| 摘要 |
1. A process for treating materials in a fluidized bed with removal of solid products, in a plant comprising a main treatment chamber (1) supplied with material to be treated and having at its base means (12) for forming by the upward circulation of a gas a fluidized bed (4) in which a treatment reaction is performed with the introduction of solid particles capable of agglomeration from a sticking temperature and which is connected via its upper part to a gas/solids separator (2) for recovering the fine particles entrained with the gases and comprising at least one part which can be agglomerated, the separator (2) incorporating an outlet (21) for the purified gases and an outlet (22) for the solids, which is connected to the main treatment chamber (1) via a circuit (3) for recycling the recovered particles into the fluidized bed (4), the fine particles recovered at the outlet of the separator (2) being introduced into a localized zone (53) which is arranged in the path of the recycling circuit (3) and in which a high temperature is produced, higher than the sticking temperature, enabling the particles capable of agglomeration to be removed, only those particles which have been incompletely treated being recycled to the fluidized bed, characterized in that the temperature in the main treatment chamber (1) is regulated to a level lower than the sticking temperature of the products. |
