Process for cooling hot bulk material and cooler

Abstract

A cooler for cooling hot bulk material, in which cooling gas flows transversely to the conveying direction through a bulk material bed cooling the bulk material. An apparatus carrying the bulk material bed has a ventilation floor comprised of movable planks extending in the conveying direction through which cooling gas flows. At least two adjacent planks are moved simultaneously in the conveying direction and non-simultaneously counter to the conveying direction. The planks have differently configured surfaces, on which the bulk material bed lies, in the conveying direction, and these surfaces, due to different frictional locking with the bulk material bed lying thereon, lead to differing mean transport speeds, and as a result the bulk material bed is stretched in a region of quicker conveying and compressed in a region of slower conveying. The apparatus tumbles the bulk material with vertical mixing, thereby heat is recuperated efficiently.

1 - 10 . (canceled) 
     
     
         11 . A cooler for cooling hot bulk material, in which cooling gas flows approximately transversely to the conveying direction through a bulk material bed and in the process takes up the heat of the bulk material,
 wherein an apparatus which carries the bulk material bed has a ventilation floor comprising movable planks which extend in the conveying direction through which cooling gas flows, and   wherein the conveying principle provides for at least two adjacent planks being moved simultaneously in the conveying direction and non-simultaneously counter to the conveying direction, comprising:   the planks having differently configured surfaces on which the bulk material bed lies, in the conveying direction, and these surfaces, on account of their different frictional locking with the bulk material bed lying thereon, lead to mean transport speeds which differ from one another, such that as a result the bulk material bed is stretched in a region of quicker conveying and compressed in a region of slower conveying.   
     
     
         12 . The cooler according to  claim 11 , wherein a first configuration of the differently configured surfaces is planar, and a second configuration of the differently configured surfaces is a supporting grate, which has overlapping profiles between which cooling gas flows into the bulk material bed. 
     
     
         13 . The cooler according to  claim 11 , wherein one configuration of the surfaces has a wedge form, the flat end of which is oriented counter to the conveying direction. 
     
     
         14 . The cooler according to  claim 11 , wherein one configuration of the surfaces has a wedge form which is inclined to the side and a flat end of which is oriented counter to the conveying direction. 
     
     
         15 . The cooler according to  claim 11 , wherein the differently configured surfaces alternate at regular intervals along the conveying direction. 
     
     
         16 . The cooler according to  claim 11 , wherein the differently configured surfaces are arranged in an oblique pattern respect to the conveying direction. 
     
     
         17 . Cooler according to  claim 11 , wherein the differently configured surfaces form an arch pattern, the arches being arranged symmetrically with respect to the conveying direction. 
     
     
         18 . A process for cooling hot bulk material, comprising the steps:
 transporting the bulk material as a bulk material bed via a ventilation floor,   flowing a cooling gas approximately transversely to a conveying direction through the bulk material bed,   providing planks which extend in the conveying direction as the ventilation floor, and   moving at least two adjacent planks simultaneously in the conveying direction and non-simultaneously counter to the conveying direction,   wherein the planks have differently configured surfaces, on which the bulk material bed lies, in the conveying direction, and these surfaces, on account of their different frictional locking with the bulk material bed lying thereon, lead to mean transport speeds which differ from one another, such that as a result the bulk material bed is stretched in a region of quicker conveying and compressed in a region of slower conveying.   
     
     
         19 . The process according to  claim 18 , wherein one configuration of the surfaces has a wedge form which, when a plank is moved counter to the conveying direction, circulates the bulk material bed such that bulk material is conveyed onto the borderline extending in the conveying direction between two planks. 
     
     
         20 . The process according to  claim 18 , wherein the differently configured surfaces are arranged in a regular pattern.