Patent ID: 6139313
Filing Date: 2000-10-31
Classification: B01J,F23C,F27B

Abstract:
A furnace of the kind in which a toroidal fluid flow heating zone may be established, the furnace including a chamber in which there is provided an inner block, and a ring of angled blades between the inner block and an inner wall of the chamber; means for delivering fluid into the chamber in such a way that the fluid passes through gaps between the blades and establishes a toroidal fluid flow heating zone in the chamber above the ring of angled blades; means for injecting feed particulate material into the chamber in a region where the toroidal fluid flow heating zone is to be established; and means for injecting fuel into the chamber in a region above the ring of angled blades such that the region in the chamber at which the heating zone is established is elevated above the ring of angled blades.