悬挂式降液管液流孔气液流动状态研究  

Study on vapor-liquid flow states of hanging downcomer bottom-orifices

作　　者：李育敏[1] 俞晓梅[1] 

机构地区：[1]浙江工业大学化学工程与材料学院,浙江杭州310032

出　　处：《化学工程》2006年第10期24-26,62,共4页Chemical Engineering(China)

摘　　要：悬挂式降液管液流孔存在3种气液流动状态:只有液体流过液流孔(称走液态),只有气体流过液流孔(称走气态),气液二相都不流动(称气液堵塞态)。实验在长300 mm和宽200 mm的有机玻璃塔中进行,物系是空气-水。使用多路电导仪测试,在每个测试点都巧妙地布置3个电导探针,3种气液流动状态都被测出。结果表明,气液堵塞态确实存在,其面积分率是走气态面积分率的0.4—1.8倍。因此,悬挂式降液管液自封标准既应限制漏气量,还应限制气液堵塞。At hanging downcomer bottom-orifices, there exist three fluid flow states： only liquid flowing downwards through orifices （ called ＂descending＂ ） ; only vapor flowing upwards through orifices （ called ＂bubbling＂ ） ; neither of vapor-liquid phases flowing through orifices （called ＂ bridging＂）. The experiment was carried out in a 300 mm ~ 200 mm simulator of organic glass in air-water system. Using a multi-path conductometer, the three types of fluid flow states were successfully measured with ingenious layout of conductometric probes. The results indicate that the bridging exists really, its area fraction is 0.4-1.8 times bubbling area fraction. Hence, not only bubbling but also bridging shall be restricted for the seal criterion of hanging downcomer.

关 键 词：悬挂式降液管 液流孔 气液堵塞 多路电导仪 

分 类 号：TQ053.5[化学工程]