B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
23/349, 183/40
B01D 47/00 (2006.01) B01D 50/00 (2006.01) B01D 53/50 (2006.01) B03C 3/00 (2006.01) B03C 3/013 (2006.01) B03C 3/02 (2006.01) F23J 15/02 (2006.01)
Patent
CA 1162032
Method And Apparatus For Purification of Gases Abstract The present invention is directed to a method for selective purification of gases. The method comprises feeding an exhaust gas containing a solid impurity and a gaseous impurity to a separator. A substantial portion of the solid impurity is separated. Then, the partially- purified gas is fed to a spray dryer. That gas is sprayed with an absorption agent to separate gaseous impurities. Then, the further, partially-purified gas is fed to another separator to separate remaining solid impurity. An exhaust gas which is substantially free of solid and gaseous impurities and fly ash having a desired quality are recovered. The invention is also directed to an apparatus for selective purification of exhaust gas, containing solid and gaseous impurities, from a boiler plant (1). The apparatus comprises a solid-separation means (3) for separating a substantial portion of the solid impuri- ties from the exhaust gas. Then, a means for feeding the partially purified exhaust gas to a spray-drying means (5) is included for separating gaseous impurity from the exhaust gas. Then, a means for feeding the further, partially-purified exhaust gas to another solid-separation means (7) follows the spray-drying means. A plant for selective removal of fly ash and sulphur oxides from boiler plant exhaust gas is also described.
347826
Osler Hoskin & Harcourt Llp
Smidth (f.l.) & Co. Of Canada Limited
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