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Roller grate apparatus for simultaneously transporting and transferring heat to or from a bed of material particles has elongated cylindrical parallel horizontal rollers rotatably driven in the same direction; filler bars disposed in the nip between adjacent rollers and together with the rollers for

Roller grate apparatus for simultaneously transporting and transferring heat to or from a bed of material particles has elongated cylindrical parallel horizontal rollers rotatably driven in the same direction; filler bars disposed in the nip between adjacent rollers and together with the rollers forming a generally flat surface with constantly moving portions which continually tumble the material particles and urge them thereacross in a direction transverse to the roller axes; gas passage apertures in the rollers which permit a heat transfer gas stream to pass through the rollers; a heat transfer chamber spanning the rollers; and a fan for blowing a heat transfer gas stream through the chamber and the material bed being transported by the rollers.

대표청구항 ▼

Roller grate apparatus for simultaneously transporting, agitating, and exchanging heat with a bed of discrete solid mineral particles comprising, in combination, a plurality of parallel horizontal elongated cylindrical rollers mounted for rotation about their longitudinal axes, elongated filler memb

Roller grate apparatus for simultaneously transporting, agitating, and exchanging heat with a bed of discrete solid mineral particles comprising, in combination, a plurality of parallel horizontal elongated cylindrical rollers mounted for rotation about their longitudinal axes, elongated filler members disposed in the nip between adjacent rollers above their longitudinal axes, drive means for rotating said plurality of rollers in the same direction, said rollers together with said filler members forming a generally horizontal surface having continually moving portions which are adapted to agitate said particles and transport said bed across said surface in a direction transverse to the longitudinal axes of said rollers at a velocity which is a minor fraction of the circumferential velocity of said rollers, said rollers having gas passage apertures therein which permit a gas stream to pass therethrough in a direction transverse to their longitudinal axes, and means for passing a heat transfer gas stream in a generally vertical direction through said apertures and said bed while it is being transported and said particles are being agitated by said rollers.