Method for flushing reverse osmosis membrane

A reverse osmosis membrane and backwashing technology, applied in reverse osmosis, semi-permeable membrane separation, chemical instruments and methods, etc., can solve the pollution of the membrane filtration surface and the first stage of the reverse osmosis system, difficult to remove pollutants, and prolong the reverse osmosis system. Stable operation cycle and other problems, to achieve the effect of extending stable operation cycle, slowing concentration polarization, and improving the service life of membrane

Active Publication Date: 2011-05-11
CHINA PETROLEUM & CHEM CORP +1
View PDF1 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that the reverse osmosis system is fouled and clogged when the process water and circulating cooling water effluent of petrochemical enterprises are subjected to membrane advanced treatment, it is difficult to achieve a satisfactory cleaning effect by using conventional chemical cleaning methods. The present invention provides a An effective flushing meth

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for flushing reverse osmosis membrane
  • Method for flushing reverse osmosis membrane
  • Method for flushing reverse osmosis membrane

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0033] Example 1

[0034] A petrochemical company's olefin production plant process water, circulating cooling water sewage membrane method advanced treatment plant.

[0035] (1) Sewage water quality:

[0036] See Table 2 for the sewage water quality treated by the reverse osmosis device.

[0037] Table 2

[0038] Analysis Project

[0039] It can be seen from the above table that the COD, total silicon and biological content of the sewage treated by the process are relatively high. The total silicon is mostly in the form of organic silicon, and the main source is water quality stabilizer.

[0040] (2) Fouling of reverse osmosis membrane

[0041] Under the above-mentioned wastewater quality conditions, the RO system soon experienced first-stage fouling. Its performance is: the overall increase in operating pressure is not obvious, but the inter-section pressure difference (TMP) increases significantly. The results of the chemical cleaning of the RO system show that the conventional ch...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a method for flushing a reverse osmosis (RS) membrane, which aims at the problems of filtration surface contamination and first-section contamination of a reverse osmosis system membrane caused by high salt, organic colloidal silica, high molecular organic contaminants and microbiological remains during reverse osmosis treatment of olefin production process water, circulating cooling water and sewerage. In the method, positive flushing and concentrated water side reverse flushing are adopted, and agents such as an organic solvent and the like are matched, so hydraulic flushing is formed on the RO membrane filtration surface, blocking contaminants on the membrane surface which cannot be chemically removed are obviously removed, the problem of the first-section contamination of a membrane system is solved, and stable running period of the RO system is prolonged.

Description

technical field [0001] The invention relates to a method for flushing reverse osmosis membranes, in particular to a method for surface pollution of reverse osmosis membranes caused by inorganic salts, organic silica colloids, high molecular organic pollutants, and bacteria and algae residues in the advanced treatment and reuse of sewage in petrochemical enterprises. rinse method. Background technique [0002] At present, the reverse osmosis process (referred to as RO) is one of the main methods for the advanced treatment and reuse of sewage. Due to the characteristics of petrochemical wastewater, especially the process water of chemical olefin production equipment and the sewage of circulating cooling water, the water quality is poor, the water quality is complex, the content of colloids and cations, bacteria and algae is high, and it is easy to cause fouling to the reverse osmosis system. [0003] At present, conventional chemical cleaning is usually adopted for fouling of...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01D65/02B01D61/10C02F1/44
Inventor 邢琳刘正张英雄平春霞
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap