Abstract: An apparatus and method for monitoring electrode rapper operation in an electrostatic precipitator. The actual movement or impact of the hammer in an electrode rapper is sensed and a control signal is generated and transmitted to a monitor in response thereto in order to produce an immediate and accurate indication of rapper failure.

Abstract: A fluid filter construction comprises a mass of filtering material, such as activated charcoal, in which fluid flow passage forming members are embedded. The filtering material itself serves as the means for sealing the filter against leakage of unfiltered fluid into or out of the filter and against bypassing from the inlet to the outlet side of the filter.

Abstract: A dust-collecting electrostatic precipitator has a housing in which a multiplicity of collecting-electrode walls are provided in transversely spaced parallel relationship and defined between two gas channels. Each wall consists of a plurality of individual collecting-electrode strips whose side edges are hooked loosely into the side edges of adjacent strips so as to prevent relative rotation of the strips. At the top, all the strips of each collecting-electrode wall are secured to a common carrier while, at the bottom, the strips of each electrode wall are connected to a common rapping member or bar. The individual collecting-electrode strips are provided with spacers which are distributed over the height of the strip and project transversely therefrom, each spacer being anchored to one strip and extending across one of the gas channels to terminate just short of an opposing electrode strip while defining a gap therewith.

Abstract: Impacting devices are provided to strike the sway frame which supports the filtering bags in a bag house. The impacting devices each include a stationarily-mounted bracket, an externally-threaded sleeve that is adjustably received in the bracket, a bolt-like striker member slidable in the sleeve and a coil spring which biases the striker member to an extended position relative to the sleeve.

Abstract: A portable filter bag house assembly includes a collapsible main frame, a plenum chamber attached to the main frame, and a sub-frame carried by the main frame for shaking movement, the sub-frame supporting filter bags to extend toward the plenum chamber for communication therewith.

Abstract: A cleaning arrangement for a bag filter in which the bags thereof are subjected to a recipricatory motion as effected by an electro-magnetic attraction whereby a collection of dust clinging to the outer surface thereof is jarred free and caused to fall to the bottom of a surrounding filter housing from which it may be removed.