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.
出处
《过程工程学报》
CAS
CSCD
北大核心
2010年第6期1048-1053,共6页
The Chinese Journal of Process Engineering
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
bubbling column
sieve plate bubbling column
reciprocating plate column
liquid phase
axial diffusion coefficient
