Method and device for drying radioactive concentrates vaporizing facilities aguasresiduales

摘要

Drying radioactive waste water concentrates from evaporators to produce a dried product of low residual moisture by (a) preheating a waste water concentrate with a solids content of at most 20% by weight to a temperature of 50 DEG -70 DEG C., (b) passing the preheated concentrate with a solids content of at most 20% by weight into a two-cylinder drier at the rate of 10 to 20 liters per square meter of usable cylinder surface per hour, (c) maintaining the cylinder temperature between about 160 DEG to 210 DEG C., (d) retaining the concentrate in the drier for a residence time of 7 to 18 seconds on the cylinder to produce a dried product of low residual moisture on the cylinder surface, and (e) discharging the dried product of low residual moisture from the cylinder surface.