Cleaning method for reverse osmosis membrane of sea water desalination

A technology of reverse osmosis membrane and clean water, applied in chemical instruments and methods, seawater treatment, semi-permeable membrane separation, etc., can solve the problems of large maintenance workload, high maintenance cost, easy to have pipeline joints, etc., to ensure the online operation rate , the effect of shortening cleaning time and reducing costs

Inactive Publication Date: 2017-09-22
青岛百发海水淡化有限公司
View PDF2 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the heavy maintenance workload of the large-scale reverse osmosis membrane group and the leakage of pipe j

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
  • Cleaning method for reverse osmosis membrane of sea water desalination
  • Cleaning method for reverse osmosis membrane of sea water desalination
  • Cleaning method for reverse osmosis membrane of sea water desalination

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] Embodiment 1: A cleaning method for a reverse osmosis membrane for seawater desalination. The cleaning method includes an online cleaning method and a shutdown maintenance cleaning method. The steps of the online cleaning method include:

[0020] (1) Configure a pH of 12 and a mass fraction of 0.03% sodium dodecyl sulfonate solution, and perform variable flow circulation on the reverse osmosis membrane group, with a circulation flow of 500m 3 / h cycle for 15 minutes, the flow rate will rise to 1000m within 15 seconds 3 / h cycle for 15 minutes, the flow rate will rise to 1400m within 15 seconds 3 / h circulate for 15 minutes, then reduce the flow to 500m in 25 seconds 3 / h, repeat the cycle for 3 hours;

[0021] (2) Rinse the reverse osmosis membrane group with clean water;

[0022] (3) Configure a sulfuric acid solution with a pH of 2, and cycle the reverse osmosis membrane group for 2 hours, with a flow rate of 1000m 3 / h;

[0023] (4) Rinse the reverse osmosis membrane group wi...

Example Embodiment

[0028] Embodiment two:

[0029] A method for cleaning a reverse osmosis membrane for seawater desalination. The cleaning method includes an online cleaning method and a shutdown maintenance cleaning method. The steps of the online cleaning method include:

[0030] (1) Configure a pH of 12 and a mass fraction of 0.03% sodium dodecyl sulfonate solution, and perform variable flow circulation on the reverse osmosis membrane group, with a circulation flow of 500m 3 / h cycle for 15 minutes, the flow rate will rise to 1000m within 15 seconds 3 / h cycle for 15 minutes, the flow rate will rise to 1400m within 15 seconds 3 / h circulate for 15 minutes, then reduce the flow to 500m in 25 seconds 3 / h, repeat the cycle for 3 hours;

[0031] (2) Rinse the reverse osmosis membrane group with clean water;

[0032] (3) Configure a sulfuric acid solution with a pH of 2, and cycle and flush the reverse osmosis membrane group for 2 hours, with a flow rate of 1400m 3 / h;

[0033] (4) Rinse the reverse osmos...

Example Embodiment

[0035] Embodiment three:

[0036] A method for cleaning a reverse osmosis membrane for seawater desalination. The cleaning method includes an online cleaning method and a shutdown maintenance cleaning method. The steps of the online cleaning method include:

[0037] (1) Configure a pH of 12 and a mass fraction of 0.03% sodium dodecyl sulfonate solution, and perform variable flow circulation on the reverse osmosis membrane group, with a circulation flow of 500m 3 / h cycle for 15 minutes, the flow rate will rise to 1000m within 15 seconds 3 / h cycle for 15 minutes, the flow rate will rise to 1400m within 15 seconds 3 / h circulate for 15 minutes, then reduce the flow to 500m in 25 seconds 3 / h, repeat the cycle for 3 hours;

[0038] (2) Rinse the reverse osmosis membrane group with clean water;

[0039] (3) Configure a sulfuric acid solution with a pH of 2, and cycle the reverse osmosis membrane group for 2 hours, with a flow rate of 1200m 3 / h;

[0040] (4) Rinse the reverse osmosis membr...

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 discloses a cleaning method for a reverse osmosis membrane of sea water desalination. The cleaning method comprises an online cleaning method and a shutdown maintaining and cleaning method. The online cleaning method mainly utilizes a sudden flow change mode to quickly clean the reverse osmosis membrane, so that time and labor are saved; the shutdown maintaining and cleaning method mainly utilizes an interval mass-flow washing and intermediate water replenishing mode, so that not only are chemicals saved, but also water consumption is reduced, energy is saved, and consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of cleaning and maintenance methods for reverse osmosis membranes, in particular to a cleaning method for reverse osmosis membranes for seawater desalination. Background technique [0002] In seawater desalination projects, during the long-term high-load operation of the reverse osmosis membrane group, the pressure difference and water production performance will gradually deteriorate. Routine off-line chemical cleaning of reverse osmosis membranes restores performance, but is time consuming. The cleaning time will affect the total water production of the reverse osmosis process section and affect the water production of the whole plant. [0003] For large polyamide reverse osmosis membranes. When the equipment is shut down for a long time, according to the requirements of the membrane manufacturer, it is necessary to add sodium bisulfite solution to the entire reverse osmosis membrane group to protect the...

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): B01D65/02C02F1/44C02F103/08
CPCB01D65/02B01D2321/162B01D2321/168C02F1/441C02F2103/08C02F2303/14Y02A20/131
Inventor 张晓东杨兴涛李珂赵洪武刘长青吴成志张卫军潘光建万鹏于崇勤李伟孙勇飞汤军强刘祯郭成祥袁陆王成龙于勇
Owner 青岛百发海水淡化有限公司
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