关键词: 折流式旋转床, 静圈, 传质, 压降, 功耗

Abstract: Rotating zigzag bed (RZB) is a new kind of contactor using HIGEE technology and is characterized by a rotor consisting of a stationary disc fixed with stationary baffles and a rotating disc fixed with rotating baffles. A conventional rotor (RotorⅠ) and a rotor equipped with shorter stationary baffle (RotorⅡ) of RZB were used in the experiments，and the mass transfer performance and hydraulics of the proposed device were studied using ethanol-water and air-water systems at atmospheric pressure. The effects of stationary baffle on the mass transfer，pressure drop，and power consumption in the RZB were investigated. The experimental results indicated that stationary baffle can significantly intensify the mass transfer process，and the theoretical plate number of Rotor Ⅱ was about 50% lower in comparison with RotorⅠ. The mass transfer efficiency of RotorⅠ increased as rotational speed increased，and it was enhanced by 40% when rotational speed increased from 400 r/min to 1200 r/min. The mass transfer efficiency of RotorⅡ was not significantly affected by increasing rotational speed. Stationary baffle made the rotor of RZB have a higher pressure drop，and power consumption. The pressure drop and shaft power in RotorⅡ was 20%—50%，60%—80% that of RotorⅠ，respectively.

Key words: rotating zigzag bed, stationary baffle, mass transfer, pressure drop, power consumption