Vertical Packed Bed Fume Scrubber

This is a counter-flow design that has contaminated gas flowing upwards and recirculated liquid
spraying downwards through the packing media. Vertical scrubbers typically have a smaller footprint
and can have greater removal efficiency than Horizontal Packed Bed Scrubbers. Multiple scrubbing
stages with different scrubbing solutions can be achieved by having more than one scrubbing tower
in series. Multiple towers provide the highest removal efficiency, as well as multiple gas constituent
removal.

Horizontal Packed Bed Fume Scrubber

This is a cross-flow design that has recirculated scrubbing liquid flowing vertically
downwards while the gas passes horizontally through the packing section. This
design is more tolerant of solid particulate that may be contained in the air stream.

A Horizontal Packed Bed Scrubber is appropriate when limited headroom is an issue,
and it also allows for multiple stages in one housing with separate sumps and
scrubbing solution pumps if required.