| 摘要 |
An apparatus for gasifying solid carbonaceous material in a circulating fluidized bed reactor (1). Particles are separated from the product gas at least in two stages so that in the first stage (2), mainly coarser, so-called circulating particles are separated and returned to the reactor. In the second stage (5), fine carbonaceous and ash-containing particulates are separated from the gas and are made to agglomerate at a raised temperature. Coarser particles thus received are returned to the reactor through a return duct (3, 33) together with circulating particles. Agglomeration is effected in a chamber (30), where a fluidized bed (31) composed of coarse particles is maintained. Fine particulate material (38) and oxygen containing gas (39) are introduced into the free upper part of the chamber so as to form a flame (40). The point of the flame penetrates into the fluidized bed. The ash material contained in the fins particulate material melts, and is conducted to the bubbling fluidized bed (31). |
