Distillation tower feed device

摘要

A feed device for a distillation tower has an annular, open-bottomed channel located around the periphery of the feed zone of the tower with an inner wall spaced from the inner curved wall of the tower and a top covering the channel to confer a generally inverted-U shape to the cross section of the channel. One or more tangential feed inlets are provided to admit a heated, mixed phase feed to the tower and direct the feed into and along the channel. One or more vapor scoops are provided for each feed inlet with the scoop(s) located on the inner wall of the channel at a sufficient distance along the channel from the inlet to permit cyclonic separation of vapor and liquid before the vapor in the feed from the inlet enters the scoop(s) and passes through a vapor exit port into the central core of the tower.

主权项

1. A feed device for a distillation tower which comprises:
an open bottom channel located around the periphery of a feed zone and a hollow central core of the of the tower, the channel having a curved inner wall spaced from an inner curved wall of the tower and a top covering the channel; at least one tangential feed inlet to admit heated, mixed phase feed to direct the feed into and along the channel; at least one vapor scoop for each feed inlet located on the inner wall of the channel, each at a sufficient distance along the channel from the inlet to permit cyclonic separation of vapor and liquid to take place before the vapor in the feed from the inlet enters the scoop, the scoop having a vapor exit port in the inner wall of the channel to permit vapor to pass into the central core of the tower, said vapor exit port having a proximal edge and a distal edge relative to the direction of flow of the feed; wherein the scoop further comprises a substantially vertical leading edge facing the direction of flow of feed from the tangential feed inlet, said leading edge being spaced a distance between the inner wall of the channel and inner wall of the tower; wherein from the leading edge, the scoop extends substantially parallel to the inner wall of the channel and inner wall of the tower for a distance before curving to meet the distal edge of the vapor exit port.