Collectors/Chimney Trays

Liquid collection between packed beds and trays is frequently required. Liquid collectors are used in three main applications:

• For total draw-off of liquid as a product, to provide the feed to a reboiler, or for pump-around sections
• Partial draw-off of liquid with overflow of the remaining liquid continuing down the tower
• Collection of liquid for mixing

Collector trays come in different design styles to meet the needs of specific applications. Factors considered in the design of collector trays include:

• Height required/available for the collector tray
• Column pressure (Vacuum) and permissible pressure drop (to determine the required open area)
• Liquid and vapor loads and densities
• Column diameter
• Liquid draw-off quantity
• Residence time