不同类型鼓泡塔气液并流时液相轴向扩散系数  

Liquid Phase Axial Diffusion Coefficients of Gas-Liquid Concurrent Flow in Different Types of Bubbling Column

作　　者：安钢[1] 孙波[1] 安以弘 张艳[1] 陈健康[1] 

机构地区：[1]天津理工大学化学化工学院,天津300384 [2]东方电气(天津)风电科技有限公司,天津300462

出　　处：《过程工程学报》2010年第6期1048-1053,共6页The Chinese Journal of Process Engineering

摘　　要：在相同尺寸的鼓泡塔、筛板鼓泡塔、振动筛板鼓泡塔中采用脉冲示踪法对空气-水体系进行轴向返混实验研究,考察了水和空气流速对鼓泡塔、鼓泡筛板塔液相轴向扩散系数(EZ)和水、气体流率、筛板振动强度对振动筛板鼓泡塔液相轴向扩散系数的影响.结果表明,鼓泡塔EZ与uL0.696～1.158成正比(uL为液速);筛板鼓泡塔EZ与uL和气速(uG)关系式为EZ=0.798uG0.77uL1.252;振动筛板鼓泡塔的EZ与uL0.8354～1.2740成正比.The axial back-mixing flow in air-water system was experimentally investigated by using a pulse tracer method in bubbling column,sieve plate bubbling column and reciprocating plate column with the same size,respectively. The effects of flow velocities of water and air on liquid phase axial diffusion coefficients of the bubbling and sieve plate bubbling columns were measured,and the effects of flow velocities of water and air and the sieve vibration intensity on liquid phase axial diffusion coefficients of reciprocating plate column. The results show that the liquid-phase axial-dispersion coefficient in the bubble column is proportional to the flow velocity of liquid to the power of 0.696～1.158,the liquid-phase axial-dispersion coefficient in the sieve plate bubble column can be expressed as EZ=0.798uG0.77uL1.252,and the liquid-phase axial-dispersion coefficient in the sieve plate bubble column is proportional to the flow velocity of liquid to the power of 0.8354～1.2740.

关 键 词：鼓泡塔 筛板鼓泡塔 振动筛板鼓泡塔 液相 轴向扩散系数 

分 类 号：TQ021.4[化学工程]