穿流栅板塔冷模实验  

Cold mold experiment for turbogrid tray tower

作　　者：赵文凯[1] 匡国柱[1] 于士君[2] 

机构地区：[1]大连理工大学化工学院,辽宁大连116012 [2]沈阳工业大学石油化工学院,辽宁辽阳111003

出　　处：《沈阳工业大学学报》2008年第3期356-360,共5页Journal of Shenyang University of Technology

摘　　要：为解决穿流式栅板塔操作时气液两相的接触状态、流体力学和传质特点缺乏实验依据的状况,从而更准确地选取穿流栅板塔设计中的重要参数,在φ150的试验塔内,以空气水为系统,通过冷模实验分别对采用堵缝法确定的开孔率为11%、13%和15%的穿流塔板进行研究.考察了其气体流量、喷淋密度对板压降的影响以及气含率与气体流量的关系,验证了板上气液接触状态的演变过程,得出了塔板的负荷性能图,导出了计算起泡点和液泛点气速的经验公式,并对热模操作做出推测.结果表明,穿流栅板塔的气液接触状态可分为润湿区、鼓泡区和液泛区;起泡点和液泛点气速的计算可采用本文导出的经验公式;气含率随气流量的增大而增大;可采用堵缝法降低塔板的开孔率,使气体动能增大而进入良好的操作区,从而提高塔效率.In order to resolve the problems lack of experimental data in gas-liquid contact status, hydrodynamics and mass transfer feature during the operation of turbogrid tray tower and to select more accurately the crucial parameters in the design of turbogrid tray tower, the hydrodynamics performances of the turbogrid tray tower with free area of 11%, 13% and 15% were investigated through cold mold experiment in a φ150 testing tower, with taking the air-water system as an example. The influence of the gas flux and liquid raining density on the tray pressure drop as well as the relationship between gas content and gas flux were determined. The evolvement of the gas-liquid contact status on the tray was verified. The load performance schematics of the tray were therefore obtained. The empirical equation for calculating the gas speed of the frothy and flood points was derived, and the hot mold operation was estimated. The results indicate that the gas-liquid contact area of the turbogrid tray tower can be divided into wetting area, bubble area and flood area. The derived empirical equation can be applied to calculate the gas speed of the frothy and flood points. The gas content increases with the gas flux. The free area of the tray can be decreased by plugging method, which can enhance the kinetic energy of gas and let gas enter a good operating area, and thus improve the efficiency of the turbogrid tray tower.

关 键 词：穿流栅板塔 冷模实验 流体力学 板压降 效率 性能 

分 类 号：TB35[一般工业技术—材料科学与工程]