Oxy-fuel combustion system and uses therefor

F - Mech Eng,Light,Heat,Weapons – 27 – D

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F27D 7/06 (2006.01) C22B 9/16 (2006.01) C22B 9/187 (2006.01) C22B 21/00 (2006.01) C22B 21/06 (2006.01) F23D 14/32 (2006.01) F23G 7/00 (2006.01)

Patent

CA 2393187

An oxygen fueled combustion system includes a furnace having at least one burner, an oxygen supply for supplying oxygen having a predetermined purity, and a carbon based fuel supply for supplying a carbon based fuel. The oxygen and the carbon based fuel are fed into the furnace in a stoichiometric proportion to one another to limit an excess of either the oxygen or the carbon based fuel to less than 5 percent over the stoichiometric proportion. The combustion of the carbon based fuel provides a flame temperature in excess of 4500°F. The exhaust gas stream from the furnace has substantially zero nitrogen-containing combustion produced gaseous compounds from the oxidizing agent and reduced green-house gases. Substantially less carbon based fuel is required than conventional combustion systems without a loss of energy output.

L'invention concerne un système de combustion d'oxygène et gaz combustible comprenant un four (14) équipé d'au moins un brûleur, une alimentation en oxygène destinée à acheminer un oxygène présentant une pureté prédéterminée, ainsi qu'une alimentation en combustible à base de carbone servant à acheminer un combustible à base de carbone. L'oxygène et le combustible à base de carbone sont acheminés dans le four (14) en proportion stoechiométrique l'un par rapport à l'autre en vue de limiter un excès de l'oxygène ou du combustible à base de carbone à moins de 5 % au-dessus de la proportion stoechiométrique. La combustion du combustible à base de carbone permet d'obtenir une température de flamme en excès de 4500 DEG F. Le flux de gaz d'échappement provenant du four (14) est sensiblement exempt de composés gazeux de combustion contenant de l'azote en provenance de l'agent d'oxydation, et présente une teneur réduite en gaz à effet de serre. Par ailleurs, ce système requiert une quantité sensiblement inférieure de combustible à base de carbone par rapport aux systèmes de combustion classiques, sans pour autant présenter un rendement énergétique réduit.

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