有色金属行业含油高盐废水的资源化处理研究  

Research on Resource Treatment of Oily and High-salt Wastewater in Non-ferrous Metal Industry

作　　者：黄松宇[1] 于淼[1] HUANG Songyu;YU Miao(China ENFI Engineering Corporation,Beijing 100038,China)

机构地区：[1]中国恩菲工程技术有限公司,北京100038

出　　处：《绿色矿冶》2024年第6期35-40,共6页Sustainable Mining and Metallurgy

摘　　要：某有色金属冶炼企业硫酸铜生产中的萃余液为含油高盐废水,其石油类浓度为92.5 mg/L,TOC浓度为89.5 mg/L,主要盐类为硫酸钠。本文选择气浮除油法作为预处理工艺,并利用固定床活性炭吸附法对该废水进行除油处理。试验结果表明,气浮法除油效果有限,石油类污染物的去除率为30.9%,TOC去除率为33.1%,仍有大部分油类残留;在固定床活性炭吸附法中,升流式进水方式有着更高的除油率,石油类去除率可达到80%左右,设置进水流速选择为500~1000 mL/h时可以获得较优的处理效果和较高的处理效率,且从吸附开始2 h后至吸附结束其出水效果稳定;对除油后废水进行分离提取,可得到无水硫酸钠(元明粉),经分析其品质接近于国标Ⅰ类一等品。The raffinate in the production of copper sulfate in a non-ferrous metal smelting enterprise is a kind of oily high-salt wastewater.The concentration of petroleum is 92.5 mg/L,the concentration of TOC is 89.5 mg/L,and the main salt is sodium sulfate.In this paper,the air flotation oil removal method was selected as the pretreatment process,and the fixed bed activated carbon adsorption method was used to remove the oil from the wastewater.The results show that the oil removal effect of air flotation method is limited,the removal rate of petroleum pollutants is 30.9%,the removal rate of TOC is 33.1%,and there are still most of the oil residues.In the fixed bed activated carbon adsorption method,the up-flow water inlet method has a higher oil removal rate,which can reach about 80%.When the water flow rate is set to 500~1000 mL/h,the better treatment effect and higher treatment efficiency can be obtained,and the effluent effect is stable from^(2) h after the adsorption to the end of the adsorption.Anhydrous sodium sulfate(sodium sulfate)can be obtained by separating and extracting the wastewater after oil removal,and its quality is close to the first-class product of national standard I by analysis.

关 键 词：高盐废水 气浮除油 活性炭吸附 含油废水 低温热法浓缩 元明粉 

分 类 号：X758[环境科学与工程—环境工程]