新型立体传质塔板及其流体力学性能  

Combined trapezoid spray tray and its hydromechanics

作　　者：刘继东[1] 吕建华[1] 张竞平 李春利[1] 

机构地区：[1]河北工业大学化工学院,天津300130 [2]天津普莱特科技发展有限公司,天津300384

出　　处：《化工学报》2005年第6期1144-1149,共6页CIESC Journal

基　　金：国家科技攻关计划项目(2001BA901AB).~~

摘　　要：新型立体传质塔板(CTST)结构新颖,充分利用塔板空间进行传质,具有通量大、效率高、压降低、抗堵性能强、消泡性能好等优点.在工业规模的实验塔上对立体传质塔板的塔板压降、帽罩底隙处罩内外压强、帽罩内部气相速度分布规律、雾沫夹带量、气体对液体的提升能力、塔板空间持液量等几个方面的流体力学性能进行了研究.结果表明,立体传质塔板克服了穿过塔板液层的阻力,板压降较低;塔板上帽罩底部的进液口处,罩内压强低于罩外,利于吸液;罩内气相速度分布比较合理;气液两相负荷均可较大幅度提高,而且雾沫夹带量非常低;气体对液体的提升性能以及塔板空间的持液性能都比较理想.Combined trapezoid spray tray (CTST) is one of spray trays with special trapezoid structure. The plate has some advantages such as higher flux and efficiency, lower pressure drop, better blockage and foaming resistance. The hydromechanics of CTST was studied. The pressure in the cap was lower than that out of the cap in the zone of cap gap. Therefore CTST is favorable for liquid coming into the cap from the plate. Gas velocity distribution in the cap was studied, and there were two small eddy zones at the bottom of the cap. On the upside in the cap, gas velocity was high owing to the decrease of cross section area, which provided liquid with enough energy to be broken up and sprayed out of the cap. With the cap, gas (or vapor) was capable to lift liquid from the plate up to the space between plates where was the main space of mass transfer. Little liquid was stagnant when passing through the cap, which made liquid holdup small.

关 键 词：立体传质塔板 帽罩 流体力学 气速分布 

分 类 号：TQ053.3[化学工程]