Patent ID: 7146915

Claim:
An extractor/cooler ( 1 ) of solid loose hot materials ( 3 ) produced either by fluidized bed boilers ( 4 ) or by various industrial processes basically comprising a sealed metal container means ( 5 ) connected to the boiler ( 4 ) through a runner ( 6 ), inside said container ( 5 ) a motorized driving means with a metal belt conveyor ( 2 ) having plates with appropriate slots ( 16 ) that retain the solid loose hot materials ( 3 ) but permit cooling air flow through the loose hot materials ( 3 ) and extension means ( 18 ) the hot materials ( 3 ) coming from the runner ( 6 ) being received on said belt conveyor ( 2 ), due to the gravitational force from the combustion chamber thus forming a continuous bed of material ( 3 ) whose cooling is carried out through the convective thermal exchange with air flows, and through conductive thermal exchange with the metal belt conveyor ( 2 ), and/or through thermal exchange with a the water cooled upper and side part of the container ( 5 ); said extension means ( 18 ) increasing conductive thermal exchange surface between the loose hot materials ( 3 ) and metal belt conveyor ( 2 ).