HYDRODYNAMIC CHARACTERISTICS IN EXTERNAL-LOOP AIRLIFT SLURRY REACTORS
The hydrodynamic characteristics in an external-loop airlift were investigated and the influences of operating conditions on gas holdup and slurry circulating velocity were analyzed.Three measurement methods were used to obtain the values of gas holdup and the results showed that these methods were of good accuracies.Three types of gas distributors were used during the hydrodynamic experiments,and the pipe ring distributor with hold at the bottom was recommended based on the experimental data comparison.It was found the relationship between gas holdup and slurry circulating velocity was linear,and correlations were developed to predict the values of slurry circulating velocity with average error less than 20％.
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