Waste incineration fly ash washing filtrate treatment system

The utility model discloses a waste incineration fly ash washing filtrate treatment system which comprises a pretreatment unit, a decalcification unit and a fine treatment unit, the decalcification unit comprises at least two stages of decalcification devices, and the first stage of decalcification device uses sodium sulfate as a decalcification agent. According to the waste incineration fly ash washing filtrate treatment system, most calcium ions in the filtrate are converted into calcium sulfate precipitates, the hardness removal cost can be reduced, meanwhile, the generated calcium sulfate precipitates can be secondarily utilized, and maximum utilization of resources is achieved. 本申请公开了一种垃圾焚烧飞灰水洗滤液处理系统，包括预处理单元、脱钙单元和精处理单元，脱钙单元包括至少两级脱钙装置，其中第一级脱钙装置使用硫酸钠作为脱钙药剂。本申请的垃圾焚烧飞灰水洗滤液处理系统将滤液中绝大部分的钙离子转化为硫酸钙沉淀，能够实现除硬成本降低的同时，其产生的硫酸钙沉淀能够二次利用，实现资源最大化利用。