低温热法浓缩工艺(LTE)处理高盐废水工业化试验研究  

Industrial Test Research on Low-temperature Thermal Concentration Process(LTE)for the Treatment of High-salt Wastewater

作　　者：郭红兵[1] 李瑞基[2] 李瑞杰 彭建华[1] 闫刚刚[2] 孙文亮[1] 陈宋璇[1] 马磊[2] GUO Hong-bing;LI Rui-ji;LI Rui-jie;PENG Jian-hua;YAN Gang-gang;SUN Wen-liang;CHEN Song-xuan;MA Lei

机构地区：[1]中国恩菲工程技术有限公司,北京100038 [2]金川集团股份有限公司,甘肃金昌737104

出　　处：《有色冶金节能》2021年第4期49-53,共5页Energy Saving of Nonferrous Metallurgy

摘　　要：有色冶炼厂含盐废水具有含盐量高、成分复杂、易结垢等特点,常规处理技术存在能耗高、处理能力有限、运行成本高、设备内部易结垢等问题,缺乏绿色、高效、低成本处理技术与装置。低温热法浓缩技术(LTE)以乏汽为热源,适用于高盐、高钙、高氨氮废水处理。本文以某有色冶炼厂高盐废水(TDS>100 g/L)为研究对象,建立了处理能力10 m^(3)/d的低温热法浓缩工艺设备,并进行了中试。中试结果表明:单效LTE蒸发浓缩设备处理能力0.32~0.45 m^(3)/h,蒸发量为0.20~0.31 m^(3)/h,产水率大于60%,且产水电导率稳定,小于60 us/cm。产水品质高,达到软化水标准。低温热法短流程技术实现了废水高品质资源化,具有运行成本低、换热管不结垢等优势。Salt-bearing wastewater from non-ferrous smelter is characterized by a high salt content,complex composition and easy scaling,etc.With a lack of green,efficient and low-cost treatment technology and device,the conventional treatment technology confronts the problems of high energy consumption,limited processing capacity,high operation cost and easy scaling inside the equipment,etc.LTE technology,with exhaust steam as the heat source,is suitable for high salt,high calciumand high ammonia nitrogen waste water treatment.This paper studied the high-salt wastewater(TDS>100 g/L)from a non-ferrous smelter and built a set of LTE equipment with a treatment capacity of 10 m^(3)/d,and the pilot test was done.The pilot test result showed that the single-effect LTE evaporation and concentration equipment boasted a processing capacity of 0.32-0.45 m^(3)/h,the evaporation capacity was 0.20-0.31 m^(3)/h,water yield was larger than 60%and the conductivity of yielded water was stable and less than 60 us/cm.The yielded water with a high quality meet the standard of softened water.LTE technology realizes the high-quality recycling of wastewater,characterized by a low operation cost and anti-scale of heat exchange pipe and other advantages.

关 键 词：高盐废水 低温热法浓缩 机械式蒸汽再压缩 多效蒸发 电渗析 反渗透 纳滤 

分 类 号：X703[环境科学与工程—环境工程]