The jet bubbling reactor uses liquid jet to achieve the liquid mixing instead of mechanical stirring

which brings several advantages such as simple structure and low cost of maintenance and manufacturing. The research of its mixing characteristics plays a significant role in the design

optimization and scaling up of the reactor. Based on the air-water system

the electrolyte tracer (KCl solution) method was applied to investigate the influences of gas velocity and jet Reynolds number on the liquid mixing time with the cold model experimental apparatus. The mixing mechanism in jet bubbling reactor had also been analyzed from the perspective of power input. The results showed that within the experimental range (ug from 0.0006 to 0.0343 m·s-1

Rej from 1.75×104 to 7.00×104)

the introduction of gas bubbling strengthened the liquid mixing conditions. With the increase of superficial gas velocity

the liquid mixing time decreased at first and then increased. When the gas or liquid power input kept constant

the mixing time decreased with the increase of the total power input. Through the regression analysis of all the experimental data

relationship between liquid mixing time

and liquid and gas power inputs had been built up. An empirical correlation was proposed

and the calculated value was fitted well with the experimental data. Based on the obtained equation

the liquid mixing time was found to decrease at first and then increase with the increase of the gas power input if the total power input was remained constant. The transition point was around where gas input power occupied 61% of the total input power. At this point

the synergistic effect was the strongest.