Patent ID: 6932080

Claim:
Arrangement of a burner ( 2 ) and a heat exchanger ( 1 ), said heat exchanger ( 1 ) comprising a plurality of heat exchange elements ( 3 ) interconnected to each other with intermediate gaps, said heat exchanger ( 1 ) being arranged with an inlet ( 4 ′) and an outlet ( 5 ′), said burner ( 2 ) being connected to said inlet ( 4 ′) to said heat exchanger ( 1 ) for providing energy to said heat exchanger ( 1 ) by burning a fuel gas, said heat exchanger ( 1 ) being arranged for heat transfer from an outer surface of said heat exchange elements ( 3 ) to process air as a secondary gas, said burner ( 2 ) being arranged to burn said fuel gas inside said heat exchanger ( 1 ) wherein said burner ( 2 ) comprises a burner element, being located inside said heat exchanger ( 1 ); said burner element being arranged to provide a preferential direction for transfer of said energy through said heat exchange elements ( 3 ), and said heat exchanger ( 1 ) is constructed from a high temperature material to allow heat transfer to said secondary gas by radiation of said heat exchange elements ( 3 ), said radiation being visible radiation, said heat exchanger having a surface temperature in the range 450-1000° C.