折流式旋转床静圈对其性能的影响  

Effect of stationary baffle on the performance of rotating zigzag bed

作　　者：周振江[1] 王广全[1] 郭成峰[1] 计建炳[1] 

机构地区：[1]浙江工业大学化学工程与材料学院,浙江杭州310014

出　　处：《化工进展》2014年第1期25-29,共5页Chemical Industry and Engineering Progress

摘　　要：折流式旋转床是一种新型的超重力旋转床,其核心部件是动、静结合的转子,转子由安装了动圈的动盘和安装了静圈的静盘上下相互嵌套而成。本实验中使用了一个常规的折流式转子（转子Ⅰ）和一个具有较短静圈的折流式转子（转子Ⅱ）,在常压下分别以乙醇-水体系和空气-水体系对两个折流式转子进行了传质性能与流体力学实验,考察了静圈对折流式旋转床的传质、压降和功耗的影响。结果表明,静圈能明显强化传质过程,与转子Ⅰ相比,转子Ⅱ理论塔板数大约降低了的50%;转子Ⅰ的传质效率随转速的增大而增大,当转子的转速从400 r/min增加到1200 r/min,转子Ⅰ的传质效率增大了约40%,而转子Ⅱ的理论塔板数变化不明显;静圈使折流式转子具有较大的压降和功耗,转子Ⅱ的压降为转子Ⅰ的20%~50%,轴功率为转子Ⅰ的60%~80%。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.

关 键 词：折流式旋转床 静圈 传质 压降 功耗 

分 类 号：TQ021.4[化学工程]