燃煤电厂湿法烟气脱硫废水处理技术研究进展  

Research Progress on the Treatment Technologies of Wet Flue Gas Desulfurization Wastewater in Coal-fired Power Plants

作　　者：聂向欣 郑宗明[1] 崔孝洋 陆强[1] 董长青[1] 赵锦 NIE Xiangxin;ZHENG Zongming;CUI Xiaoyang;LU Qiang;DONG Changqing;ZHAO Jin(National Engineering Laboratory for Biomass Power Generation Equipment,North China Electric Power University,Beijing 102206,China;State Grid Energy Saving Service Co.,Ltd.,Beijing 100052,China)

机构地区：[1]华北电力大学生物质发电成套设备国家工程实验室,北京102206 [2]国网节能服务有限公司,北京100052

出　　处：《中国电力》2018年第12期175-179,共5页Electric Power

摘　　要：脱硫废水处理是燃煤电厂深度节水的难点之一。在讨论石灰石–石膏湿法脱硫废水特点的同时,介绍了包括三联箱处理法、膜处理法、热处理法及电解处理法在内的国内外典型脱硫废水处理技术,指出高效规模化的脱硫废水处理技术应是包括预处理、浓缩和资源化等过程的系统集成技术。预处理对溶解态钙镁离子、胶体颗粒物和无机垢成分的脱除起着至关重要的作用,可以避免浓缩及资源化过程中因滤膜极化、滤膜污染、换热设备结垢、电解槽电阻增大等现象造成的膜渗透通量下降、传热及电解效率降低等问题。建议从降浊和软化的角度强化三联箱法的预处理水平,为后续零排放处理创造条件。The treatment of desulphurization wastewater is one of the challenges hindering further water saving in coal-fired powerplants. In this paper, the typical treatment technologies, including triple box treatment, membrane-based treatment, thermal-basedtreatment and electrolytic treatment are introduced while the characteristics of limestone/gypsum wet desulphurization wastewaterare discussed. The future treatment technologies of desulfurization wastewater should integrate pretreatment, concentration andresource utilization process etc. In particular, pretreatment plays an indispensible role in the removal of dissolved calcium andmagnesium ions, colloidal particles and inorganic scale components. Specifically, problems such as decrease of permeation flux,decline of heat transfer efficiency and electrolytic efficiency due to polarization of membrane, fouling of membrane, scaling of heattransfer equipment or resistance increase of electrolytic bath can be avoided in the process of concentration and resource utilizationby pretreatment. In order to create conditions for follow-up zero discharge treatment, it is suggested that the pretreatment level oftriple box treatment should be strengthened from the view of turbidity reduction and water softening.

关 键 词：燃煤电厂 深度节水 脱硫废水 预处理 三联箱法 零排放 

分 类 号：X703[环境科学与工程—环境工程] TM621.9[电气工程—电力系统及自动化]