The development of the spiral-wound reverse osmosis(RO) modules

✍ Scribed by Hu Bingchen; Ren Deqian; Xu Rongan; Yu Dingyi

• Publisher: Elsevier Science
• Year: 1985
• Tongue: English
• Weight: 617 KB
• Volume: 54
• Category: Article
• ISSN: 0011-9164
• DOI: 10.1016/0011-9164(85)80009-6

✦ Synopsis

The four-inch diameter spiral-wolind RO membrane elements have been developed successfully. The membrane element (type-SRC-401) is 965 millimeter long. A demonstrating prototype, designated SRO-80-1000, has been designed and fabricated by using the type-SRC-401 spiral-wound membrane elements. This paper describes in detail capital specifications about this membrane element and the operating performance of the prototype. The SRC-401 membrane element incorporating cellulose acetate (CA) membrane provides water productivity of 3.5-4.5m'/day and salt rejection of 85-90%, at an applied pressure of 30kg/cm', tap water as raw water and feed temperature of 25 C. The prototype is now first spiral-wound RO pure-water installation which was designed and fabricated in China.

It consists of five modules. The prototype for producing primary pure-water has operated more than 3000 hours in a plant. The operating results showihat its performance is stable, average salt rejection is about 90% with water productivity 30-35m'/day, recovery more than TO%, and the flux decline slope of(-0.01) or so.

This installation can be used to produce ultra-pure water for electronic industry and high pressure boiler by combining with ion-exchange demineralizer, and to get potable water from brackish water with low salinity and so on.