Suspension device and rapping mechanism for electrodes in an electrostatic precipitator

A suspension device and rapping mechanism for vertically mounted electrodes (5,9), in a high-voltage supplied electrostatic precipitator, and wherein a conductive suspension device comprises at least two U-shaped or angular carrier beams (1) arranged perpendicularly to the precipitator sections or the electrode rows and above and near their upper ends, said carrier beams being suspended in vertical carrier rods (2) which at their upper ends are secured in insulators (3) in the roof of a precipitator housing, the rapping mechanism comprising means (13) mounted on or near the precipitator housing roof in order to produce a vertically acting impact energy towards the upwardly facing ends of the electrodes (5,9) thereby rapping or vibrating the latter, and vertical support or frame tubes comprising some of said electrodes (5) of each precipitator section being mutually connected by at least one upper and a lower horizontal frame tube (8',8") to form vertical frames for the electrode rows, and the remaining vertically mounted electrodes (9,9') of a precipitator section being arranged between the horizontal frame tubes (8',8"), wherein a number of U-shaped support irons (4) are secured on the sides of the carrier beams (1) facing the electrode rows and mounted so that the horizontally extending legs of the U in said U-shaped support irons are located vertically above each other, the vertical precipitator support or frame tubes comprising some of said electrodes (5) of each precipitator section or electrode row being suspended in said legs, that the upper portion of the vertical support or frame tubes comprising some of said electrodes (5) are formed as a solid rod (12), vertically movably secured in the individual U-shaped support iron (4) and with its upwardly facing end comprising an abutment or an anvil for the impact means (13) of the rapping mechanism, and that the U-shaped support irons (4) have holes (14) in the legs of the U in said U-shaped support irons being arranged vertically above each other for receiving the rod-shaped upper portion (12) of the vertical support or frame tubes so that the suspension of the tubes in the support irons are partly vertically resilient and partly torsionally rigid.