工业水处理 ›› 2022, Vol. 42 ›› Issue (6): 193-197. doi: 10.19965/j.cnki.iwt.2021-0896

• 工程实例 • 上一篇    下一篇

燃气电厂废水零排放工程应用与研究

尹力(), 岳春妹, 费剑影   

  1. 上海明华电力科技有限公司,上海 200090
  • 收稿日期:2022-04-15 出版日期:2022-06-20 发布日期:2022-06-22
  • 作者简介:

    尹力(1990— ),硕士,高级工程师。E-mail:

Research and application of wastewater zero discharge process in gas power plant

Li YIN(), Chunmei YUE, Jianying FEI   

  1. Shanghai Minghua Electric Power Science Co. ,Ltd. ,Shanghai 200090,China
  • Received:2022-04-15 Online:2022-06-20 Published:2022-06-22

摘要:

结合燃气电厂特性和废水情况,实施了针对燃气电厂的废水零排放处理工程:苦咸水反渗透+一体化澄清器+纳滤+电渗析/海水反渗透+次氯酸钠发生器。经处理,90%以上的废水制成了优质淡水,回用水电导率小于120 μS/cm,优于电厂取水水质;浓缩后的高盐水经电解制成次氯酸钠,该次氯酸钠可替代市售次氯酸钠用于电厂循环水杀菌;本工程无其他污染物外排,仅在澄清器输出污泥。该工程稳定运行1 a有余,期间未出现设备故障、膜污堵等问题。膜正常清洗周期为0.5 a,发生器正常清洗周期为1 a,维护工作和清洗频率均符合预期要求,实现了燃气电厂内废水的资源化利用。

关键词: 废水零排放, 燃气电厂, 次氯酸钠, 膜处理

Abstract:

According to the characteristics of gas-fired power plant and wastewater quality,the zero discharge treatment process(brackish water reverse osmosis concentration + integrated clarifier + nanofiltration + electrodialysis/seawater reverse osmosis+sodium hypochlorite generator) for gas-fired power plant was proposed and implemented. After treatment,more than 90% of the wastewater was made into high-quality fresh water,and the conductivity of recycled water was less than 120 μS/cm,better than the water intake quality of the power plant. The concentrated high salt water was electrolyzed into sodium hypochlorite. It was demonstrated that the sodium hypochlorite could replace the commercial sodium hypochlorite for sterilization of circulating water in power plant. No other pollutants were discharged,and only sludge was exported from the clarifier. The project had operated stably for more than one year,during which no equipment failure,membrane fouling or other problems occurred. The normal cleaning cycle of membrane was half year,and the normal cleaning cycle of generator was one year. The maintenance work and cleaning frequency met the expected requirements,so as to realize the wastewater utilization in the gas power plant.

Key words: waste water zero discharge, gas power plant, sodium hypochlorite, membrane treatment

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