Compound cleaner for cleaning reverse osmosis membrane and preparation method of compound cleaner

A composite cleaning agent and reverse osmosis membrane technology, applied in the field of water treatment, can solve the problems of high cost and environmental protection, insignificant effect of old scale, large dosage of drugs, etc., to extend the service life, overcome incomplete cleaning, and prepare simple Effect

Inactive Publication Date: 2014-08-13
WEIHAI XIANGYU TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The early chemical cleaning agents were mostly single pickling or alkali cleaning, which often only cleaned part of the dirt, a

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] First, add 40g of aminotriacetic acid and 15g of sodium bisulfite into the mixer, dissolve them with reverse osmosis water or deionized water, control the temperature at 30°C, stir for half an hour and transfer them to the heating equipment, then put 25g of Add polyacrylic acid into the mixed solution and continue to stir. After half an hour, add 10g of sodium dodecylbenzenesulfonate and 15g of isothiazolinone and continue to stir, mix completely, and let it stand still for 2 to 3 hours.

[0024] How to use: Dilute the cleaning solution with reverse osmosis water or pure water at a ratio of 1:40~60, and control the pH between 2~3 to clean the system.

Embodiment 2

[0026] First, add 80g of aminotriacetic acid and 30g of sodium bisulfite into the mixer, dissolve them with reverse osmosis water or deionized water, control the temperature at 30°C, stir for half an hour and transfer them to the heating equipment, then put 50g of Add polyacrylic acid into the mixed solution and continue to stir. After half an hour, add 20g of sodium dodecylbenzenesulfonate and 30g of isothiazolinone and continue to stir, mix completely, and let it stand still for 2 to 3 hours.

[0027] How to use: Dilute the cleaning solution with reverse osmosis water or pure water at a ratio of 1:40~60, and control the pH between 2~3 to clean the system.

Embodiment 3

[0029] First, add 60g of DTPA and 20g of sodium bisulfite into the mixer, dissolve them with reverse osmosis water or deionized water, control the temperature at 30°C, stir for half an hour and then transfer them to the heating equipment, then add 40g of acrylic acid- Add the itaconic acid copolymer into the mixed solution and continue to stir. After half an hour, add 15g of sodium alkylbenzene sulfonate and 20g of dodecylxylyl ammonium chloride and continue to stir, mix completely, and stand still for 2 to 3 hours That's it.

[0030] How to use: Dilute the cleaning solution with reverse osmosis water or pure water at a ratio of 1:40~60, and control the pH between 2~3 to clean the system.

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PUM

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Abstract

The invention provides a compound cleaner for cleaning a reverse osmosis membrane and a preparation method of the compound cleaner. The compound cleaner comprises a chelating agent, a polymer, a surfactant, a bactericide and a reducing agent. Meanwhile, the invention also provides a preparation method of the compound cleaner for cleaning the reverse osmosis membrane. The compound cleaner provided by the invention has a relatively good cleaning effect on carbonate, phosphate, sulfate and zinc salt deposition, has an excellent effect on removing ferric oxide and hematite oxide, and can be widely applied to a polyaramid reverse osmosis membrane, a hollow fiber membrane, nanofiltration (NF) and ultrafiltration (UF). Due to the excellent cleaning effect, the use efficiency of the reverse osmosis membrane is increased, the service life of the reverse osmosis membrane can be prolonged, the times for replacing the reverse osmosis membrane can be reduced, and the cost is saved.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a water treatment agent, in particular to a composite cleaning agent for cleaning a reverse osmosis membrane system and a preparation method thereof. Background technique [0002] With the aggravation of water resources crisis and the continuous deterioration of water environment quality, water resources have evolved into an environmental issue that has attracted worldwide attention. Treating industrial and domestic wastewater and transforming it into potable water has become an important way to solve the water crisis. At present, the most advanced water treatment technology in the world is membrane reverse osmosis (RO) filtration. As an emerging unit process, membrane separation technology will play an increasingly important role in water treatment. In the past 30 years, reverse osmosis technology has entered industrial applications, mainly used in electronics, chemicals, food, p...

Claims

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Application Information

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IPC IPC(8): B01D65/06
Inventor 张晓冬李洪社喻果
Owner WEIHAI XIANGYU TECH
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