摘要
对炼油厂净化水回用过程结垢原因进行分析,针对结垢成因采用陶瓷膜对净化水做深度处理,而经膜处理后净化水pH在6.9左右,净化水呈中性,试图使得炼油净化水达到工艺水回用目的。着重考察了膜孔径、操作压差、膜面流速、料液温度等对膜通量的影响。结果表明,孔径为50nm的氧化锆陶瓷膜处理炼油净化水其渗透通量高达800L·m-·2h-1,渗透液中COD小于200mg·L-1;体系的操作压差可控制在0.25MPa,较大的膜面流速大和料液温度有利于渗透通量的提高;膜污染的清洗采用在线反冲和离线化学清洗的方法,料液渗透通量可恢复到新膜的95%。
A detailed analysis of the water and scale was carried out to educed mechanism and effective means. In the experiment part about ceramic membrane treat refinery purified water, the pH value of treated purified water was 6.9. The results showed that ceramic membrane with pore size around 50 nm not only meet the water requirement, but also owed high permeation flux （800 L .m^-2 .h^-1）, the COD content is less than 200 mg .L^-1 in the permeated side. Operation pressure should be controlled in 0.25 MPa. Higher temperature is better to increases of flux. The gas-liquid back-flush technology can keep high permeate flux, refinery purified water permeate flux could return to 95% of the originality.
出处
《水处理技术》
CAS
CSCD
北大核心
2010年第4期101-103,114,共4页
Technology of Water Treatment
基金
国家高技术研究发展计划(863)项目(2007AA06A402)
关键词
炼油净化水
垢
陶瓷膜
废水处理
refinery purified water
scale
ceramic membrane
wastewater treatment
