can remove biological sewage, but also can have favorable sterilizing effect. The chlorine cleaning process is implemented by carrying out chemical cleaning on the membrane by using an oxydol solution under the condition of certain residual chlorine concentration. Repeated field reverse osmosis polluted membrane cleaning by combining acid cleaning and chlorine cleaning proves that the technique can be popularized and implemented and has especially obvious effect on the reverse osmosis system with reduced membrane flux due to biological sewage.

Description

technical field [0001] The invention relates to a reverse osmosis system of a boiler feed water system in a power plant, in particular to a chemical cleaning method for a reverse osmosis membrane. Background technique [0002] At present, reverse osmosis (RO) devices are more and more widely used in industrial production. The core of the reverse osmosis device is the membrane module. During the operation, even if a more suitable membrane is selected and the normal system operation and maintenance are carried out, the water permeability of the membrane will decrease with the increase of the operation time, that is, the problem of membrane fouling will occur. . [0003] After the reverse osmosis membrane is put into use, it will be polluted by impurities in the water. Due to the different water sources used in production in various places, different raw water treatment methods, and different production methods, the reverse osmosis membrane will be polluted to varying degrees....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D65/06C02F1/44
Inventor 涂孝飞杨彦科
Owner 西安兴仪启动发电试运有限公司
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