用热水示踪技术对DJ+塔板液流分布的研究.pdfVIP

C022 用热水示踪技术对DJ 塔板液流分布的研究 姬登祥 俞晓梅 李育敏 王良华 (浙江工业大学化学工程设计研究所，杭州，310014) 摘 要 以空气-水为物系，采用热水示踪技术和微机温度测量系统测试了设置有防冲击漏液 装置和导流板的新型DJ 塔板上液体的等平均停留时间分布，研究了防冲击漏液装置与导流板 的作用，通过测试导流板方位、液量和气量等因素对等平均停留时间分布的影响，探索了塔 板上的液流分布特点。实验结果表明：防冲击漏液装置不仅可以减少漏液和提高塔效，穿过 斜孔的气体还推动部分液体流向塔板；导流板对液体有诱导作用，可改善液体的流动，在实 验范围内，导流板存在对流动改善较佳的位置；液量增大时，液体流动略趋均匀；气量增大 时，流动明显均匀些；当液量和气量同时增大时，液体的平均停留时间缩短，流动趋于均匀， 等平均停留时间分布趋于与出口堰平行。 关键词 热水示踪技术 微机温度测量系统 DJ 塔板 等平均停留时间分布 液流分布 STUDY ON THE LIUID DISTRIBUTIONS OF DJ TRAY WITH HOT-WATER TRACING TECHNOLOGY JI Dengxiang ，YU Xiaomei ，LI Yumin and WANG Lianghua (Chemical Engineering Design Research Center，Zhejiang University of Technology ，Hangzhou ，310014) Abstract It has long been recognized that the liquid distributions effect the contacting conditions between gas and liquid. The liquid equal mean residence time distributions(EMRTD) of a newly DJ tray with anti-dumping units and directed-plates using air-water system, hot-water tracing technology and computerized multipass thermometer were adopted. The roles of anti-dumping units and directed-plates were studied, the characteristics of liquid distributions were sought by measuring the effects which the locations of directed-plates and the rates of gas and liquid had on the equal mean residence time distributions(EMRTD). The results showed that the anti-dumping units can not only decrease dumping and improve column efficiency, but also the gas perforating the inclined perforations can impel the liquid to the tray. The directed-plates have a guiding for the liquid, they improve the liquid distributions. In the range of experiment, there were more excellent location where the liquid equal mean residence time distributions (EMRTD)were nearly parallel to the