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《中国化学工程学报(英文版)》 2006-01
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The Effect of Sparger Geometry on Gas Bubble Flow Behaviors Using Electrical Resistance Tomography

JIN Haibo a,*, M. Wangb and R. A. Williamsb a Department of Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China b School of Process, Environmental and Material Engineering, University of Leeds, Leeds LS2 9JT, UK  
By electrical resistance tomography (ERT) the cross sectional profiles of gas hold-up in a φ56mm bubble column are obtained with four designs of gas sparger. The effect of sparger geometry on the bubble distribution is re-vealed by applying a sensitivity conjugated gradients reconstruction method (SCG). Experimental results show that over-all hold-up obtained by ERT is generally in good agreement with those measured with the pressure transducer and the ERT system produces informative evidence that the radial profiles of hold-up is very similar to the sparger design in the lower section of bubble column. Meanwhile, the rise velocity of bubble swarm and the Sauter mean bubble size are evaluated using ERT based on dynamic gas disengagement theory. The experimental results are in good agreement with correlations and conventional estimation obtained using pressure transmitter methods.
【CateGory Index】: TQ021
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