Cleaning agent composition and cleaning method for reverse osmosis membrane

A technology of composition and cleaning agent, applied in the direction of chemical instruments and methods, semipermeable membrane separation, membrane technology, etc., can solve problems such as cleaning schemes not mentioned, achieve good biodegradability, good cleaning and decontamination ability, avoid The effect of secondary pollution

Active Publication Date: 2013-06-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

US5499197 discloses an automatic control scheme for a reverse osmosis system. This reverse osmosis system is used to produce drinking water. Various indicators of the produced water are monitored through the automatic control system. The alarm indicates that the RO system needs to be cleaned and can stop the RO system itself if it is not cleaned effectively, but does not mention the specific cleaning method

Method used

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  • Cleaning agent composition and cleaning method for reverse osmosis membrane
  • Cleaning agent composition and cleaning method for reverse osmosis membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] This example is used to illustrate the cleaning composition of the present invention and the cleaning method of the reverse osmosis membrane.

[0057] Weigh dodecyl alcohol polyoxyethylene ether (purchased from Jiangsu Haian Petrochemical Factory Company, brand E-1206) 2kg, 2-phosphonic acid group-1,2,4-tricarboxylic butane (purchased from Shandong Province Taihe Water Treatment Co., Ltd., with a density of 1.272g / cm 3 (20°C)) 6g, acrylic acid / hydroxypropyl acrylate / 2-acrylamide-2-methylpropylsulfonic acid copolymer (purchased from Shandong Taihe Water Treatment Co., Ltd., brand TH-613) 4g, add 90kg to Ionized water, stirred to fully dissolve to form cleaning agent A1.

[0058] Weigh 0.75 kg of sodium bicarbonate, add 10 kg of deionized water, stir to make it fully dissolved, and form blowing agent solution B1.

[0059] according to figure 1 In the process shown, a two-stage two-stage reverse osmosis system is used to treat the raw water whose water quality parameter...

Embodiment 2

[0074] This example is used to illustrate the cleaning composition of the present invention and the cleaning method of the reverse osmosis membrane.

[0075] Take tetradecyl alcohol polyoxyethylene ether (purchased from Jiangsu Haian Petrochemical Factory Company, brand E-1406) 4.5kg, 2-phosphonic acid group-1,2,4-tricarboxylic butane (purchased from Shandong Provincial Taihe Water Treatment Co., Ltd., with a density of 1.272g / cm 3 (20°C)) 11g, acrylic acid / hydroxypropyl acrylate / 2-acrylamide-2-methylpropylsulfonic acid copolymer (purchased from Shandong Taihe Water Treatment Co., Ltd., brand TH-613) 8g, add 90kg to Ionized water, stirred to fully dissolve, forming cleaning agent A2. The pH value of the cleaning agent A2 was adjusted to 6.1 with NaOH to obtain a cleaning solution.

[0076] Weigh 1.4kg of sodium bicarbonate, add 10kg of deionized water, stir to make it fully dissolved, and form blowing agent solution B2.

[0077] According to the method of Example 1, the rev...

Embodiment 3

[0079] This example is used to illustrate the cleaning composition of the present invention and the cleaning method of the reverse osmosis membrane.

[0080] Weigh cetyl alcohol polyoxyethylene ether (purchased from Jiangsu Haian Petrochemical Factory Company, brand E-1606) 2.3kg, 2-phosphonic acid group-1,2,4-tricarboxylic butane (purchased from Shandong Provincial Taihe Water Treatment Co., Ltd., with a density of 1.272g / cm 3 (20°C)) 8g, acrylic acid / hydroxypropyl acrylate / 2-acrylamide-2-methylpropylsulfonic acid copolymer (purchased from Shandong Taihe Water Treatment Co., Ltd., brand TH-613) 6g, add 90kg to Ionized water, stirred to fully dissolve, forming cleaning agent A3. The pH value of the cleaning agent A3 was adjusted to 6.1 with NaOH to obtain a cleaning solution.

[0081] Weigh 0.9 kg of sodium bicarbonate, add 10 kg of deionized water, stir to make it fully dissolved, and form blowing agent solution B3.

[0082] According to the method of Example 1, the revers...

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Abstract

The invention relates to a cleaning agent composition, comprising an A agent and a B agent. The A agent and the B agent are stored independently. The A agent comprises a non-ionic surfactant and a dispersing agent, wherein the non-ionic surfactant is a fatty alcohol-polyoxyethylene ether; and the dispersing agent is selected at least one from an organic phosphonic acid, a poly-aspartic acid, a polyepoxysuccinic acid and a co-polymer and/or a homopolymer obtained by polymerization of at least one of an unsaturated organic acid, an unsaturated organic acid ester and an unsaturated organic acid anhydride. The B agent contains a foaming agent. The invention also relates to a method for cleaning a reverse osmosis membrane by using the above cleaning agent composition. A cleaning liquid prepared by the cleaning agent composition can clean the reverse osmosis membrane effectively, makes water yield of a reverse osmosis system restore basically, and can significantly reduce front-and-back pressure difference of the reverse osmosis membrane and reduce conductivity of produced water.

Description

technical field [0001] The invention relates to a cleaning agent composition and a method for cleaning a reverse osmosis membrane by using the cleaning agent composition. Background technique [0002] With global water pollution and water scarcity, water treatment equipment - reverse osmosis desalination device (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 devices in the late 1970s, but it was not until 1993 that TFC-HR high desalination new membranes appeared that great development was achieved. 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....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D65/06
Inventor 王亭王争尚荣欣郦和生
Owner CHINA PETROLEUM & CHEM CORP
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