F - Mech Eng,Light,Heat,Weapons – 23 – D
Patent
F - Mech Eng,Light,Heat,Weapons
23
D
158/7
F23D 14/00 (2006.01) F23C 13/00 (2006.01)
Patent
CA 2015620
ABSTRACT OF THE DISCLOSURE A natural draft, catalytic heater comprises a tubular body which defines an elongated fluid flow passage having an air/fuel mixture inlet at one end and a combustion product outlet at the other end thereof. A primary catalytic burner is disposed within the passage adjacent the inlet for reacting most of the air/fuel mixture introduced into the inlet. A secondary catalytic burner is disposed within the passage downstream of the primary catalytic burner for completing combustion of any un-oxidized fuel in the exhaust from the primary catalytic burner. Low pressure drop through the primary burner is achieved by a tubular burner construction held against the passage wall and combustion of most of the reactants is achieved by providing an appropriate catalyst surface area. A stirring element may be placed within the burner for gently urging reactants outwardly towards the catalyst. A low pressure drop through the secondary burner is achieved by providing a plurality of axial passages which present relatively little resistance to gas flow. The surfaces of the passages are coated with a catalyst material to ensure that any un-oxidized reactants are oxidized.
Browne Paul A.
Dobbs Kirk A.
Browne Paul A.
Dobbs Kirk A.
Gowling Lafleur Henderson Llp
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