折流式旋转床——超重力场中的湿壁群

Wetted wall cluster in high gravity field: Zigzag rotating bed

研制了一种转子由动、静折流圈构成的折流式超重力场旋转床,气、液两相在动静折流圈的缝隙之间逆向运动时接触传质。与常用填料式旋转床相比,折流式旋转床有2个优点:①可以方便地实现连续精馏操作中的中间进料;②多个转子可方便地安装在同一个转轴上,而在转子之间不必有动密封,大大提高了单台设备的分离能力。对分离工业生产的乙醇-水和甲醇-水的连续精馏试验表明,其分离能力按转子的有效径向距离计算每米理论塔板数可达20块。

Zigzag rotating bed (ZRB) in high gravity field is developed, which is composed of immobile up-disc, rotational down-disc and circular baffle-boards fitted vertically between the up-disc and down-disc in a staggered form at a certain radial distance. In the rotor, gas and liquid flow countercurrently in the gap between the up-disc and down-disc and contact violently. Compared with the packed rotating bed (PRB), ZRB has two advantages: (1) the middle-feed in continuous distillation can be easily realized; (2) multi-rotors can be easily installed in rotating axes without moving seal between rotors, hence the separation capability of a single ZRB is increased greatly. Distillation tests in continuous distillation process in industry for separating ethanol-water and methanol-water system indicate that ZRB has 20 of theoretical plates per meter in the radial direction of the rotors.