Dirt cleaning agent for reverse osmosis membrane

A technology of reverse osmosis membrane and cleaning agent, which is applied in the field of fouling cleaning agent for reverse osmosis membrane, which can solve the problems of reduced water production, decreased system desalination rate, fouling of reverse osmosis membrane, etc., to prolong membrane life and maintain membrane flux , Improve the effect of cleaning efficiency

Inactive Publication Date: 2018-05-15
XINJIANG DELAND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The nature and pollution speed of pollutants are related to the water supply conditions. Pollution is formed slowly. If measures are not taken early, pollution will lead to reverse osmosis membrane fouling in a relatively short period of time, damage the performance of membrane elements, and cause system desalination. Efficiency drop, permeate drop, pressure difference increase, etc. affect the normal operation of the reverse osmosis device, and in severe cases lead to the scrapping of the reverse osmosis membrane

Method used

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  • Dirt cleaning agent for reverse osmosis membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A dirt cleaning agent for a reverse osmosis membrane, comprising the following components by weight percentage: 15% sodium fatty alcohol polyoxyethylene ether sulfate, 28% sodium dodecylbenzenesulfonate, 0.8% metal complexing agent, Anti-sedimentation agent 3.8%, lauryl diethanolamine 17.6%, sodium xylene sulfonate 8%, sodium chloride 3.5%, sodium sulfate 0.4%, bactericide 0.8% and the balance of deionized water.

[0028] The metal complexing agent is triethanolamine; the anti-deposition agent is coconut oil monoethanolamine; the fungicide is DBNPA.

[0029] A preparation method of dirt cleaning agent for reverse osmosis membrane, the method steps are as follows:

[0030] S1: Stir the anionic surfactant, metal complexing agent, anti-sedimentation agent, lauroyl diethanolamine, sodium xylene sulfonate and deionized water at 45°C for 20min at a stirring speed of 500rpm;

[0031] S2: When the temperature of S1 drops to 30°C, add the fungicide, stir for 10 minutes, and the...

Embodiment 2

[0034] A dirt cleaning agent for a reverse osmosis membrane, comprising the following components by weight percentage: 17% sodium fatty alcohol polyoxyethylene ether sulfate, 28.5% sodium dodecylbenzenesulfonate, 0.8% metal complexing agent, 4.0% of anti-deposition agent, 19% of lauroyl diethanolamine, 8.2% of sodium xylene sulfonate, 3.8% of sodium chloride, 0.5% of sodium sulfate, 0.85% of bactericide and the balance of deionized water.

[0035] The metal complexing agent is triethanolamine; the anti-deposition agent is coconut oil monoethanolamine; and the bactericide is isothiazolinone.

[0036] A preparation method of dirt cleaning agent for reverse osmosis membrane, the method steps are as follows:

[0037] S1: Stir the anionic surfactant, metal complexing agent, anti-deposition agent, lauroyl diethanolamine, sodium xylene sulfonate and deionized water at 55°C for 25 minutes, and the stirring speed is 600rpm;

[0038] S2: When the temperature of S1 drops to 35°C, add th...

Embodiment 3

[0041] A dirt cleaning agent for reverse osmosis membranes, comprising the following components by weight percentage: fatty alcohol polyoxyethylene ether sodium sulfate 18%, sodium dodecylbenzenesulfonate 28.8%, metal complexing agent 1%, 9.5% of anti-deposition agent, 20% of lauroyl diethanolamine, 8.3% of sodium xylene sulfonate, 3.6% of sodium chloride, 0.4% of sodium sulfate, 0.8% of bactericide and the balance of deionized water.

[0042] The metal complexing agent is triethanolamine; the anti-deposition agent is coconut oil monoethanolamine; the fungicide is DBNPA.

[0043] A preparation method of dirt cleaning agent for reverse osmosis membrane, the method steps are as follows:

[0044] S1: Stir the anionic surfactant, metal complexing agent, anti-sedimentation agent, lauroyl diethanolamine, sodium xylene sulfonate and deionized water at 50°C for 30 min at a stirring speed of 550 rpm;

[0045] S2: When the temperature of S1 drops to 32°C, add the fungicide, stir for 15 m...

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Abstract

The invention relates to a dirt cleaning agent for a reverse osmosis membrane. The dirt cleaning agent for the reverse osmosis membrane comprises the following components in percentage by weight: 43 to 50 percent of an anionic surfactant, 0.8 to 1 percent of a metal complexing agent, 3.8 to 4.5 percent of an anti-deposition agent, 17.6 to 20.2 percent of lauryl diethanolamine, 8 to 8.5 percent ofsodium xylene sulfonate, 3.5 to 4.0 percent of sodium chloride, 0.4 to 0.6 percent of sodium sulfate, 0.8 to 1.0 percent of a sterilizing agent and the balance of deionized water. According to the dirt cleaning agent for the reverse osmosis membrane, which is provided by the invention, the anionic and nonionic surfactant is added in the cleaning agent, so the cleaning efficiency of the cleaning agent is greatly improved; the membrane flux can be maintained and the life of the membrane can be prolonged; the surfactant which the cleaning agent contains can permeate rapidly, so dirt can be removed effectively; the sterilizing agent DBNPA is added, so that microorganisms are killed and cleaning is realized; and due to the excellent bacteriostatic function of the sterilizing agent, the microorganisms are not liable to grow continuously and damage to the membrane caused by multi-time cleaning is avoided.

Description

technical field [0001] The invention belongs to the technical field of reverse osmosis membrane cleaning, and in particular relates to a dirt cleaning agent for reverse osmosis membranes. 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 (such as ions, colloids, organic matter, bacteria) entering the water are trapped on the inlet side of the membrane and flow out from the concentrated water outlet to achieve the purpose of separation and purification. Therefore, reverse osmosis technology has developed into an important water treatment technology. At present, reverse osmosis technology has been widely used in the concentration,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D65/02B01D65/06
CPCB01D65/02
Inventor 陈辉周爱珍王刚
Owner XINJIANG DELAND
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