Gasifier adapted to generate activated carbon

摘要

An improved gasification system, in which synthesis gas is produced through the operation of a fuel gas production bed comprising an upper layer (66) of organic input material, typically in the form of pellets or briquettes of substantially uniform size and configuration, two intermediate layers, one intermediate layer (70) for carbonizing the input material and the other intermediate layer (72) for partially oxidizing and substantially completely pyrolizing the input material and a lower layer (68) of tar-free charcoal. The gasification system includes a closed reaction chamber (10) which includes upper and lower portions (14/18). The cross-sectional area of the lower portion (18) is larger than the cross-sectional area of the upper portion (14), the lower portion further including an upper part which overlaps the lower part of the upper portion (14). The lower layer (68) of the gas production bed is supported by a star valve assembly (23) which extends across the cross-sectional area of the lower portion (18). A cone-shaped member (26) extends downwardly from the lower end of the lower portion (18). A shield element (32) extends directly downwardly from the lower end of the lower portion (18) for supporting the gasifier, defining an air chamber (51). A conduit (38) connects the air chamber (51) with an air inlet (47) at the top of the reaction chamber.