三相浅层鼓泡塔颗粒悬浮特性  

Solid Suspension Characteristics in a Three-phase Shallow Bubble Column

作　　者：蔡清白[1,2] 戴干策[2] 

机构地区：[1]上海华谊集团技术研究院,上海200241 [2]华东理工大学化学工程联合国家重点实验室,上海200237

出　　处：《过程工程学报》2011年第6期901-906,共6页The Chinese Journal of Process Engineering

摘　　要：研究了383mm的浅层鼓泡塔内高径比(H/DT)、气体分布器、固体浓度(Cs)对气含率和临界悬浮气速(Ugc)的影响.结果表明,当H/DT<1.5时,随H/DT增大,气含率增大,而Ugc明显下降;当H/DT>1.5时,气含率减小,Ugc变化不大,优化的H/DT约为1.5.采用四管管式气体分布器,当环径比(d/DT)为0.4时,Ugc最小.气含率随Cs增大而减小,Cs超过15%(φ)时,Ugc随Cs变化不大.最后,推导得到Ugc的经验关联式,可为工业反应器提供一定指导.The influences of aspect ratio（H/DT） ,gas sparger and solid concentration（Cs） on gas holdup and critical gas velocity of solid suspension（Ugc） were investigated in a 383 mm i.d. three-phase shallow bubble column. The results show that when H/DT is smaller than 1.5,gas holdup increases and Ugc decreases with the increase of H/DT. However,when H/DT is larger than 1.5,the effect of H/DT on Ugc is insignificant. Gas sparger has great effect on Ugc,when d/DT is equal to 0.4,the value of Ugc is minimum. Gas holdup decreases with the increase of Cs. The effect of Cs on Ugc is insignificant,when Cs is larger than 15%（φ） . Finally,the empirical correlation is proposed to describe their quantitative effects on Ugc to give some physical insights into the experimental phenomenon.

关 键 词：浅层鼓泡塔 临界悬浮气速 气含率 高径比 气体分布器 

分 类 号：TQ027.2[化学工程]