The liquid is injected in several planes through cylin-
drical nozzles in the throat of the venturi which are
located perpendicular to the gas stream. The throat of
the venturi was rectangular in order to achieve; a uni-
form distribution of the washing liquid over all the
cross-section. Contrary to the usual design where the
washing liquid is injected by a pump, the venturi scrub-
ber in Fig. 2 worked in a self-priming mode.