关键词: 海水淡化, 预处理, 纤维滤料, 过滤

Abstract: Preconditioning is an important process in the seawater desalination. Traditional seawater desalinization uses quartz sand as the filter material，which has disadvantages of low velocity jamming，and short filtration period. This paper investigated seawater filtration process using fiber ball and comet fiber filter. The results showed that turbidity of effluent was below 5.0 NTU with quartz sand particle size 0.45—0.6 mm at seawater velocity of 15 m/h. When the velocity of seawater was increased to 20 m/h，filtration period was shorted to 2 hours because of the rapid increase of head loss. At velocity of 20 m/h，stable effluent quality and the filtration cycle was as high as 50 h. With the large surface area，low resistance and large pollution-carrying capacity，fiber filter material performed more effectively in seawater purification.

Key words: seawater desalination, pretreatment, fiber, filtration