MÉTODO E DISPOSITIVO PARA A GASEIFICAÇÃO DE FLUXO ARRASTADO DE COMBUSTÍVEIS SÓLIDOS SOB PRESSÃO

摘要

The invention relates to a gasification reactor (1) and associated method for the entrained-flow gasification of solid fuels under pressure. The reactor essentially consists of a pressure vessel (4) that can be cooled and an inner jacket (7) that is equipped with a heat shield. At least one crude gas outflow (8) is located at the upper end of the cylindrical pressure vessel and at least one bottoms withdrawal outlet (30) is located at the lower end, the pressure vessel having at least enough space for a moving bed (13), an entrained flow (11) that circulates internally above the surface of the moving bed and a buffer zone (3) situated above said entrained bed. Feed connections for the solid fuels (15) and gasification agent nozzles for the supply of first gasification agents (16) are situated at a height of between approximately 1 and 3 meters above the surface of the moving bed, said gasification agent nozzles being designed to inject the first gasification agents into the entrained flow in such a way that a hot central upward flow and a "cold" downward wall flow are formed. At least one feed device for second gasification agents (28) is located at the bottoms withdrawal outlet.