Abstract: A method and system for treating a fluid by trapping particles of an active material suspended in a flow stream by way of a particle-trap structure so as to form a multi-layer filtering media to treat the fluid. The particle trap is fully regenerative configured so that the particles are readily back flushed after achieving their absorption capacity in preparation for loading a fresh charge of active particles. The method also describes a combination of a centrifuge separator in-line with the regenerative particle trap configured such that the separator first removes contaminants of considerably different specific gravity than the fluid and the regenerative active particle trap then removes the remaining contaminants by absorption or chemical treatment.

Abstract: An air filter includes a stack of filter discs formed with contacting faces having surface formations defining filtering passageways between adjacent discs for removing solid particles from the air passing through the stack. The filter discs in the stack further include electrodes spaced from each other axially of the stack and connectable to a voltage source for producing an electrical field attracting solid particles towards the discs to thereby enhance removal of the solid particles from the air passing through the stack. The filter discs in the stack include a first plurality of insulating discs composed of insulating material, and a second plurality of electrode discs composed of electrically-conductive material, with the electrode discs separated from each other by at least one insulating disc.

Abstract: A filter-cleaning device and method for cleaning a filter (10) utilizing a compressible fluid pulse generator (20) including a pressure tank (21), a tank inlet (23) for inletting pressurized air or other compressible fluid, and a valve member (24) normally in a closed position closing the tank outlet (28), but being openable in a quick-action manner to produce a high-pressure high-flow impulse of fluid applied via the tank outlet to the filter outlet to back-flush the filter.

Abstract: A multiple disc filter includes a plurality of discs arranged in a stack with a face of each disc in contact with a face of the next adjacent disc in the stack. The contacting faces of the discs include surface formations defining small filtering passageways between adjacent discs for filtering a fluid passing between them. The surface formations include a rib array of spaced rib sections integrally formed on a flat surface of one of the contacting faces; and a protrusion array of spaced, discrete protrusions spacing the rib array of the one contacting face from a flat surface of the other contacting face.