PROCESS AND APPARATUS FOR GASIFICATION OF REFUSE

摘要

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.