Patent ID: 7247185

Claim:
A device for treatment of a gas flow, said device comprising: at least one body ( 3 ) configured to cause a conversion in the composition of a gas flow during operation of the device, said body ( 3 ) having a modular construction comprising a plurality of sections ( 26 , 26 ′, 27 , 27 ′, 36 ), each with different internal structures that allow gas to flow therethrough, said sections ( 26 , 26 ′, 27 , 27 ′, 36 ) being arranged so that at least a portion of the gas flows through at least two sections, each of said sections having different internal structures that form gas flow passages ( 11 a , 11 b ) and at least one of said sections ( 26 , 26 ′, 27 , 27 ′, 36 ) comprising an internal cavity ( 20 ) extending substantially parallel to the gas flow passages ( 11 a , 11 b ) of that section and which are distributed around said internal cavity ( 20 ), wherein the body ( 3 ) comprises at least one first section ( 27 ) that is provided with a plurality of gas flow passages ( 11 ) that extend essentially parallel to each other and wherein the body ( 3 ) is arranged to permit heat exchange between gas flows in adjacent gas flow passages ( 11 ) and said device being arranged so that the main direction of the gas flow in one gas flow passage ( 11 ) is essentially the opposite of the main direction of the gas flow in an adjacent gas flow passage ( 11 ) during operation of the device.