Patent ID: 8679225

Claim:
An electrostatic precipitator comprising (i) a housing having a central chamber, an inlet region comprising a flow inlet and an outlet region comprising a flow outlet, the housing being constructed and arranged to receive a gaseous flow in a gaseous flow direction between the flow inlet and the flow outlet; (ii) a plurality of screens secured in sets within the central chamber to comprise at least one set of electrically chargeable first screens and at least one set of electrically grounded second screens wherein each set of electrically chargeable first screens, (a) all the screens of the set are constructed and arranged to be provided in operation with an identical electrical charge selected from one of a positive charge and a negative charge; (b) the set is provided with a plurality of spikes constructed and arranged to protrude into the gaseous flow in a direction substantially opposed to the gaseous flow direction; and for each set of electrically grounded second screens, all the screens are constructed and arranged to be electrically grounded in operation; and (iii) at least one screen cleaning means operatively connected to each set of screens.