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Alkaline cleaner for reverse osmosis membrane, and application method of alkaline cleaner

A reverse osmosis membrane and cleaning agent technology, applied in the direction of reverse osmosis, semi-permeable membrane separation, chemical instruments and methods, etc., can solve the problems of little knowledge about the interaction of pollution, achieve excellent cleaning effect, improve wettability, and increase penetration effect of ability

Inactive Publication Date: 2017-12-15
SHANDONG TIANQING TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the operation of a reverse osmosis plant, different types of pollution often occur simultaneously and interact with each other, but little is known about the interaction between different types of pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] An alkaline cleaning agent for reverse osmosis membranes, using water as the solvent and adding according to the total mass percentage of the cleaning agent:

[0039] Tetrasodium ethylenediaminetetraacetic acid 1.5%

[0040] Sodium dodecylbenzene sulfonate 0.1%

[0041] Sodium hydroxide 0.1%

[0042] Sodium tripolyphosphate 1%

[0043] PEG 0.1%

[0044] Non-oxidizing bactericide isothiazolin copper 300ppm

[0045] The raw materials are added to the cleaning water tank, and the cleaning pump is turned on and soaked into the cleaning process.

Embodiment 2

[0047] An alkaline cleaning agent for reverse osmosis membranes, using water as the solvent and adding according to the total mass percentage of the cleaning agent:

[0048] Tetrasodium ethylenediaminetetraacetic acid 2.5%

[0049] Sodium dodecylbenzene sulfonate 0.1%

[0050] Sodium hydroxide 0.1%

[0051] PEG 0.1%

[0052] Non-oxidizing bactericide isothiazolin copper 300ppm

[0053] The raw materials are added to the cleaning water tank, and the cleaning pump is turned on and soaked into the cleaning process.

Embodiment 3

[0055] An alkaline cleaning agent for reverse osmosis membranes, using water as the solvent and adding according to the total mass percentage of the cleaning agent:

[0056] Sodium dodecylbenzene sulfonate 0.1%

[0057] Sodium hydroxide 0.1%

[0058] Sodium tripolyphosphate 2.5%

[0059] PEG 0.1%

[0060] Non-oxidizing bactericide isothiazolin copper 300ppm

[0061] The raw materials are added to the cleaning water tank, and the cleaning pump is turned on and soaked into the cleaning program.

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PUM

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Abstract

The invention relates to an alkaline cleaner for a reverse osmosis membrane. The alkaline cleaner takes water as a solvent and comprises a chelating agent, an anionic surfactant, a non-oxidizing bactericide and PEG, wherein the chelating agent is selected from at least one of polyphosphate, sodium ethylenediaminetetraacetate and nitrilotriacetic acid; and the anionic surfactant is selected from at least one of C8-C16 alkylbenzene sulfonate. The cleanser is very helpful to removal of pollutants of colloids, organic matters, microbial impurities, sulfate scale and the like in the reverse osmosis membrane system.

Description

Technical field [0001] The invention belongs to the technical field of water treatment, and particularly relates to an alkaline cleaning agent for reverse osmosis membranes and an application method thereof. Background technique [0002] With global water pollution and water scarcity, water treatment equipment-reverse osmosis desalination unit (RO) has developed rapidly since the first high-performance membrane was made in the United States in the late 1950s. my country first adopted reverse osmosis desalination equipment in the late 1970s, but it was not until the emergence of a new TFC-HR high desalination membrane in 1993 that it achieved greater development. [0003] Reverse osmosis is a membrane separation technology that uses the function of selective permeability membranes and is driven by pressure difference. When the pressure applied by the system is greater than the osmotic pressure of the solution, water molecules permeate the membrane and enter the central tube through ...

Claims

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Application Information

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IPC IPC(8): B01D65/06B01D61/02C02F1/44
Inventor 王金明梁清雷王俊明张雷李晓郑萍苗吉宾张少尉
Owner SHANDONG TIANQING TECH DEV
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