Process and apparatus for gasification of refuse

Details Process and apparatus for gasification of refuse Process and apparatus for gasification of refuse

C - Chemistry, Metallurgy

10

J

C10J 3/56 (2006.01) B01J 8/00 (2006.01) B01J 8/24 (2006.01) C10J 3/54 (2006.01)

Patent

CA 2372111

Described herein are improvements relating to a gasification reaction vessel (10) for converting carbonaceous feedstock to synthetic gas. The reaction vessel (10) being of the type having a lower section (18) with a grid (14) for retaining a bed of fluidizable and heat-retaining particulate material (16). The improvements generally consisting of an upper section (20) of the reaction vessel (10) having an enlarged average internal cross-sectional area compared to the average internal cross-sectional area of the lower section (18) so as to facilitate disengagement and removal of said synthetic gas from the bed of particulate material. Also described in an improved gasification process using an oxygen-enriched fluidization agent wherein the oxygen content is about 25 to 35 %, preferably 30-40 % oxygen based on volume. Also described are improved conditioning processes for the hot synthetic gas exiting the reaction vessel (10). The conditioning process provides a clean, cold synthetic gas ready for use in various applications such as a fuel for boiler, furnace, internal combustion engine, etc.

L'invention porte sur des améliorations apportées à une cuve à réaction (10) de gazéification servant à la conversion d'apports carbonés en gaz de synthèse, ladite cuve étant du type à section inférieure munie d'une grille destinée à retenir un lit d'un matériau (16) fluidifiable particulaire conservant la chaleur. Les améliorations consistent d'une manière générale à accroître la section transversale intérieure moyenne de la partie supérieure (20) de la cuve (10) par rapport à celle de la partie inférieure (18) pour faciliter le dégagement et l'extraction du gaz de synthèse du lit de matériau particulaire. L'invention porte également sur une amélioration du procédé de gazéification par utilisation d'un fluidifiant enrichi en O, faisant passer la teneur volumique en O à environ 25-35 %, ou de préférence à 30-40 %; elle porte en outre sur un processus de traitement du gaz de synthèse chaud sortant de la cuve (10), fournissant un gaz de synthèse froid et épuré prêt à l'emploi pour différentes applications, telles que du fioul pour chaudières, pour fours industriels, pour moteurs à combustion interne, etc.

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