Abstract：Three-dimensional fluidized bed indifference device with inner diameter of 90 mm was adopted to investigate the effect of the combined porous sieve plates and single-rotation guide baffles on gas-solid two-phase flow. Under the operating conditions of superficial gas velocity ("U" _"g" ) ranging from 0.04 to 1.14 m/s and initial loading height (H) of 650 mm, the scope of the rotating sieve tray type gas-solid baffle effectively suppressing and breaking bubbles was established by analyzing characteristics of gas-solid two-phase flow in free fluidized bed and comparing and analyzing standard deviation of pressure fluctuation and standard deviation of pressure difference pulsation in free fluidized bed, single-rotary sieve tray type gas-solid baffle fluidized bed and dual-rotation sieve tray type gas-solid baffle fluidized bed. The results showed that the scope of rotating sieve tray type gas-solid baffle effectively suppressing and breaking bubbles was 0.04≤"U" _"g" ≤0.57 m/s, and at this time, the gas-solid two-phases in the corresponding free fluidized bed were in bubbling-slugging transitional fluidization. The scope of axial space was the area below the rotating sieve tray type gas-solid baffle and the area containing rotating sieve tray type gas-solid baffle. Increasing the number of rotating sieve tray type gas-solid baffle helped to strengthen the effect of breaking bubbles and to broaden its axial spatial extents, but it did not broaden the gas velocity range of broken bubbles.
Liang Kaiguang,Zhao Bin,Wang Dewu et al. The Scope of the Rotating Sieve Tray Type Gas-Solid Baffle to Break Bubbles[J]. 化学反应工程与工艺, 2018, 34(3): 193-201.
