| 摘要 |
The present invention relates to a method for removing gaseous pollutants from exhaust gases, in which the gaseous pollutants react with a fine-grained reactant by forming solids in a fluidized-bed reactor (2), and to a corresponding plant. To achieve low pollutant concentrations in the clean gas with an almost stoichiometric consumption of reactant, it is proposed to introduce the exhaust gas from below through a preferably central gas supply tube ( 20 ) into a mixing chamber ( 21 ) of the reactor ( 2 ), the gas supply tube ( 20 ) being at least partly surrounded by a stationary annular fluidized bed ( 22 ) of reactant, which bed is fluidized by supplying fluidizing gas, and to adjust the the gas velocities of the exhaust gas and of the fluidizing gas for the annular fluidized bed ( 22 ) such that the Particle-Froude-Numbers in the gas supply tube ( 20 ) are between 1 and 100, in the annular fluidized bed ( 22 ) between 0.02 and 2, and in the mixing chamber ( 21 ) between 0.3 and 30. |
