Abstract：In order to realize the continuous production of 1,3-malondiamine series fine chemical products, a kind of internal loop air-lift slurry reactor was designed. The experimental results showed that when the superficial gas velocity increased from 0.007 to 0.028 m/s, the gas hold-up increased linearly under four solid hold-up conditions. The increase of solid phase concentration decreased gas hold-up of riser, while increased gas velocity of regime transition under the same operating conditions. Pressure had little influence on gas hold-up and gas velocity of regime transition. The variation of bubble characteristics caused by pressure was the main reason for the difference. Three-Euler method and RNG k-ε turbulence model were used to establish the numerical model of the circulating slurry reactor. The model fitted the measured data well with a maximum gas hold-up deviation 8.9%, gas velocity of regime transition deviation 5.0%. The simulation results showed that in the range of 0.007-0.028 m/s, increasing solid hold-up would decrease the liquid circulating velocity in the same operating conditions, while pressure had little influence on it.
BO Ziyi,XIA Liangzhi,WANG Haonan et al. Experiment and Numerical Simulation on Flow Characteristic of Internal Loop Air-Lift Slurry Reactor[J]. 化学反应工程与工艺, 2020, 36(2): 136-146.
