合成橡胶工业 |
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多层桨搅拌槽内的液-液分散特性
Liquid-liquid dispersion properties in a multi-blade agitated tank 包雨云 刘新卫 高正明 王英琛 黎树根 摘 要:在直径为0.476 m的椭圆底圆柱形搅拌槽内,以水/航空煤油及水/环己烷为实验体系,研究了Rushton涡轮式搅拌桨(RT-6)、六半椭圆管涡轮式搅拌桨(HEDT)、折叶轴流式搅拌桨及翼形轴流式搅拌桨(CBY)的6种不同组合桨的液-液分散特性,用取样法测定了分散相体积分数的轴向分布及体系澄清时间.结果表明,组合桨中的底桨在液-液分散中发挥了主要作用.单位体积输入功率相同时,底桨为CBY的组合桨进行液-液分散后,液滴的平均滴径最小,体系澄清时间较长;底桨为HEDT的组合桨的分散效果次之;底桨为RT-6的组合桨因滴径分布较宽,虽然平均滴径最大,但澄清时间也较长. |
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收稿日期:2003年12月29日 修稿日期:2004年6月14日 出版日期:2004年9月15日 |