Abstract: A mechanism for rapping the electrodes of an electrostatic precipitator for the purpose of dislodging dust deposited on the electrodes is disclosed. The rapping mechanism incorporates a pair of impact beams (1, 1') between which collecting electrodes are suspended. The impact beams are so arranged that the beams slide on the upward-facing edges of a pair of support carriers (2, 2') secured to the precipitator housing. A drop hammer (7) rotatable about a horizontal shaft raps an anvil (6) secured to the impact beam pair (1, 1'), thereby causing a horizontal vibration of the impact beam pair (1, 1') without imparting any impact energy to the precipitator housing. A pair of springs (12) secured to the precipitator housing, one at each end of the impact beam pair, act against the horizontal movement of the impact beam pair and restore the impact beam pair to its original position.

Abstract: A rapping mechanism for the rapping of discharge and field electrodes in a high voltage driven electrostatic precipitator used for the cleansing of smoke laden gases from industrial plants, power works etc. The rapping effect is obtained by metal balls which run from the top of the precipitator to its bottom along a number of sloping tracks which are mounted stepwise, with differences of level, on the electrodes or on the carrying frames of same. A single ball in connection with its changing from one track to the following track, when falling freely and moving horizontally, hits both the underlying track and a stop mounted near the lower end of the track thereby causing each electrode carrying frame to receive two consecutive blows of different force so that the frame is rapped and the deposited dust is loosened and falls off. A lifting device of known type carries the balls from a terminated passage down along the tracks to a starting position for a renewed passage of the tracks.

Abstract: A rapping mechanism for an electrostatic precipitator comprises hammers (1) which are swingable on a shaft (2) carrying a driver pin (6). As the shaft rotates, the driver pin (6) engages a surface (7) of a pawl (4), which is pivoted on the hammer (1), thus picking up and raising the hammer until the pawl (4) is disengaged from the driver pin (6) by an adjustable release tap (9). The hammer then swings back down under gravity and raps a bar (13) connected to electrodes.

Abstract: A discharge electrode is disclosed for producing ion emission in an electrostatic precipitator. The electrode includes a rigid cylindrical tubular member having a plurality of protrusions extending outwardly therefrom. The protrusions preferably have rounded free end portions and are formed either by individual rods integrally attached to the member or by one or more wires attached to the surface of the member and having folds which are selectively spaced apart to provide the desired dispersion of the ion emission. The wires may also be embedded in depressions defined in the surface of the member. The invention also pertains to an improved electrostatic precipitator incorporating the inventive discharge electrode.