Process for combustion of sulfur-containing, carbonaceous...

F - Mech Eng,Light,Heat,Weapons – 28 – B

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F28B 7/00 (2006.01) C10L 10/00 (2006.01) F01N 3/08 (2006.01) F23G 5/00 (2006.01) F23J 7/00 (2006.01)

Patent

CA 2116688

In a process for burning a combustible, sulfur-containing carbonaceous material (16), such as coal (40), municipal waste, or tires, recrystallized CaCO3 is introduced into the combustion zone (10, 42) along with the fuel. The amount of SO2 and NO2 generated is substantially reduced as compared to conventional processes and, even with no post-scrubbing equipment, the emission levels compare favorably to the emission levels state-of-the-art power plants using the same coal with extensive emission controls. The present process also acts to convert sulfur resident in coal into elemental sulfur and loose sulfur compounds and to reduce the particulate output.

Dans un procédé servant à brûler un matériau carboné combustible et contenant du soufre (16), tel que du charbon (40), des déchets de décharge publique ou des pneus, on introduit du CaCO3 recristallisé dans la zone de combustion (10, 42) avec le combustible. La quantité des émissions de SO2 et NO2 est sensiblement réduite par rapport aux procédés traditionnels et, même en l'absence d'installation de post-nettoyage, les niveaux d'émission sont inférieurs à ceux des installations de l'état actuel de la technique utilisant le même charbon avec une régulation importante des émissions. Le procédé sert également à convertir le soufre contenu dans le charbon en composés de soufre élémentaire et de soufre désagrégé, ainsi qu'à réduire la production de matières particulaires.

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