Process for the gasification of carboniferous material in solid, pulverulent or even lump form

Claim 1

Process for the gasification of carbonaceous material in solid form, with at least oxygen, at pressures from 1 to approximately 80 bar in a fluidized bed, the process comprising the steps of: arranging two fluidized bed gasification stages above each other in a reaction chamber and connecting said two stages to each other; supplying carbonaceous material and oxygen to the lower fluidized bed and supplying gasifying agent to the upper fluidized bed,; separating solids containing pure substance and ash from gas leaving the upper fluidized bed; supplying the separate solids to at least one flue-dust gasification chamber via a gasification burner said flue-dust gasification chamber being arranged substantially entirely inside said reaction chamber and extending from a location between said lower and upper fluidized beds downwardly into and below the upper surface of the lower fluidized bed and with the upper portion of the flue-dust gasification chamber being connected to a mounted gasification burner located outside the reaction chamber said flue-dust gasification chamber having a size for allowing adequate time for both carbon conversion and ash melting; at least one flue-dust gasification chamber releasing as products gas and liquid slag into the lower fluidized bed; a direct heat release taking place from said products to the lower fluidized bed; the liquid slag solidifying in the fluidized bed and precipitating at the bottom as a granulate into a fixed bed gasification stage underneath the fluidized bed stages.