Abstract: A device for rapping electrode carriers and supporting same within an electrostatic precipitator whereby dust accumulating upon electrodes extending vertically from the electrode carriers are removed. The rapping assembly and electrode support means are suspended from the roof of an electostatic precipitator wherein the electrode support means includes a rapping shaft drive means at the lower end thereof and electrode carrier means. The rapping shaft drive means is in driving relation with a rapping shaft wherein the rapping shaft rotates at a preselected rate and includes a plurality of rapping members attached thereto, each rapping member being disposed to rap each electrode carrier which in turn sends vibrations through the electrodes which extend vertically downwardly from the electrode carriers thereby removing dust accumulating on the electrodes.

Abstract: A wet scrubbing apparatus including a housing with a fluid flow inlet and a fluid flow outlet and a plurality of contactor beds disposed therein. Each contactor bed has an inlet and an outlet in communication with the fluid flow inlet and fluid flow outlet, respectively, of the housing and each of the contactor beds includes a damper assembly pivotally disposed within its inlet. As the gas flow rate through the apparatus changes, individual contactor beds can be removed from or brought onto stream by closing or opening selected damper assemblies.