Abstract: The present invention relates to equipment designed for carrying out heat- and mass transfer processes between gas or vapor and liquid and deals with centrifugal-whirling contact trays installed in rectification, absorption, washing and contact vertical columns in which liquid moves in a downward direction and contacts gas or vapor rising upwards along the column, the liquid phase containing the solid phase or polymerization products.

Abstract: A column for heat- and mass exchange between gas or steam and liquid comprises contact plates mounted in a casing in a superposed relation to one another, the plates being divided into sections which comprise individual portions of the contact plate raised above the remaining surface thereof. Apertures are made in the sections for the passage of gas and are provided with arched apron plates extending within each section tangentially to the center thereof and in the same direction in such a manner that rotary motion of two-phase gas and liquid flows in the adjacent sections occurs in opposite directions. The sections are arranged in plan in such a manner that their centers are located substantially over an intersection space of lower contact plates.