静态导流板式旋转填料床的结构设计及其传质效果研究

在以增大端效应区为手段的旋转填料床(RPB)基础上设计了一种新型结构的RPB,即静态导流板式RPB,通过在主体填料区设置静态导流板,使周向运动的液体重新获取径向上的速度分量,液体重新被切割,产生第二端效应区,从而使气液传质效果得到加强。在脱碳实验中,对比静态导流板4种不同安装方式下的传质效果,结果表明,当导流板弧面切线方向与外填料垂直时,传质效果最好;CO2-Na OH气液传质实验的结果表明,安装静态导流板时设备的脱碳率比传统的满填料转子高5%左右,比未安装导流板时高10%左右;在H2S-CO2-MDEA的竞争反应体系中,H2S的脱除效率较高,选择因子较大,脱硫效率大于99.8%,净化气中H2S体积分数低于0.002%,同时选择性因子高达13.5。

Structure design and mass transfer for a new rotating packed bed with static blades

In order to magnify the end effect zone, some pioneers have previously invented new types of rotating packed beds (RPBs). Based on this earlier work, we have developed a RPB with a new structure containing static blades. The static blades are installed in the subject zone and can change the liquid flow direction from circumferential to radial in the subject zone. Because of this, the second end effect zone grows and the mass transfer performance of the equipment is enhanced. Using decarburization as a probe, comparison of four different ways of installing the static blades shows that mass transfer is most efficient when the tangent of the cambered surface is perpendicular to the outer packing zone. Compared with traditional RPB, the rate of decarburization of the equipment shows a 5% increase in the CO2-NaOH mass transfer experiment and a 10% increase compared with the system with the static blades removed. The removal efficiency of H2S and the selectivity factor also improve in the competitive reaction involving H2S, CO2 and MDEA. The desulfurization efficiency is more than 99.8%, the concentration of H2S in the purified gas is lower than 0.002%, and the selectivity factor is greater than 13.5.