下喷式环流反应器环隙气含率影响因素

下喷式环流反应器是一种用于强化气-液两相反应过程的新型装置,虽然已在工业上有了较广泛的应用,但对其理论研究远未成熟,其工业装置的设计仍依赖于实验和经验。本文借助实验室自制实验装置,对下喷式环流反应器环隙气含率的影响规律进行了研究。首先,对喷射器的吸气量进行了测量,获得了不同条件下喷射器最大吸气量的性能曲线;在此基础上,分别研究了气相流量、液相流量以及喷射器安装位置对环隙气含率的影响规律。结果表明：气相流量和液相流量对气含率具有重要的影响,随着气相流量和液相流量的增大,气含率快速提高,而喷嘴位置对气含率的影响相对较小;考虑到增加气相流量和液相流量所需要的能耗和设备代价,通过增加液相流量来达到提高气含率的目的是优选方案。

Study on effects of annular gas holdup in reversed flow jet loop reactor

Reversed flow jet loop reactor is a new equipment for strengthening the gas-liquid two-phase reaction process. Although it has been widely used in the industry, its theoretical research is far from mature, and the design of its industrial device still depends on experiment and experience. In this paper, the influential law of annular gas holdup in reversed flow jet loop reactor was studied by a self-made experimental equipment. First, inspiratory volume of ejector was measured, and the performance curve of the maximum inspiratory volume of ejector was obtained under different conditions. On this basis, the influence of gas flow rate, liquid flow rate, and ejector installation position on annular gas holdup was studied. Results show that gas flow rate and liquid flow rate had significant effect on gas holdup. Gas holdup was rapidly enhanced with the increasing of gas flow rate and liquid flow rate. While the influence of nozzle position on the gas holdup was relatively small. Considering the energy consumption and equipment cost of increasing gas phase flow and liquid flow rate, the preferred scheme is achieved by increasing the liquid flow rate.