Liquid Collectors


Liquid Collectors
Liquid collection from between packed beds is frequently required. Liquid collectors are used in two main situations: liquid collection for “Intermediate liquid draw-off” or “Mixing”.
An intermediate liquid draw-off may be either a partial draw or a total draw. With a partial draw, only a fraction of the liquid in the column is withdrawn while the remainder flows down the tower as internal reflux. With a total draw, all of the liquid is withdrawn.

Intermediate liquid draw-offs are normally made with a deck-style or a vane-style collector. A deck-style collector is the most common means for withdrawing liquid from a packed tower. A vane-style collector consists of a number of inclined vanes. Liquid is collected in a channel at the bottom of each vane and drained into an annular sump at the tower wall.

Model DLC-833

Deck-Type Liquid Collector

The Model DLC-833 is used in towers of all sizes and suitable to feed a liquid distributor or trayed section below. Riser height varies with liquid rates and draw-off conditions. Sumps can be added on one side, both sides or across the center. This collector has 25 to 40% open area depending on the needs of the application.

Construction Features :
The deck and optional sump(s) rest on tower support ring. Standard design is for field seal welding. As an option, bolt and gasket joint construction is available.

Model CLC-633

Chevron-Type Liquid Collector

The Model CLC-633 is used in towers that are greater than 800 mm ID and that process high vapor loads and low liquid loads (typically, vacuum service). The collector has approximately 50% open area in small towers and up to 80% in larger towers. In applications where liquid is directly fed to a distributor below, a downpipe is required to properly feed the distributor below.

Construction Features :
Only the chevron vanes are supplied because the annular sump is seal welded to the tower and is supplied by others. For larger towers and high liquid rates, collection trough(s) are added, spanning across the annular sump.