bubble-cap plate

bubble-cap plate

[′bəb·əl ‚kap ‚plāt]
(chemical engineering)
One of the devices in large-diameter fractional distillation columns that are designed to produce a bubbling action to exchange the vapor bubbles flowing up the column.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.