Patent ID: 7506861
Filing Date: 2009-03-24
Classification: B01D,B01J

Abstract:
1. A method for evenly distributing a downward flow of liquid and vapor across the cross sectional area of a two-phase concurrent downflow vessel below a substantially horizontal liquid collecting tray, the method comprising the steps of: collecting liquid in a liquid pool on said tray; collecting vapor in a vapor space above said liquid pool; providing a plurality of distribution units for conducting said vapor and said liquid downward through said tray, each of said distribution units comprising a downcomer, a liquid conduit and a vapor/liquid mixing zone; passing the majority of said vapor through said vapor inlets, through said downcomers and to said vapor/liquid mixing zones; passing substantially all said liquid from said liquid pool through said one or more openings to said vapor/liquid mixing zones via said liquid conduits; passing said vapor and said liquid from said vapor/liquid mixing zone to the space below said tray; and reducing the difference between the pressure of the vapor immediately above a surface of said liquid at a point adjacent said wall and upstream from one of said one or more openings, and the pressure of the vapor downstream from said one of said openings at the same level as said surface.