摘要
以接触絮凝理论为依据,将机械搅拌、斜管沉淀和污泥回流3种工艺有机结合用于海水预处理的增效澄清工艺。在进水量为300 L/h的条件下进行中试,优选快速搅拌G值、慢速搅拌G值和污泥回流比等工艺参数,评价无机絮凝剂及其与有机高分子助凝剂配合使用的除浊效果。结果表明,当快速搅拌G值为600 s-1,慢速G值为60 s-1、污泥回流比为2%时,选择三氯化铁与聚丙烯酰胺阳离子助凝剂配合使用,可使出水浊度降至(1.2±0.5)NTU,从而达到海水高效预处理的目的。
Based on the contact flocculation theory, an enhancing clarification technology was proposed by integrating mechanical agitation, inclined tube settler and sludge circulation. Scale tests were carried out when the flow rate at the inlet was 300 L/h, the effects of technological parameters such as G values of rapid and slow mixing, and sludge reflux ratio were studied. Turbidity removal efficiencies of inorganic coagulants were compared with inorganic coagulants combined with organic polymer flocculants. The resuits show that when G values are 600 s^-1 in rapid mixing zone and 60 s^-1 in slow mixing zone, sludge reflux ratio is 2% , FeCl3 accompanied with PAMC could decrease the water turbidity to （ 1. 2 ±0.5） NTU. The high efficiency of seawater pretreatment was obtained under these conditions.
出处
《化学工业与工程》
CAS
2010年第2期153-156,共4页
Chemical Industry and Engineering
基金
国家科技支撑计划项目(项目编号:2006BAB03A08)
中央级公益性科研院所基本科研业务专项资金项目(项目编号:K-JBYWF-2009-G15)
关键词
增效
澄清
海水
预处理
enhancing efficiency
clarification
seawater
pretreatment
