摘要
针对未配套放射性废液固化装置的AP1000核电厂,提出了适用于核电厂废物处理设施产生的超标放射性洗衣废水的非热能处理工艺,即:机械过滤(袋式过滤器)+深床过滤单元(两级活性炭深床柱)+无机离子交换单元(沸石柱)。相比蒸发技术,该工艺能耗低,不产生浓缩液,无需配套废液固化装置。中试研究表明深床过滤单元可去除97.1%的悬浮物和86.5%的COD,同时去除了大部分以悬浮物或胶体形态存在的Fe和Co等核素;无机离子交换单元则去除大部分离子态的Cs以及少量离子态的Fe和Co。系统出水的SS和COD满足GB 18918-2002一级A标准要求,放射性活度浓度低于GB 6249-2011的限值并且低于核电厂的管理限值。
A non-thermal treatment technology, which was adapted to treat radioactive laundry liquid waste in AP 1000 nuclear power plant （NPP） without solidification equipment, was proposed. The process of this technology was based on three units which were mechanical filtration unit （bag filter）, deep-bed filter unit （two stages of activated carbon deep-bed column） and inorganic ion exchange unit （zeolite colunm）. Comparing to evaporation technology which was usually used to treat laundry liquid waste, the advantages of non-thermal treatment technology are low energy consumption, non-concentrated solution produced and no need of solidification equipment. The results of medium scale simulated experiment showed that deep-bed filter unit removed about 97.1% of suspended solids, 86.5% of organics, and most of Fe and Co in the present of suspended particulates or colloids, and ion exchange unit removed most of Cs and a small amount of Fe and Co in the present of ionic states. The SS and COD concentrations of the outlet liquid from the proposal process were satisfied the first A class requirement of GB 18918-2002. The activity concentration of the outlet liquid was satisfied the requirement of GB 6249-2011 and the management limit value of NPP near ocean.
出处
《水处理技术》
CAS
CSCD
北大核心
2016年第9期110-114,120,共6页
Technology of Water Treatment
基金
国家大型先进压水堆核电站重大专项(2014ZX06004005-002)
关键词
放射性洗衣废水
悬浮物
有机物
深床过滤
无机离子交换
radioactive laundry liquid waste
suspended solids
organics
deep-bed filter
inorganic ion exchange
