VERFAHREN UND EINRICHTUNG ZUM WASCHEN EINES ABGASSTROMES

摘要

The exhaust gas stream from a wet process cement kiln is scrubbed by introducing into the stream as it exits from the kiln and enters a downstream dust collector a finely divided mist. The mist comprises an aqueous solution of highly soluble alkaline material in only sufficient quantity in relation to the concentration of oxides of sulphur and nitrogen in the steam instantly to neutralise the acids formed by the reaction of the water content of the mist therewith while completely evaporating the solution to produce dry solid particulate salts capable of collection with the dust in the collector, and while causing minimal cooling of the exhaust stream. <IMAGE>