电厂脱硫废水软化除硬实验研究  

Experimental Study on Softening and Hardening of Desulfurization Wastewater from Power Plants

作　　者：李俊 杨虎君 王灵芝 辛举贤 彭涛 王黎 张松 LI Jun;YANG Hu-jun;WANG Ling-zhi;XIN Ju-xian;PENG Tao;WANG Li;ZHANG Song(WELLE Environmental Technology Group Co.Ltd.,Changzhou 213000,China)

机构地区：[1]维尔利环保科技集团股份有限公司,江苏常州213000

出　　处：《安徽化工》2024年第5期141-144,149,共5页Anhui Chemical Industry

摘　　要：针对燃煤电厂脱硫废水硬度和硫酸根浓度高的特点,在其后续处理单元中易出现结垢的问题,拟采用Ca(OH)_(2)/Na_(2)CO_(3)+微滤处理工艺对燃煤电厂硫废水进行预处理以降低硫酸根浓度,考查了pH、钙离子、镁离子、SO_(4)^(2-)去除率和碱度等相关参数对硬度去除和硫酸根去除率的影响,结果表明,一级反应池pH最优控制在11.2及以上,二级反应pH在10.45~11.76之间,浓缩池SO_(4)^(2-)的浓度降低至1950.9mg/L,去除率可达66.7%,总硬度低于检出限,满足低于40 mg/L的预期指标。研究结果为燃煤电厂脱硫废水全量处理提供了一定的技术指导。In view of the high hardness and sulfate concentration of desulfurization wastewater from coal-fired power plants,and the problem of fouling in its follow-up treatment unit,this experiment intends to use Ca(OH)_(2)/Na_(2)CO_(3)+microfiltration treatment process to pretreat sulfur wastewater from coal-fired power plants to reduce sulfate concentration,and the effects of pH,calcium ions,magnesium ions,SO_(4)^(2-)removal rate and alkalinity on hardness removal and sulfate removal rate are investigated.The pH of the primary reaction tank was optimally controlled at 11.2 and above,the pH of the secondary reaction was between 10.45~11.76,the concentration of SO_(4)^(2-)in the concentration tank was reduced to 1950.9 mg/L,the removal rate could reach 66.7%,and the total hardness was lower than the detection limit,which met the expected index of less than 40 mg/L.The research results will provide some technical guidance for the full treatment of desulfurization wastewater in coal-fired power plants.

关 键 词：脱硫废水 硫酸根 预处理 膜处理 

分 类 号：X773[环境科学与工程—环境工程]