电厂湿法脱硫废水高倍浓缩中试研究  

Pilot Scale Study on High-power Concentration of Wet DesulfurizationWastewater from Power Plant

作　　者：张泉 高然 阳芳 赵剑锋 徐文军 吴来贵 ZHANG Quan;GAO Ran;YANG Fang;ZHAO Jianfeng;XU Wenjun;WU Laigui(Shenzhen Energy Comprehensive Resource Development Co.,LTD.,Shenzhen 518031,China)

机构地区：[1]深圳能源资源综合开发有限公司,广东深圳518031

出　　处：《水处理技术》2023年第6期128-132,共5页Technology of Water Treatment

摘　　要：本文综合阐述了采用微滤-纳滤-高压反渗透-超高压反渗透组合工艺浓缩燃煤电厂湿法脱硫废水的工艺流程、参数等。以连续运行方式考察了各级膜的浓缩性能和污染物的截留情况,结果表明膜组合工艺能够有效截留水中的溶解性污染物,且产水水质稳定达到电厂回用水要求。脱硫废水中的氯离子等盐分浓缩3.5倍,使进入后续蒸发工艺的水量减少60%以上,并有效分离水中的二价盐和单价盐,得到含有高纯度NaCl的浓盐水。浓缩液的总溶解性固体(TDS)达到100000mg/L以上,替代蒸发浓缩工艺实现了脱硫废水的高倍浓缩。This paper presents a comprehensive description of the process flow,parameters,etc.for concentrating wet desulfurization wastewater from coal-fired power plants using a combined microfiltration-nanofiltration-high-pressure reverse osmosis-ultra-high pressure reverse osmosis process.The concentration performance and contaminant retention of each membrane stage were investigated in continuous operation.The results show that the membrane combination process can effectively retain dissolved pollutants in the water,and the produced water quality is stable to meet the requirements of power plant reuse water.The chloride ions and other salts in the desulfurization wastewater are concentrated by 3.5 times,which reduces the amount of water entering the subsequent evaporation process by more than 60%and effectively separates the divalent and monovalent salts in the water to obtain concentrated brine containing high purity NaCl.The total dissolved solids(TDS)of the concentrate reached over 100000 mg/L,replacing the evaporation concentration process to achieve high concentration of desulfurization wastewater.

关 键 词：超高压反渗透 膜浓缩 脱硫废水 

分 类 号：X703.1[环境科学与工程—环境工程]