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A kind of reverse osmosis membrane cleaning agent and using method thereof

A reverse osmosis membrane and cleaning agent technology, which is applied in the field of cleaning agents and reverse osmosis membrane cleaning agents, can solve problems such as difficult cleaning, water production discount, desalination layer shedding, etc., to achieve simple and convenient manual operation, reduce descaling costs, reduce Effect of operating differential pressure

Active Publication Date: 2019-03-29
西安合瑞环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional pickling and alkaline cleaning have little effect on barium sulfate or strontium sulfate scaling; in addition, barium and strontium scaling on the reverse osmosis membrane will be extremely difficult to remove for more than 7 days, and the pressure difference of the reverse osmosis membrane will remain high, and the water yield Great discount, high pressure differential operation of reverse osmosis membrane can easily lead to grid rush out, and even desalination layer falls off, greatly shortening the service life of reverse osmosis membrane
Currently, there is no effective cleaning agent for barium strontium scaling
In addition, the reverse osmosis membrane will also be accompanied by the presence of organic fouling during the scaling of barium and strontium, which makes the composition of the fouling more complicated, and the cleaning effect of conventional cleaning agents is very small

Method used

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  • A kind of reverse osmosis membrane cleaning agent and using method thereof
  • A kind of reverse osmosis membrane cleaning agent and using method thereof

Examples

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Effect test

Embodiment 1

[0018] A reverse osmosis membrane cleaning agent, comprising an alkaline reverse osmosis membrane cleaning agent and an acidic reverse osmosis membrane cleaning agent, and the alkaline reverse osmosis membrane cleaning agent and the acidic reverse osmosis membrane cleaning agent are kept independently; the alkaline reverse osmosis membrane The cleaning agent is composed of the following raw materials in the following mass percentages: 0.8% metal chelating agent, 0.1% alkaline pH regulator, 0.1% nonionic surfactant, 99% solvent; the acidic reverse osmosis membrane cleaning agent It is composed of the following raw materials in the following mass percentages: 0.1% citric acid, 0.1% acidic pH regulator, and 99.8% solvent.

[0019] The metal chelating agent is composed of tetrasodium edetate and pentasodium diethylenetriaminepentaacetate with a mass ratio of 1:1; the alkaline pH regulator is sodium hydroxide; the non- The ionic surfactant is octylphenol polyoxyethylene ether; the ...

Embodiment 2

[0033] A reverse osmosis membrane cleaning agent, comprising an alkaline reverse osmosis membrane cleaning agent and an acidic reverse osmosis membrane cleaning agent, and the alkaline reverse osmosis membrane cleaning agent and the acidic reverse osmosis membrane cleaning agent are kept independently; the alkaline reverse osmosis membrane The cleaning agent is composed of the following raw materials in the following mass percentages: 2.5% metal chelating agent, 0.15% alkaline pH regulator, 0.2% nonionic surfactant, 97.15% solvent; the acidic reverse osmosis membrane cleaning agent It is composed of the following raw materials in the following mass percentages: 0.15% citric acid, 0.15% acidic pH regulator, and 99.7% solvent.

[0034] The metal chelating agent is composed of tetrasodium edetate and pentasodium diethylenetriaminepentaacetate with a mass ratio of 1:1; the alkaline pH regulator is sodium hydroxide; the non- The ionic surfactant is octylphenol polyoxyethylene ether...

Embodiment 3

[0038] A reverse osmosis membrane cleaning agent, comprising an alkaline reverse osmosis membrane cleaning agent and an acidic reverse osmosis membrane cleaning agent, and the alkaline reverse osmosis membrane cleaning agent and the acidic reverse osmosis membrane cleaning agent are kept independently; the alkaline reverse osmosis membrane The cleaning agent is composed of the following raw materials in the following mass percentages: 4.0% metal chelating agent, 0.2% alkaline pH regulator, 0.3% nonionic surfactant, 95.5% solvent; the acidic reverse osmosis membrane cleaning agent It is composed of the following raw materials in the following mass percentages: 0.2% citric acid, 0.2% acidic pH regulator, and 99.6% solvent.

[0039] The metal chelating agent is composed of tetrasodium edetate and pentasodium diethylenetriaminepentaacetate with a mass ratio of 1:1; the alkaline pH regulator is sodium hydroxide; the non- The ionic surfactant is octylphenol polyoxyethylene ether; th...

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Abstract

The invention discloses a reverse osmosis membrane cleaning agent and an application method thereof. The reverse osmosis membrane cleaning agent comprises an alkaline reverse osmosis membrane cleaning agent and an acidic reverse osmosis membrane cleaning agent, which are independently stored. The alkaline reverse osmosis membrane cleaning agent comprises the following ingredients (by weight): 0.8-4.0% of a metal-chelator, 0.1-0.2% of an alkaline pH regulator, 0.1-0.3% of a nonionic surfactant, and the rest of a solvent. The acidic reverse osmosis membrane cleaning agent comprises the following ingredients (by weight): 0.1-0.2% of citric acid, 0.1-0.2% of an acidic pH regulator and the rest of a solvent. The application method comprises the following steps: cleaning with the alkaline cleaning agent, washing with clear water, and cleaning with the acidic cleaning agent. By the use of the reverse osmosis membrane cleaning agent, barium / stronlium precipitates can be effectively removed, water yield of a reverse osmosis system is effectively recovered, operation differential pressure of the reverse osmosis membrane is reduced, and service life of the reverse osmosis membrane is prolonged.

Description

technical field [0001] The invention relates to a cleaning agent, in particular to a reverse osmosis membrane cleaning agent and its application method. It belongs to the field of water treatment. Background technique [0002] With the increasing shortage of water resources in our country, large-scale coal chemical enterprises have more sewage to be recycled. Reverse osmosis membranes can effectively desalinate, and are often used as a check process unit for water treatment to meet standards. They have been widely used in various fields such as seawater desalination, pure water preparation, boiler feed water, wastewater treatment, and concentration of drinking water, beverages, and chemical products. . [0003] After the reverse osmosis device has been in operation for a period of time, substances such as colloids, metal oxides, bacteria, organic matter or scale will accumulate on the concentrated water side of the reverse osmosis membrane, resulting in fouling of the reve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D65/06
CPCB01D65/02B01D2321/162B01D2321/164
Inventor 彭自学邢保山曹余富张超张晓丽翟新军林宏伟卞小朋
Owner 西安合瑞环境工程有限公司