随着国家对环境保护的日益重视,火电行业正在大规模开展废水综合治理改造。火电厂排污许可证一般不允许脱硫废水外排,脱硫废水由于含盐量、氯离子、硬度等浓度高,厂内无法直接综合利用,火电厂需建设废水零排放装置满足环保要求,火电厂废水零排放是火电厂废水综合治理改造的难点。
近几年来已有上百家火电厂完成全厂节水与废水综合治理改造可行性研究,多数电厂均按废水零排放规划,已建设完成的废水零排放系统也快速增长。废水零排放系统多采用膜法浓缩、热法浓缩、蒸发结晶固化、烟气余热干燥等新技术,缺乏统一的性能验收标准,不利于工程项目的验收和评估。火电厂废水零排放装置性能验收导则可为废水零排放装置的性能验收提供指导,满足当前脱硫废水深度治理的需求。因此,编制火电厂脱硫废水零排放处理装置验收导则是十分必要的。
9 月 11 日,《火力发电厂高盐废水零排放工程技术指南》(征求意见稿)及编制说明面向社会公开征求意见。
本标准发布后,可为火电厂高盐废水零排放处工程提供技术依据。建议标准发布后,作为一种推荐标准实施,在行业主管部门、发电公司、设计院、研究院、工程公司等相关单位进行广泛宣贯。
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