Apparatus and method for dissolution reaction

Abstract

When fly ash is added to a cement kiln to materialize it after being desalinated by washing, scale is prevented from growing in a dissolution reaction apparatus depositing calcium-containing compounds dissolved in slurry, and the fly ash is effectively used as a cement material. A dissolution reaction apparatus according to the invention comprises: a dissolution tubfor dissolving powder material, a wet dust collectorfor collecting powder material and mist while reacting slurry S in the dissolution tubwith gas G and returning the collected powder material and mist to the dissolution tub. A second wet dust collectorcan be provided for collecting powder material and the like accompanying to the gas G discharged from the wet dust collector, and both the wet dust collectorscan be vertical type and mounted independently with each other on the dissolution tub. The slurry S and the gas G can react with each other with parallel flow by feeding the slurry S and the gas G to an upper portion of the first wet dust collector, or the powder material and the like accompanying to the gas G may be collected with counter flow by feeding the gas G discharged from the dissolution tubto a lower portion of the second wet dust collector