Substrate having corrugated sheet(s) and channel(s) for treating exhaust gases of combustion engines

Abstract

The present invention relates a substrate having corrugated sheet(s) and channel(s) for treating exhaust gases of combustion engines. The present invention also relates to methods for manufacturing and using said substrate having said open channel(s). The substrate ( 1 ) comprises at least one corrugated sheet ( 3 ) having depressions ( 3 d ) and one flat wire mesh sheet ( 2 ) having depressions ( 2 d ) which is connected to said corrugated sheet ( 3 ) and between said flat wire mesh sheet ( 2 ) and said corrugated sheet ( 3 ) there are at least partially open channels (POC) for exhaust gas (EG) flow, and the depth of depression ( 2 d ) of said flat wire mesh sheet ( 2 ) is 0.05-0.5 mm smaller than the height of the corrugation ( 3 c ) of said corrugated sheet ( 3 ).

1 . A substrate having corrugated sheet(s) and channel(s) for treating exhaust gases of combustion engines, characterized in that the substrate ( 1 ) comprises at least one corrugated sheet ( 3 ) having depressions ( 3   d ) and one flat wire mesh sheet ( 2 ) having depressions ( 2   d ) which is connected to said corrugated sheet ( 3 ) and between said flat wire mesh sheet ( 2 ) and said corrugated sheet ( 3 ) there are at least partially open channels (POC) for exhaust gas (EG) flow, and that the depth of depression ( 2   d ) of said flat wire mesh sheet ( 2 ) is 0.05-0.5 mm smaller than the height of the corrugation ( 3   c ) of said corrugated sheet ( 3 ). 
     
     
         2 . A substrate according to  claim 1 , characterized in that said corrugated sheet ( 3 ) is a corrugated wire mesh sheet. 
     
     
         3 . A substrate according to  claim 1 , characterized in that said depressions ( 3   d ) of the corrugated sheet ( 3 ) has been matched to the depressions ( 2   d ) of the flat wire mesh sheet ( 2 ). 
     
     
         4 . A substrate according to  claim 1 , characterized in that the depth of the depression ( 2   d ,  3   d ) is 0.5-1.5 mm. 
     
     
         5 . A substrate according to  claim 1 , characterized in that the height of the corrugation ( 3   c ) is 1.0-3.0 mm. 
     
     
         6 . A substrate according to  claim 1 , characterized in that mesh number of the mesh sheet is from 30 to 300. 
     
     
         7 . A substrate according to  claim 1 , characterized in that said flat wire mesh sheet ( 2 ) and said corrugated sheet ( 3 ) have been attached to each other by welding or by brazing. 
     
     
         8 . A substrate according to  claim 1 , characterized in that said sheets ( 2 ,  3 ) have been at least partially covered by support and/or catalytic material. 
     
     
         9 . A method for using a substrate according to  claim 1  for purifying exhaust gases (EG). 
     
     
         10 . A method for manufacturing a substrate having corrugated sheet(s) for treating exhaust gases of combustion engines, characterized in that a flat wire mesh sheet ( 2 ) having depressions ( 2   d ) is connected to a corrugated sheet ( 3 ) having depressions ( 3   d ) so that between said flat wire mesh sheet ( 2 ) and said corrugated sheet ( 3 ) there are at least partially open channels (POC) for exhaust gas (EG) flow, and that the depth of depression ( 3   d ) being smaller than the height of the corrugation ( 3   c ). 
     
     
         11 . A method according to  claim 9 , characterized in that said flat wire mesh sheet ( 2 ) is connected to said corrugated sheet ( 3 ) by rolling. 
     
     
         12 . A method according to  claim 9 , characterized in that said flat wire mesh sheet ( 2 ) is connected to said corrugated sheet ( 3 ) by stacking or folding. 
     
     
         13 . A method according to  claim 9 , characterized in that a flat wire mesh sheet ( 2 ) is connected to a corrugated sheet ( 3 ) by making depressions ( 2   d ,  3   d ) to said flat wire mesh sheet ( 2 ) and corrugated sheet ( 3 ) and matching these depressions ( 2   d ,  3   d ) to each other. 
     
     
         14 . A method according to  claim 9 , characterized in that said flat wire mesh sheet ( 2 ) and said corrugated sheet ( 3 ) are attached to each other by welding or by brazing. 
     
     
         15 . A substrate according to  claim 2 , characterized in that said depressions ( 3   d ) of the corrugated sheet ( 3 ) has been matched to the depressions ( 2   d ) of the flat wire mesh sheet ( 2 ). 
     
     
         16 . A substrate according to  claim 2 , characterized in that the depth of the depression ( 2   d ,  3   d ) is mm. 
     
     
         17 . A substrate according to  claim 3 , characterized in that the depth of the depression ( 2   d ,  3   d ) is mm. 
     
     
         18 . A substrate according to  claim 2 , characterized in that the height of the corrugation ( 3   c ) is mm. 
     
     
         19 . A substrate according to  claim 3 , characterized in that the height of the corrugation ( 3   c ) is mm. 
     
     
         20 . A substrate according to  claim 4 , characterized in that the height of the corrugation ( 3   c ) is mm.