CLEANING METHOD, PROCESSING METHOD, CLEANING DEVICE, AND PROCESSING DEVICE FOR FLY ASH

摘要

PROBLEM TO BE SOLVED: To provide a cleaning method, a processing method, a cleaning device, and a processing device for fly ash, by which the number of instruments contaminated by radioactive cesium can be reduced and also cleaning efficiency can be improved, when cleaning and processing the fly ash.SOLUTION: A cleaning method for fly ash includes the steps of: eluting radioactive cesium by mixing fly ash containing the radioactive cesium with water; performing solid-liquid separation for eluate acquired in an eluting step by using a filter press; supplying water to dewatered cake in the filter press, acquired in a solid-liquid separation step; and performing solid-liquid separation for the dewatered cake added with water in a supplying step by using the filter press. In the supplying step, the water having volume of three or more to nine or less times of volume of the dewatered cake is supplied.SELECTED DRAWING: Figure 1