Patent ID: 8158073

Claim:
A mass exchange contact device comprising: an upper tray; a contact element coupled to the upper tray; a lower tray disposed substantially in a parallel plane below the upper tray; a cylindrical casing including a plurality of vertically extended windows circumferentially disposed on the vertical walls of the casing and a plurality of circular orifices circumferentially disposed on the walls of the casing above the windows; a movable double-acting valve composed of two solid plates disposed one above the other and fixedly attached to a distance rod situated at the central axe of the valve; and a cover bushing disposed coaxially around the casing in the upper region thereof; wherein: said contact element restricts the upward movement of said valve, whereas the bottom edge of said casing restricts the downward movement of said valve, the bottom edges of the windows are disposed at the level of said lower tray, and the exterior of said contact element is communicated with the interior of said casing via the inner space of said bushing and via the orifices.