放射性废物桶内干燥整备研究进展

桶内干燥具有很高的减容比,已经逐渐被国外核电站用来处理放射性废液,为我国核电废物贮存和处理提供了一条新的途径。详细介绍了电加热、热风加热和微波加热3种桶内干燥装置的研究应用实例,主要内容包括干燥装置的过程控制、干燥产量(蒸发速率和进料速率)、干燥产物的含水率和减容比。通过分析对比得出,电加热和热空气加热型装置投入产出高,但仅适合流动和传热好的废物整备;微波加热型装置前期投入大,适用却更广,尤其适合底泥等一类含有有机物质的废物。

Research Progress of Radioactive Waste In-drum Drying

In-drum drying technology,as a volume reduction technology,has been used for conditioning radioactivity wastes in NPPs abroad.Research and application practice of in-drum drying equipments,including electrical heating,hot air heating,and microwave heating devices,were introduced from the aspects of process control,drying output,water content,and volume reduction rate.It was concluded from analysis that electrical heating and hot air heating devices has higher input-output ratio,which is only suitable for flowing and thermal conductive waste equipment;although microwave heating device has higher initial investment,it has wide application range,especially applicable for organic containing waste such as base mud.