Washing method for reverse osmosis membrance

A technology of reverse osmosis membrane and cleaning box, applied in the direction of semi-permeable membrane separation, chemical instruments and methods, membrane technology, etc., can solve problems affecting the effect of reverse osmosis treatment, so as to prevent scaling, improve the quality of produced water, and avoid damage Effect

Inactive Publication Date: 2018-08-31
SICHUAN AOHENG ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a cleaning method for reverse osmosis membranes, in order to solve the problem that sediments and organic coagulants remaining in liquid form insoluble polymers, which greatly affects the effect of reverse osmosis treatment

Method used

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Embodiment Construction

[0014] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0015] One embodiment of the present invention is a method for cleaning a reverse osmosis membrane, which includes the following steps: S1 puts the reverse osmosis membrane in a cleaning tank and leaves it still, the cleaning tank is a pressure vessel with a circulating water pump, and the cleaning tank in the cleaning tank Inject reverse osmosis produced water for pre-soaking; S2 inject acid cleaning agent after the above-mentioned reverse osmosis membrane pre-soaking for cyclic pickling, the pH value of the above-mentioned cyclic pickling is kept at 2 to 3; S3 After the above-mentioned pickling is completed, drain Clean t...

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Abstract

The invention discloses a washing method for a reverse osmosis membrance. The method comprises the steps that the reverse osmosis membrance is placed in a washing box for standing, preimpregnation andcirculating pickling with an acid washing agent, and is subjected to circulating water washing, soaking, circular alkali washing, fungicide spraying and washing, and the method aims to solve the problems that sediments and the residual organic flocculant in liquid form an insoluble polymer so as to greatly affect the effect of reverse osmosis treatment.

Description

technical field [0001] The invention relates to cleaning of reverse osmosis membranes, in particular to a cleaning method of reverse osmosis membranes. Background technique [0002] The reverse osmosis membrane is often used to control the membrane separation system. After the reverse osmosis membrane has been in operation for a period of time, there will be scaling deposits. The scaling deposits are formed by the pollution of suspended solids in water or insoluble salts. The common pollution is calcium carbonate precipitation , calcium sulfate precipitation, microorganisms, occasional metal oxides, silicon deposits; [0003] In the long-term use of the membrane separation system, if the sediment is not removed, the sediment and the organic coagulant remaining in the liquid will form an insoluble polymer, which will reduce the performance of the reverse osmosis membrane and easily lead to damage to the reverse osmosis membrane, which greatly affects the reverse osmosis treat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D65/02
CPCB01D65/02B01D65/022B01D2321/162B01D2321/164B01D2321/28
Inventor 刘耀中
Owner SICHUAN AOHENG ENVIRONMENTAL PROTECTION TECH CO LTD
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