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1)  downcomer backup
降液管清液层高度
2)  liquid backup
降液管内液层高度
3)  Clear liquid height
清液层高度
1.
Measurement and calculation of clear liquid height on the small-perforated sieve tray;
小孔筛板上清液层高度的测量与计算
2.
The clear liquid height, gradient of liquid level and velocity distribution of liquid phase on CTST were measured and studied theoretically in the experimental column with inside diameter of 1000mm.
本文在φ1000mm的冷膜塔内对立体传质塔板CTST的板上清液层高度、液面梯度和板上液相速度分布进行了实验测量和理论研究。
3.
The clear liquid height on CTST was measured by the improved communicating pipe.
应用改进的连通法对立体传质塔板CTST的板上清液层高度进行了测量,结果表明:立体传质塔板的板上清液层高度是不均匀的;其板上清液层高度随溢流强度和堰高的增加而增加,随板孔气速的增大先降低后又有所回升。
4)  downcomer backup
降液管液柱高度
5)  downcomer liquid
降液管液层
1.
The results showed that the rise-up vapor entered continuously the downcomer in form of gas column when the vapor flow in the column increased gradually,until the downcomer liquid was broken through and the downcomer was not operated normally.
结果表明,当塔内的气体流量逐渐增大,漏入的气体以气柱的形式连续进入降液管时,降液管液层被击穿,降液管无法正常操作。
6)  height of liquid Layer
液层高度
补充资料:降液管清液层高度
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性质:又称降液管清液层高度。板式塔降液管内的液柱液面到下层塔板的垂直距离。如图中的Hd(图暂缺)。为保持板式塔正常操作,避免发生液泛,降液管液柱高度不能超过一定限度。一般应满足Hd≤(0.4~0.6)(HT+hw),式中HT为塔板间距,hw为堰高,系数一般取0.5,易起泡物系取0.4,不易起泡物系取0.6。

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