四川大学学报：工程科学版2012，Vol.44Issue(4)：185-190,6.
无挡板搅拌槽的固液悬浮特性
Solid-liquid Suspension in an Unbaffied Stirred Tank
摘要
Abstract
The silica sand-water two-phase suspension in an unbaffled stirred tank agitated by a standard Rushton turbine was experi- J mentally studied using the PC - 6D particle concentration measuring instrument. The critical suspension speeds under different impeller / off-bottom clearance and ）ilnpeller-to-tank diameter ratios were measured and compared with those in the baffled stirred tank. The solids concentration and power profiles under different operating conditions were analyzed. Results showed thal the critical suspension speed and power number for the unbaffled stirred tank are smaller than those in the baffled stirred tank. Both cf them were found to increase with increase of the off-bottom clearance and decrease with increase of the impeller size at constant tank diameter. For the unbaffled sus- pension operation, the suspension is the best with impeller off-bottom clearance C = T/5 .and impeller-to-tank diameter ratio D = 1＂/3. There is no help to improve the suspension uniformity by increasing the impeller-to-tank diameter ratio or the impeller rotational speed.关键词
无挡板搅拌槽/固液悬浮/临界悬浮转速/浓度分布/功率消耗Key words
unbaffled stirred tank/solid-liquid suspension/critical suspension speed/concentration distribution/power consumption分类
化学工程引用本文复制引用
杨锋苓,周慎杰,张翠勋,王贵超..无挡板搅拌槽的固液悬浮特性[J].四川大学学报：工程科学版,2012,44(4):185-190,6.基金项目
山东省科技攻关基金资助项目 （）
山东大学自主创新基金资助项目 （）
