燃煤电厂废水综合治理近零排放解决方案探讨  

Discussion on zero emission solution for comprehensive treatment of wastewater from a coal-fired power plant

作　　者：刘世杰[1,2,3] 邝文斌 李锋 朱冬生 涂爱民[1,2,3] LIU Shijie;KUANG Wenbin;LI Feng;ZHU Dongsheng;TU Aimin(Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou 510640,China;CAS Key Laboratory of Reneuxible Energy,Guangzhou 510640,China;Guangdong Provincial Key Laboratory of New and Renevuable Energy Research and Development,Guangzhou 510640,China;Foshan Hengyi Thermal Power Co.,Ltd.,Foshan 528100,China)

机构地区：[1]中国科学院广州能源研究所,广州510640 [2]中科院可再生能源重点实验室,广州510640 [3]广东省新能源和可再生能源研究开发与应用重点实验室,广州510640 [4]佛山恒益热电有限公司,佛山528100

出　　处：《给水排水》2021年第9期69-75,80,共8页Water & Wastewater Engineering

基　　金：广东省科技专项项目(2020ST008);佛山高新区科技创新项目(2020197000618)。

摘　　要：对某燃煤电厂实现废水近零排放目标存在的主要问题进行了分析,对废水来水与回用水不平衡问题提出了综合治理解决方案。提出采用部分辅机冷却水回流来解决辅机冷却用水量与全厂补水量的不平衡问题并进行了可行性论证;综合治理方案实施后电厂单位发电用水量将降低19%,针对该厂末端高盐废水蒸干系统存在的问题,结合目前国内外几种主要高盐废水近零排放工艺的技术特点,提出了两种解决方案并进行了工程建设投资及运行费用对比分析,得出了优先选用低温烟气旁路蒸发浓缩方案的结论。The main problems in the realization of zero discharge target of a coal-fired power plant were analyzed.A comprehensive treatment solution was proposed for the imbalance of wastewater and water reuse.It is proposed to use some auxiliary machine cooling water return method to solve the imbalance between the auxiliary machine cooling water consumption and the whole plant hydration demand,and the feasibility of the solution is demonstrated.After the implementation of the comprehensive treatment plan,the power consumption per unit of the power plant will be reduced by 19%.In view of the problems existing in the high-salt wastewater evaporation system at the end of the comprehensive treatment of wastewater from the plant,combined with the technical characteristics of several major high-salt wastewater zero-emission processes at home and abroad,two solutions were proposed and the engineering construction investment and operating costs were compared.The analysis concluded that the low-temperature flue gas bypass evaporation enrichment scheme was preferred.

关 键 词：高盐废水 综合治理 近零排放 机械蒸汽再压缩 烟道蒸发 梯级利用 

分 类 号：X703.1[环境科学与工程—环境工程]