多级气液鼓泡塔中筛板结构对气垫层高度及局部气含率的影响  

Effect of Sieve Plate Structure on Gas Cap Height and Local Gas Holdup in a Multistage Bubble Column Reactor

作　　者：秦岭[1] 靳海波[1] 杨索和[1] 何广湘[1] 朱建华[2] 

机构地区：[1]北京石油化工学院化工系,北京102617 [2]中国石油大学(北京)化工学院,北京102249

出　　处：《过程工程学报》2011年第1期9-14,共6页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:20776018);北京市自然科学基金资助项目(编号:2093034);北京市属高等学校人才强教深度计划基金资助项目(编号:PHR200906139)

摘　　要：采用压差法和双电导探针法考察了筛板结构对φ300mm多级鼓泡塔中筛板下侧气垫层高度和筛板上下两处局部气含率的影响.结果表明,气垫层高度随表观气速ug增加而增加,随开孔率降低而增加,当ug从0.04m/s增加到0.24m/s时,气垫层高度从0.01m增加到0.06m.而局部气含率的径向分布与普通鼓泡塔相似,都随ug增加而增加,随径向位置r/R增加而减小;筛板的引入使局部气含率在轴向方向发生较大变化,ug=0.027m/s时,筛板上下两侧的局部气含率均在0.05左右,但ug增加到0.11m/s时,下侧气含率则普遍增加到0.3～0.35,而上侧则在0.25～0.3之间,下侧普遍比上侧气含率高.The effect of sieve plate structure on the gas cap height and local gas holdup in a φ300 mm multistage bubble column was studied using differential-pressure method and double-sensor conductivity probe.The experimental results show that the gas cap height increases with the increase of superficial gas velocity,ug,and decrease of opening area of the sieve plates.The gas cap height increases from 0.01 to 0.06 m while ug increases from 0.04 to 0.24 m/s.Moreover,the radial distribution of gas holdup in the reactor is similar to that in a regular bubble column.The average gas holdups above and under the plate increase with the increase of ug.For the axial distribution of gas holdups,when ug is about 0.027 m/s,the gas holdups above and under the plate are all around 0.05.But when ug becomes 0.11 m/s,the gas holdup under the plate is about 0.3 0.35,which is much higher than the one above plate with around 0.25 0.3.

关 键 词：多级鼓泡塔 气垫层高度 压差法 双头电导探针法 局部气含率 

分 类 号：TQ016[化学工程]