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A kind of ultrafiltration membrane cleaning agent

A cleaning agent and ultrafiltration membrane technology, which is applied in the field of ultrafiltration membrane cleaning agents, can solve the problems of high price, short service life, and less recycling times, and achieve the effects of superior rinsing performance, reduced processing costs, and reduced cleaning frequency

Active Publication Date: 2015-12-30
NANTONG SUTONG SEPARATION ENG & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, all enterprises use commercially available general-purpose alkaline cleaning agents, which are not only expensive, but also have poor degreasing effects due to the lack of specificity of the formula, short service life after cleaning, and few recycling times, resulting in high operating costs for enterprises. high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] An ultrafiltration membrane cleaning agent, comprising in parts by weight: 7 parts of sodium dodecylbenzene sulfonate, 5 parts of sodium fatty alcohol polyoxyethylene ether sulfonate, 2 parts of carboxymethyl cellulose, and 3 parts of sodium citrate , 1 part of sodium carbonate, 2 parts of sodium hydroxide, 0.1 part of pectinase, 1 part of aliphatic polyoxyethylene ether, and 0.5 part of potassium silicate.

[0011] Before the above-mentioned ultrafiltration membrane cleaning agent is used, it is prepared into an aqueous solution with a mass percent content of 1%, and then the pH value of the aqueous solution is adjusted to 10-11.

[0012] The cleaning power of the obtained ultrafiltration membrane cleaning agent is 97.41%, the foam performance is 10.68mm, and the permeation flux of the cleaning agent after the ultrafiltration membrane unit is used for 0.5h reaches 500L / (m 2 h).

Embodiment 2

[0014] An ultrafiltration membrane cleaning agent, comprising in parts by weight: 12 parts of sodium dodecylbenzene sulfonate, 8 parts of sodium fatty alcohol polyoxyethylene ether sulfonate, 6 parts of carboxymethyl cellulose, and 9 parts of sodium citrate , 4 parts of sodium carbonate, 8 parts of sodium hydroxide, 0.6 parts of pectinase, 7 parts of aliphatic polyoxyethylene ether, 1.9 parts of potassium silicate, and 0.8 parts of polysodium phosphate.

[0015] Before the above-mentioned ultrafiltration membrane cleaning agent is used, it is prepared into an aqueous solution with a mass percent content of 1%, and then the pH value of the aqueous solution is adjusted to 10-11.

[0016] The detergency of the obtained ultrafiltration membrane cleaning agent is 95.68%, the foam performance is 11.08mm, and the permeation flux of the cleaning agent after the ultrafiltration membrane unit is used for 0.5h reaches 550L / (m 2 h).

Embodiment 3

[0018] An ultrafiltration membrane cleaning agent, comprising in parts by weight: 10 parts of sodium dodecylbenzene sulfonate, 7 parts of sodium fatty alcohol polyoxyethylene ether sulfonate, 5 parts of carboxymethyl cellulose, and 7 parts of sodium citrate , 2 parts of sodium carbonate, 6 parts of sodium hydroxide, 0.2 parts of pectinase, 4 parts of aliphatic polyoxyethylene ether, 1.3 parts of potassium silicate, and 3.5 parts of polysodium phosphate.

[0019] Before the above-mentioned ultrafiltration membrane cleaning agent is used, it is prepared into an aqueous solution with a mass percent content of 1%, and then the pH value of the aqueous solution is adjusted to 10-11.

[0020] The cleaning power of the obtained ultrafiltration membrane cleaning agent is 98.67%, the foam performance is 10.98mm, and the permeation flux of the cleaning agent after the ultrafiltration membrane unit is used for 0.5h reaches 520L / (m 2 h).

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Abstract

The invention provides a cleaning agent for an ultrafiltration membrane. The cleaning agent comprises the following components in parts by weight: 7 to 12 parts of sodium dodecyl benzene sulfonate, 5 to 8 parts of sodium fatty alcohol polyoxyethylene ether sulfonate, 2 to 6 parts of carboxymethylcellulose, 3 to 9 parts of sodium citrate, 1 to 4 parts of sodium carbonate, 2 to 8 parts of sodium hydroxide, 0.1 to 0.6 part of pectinase, 1 to 7 parts of aliphatic polyoxyethylene ether, and 0.5 to 1.9 parts of potassium silicate. The cleaning agent for the ultrafiltration membrane has the advantages that more than 95% of cleaning capacity is reached, the rinsing performance is outstanding, an ultrafiltration device is not endangered, the deterioration of the membrane can be avoided, and membrane flux can be recovered to normal level after cleaning and remained within a certain cycle; in addition, the cleaning frequency is reduced, the treatment cost is decreased, and the cleaning liquid waste is easily handled.

Description

technical field [0001] The invention belongs to the technical field of water treatment agents, and in particular relates to an ultrafiltration membrane cleaning agent. Background technique [0002] The oily wastewater from cold rolling mills of iron and steel companies mainly contains mineral oil, emulsifiers and other pollutants, and its direct discharge will bring serious pollution to the environment. Iron and steel enterprises generally use tubular aluminum oxide and zirconia ultrafiltration membranes for removal oil treatment. However, due to the formation of the solute gel layer and the concentration polarization of the ultrafiltration membrane, the ultrafiltration membrane will be fouled, resulting in a decrease in the membrane flux, a deterioration of the ultrafiltration effect, and even irreversible pollution of the membrane, resulting in serious losses. . Therefore, only by choosing an effective cleaning agent and cleaning method to restore the membrane flux and p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D65/06
Inventor 葛红军徐丽梅杨伟东邱玉梅沙嘉敏
Owner NANTONG SUTONG SEPARATION ENG & TECH
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