中国电力 ›› 2018, Vol. 51 ›› Issue (12): 175-179.DOI: 10.11930/j.issn.1004-9649.201706196

• 节能与环保 • 上一篇    下一篇

燃煤电厂湿法烟气脱硫废水处理技术研究进展

聂向欣1, 郑宗明1, 崔孝洋1, 陆强1, 董长青1, 赵锦2   

  1. 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
  • 收稿日期:2017-06-29 修回日期:2017-12-20 出版日期:2018-12-05 发布日期:2018-12-13
  • 作者简介:聂向欣(1991-),男,硕士研究生,从事能源清洁高效利用方面的研究,E-mail:xiangxinnie@126.com;郑宗明(1974-),男,副教授,从事新能源开发利用与节能环保方面的研究,E-mail:zmzheng@ncepu.edu.cn

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

NIE Xiangxin1, ZHENG Zongming1, CUI Xiaoyang1, LU Qiang1, DONG Changqing1, ZHAO Jin2   

  1. 1. National Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, Beijing 102206, China;
    2. State Grid Energy Saving Service Co., Ltd., Beijing 100052, China
  • Received:2017-06-29 Revised:2017-12-20 Online:2018-12-05 Published:2018-12-13

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。

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

Abstract: The treatment of desulphurization wastewater is one of the challenges hindering further water saving in coal-fired power plants. In this paper, the typical treatment technologies, including triple box treatment, membrane-based treatment, thermal-based treatment and electrolytic treatment are introduced while the characteristics of limestone/gypsum wet desulphurization wastewater are discussed. The future treatment technologies of desulfurization wastewater should integrate pretreatment, concentration and resource utilization process etc. In particular, pretreatment plays an indispensible role in the removal of dissolved calcium and magnesium 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 heat transfer equipment or resistance increase of electrolytic bath can be avoided in the process of concentration and resource utilization by pretreatment. In order to create conditions for follow-up zero discharge treatment, it is suggested that the pretreatment level of triple box treatment should be strengthened from the view of turbidity reduction and water softening.

Key words: coal-fired power plants, deep water saving, desulphurization wastewater, pretreatment, triple box treatment, zero discharge

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