Coal/coke/heavy residual oil boiler with sulfur and carbon...

F - Mech Eng,Light,Heat,Weapons – 23 – J

Patent

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F23J 15/00 (2006.01)

Patent

CA 2758422

A pulverized coal/coke (PC) boiler combusts carbon-based fuel with substantially pure oxygen and a flue gas recirculation stream (containing predominately carbon dioxide) at varied ratios to achieve a desired boiler temperature profile while producing captured sulfur, a high purity captured CO2 and electric power. The boiler includes at least one of (a) a mechanism for admixing a pulverized solid carbon-based fuel with an alkali metal salt and (b) injecting alkali metal salt into the boiler combustion zone containing a pulverized solid carbon-based fuel.

La présente invention concerne une chaudière à charbon/coke pulvérisé (PC) qui brûle un combustible à base de carbone en utilisant de l'oxygène sensiblement pur et un flux de recirculation de gaz de combustion (contenant principalement du dioxyde de carbone) à des taux variés de façon à obtenir un profil de température de chaudière souhaité tout en produisant du soufre capturé, du CO2 capturé de grande pureté, et de l'énergie électrique. La chaudière comprend (a) un mécanisme adapté pour mélanger un combustible à base de carbone solide pulvérisé à un sel de métal alcalin; et/ou (b) pour injecter le sel de métal alcalin dans la zone de combustion de la chaudière contenant un combustible à base de carbone solide pulvérisé.

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