Process and plant for the thermal treatment of fine-grained solids

摘要

A process for at least one of a chemical and a physical treatment of fluidizable substances in a reactor. The process includes introducing a hot gas into an interior of the reactor through a gas supply tube and cooling at least one of the hot gas and the gas supply tube with a coolant. The cooling is performed by contacting the hot gas with the coolant so as to provide a temperature of a wall of the gas supply tube at least 50° C. lower than a temperature of the gas at an inlet of the gas supply tube facing away from the interior of the reactor.

主权项

1. A process for at least one of a chemical and a physical treatment of fluidizable substances in a reactor, the process comprising:
introducing a hot gas into an interior of the reactor through a gas supply tube; and cooling the hot gas and the gas supply tube with a gas coolant, wherein the cooling is performed by providing the coolant to a cooling tube concentrically surrounding the gas supply tube so as to cool the gas supply tube in a region of the cooling tube and by directly contacting the hot gas in the gas supply tube with the coolant so as to provide a temperature of a wall of the gas supply tube at least 50° C. lower than a temperature of the gas at an inlet of the gas supply tube facing away from the interior of the reactor, wherein the reactor is a stationary fluidized bed reactor with a tuyère bottom, the stationary fluidized bed being formed annularly around the gas supply tube in the reactor, a gas distributor being disposed below the stationary fluidized bed, the coolant being passed through the cooling tube into the gas distributor and into the stationary fluidized bed as fluidizing gas via the tuyère bottom.