Gas slide heat exchanger

Abstract

A heat exchanger ( 1 ) for treating bulk material comprises an elongated pipe ( 2 ) having an inlet ( 3 ) for introducing the bulk material at one end and an outlet ( 4 ) for withdrawing the bulk material at the other end. A plurality of heat exchange tubes ( 5 ) extends along the longitudinal direction of the pipe ( 2 ), and a plurality of fluidization nozzles ( 9, 9 a ) for introducing a fluidizing gas is provided at the bottom ( 10 ) of the pipe ( 2 ).

1 - 13 . (canceled) 
     
     
         14 . Heat exchanger for treating bulk material comprising an elongated pipe having an inlet for introducing the bulk material at one end and an outlet for withdrawing the bulk material at the other end, wherein a plurality of heat exchange tubes extends along the longitudinal direction of the pipe, wherein a plurality of fluidization nozzles for introducing a fluidizing gas is provided at the bottom of the pipe, wherein at least some of the fluidization nozzles extend from the bottom of the pipe into the upper region of the pipe. 
     
     
         15 . Heat exchanger according to  claim 14 , wherein the fluidization nozzles are directed perpendicular to the conveying direction of the bulk material. 
     
     
         16 . Heat exchanger according to  claim 14 , wherein the pipe is tilted downwards in the conveying direction of the bulk material, preferably at an angle of 5 to 10°. 
     
     
         17 . Heat exchanger according to  claim 14 , wherein the pipe comprises a double wall for receiving a heat exchange medium. 
     
     
         18 . Heat exchanger according to  claim 14 , wherein the pipe is formed by a plurality of smaller pipes for receiving a heat exchange medium. 
     
     
         19 . Heat exchanger according to  claim 14 , wherein transport nozzles enter into the pipe at a location distanced from the bottom of the pipe, preferably by about 25 to 75% of the height of the pipe. 
     
     
         20 . Heat exchanger according to  claim 19 , wherein the transport nozzles are inclined downwards at an angle of 30 to 60°. 
     
     
         21 . Heat exchanger according to  claim 19 , wherein the transport nozzles are inclined in the conveying direction of the bulk material. 
     
     
         22 . Heat exchanger according to  claim 14 , wherein the fluidization and/or transport nozzles are located in respective rows along the longitudinal direction of the pipe. 
     
     
         23 . Heat exchanger according to  claim 22 , wherein common supply pipes are provided for supplying fluidizing gas to each row of nozzles. 
     
     
         24 . Heat exchanger according to  claim 14 , wherein the flow rate of the fluidization and/or transport nozzles can be regulated. 
     
     
         25 . Heat exchanger according to  claim 14 , wherein a heat exchange medium is directed counter-currently or co-currently to the conveying direction of the bulk material.