| 摘要 |
<p>889,624. Contacting a gas with a liquid. GLITSCH & SONS Inc., FRITZ, W. Feb. 27, 1959 [Sept. 8, 1958], No. 6878/59. Class 55 (2). [Also in Group XXIX] Apparatus for contacting a vapour with a liquid comprises a column containing a liquid supporting tray having orifices for the upward flow of vapour, each orifice having a closure adapted to be lifted by a predetermined pressure differential above and below the tray and provided with means to control the movement of the closure in at least two stages, whereby the closure is lifted initially to provide a uniform flow passage permitting a minimum and maximum rate of initial flow of vapour through the orifice and on a predetermined increase in the pressure differential above and below the tray, is further lifted to provide a larger minimum and maximum rate of subsequent flow of vapour through the orifice, each closure being seated on the tray over an orifice and being moved when lifted completely out of engagement with the tray. As shown in Fig. 5 a tray 11 has an orifice 17 with a closure consisting of a domed plate 19 which can seal the orifice, domed plates 20 and 21 supported above the plate 19 on legs 32 and 33 respectively and a cover plate 22 supported and secured by studs 40 (one only shown) at a height above the tray corresponding to a predetermined maximum opening of the closure. In operation pressure of upwardly flowing vapour first lifts the plate 19 until it contacts the plate 20, and on increasing flow of vapour the plates 19 and 20 are lifted up to the plate 21 and finally all the plates are lifted up to the cover plate 22. The orifice 17 preferably has a seat forming member 25 as shown. The undersurface of the plate 22 has downwardly extending tongues 45 and the undersurfaces of the plates 20 and 21 have protuberances to prevent adherence of the plates when wetted by the liquid on the tray. The cover plate 22 may have a skirt extending downwardly to the surface of the tray, the skirt being provided with passages 69 for the flow of vapour as shown in Fig. 14. The weights of the liftable plates may be varied in each closure and from closure to closure.</p> |
