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Special alkaline cleaning agent for reverse osmosis membrane and its application method

A technology of reverse osmosis membrane and cleaning agent, applied in the field of water treatment, can solve the problems of insignificant effect and weak formulation

Active Publication Date: 2016-06-22
WEIHAI XIANGYU TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The chemical cleaning formula in the existing cleaning technology is not very targeted. Although it is suitable for cleaning some polluted membrane elements, the effect is often not obvious for some special or seriously polluted membrane elements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Select raw materials by weight percentage

[0027] Sodium nitrilotriacetate 5%

[0028] Tetrasodium EDTA 5%

[0029] Hydroxyethylethylenediaminetriacetic acid 10%

[0030] Triethanolamine 30%

[0031] Polyaspartic acid 15%

[0032] Sodium hydroxide 3%

[0033] The rest is deionized water.

[0034] Mix deionized water, sodium nitrilotriacetate, tetrasodium ethylenediaminetetraacetic acid, hydroxyethylethylenediaminetriacetic acid, triethanolamine, sodium polyaspartate and sodium hydroxide in proportion to the raw materials of each component Add it into the reaction kettle and stir it thoroughly for 45-75 minutes to get the desired product.

[0035] Embodiment one

[0036] Select raw materials by weight percentage

[0037] Sodium nitrilotriacetate 5%

[0038] Tetrasodium EDTA 5%

[0039] Trisodium Hydroxyethylethylenediaminetriacetate 15%

[0040] Triethanolamine 25%

[0041] Polyaspartic acid 20%

[0042] Sodium hydroxide 3%

[0043] The rest is deionized w...

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PUM

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Abstract

The invention provides an alkaline cleaner special for a reverse osmosis membrane. The alkaline cleaner special for the reverse osmosis membrane comprises nitrilotriacetic acid salt, complexonate, hydroxyethyl ethylene diamine, (2-Hydroxyethyl) ethylenediaminetriacetic acid salt, alcamines, a dispersant, a pH conditioning agent and deionized water, wherein the mass ratio of nitrilotriacetic acid salt, complexonate, hydroxyethyl ethylene diamine, (2-Hydroxyethyl) ethylenediaminetriacetic acid salt, alcamines, the dispersant to the pH conditioning agent is 1-10 to 2-10 to 2-15 to 10-40 to 10-30 to 2-10 and the balance is deionized water. The invention further provides an application method for the alkalinity cleaning agent special for the reverse osmosis membrane. The alkaline cleaner is convenient to use and excellent in effect, and causes no harm to membrane components.

Description

technical field [0001] The invention belongs to the field of water treatment, in particular to an alkaline cleaning agent specially used for reverse osmosis membranes and an application method. Background technique [0002] Reverse osmosis is a membrane separation technology driven by pressure difference with the help of the function of selective permeable membrane. When the pressure applied to the system is greater than the osmotic pressure of the solution, water molecules pass through the membrane and enter the central tube through the water flow channel. Flow out at one end. Impurities entering the water (such as hardness ions, colloids, organic matter, and bacteria) are trapped on the water inlet side of the membrane and flow out from the concentrated water outlet, so as to achieve the purpose of separation and purification. At present, reverse osmosis technology has been widely used in seawater desalination, pure water preparation, boiler feed water, wastewater treatme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D65/06
Inventor 杨京霖李洪社喻果
Owner WEIHAI XIANGYU TECH