the level of the constituents to be collected in the clean gas after wet cleaning and in the crude gas prior to wet cleaning.
In venturi scrubbers with conventional nozzling, the collection efficiency depends on the extent to which the drops of the scrubbing liquid are atomized in the venturi throat and are turbulated with the crude gas, so that as many dust particles as possible impinge on the liquid surfaces and are collected. The shear forces and the degree of turbulation of the crude-gas/liquid mixture in the venturi throat decreases with increasing size of the venturi throat. The size of the venturi throat and the velocity of the crude gas stream define the venturi pressure drop of the crude gas stream. The pressure drop increases as the venturipreferably up to 20 mbar, through one or more venturi throats. A hybrid nozzle is known per se from DE 43 15 385.
A hybrid nozzle is constantly supplied with a scrubbing liquid and a gas as an atomization aid. The liquid inlets and gas inlets are connected to a first resonance chamber, connected to which on its downstream side, via a restrictor, there is at least one further resonance chamber. The last resonance chamber, seen in the flow direction, is connected to the outlet orifice of the hybrid nozzle.
The atomization aid used can, for example, be air or inert gas.
The hybrid nozzle can adopt both the operating mode of a pressure nozzle and the operating mode of a two-fluid nozzle. The characterizing feature of the hybrid nozzle is