Special pickling cleaning agent for reverse osmosis and preparation method thereof

A special acid and reverse osmosis technology, applied in reverse osmosis, chemical instruments and methods, osmosis/dialysis water/sewage treatment, etc. Incomplete pollution and other problems, to achieve significant removal effect, increased synergistic effect, and mild operating conditions

Inactive Publication Date: 2020-07-24
新疆水处理工程技术研究中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After cleaning, it can only temporarily improve the operation status of the system, but because the cleaning and decontamination are not thorough, the operation maintenance time is not long, the membrane will be polluted again, and the operating parameters of the system cannot reach the ideal parameters, so it often needs to be cleaned again

Method used

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  • Special pickling cleaning agent for reverse osmosis and preparation method thereof
  • Special pickling cleaning agent for reverse osmosis and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The specific preparation process of the special pickling cleaning agent for reverse osmosis is as follows:

[0036] 1. Dosing each raw material according to the following parts by mass:

[0037] 30 parts of organic acid (10 parts of thiocarboxylic acid, 10 parts of hydrofluoric acid, 10 parts of ethylenediaminetetraacetic acid), 3 parts of ethylenediaminetetraacetic acid salt, 3 parts of isothiazolinone, 5 parts of sodium chloride, 1 Parts of polyoxyethylene ether and 58 parts of water;

[0038] 2. Mix organic acid, ethylenediamine tetraacetate, isothiazolinone, and sodium chloride and add it to a variable-speed mixer, and stir for 20 minutes at a temperature of 20°C to obtain a mixture A;

[0039] 3. Mix mixture A and polyoxyethylene ether into a variable speed mixer at a temperature of 20°C and continue stirring for 30 minutes to obtain the invented acidic cleaning agent for reverse osmosis;

[0040] 4. Packaging, testing, and forming products for sale.

Embodiment 2

[0042] The specific preparation process of the special pickling cleaning agent for reverse osmosis is as follows:

[0043] 1. Dosing each raw material according to the following parts by mass:

[0044] 50 parts of organic acid (20 parts of sulfamic acid, 20 parts of glycolic acid, 10 parts of sulfinic acid), 6 parts of diethylene triamine pentacarboxylate, 5 parts of isothiazolinone, 12 parts of sodium nitrate, 4 parts of polyoxygen Ethylene and 23 parts of water;

[0045] 2. Mix the organic acid, ethylene triamine pentacarboxylate, isothiazolinone, and sodium nitrate into a variable-speed mixer, and stir at 60°C for 10 minutes to obtain mixture A;

[0046] 3. Dissolve the mixture A and polyoxyethylene and mix them into a variable-speed mixer at a temperature of 55°C, and continue to stir for 10 minutes to obtain the invented acidic cleaning agent for reverse osmosis;

[0047] 4. Packaging, testing, and forming products for sale.

Embodiment 3

[0049] The specific preparation process of the special pickling cleaning agent for reverse osmosis is as follows:

[0050] 1. Dosing each raw material according to the following parts by mass:

[0051]36 parts of organic acid (15 parts of carboxylic acid, 11 parts of sulfonic acid, 10 parts of oxalic acid), 5 parts of polyacrylic acid, 4 parts of formaldehyde solution (the concentration of formaldehyde solution is 30wt%), 10 parts of potassium chloride, 3 parts of polyoxyethylene Ether and 42 parts of water;

[0052] 2. Mix organic acid, polyacrylic acid, formaldehyde solution and potassium chloride and add it to a variable speed mixer, and stir at 40°C for 15 minutes to obtain mixture A;

[0053] 3. Dissolved the mixture A and polyoxyethylene, mixed them into a variable-speed mixer at a temperature of 40°C, and continued to stir for 20 minutes to obtain the invented acidic cleaning agent for reverse osmosis;

[0054] 4. Packaging, testing, forming products for sale.

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Abstract

The invention provides a special pickling cleaning agent for reverse osmosis and a preparation method thereof, and the special pickling cleaning agent for reverse osmosis is mainly prepared from the following raw materials in parts by mass: 30-50 parts of organic acid, 3-5 parts of bactericide, 3-6 parts of complexing agent, 5-12 parts of inorganic salt, 1-4 parts of surfactant and a proper amountof water. The special pickling cleaning agent for reverse osmosis ensures that carbonate dirt possibly existing on the surface of a membrane element and dirt blockage caused by most metal oxides arecleaned through chemical reaction under the condition that the pH value is 2-3; according to the special pickling cleaning agent for reverse osmosis, water flows through the membrane to physically wash dirt on the surface of the membrane, a stripping effect is achieved, after the cleaning agent is used for cleaning, the operation flux and the pressure difference of the reverse osmosis membrane canbe basically recovered to the level before pollution, the stability is good, and it can be guaranteed that the membrane assembly cannot be polluted after long-time operation after cleaning.

Description

technical field [0001] The invention relates to the field of membrane module cleaning, in particular to a special pickling cleaning agent for reverse osmosis and a preparation method thereof. Background technique [0002] In recent years, reverse osmosis membrane technology has developed rapidly in the application of water treatment. During the operation of the reverse osmosis system, the surface of the reverse osmosis membrane will be separated due to the existence of colloids, organic matter, microorganisms, mud and other substances in the raw water and membrane separation. During the process, the concentration of insoluble substances will cause deposition, and then form the pollution of the reverse osmosis membrane. The pollution of the reverse osmosis membrane includes the adsorption of colloidal particles, inorganic scaling and the growth of microorganisms. After the reverse osmosis membrane is polluted, it will appear The decline in membrane performance, such as the re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D65/06B01D61/02C02F1/44
CPCB01D61/025B01D65/02B01D2321/162B01D2321/168C02F1/441C02F2303/14
Inventor 余莉宋勇李红丽
Owner 新疆水处理工程技术研究中心有限公司
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