煤矿矿井水零排放处理技术与应用
发布时间:2018-01-19 11:23
本文关键词: 高矿化度矿井水 浓缩处理 蒸发结晶 矿井水零排放 出处:《煤炭科学技术》2017年11期 论文类型:期刊论文
【摘要】:为了解决我国西部大型煤炭基地生产过程中面临的水资源紧缺及高矿化度矿井水零排放难题,对矿井水零排放工艺系统中的净化处理、深度处理、浓缩处理及蒸发结晶处理单元进行了技术研究与工程应用。结果表明,对于溶解性总固体TDS质量浓度≤5 000 mg/L的矿井水净化处理采用混凝澄清过滤工艺,深度处理采用苦咸水反渗透(BWRO)工艺,浓缩处理采用BWRO+碟管反渗透(DTRO)工艺,蒸发结晶采用多效蒸发(MED)工艺具有优势。采用上述工艺系统处理TDS质量浓度为1 900~2 400 mg/L的矿井水,浓缩处理后高浓盐水TDS质量浓度≥90 000 mg/L,系统回收率≥96.5%,最终出水TDS质量浓度≤300 mg/L;蒸发结晶单元分离出硫酸钠和氯化钠,满足工业盐标准要求,可作为化工原料利用;全系统综合运行费用约为7.89元/t水;整个工艺运行稳定,对水质变化耐受性好,处理效果佳。
[Abstract]:In order to solve the problem of water shortage and zero discharge of high salinity mine water in the production process of large coal base in western China, the purification and advanced treatment of zero discharge process system of mine water are carried out. The technical research and engineering application of concentration treatment and evaporative crystallization treatment unit have been carried out. The results show that. For mine water purification with dissolved total solid TDS concentration 鈮,
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