Gas cleaners

Claim 1

In a gas cleaning apparatus of the electric precipitator type having a plurality of discharge and collecting electrodes, said discharge electrodes being insulated from said collecting electrodes and separated therefrom to form a gap therebetween, a voltage source connected between said discharge electrodes and said collecting electrodes for establishing an electric field therebetween, and means for forcing a gas stream to be cleaned from particles suspended therein through said gap between said discharge and collecting electrodes, whereby said particles in said gas stream are attracted by said collecting electrodes for deposition thereon, the improvement wherein said discharge electrodes are mounted stationary on an inner cylinder surface, said collecting electrodes are mounted on an outer concentrical cylinder surface for rotation around said discharge electrodes, means are provided for rapidly rotating said collecting electrodes, and an outwardly closed casing connects with the outer side of said collecting electrodes, whereby said gap between said discharge and collecting electrodes is annular, said electrical field is directed radially between said cylinder surfaces, and particles deposited on said collecting electrodes have kinetic energy imparted to them such that they are thrown out into said casing by centrifugal force.