小直径管道气液逆流的流体力学  

Hydrodynamic behavior of small diameter tube in gas-liquid countercurrent process

作　　者：尚会建[1] 张高[1] 赵丹[1] 周艳丽[1] 张少红[1] 赵彦[1] 郑学明[1] 

机构地区：[1]河北科技大学化学与制药工程学院,河北石家庄050000

出　　处：《化学工程》2014年第2期45-49,共5页Chemical Engineering(China)

摘　　要：文章提出了一种新反应器形式——小通道逆流反应器,考察了模型中单管道的进出口和管长对流体力学性能的影响。设计了管道的不同进出口结构,对比研究其液泛特性。结果显示:小直径管道的进出口结构对液泛特性有明显的影响,增加管子的进出口结构使液泛气速得到极大的提高。I管的进出口形式最圆滑,可以有效避免气、液在进出口处发生冲突。其液泛气速最高可达7.6 m/s,远远高于平切口管道内的操作气速,说明进出口越圆滑液泛气速越大。使用圆滑进出口的管道,考察了管长对液泛特性的影响。发现长度增大后,管道的液泛气速相差不大,但压降有所增大。小直径管子的压降很小(100 Pa/m左右),且变化平稳。A new-style reactor-smafl channel gas-liquid countercurrent reactor was proposed. The influence of inlet- outlet structure and length of single pipe on hydrodynamics and mass transfer was studied in the state of gas and liquid countercurrent. Several kinds of inlet and outlet structure of tube were designed to research flooding characteristics. The results indicate that the inlet and outlet of pipe have obvious influence. The inlet and outlet structures of tube lead to flooding gas velocity increase. Pipe I has the slipperiest inlet and outlet, in which the conflict of gas and liquid can be efficiently avoided. The highest flooding velocity can approach 7.6 m/s, which is much higher than the operation velocity of flat incision pipe. The more sleek inlet and outlet are, the bigger flooding velocity can be maintained. In slippery inlet-outlet pipes, the influence of diameter and length of tube on flooding property and circumfluence mass transfer efficiency were studied. The pressure drop of small tube is very small （ about 100 Pa/m） and it changes smoothly.

关 键 词：小直径管道 气液逆流反应器 流体力学 液泛 

分 类 号：TQ021.1[化学工程]