新型多降液管塔板的流体力学性能及其流场CFD模拟  

Hydrodynamic performances of a novel multiple downcomer tray and related CFD analysis

作　　者：尹洪贺 沈绍传[1] 齐亮[1] 姚克俭[1] YIN Honghe;SHEN Shaochuan;QI Liang;YAO Kejian(College of Chemical Engineering,Zhejiang University of Technology,Hangzhou 310032,Zhejiang,China)

机构地区：[1]浙江工业大学化学工程学院,浙江杭州310032

出　　处：《化工进展》2022年第2期601-608,共8页Chemical Industry and Engineering Progress

基　　金：中国石油化工股份有限公司研究项目(418024-3)。

摘　　要：开发了一种流场均匀且液相处理能力大的新型多降液管塔板。本文以水和空气为介质,在内径1219mm的有机玻璃塔内,研究了新型多降液管塔板的流体力学性能。结果表明,在相同气液负荷下,相较于弓形降液管塔板,新型多降液管塔板具有湿板压降低、雾沫夹带量小和漏液少等优点。同时新型多降液管塔板继承了多降液管(MD)塔板液相负荷高的特点,在空塔动能因子2.4(m/s)·(kg/m^(3))^(0.5)的条件下,全塔喷淋密度仍可高达80m^(3)/(m^(2)·h)。对塔板上液相流场的流体流动特性进行了计算流体力学(CFD)分析,并将模拟结果与MD塔板进行对比。结果表明,新型多降液管塔板降液管的结构和排布方式使得塔板上液体流动更加均匀,预期可以获得更高的塔板效率。A novel multiple downcomer tray with uniform flow field and large liquid phase processing capacity was developed.The hydrodynamic performances of the novel tray were experimentally investigated with an air-water system in a plexiglass column with an inner diameter of 1219mm.The results showed that under the same gas-liquid load,compared with the segmental downcomer tray,the novel tray had the advantages of lower wet plate pressure,smaller entrainment and less weeping.At the same time,the novel tray had the merits of large liquid phase capacity of multi-downcomer(MD)tray,the highest spray density reached 80m^(3)/(m^(2)·h)under the condition of an empty tower kinetic energy factor of 2.4(m/s)·(kg/m^(3))^(0.5).The characterizations of the on-tray liquid phase flow field were analyzed via computational fluid dynamic(CFD)simulation,and the results were compared with those of the conventional MD tray.It was inferred that the downcomer structure and arrangement of the novel tray led to the uniform liquid flow field and a higher tray efficiency was expected.

关 键 词：多降液管塔板 流场均匀性 流体力学性能 CFD模拟 

分 类 号：TQ053.5[化学工程]