Combustion chamber including dry and wet collection of particulate matter

Claim 1

In combination, a chamber having an upper cylindrical portion and a lower frustoconical portion, closure means for closing the top of the cylindrical portion, means for introducing hot dirty gases tangentially into the chamber, outlet means positioned in the bottom of the frustoconical portion through which centrifugally separated solids can be discharged, outlet duct means extending through the closure means and extending downwardly in concentric arrangement within the cylindrical portion, the lower end of the outlet duct means being open, through which the relatively clean hot gases can flow, a plurality of vertically spaced baffle means positioned within the outlet duct means, each baffle means consisting of an upper conical baffle concentric with the outlet duct means, the apex of which is at the top, and a lower frustoconical baffle spaced below the conical baffle, the frustoconical baffle being attached at its outer edge to the outlet duct means, and extending upwardly and inwardly therefrom, the conical and frustoconical baffles being of such size that they have vertically spaced, overlapping portions, means positioned above each conical baffle for introducing water onto the upper surface of each conical baffle, and pipe means extending from a point slightly above each frustoconical baffle to a point outside the chamber, through which water and entrained solids can be discharged.