放射性废物处理中心蒸发系统优化设计研究

Study on Optimization Design of Evaporator System for Radioactive Waste Disposal Center

对放射性废物处理中心蒸发系统进行简要介绍,针对传统工艺存在问题,以及无法满足新增核设施的放射性废液处理能力等问题,从二次蒸汽除沫方面对蒸发工艺核心设备及系统进行优化设计,如:降低蒸发器初级重力分离段雾沫夹带,内置泡罩塔并利用系统内净化水进行水洗,同时串联丝网除沫器进一步分离雾沫;采用带有高效聚结滤芯的净化器进行高精度净化。经理论验证,该优化设计可在保证废物最小化原则的基础上,有效提高放射性废液的净化能力和去污因子,同时简化系统设备及流程。

In this paper the evaporator system of the radioactive waste disposal center was introduced in brief firstly. Considering the problems of the traditional process such as it is unable to meet the handling capacity for the radioactive wastewater of the newly connected nuclear facilities, the design for the key equipments of the evaporation process and the system in the aspect of secondary steam demisting is optimized. The mist entrainment of the evaporator primary gravity separation segment and the built-in bubble column is reduced, the purified water in the system is used to wash the secondary steam, and the mesh demister is combined to further separate the entrainment. The purifier with high efficiency coalescing filter element is used to purify in high precision. The proposed system can improve the purification and the decontamination factor of radioactive wastewater based on the radioactive waste minimization principle by verifying, and the whole evaporated system and equipments was simplified.