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    • 3. 发明授权
    • Process and devices for operation of an apparatus which functions by
using a flow of a liquid film
    • 用于通过使用液膜流动而起作用的装置的操作的方法和装置
    • US4874559A
    • 1989-10-17
    • US298896
    • 1989-01-19
    • Pierre Brun
    • Pierre Brun
    • B01D1/06C01G25/04C01G27/04
    • B01D1/065C01G25/04C01G27/04
    • The invention concerns a process and an apparatus for maintaining a very thin film in an exchanger involving a flowing liquid film. The process wherein the liquid films are fed by gravity from a liquid source is characterised in that: each film is fed at the permanent flow (kd.sub.1) corresponding to the feed flow rate (d.sub.1) of the source; then for a short period of time the flow rate is increased to a transient value (kd.sub.2) for establishing a continuous film over the whole of the corresponding flow surface; then operation returns to the flow rate (kd.sub.1) for the film in question, the short periods of feeding the different films at their transient flow rates (kd.sub.2) being displaced in respect of time. The apparatus according to the invention comprises at the top of each flow tube a movable sleeve, lifting movement or rotary movement of which opens a supplementary communication between the liquid source and the tube, permitting the film flow rate to assume the transient value (kd.sub.2). The process is applied in particular to the process for separation of tetrachlorides of Zr and Hf.
    • 本发明涉及一种用于在涉及流动液体膜的交换器中保持非常薄的薄膜的方法和装置。 其中液体膜通过重力从液体源进料的过程的特征在于:每个膜以对应于源的进料流速(d1)的永久流(kd1)进料; 然后在短时间内将流量增加到用于在整个相应流动表面上建立连续膜的瞬时值(kd2); 那么操作返回到所讨论的膜的流速(kd1),在瞬时流速(kd2)相对于时间被移位的不同膜的短时间段。 根据本发明的装置包括在每个流管的顶部,可移动套管,提升运动或其旋转运动打开液体源和管之间的补充连通,允许膜流速呈现瞬态值(kd2) 。 该方法特别适用于分离Zr和Hf四氯化物的方法。