As with calculating collection efficiency, no single equation can predict pressure drop for all scrubbing systems.
Many theoretical and empirical relationships are available for estimating the pressure drop across a scrubber. Generally, the most accurate are those developed by scrubber manufacturers for their particular scrubbing systems. Because of the lack of validated models, users should consult the vendor’s literature to estimate pressure drop for the particular scrubbing device of concern.
One widely accepted expression was developed for Venturis. The correlation proposed by
Calvert (Yung et al., 1977) is: