Procédé et installation pour la transformation thermique de combustibles solides

L'inventions concerne la transformation thermique de combustibles solides possédant une faible teneur en partie organique et peut être utilisée dans l'industrie de transformation de combustibles. La transformation du schiste bitumineux ou de combustibles solides à teneur élevée en cendres comprend le séchage de la matière de base par des gaz de fumée, l'extraction de la phase solide utilisée comme agent caloporteur, la pyrolyse de la matière de base dans le réacteur, la séparation du mélange vapeur-gaz et The invention relates to thermal conversion of solid fuels with a low organic content and can be used in the fuel-processing industry. Conversion of oil shale or high-ash solid fuels comprises flue-gas drying of feedstock, recovering the solid phase as a heat-carrying agent, feedstock pyrolysis in a reactor, separating a gas-vapour mixture from the coke-ash residue in a dust-settling chamber, discharging ash, cooling flue gases, and combustion of the coke-ash residue. An inert material having an ambient temperature is supplied to the outlet of the coke-ash residue ignition chamber. The plant comprises, arranged in series, a reactor, a dust-settling chamber, a flash-process furnace, a heat-carrier cyclone, an ash cyclone, a waste-heat recovery system, an ash-discharge system and a bin for inert material connected to the outlet of the coke-ash residue ignition chamber. The invention allows for a more complete use of the oil shale energy potential and for obtaining ash with a reduced negative effect on the environment, which makes it possible to use the ash for recultivation of quarries resulting from oil shale mining.