D - Textiles – Paper – 21 – C
Patent
D - Textiles, Paper
21
C
D21C 11/04 (2006.01) B03C 3/01 (2006.01) B03C 3/12 (2006.01) B03C 3/88 (2006.01) D21C 11/06 (2006.01) D21C 11/12 (2006.01) F23C 9/08 (2006.01) F23J 15/06 (2006.01)
Patent
CA 2370968
A method and apparatus for producing clean, sweet, fuel gas for use in a combustion process by processing a waste stream from digestion of lignocellulosic material partially oxidizes the waste stream to form hot gases and molten salts and cools the hot gases and molten salts using a quench liquor to form quenched gas (76) and carbonate liquor (30). Particles are removed from the quenched gas to form a raw fuel gas by subjecting the quenched gas to a multi-step fume reduction process (80) which includes heat extraction (91) from the quenched gas to reduce particulate load and water content of the quenched gas to form a low fume fuel gas. H2S is removed from the low fume fuel gas using an H2S removal process (105) which is more selective for H2S than it is for CO2, the removing step forming clean, sweet, fuel gas and acid gases.
L'invention concerne un procédé et un appareil de production de gaz combustible propre non corrosif s'utilisant dans un processus de combustion. Ledit procédé consiste à traiter un flux de déchets provenant de la digestion de matières lignocellulosiques, en oxydant partiellement le flux de déchets afin de former des gaz chauds et des sels fondus, puis en faisant refroidir les gaz chauds et les sels fondus à l'aide d'une liqueur de trempe pour former un gaz trempé (76) et une liqueur carbonate (30). Des particules sont retirées du gaz trempé pour former un gaz combustible brut en soumettant le gaz trempé à un processus à phases multiples de réduction d'émanations (80), comprenant l'extraction de la chaleur (91) du gaz trempé afin de réduire la charge de particules et le contenu en eau du gaz trempé pour former un gaz combustible à faibles émanations. H2S est retiré du gaz combustible à faibles émanations à l'aide d'un processus de retrait de H2S (105) qui est plus sélectif pour H2S qu'il ne l'est pour CO2, la phase de retrait formant un gaz combustible propre non corrosif et des gaz acides.
Blue Jerry D.
Chan Phung H. M.
Downs William
Fuller Timothy A.
Verrill Christopher L.
Babcock & Wilcox Company The
Mcdermott Engineers & Constructors (canada) Ltd.
Mcdermott Technology Inc.
Ridout & Maybee Llp
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