Fluidized bed heat exchanger

Abstract

Fluidized bed heat exchanger with a chamber ( 24 ), comprising at least one solid particles inlet port ( 22 ) at least one solid particles outlet port ( 30 ), arranged at a distance to the at least one inlet port ( 22 ), means ( 46 ) for introducing a fluidizing gas from a bottom area ( 24 b ) of said chamber ( 24 ) into said chamber ( 24 ), wall-like heat transfer means ( 28 ) in its lower part, extending in a main flow direction of the solid particles on their way from the inlet port ( 22 ) to the outlet port ( 30 ), substantially parallel to each other, with a space (C) between adjacent heat transfer means ( 28 ), at least one baffle ( 50,52 ) in its upper part, extending substantially perpendicular to the heat transfer means ( 28 ), downwardly from a chamber ceiling ( 24 c ), with its lower end at a distance to the heat transfer means ( 28 ) and comprising extensions (E), protruding into the space (C) between adjacent heat transfer means ( 28 ), and couplings (B) to mechanically connect the said heat transfer means ( 28 ) to said extensions (E).

1 . Fluidized bed heat exchanger with a chamber ( 24 ), comprising
 1.1 at least one solid particles inlet port ( 22 )   1.2 at least one solid particles outlet port ( 30 ), arranged at a distance to the at least one inlet port ( 22 ),   1.3 means ( 46 ) for introducing a fluidizing gas from a bottom area ( 24   b ) of said chamber ( 24 ) into said chamber ( 24 ),   1.4 wall-like heat transfer means ( 28 ) in its lower part, extending   1.4.1 in a main flow direction of the solid particles on their way from the inlet port ( 22 ) to the outlet port ( 30 ),   1.4.2 substantially parallel to each other,   1.4.3 with a space (C) between adjacent heat transfer means ( 28 ),   1.5 at least one baffle ( 50 , 52 ) in its upper part, extending   1.5.1 substantially perpendicular to the heat transfer means ( 28 ),   1.5.2 downwardly from a chamber ceiling ( 24   c ),   1.5.3 with its lower end at a distance to the heat transfer means ( 28 ) and comprising   1.5.4 extensions (E), protruding into the space (C) between adjacent heat transfer means ( 28 ), and   1.6 couplings (B) to mechanically connect the said heat transfer means ( 28 ) to said extensions (E).   
     
     
         2 . Fluidized bed heat exchanger according to  claim 1 , wherein the at least one baffle ( 50 ,  52 ) has at least one opening (O) to allow pressure adjusting. 
     
     
         3 . Fluidized bed heat exchanger according to  claim 1 , wherein the at least one baffle ( 50 ,  52 ) is designed as a curtain with numerous small, discrete openings. 
     
     
         4 . Fluidized bed heat exchanger according to  claim 1 , wherein the at least one baffle ( 50 ,  52 ) extends between opposite walls ( 24   s ) of the chamber ( 24 ). 
     
     
         5 . Fluidized bed heat exchanger according to  claim 1 , wherein the at least one baffle ( 50 ,  52 ) is made of pressure pipes (PP) to transport water of 270° C. to 400° C. at 90 bar to 320 bar. 
     
     
         6 . Fluidized bed heat exchanger according to  claim 1 , wherein the pressure pipes (PP) of each baffle ( 50 ,  52 ) are connected to a central feeding line (CFL). 
     
     
         7 . Fluidized bed heat exchanger according to  claim 1 , with multiple baffles ( 50 ,  52 ), arranged parallel to each other at different distances to the inlet port ( 22 ). 
     
     
         8 . Fluidized bed heat exchanger according to  claim 1 , wherein the heat transfer means ( 28 ) are designed as heat exchange tubes (ET) for conveying a heat transfer medium and arranged in a meandering fashion, thereby providing a vertically oriented wall-like pattern. 
     
     
         9 . Fluidized bed heat exchanger according to  claim 1 , wherein the heat transfer means ( 28 ) are designed as heat exchange tubes (ET) to transport steam of 300° C. to 650° C. at 80 bar to 300 bar. 
     
     
         10 . Fluidized bed heat exchanger according to  claim 1 , wherein the heat transfer means ( 28 ) are designed as heat exchange tubes (ET) which are connected to a central feeding tube ( 42 ,  44 ). 
     
     
         11 . Fluidized bed heat exchanger according to  claim 1 , wherein the heat transfer means ( 28 ) and the baffles ( 50 ,  52 ), including their extensions (E), form a three-dimensional grid-like structure. 
     
     
         12 . Fluidized bed heat exchanger according to  claim 1 , wherein the heat transfer means ( 28 ) and the baffles ( 50 ,  52 ) are arranged at about 90 degrees to each other. 
     
     
         13 . Fluidized bed heat exchanger according to  claim 1  with chamber walls ( 14   w ,  24   w ,  24   s ) being at least partially water-cooled. 
     
     
         14 . Fluidized bed heat exchanger according to  claim 13  with said chamber walls ( 14   w ,  24   w ,  24   s ) are made of pressure tubes, with fins between adjacent pressure tubes.