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浮选法与絮凝法处理含油废水

光博环保公司 2019-01-10

  FUXUANFA:FUXUANFASHIJIANGKONGQIYIWEIXIAOQIPAOXINGSHIZHURUSHUIZHONG,SHIWEIXIAOQIPAOYUZAISHUIZHONGXUANFUDEYOULINIANFU,YINQIMIDUXIAOYUSHUIERSHANGFU,XINGCHENGFUZHACENGCONGSHUIZHONGFENLI。FUXUANFAYOUYUZHUANGZHICHULILIANGDA、CHANSHENGWUNILIANGSHAOHEFENLIXIAOLVGAODENGYOUDIAN,ZAIHANYOU CHULIFANGMIANJUYOUJUDADEQIANLI。MUQIANFUXUANZUICHANGYONGDEFANGFASHIRONGQIFUXUANFA、YELUNFUXUANFAHESHELIUFUXUANFADENG。RONGQIFUXUANFAHEYELUNFUXUANFACUNZAITINGLIUSHIJIANZHANG、ZHUANGZHIZHIZAOHEWEIXIUMAFAN、NENGHAOGAODENGQUEDIAN。XIANGBIZHIXIA,SHELIUFUXUANFABUDANNENGJIESHENGDALIANGNENGHAO,HAIJUYOUCHANSHENGQIPAOXIAO、ZHUANGZHIANZHUANGFANGBIAN、CAOZUOANQUANDENGTEDIAN,YINERJUYOULIANGHAODEYANJIUHEYINGYONGQIANJING。YUTIGAOFUXUANXIAOGUOKETOUJIAFUXUANJI,FUXUANJIYIFANGMIANJUYOUPORUZUOYONGHEQIPAOZUOYONG,LINGYIFANGMIANHAIYOUXIFUJIAQIAOZUOYONG,KEYISHIJIAOTILIZIJUJISUIQIPAOYIQISHANGFU。LINGWAI,ZAIYUANYOUFUXUANZHUANGZHIDEJICHUSHANGJINXINGGAISHANYEKEJINYIBUTIGAOCHUYOUXIAOLV,RUJIANGFUXUANCHIJIEGOUYOUFANGXINGGAIWEIYUANXINGJIANSHAOLESIJIAOHUOCAIYONGYILIUYANBANPAICHUFUZHADENG。JIANGRONGQIFUXUANYUTAFUXUANJIEHEZAIYIQI,ZAITAFENLIXITONGZHONGCHULIHANYOUWUSHUI,HUODELEHENGAODEYOUSHUIFENLIXIAOLV。KAOCHALEZAIRONGQIFUXUANZHUANGZHIZHONGTIANJIAHUOXINGTANDUICHULIXINGNENGDEYINGXIANG。JIEGUOFAXIAN,DANGHUOXINGTANHANLIANGZAI50~150mg/LSHI,CODQUCHULVCONG16%~64%SHENGDAO72%~92.5%,BODQUCHULVCONG27%~70%TIGAODAO76%~94%,CHULIHOUBODHECODZHIFENBIEJIANGDAO45%~95mg/LHE110%~200mg/L。

  絮凝法:近年来,絮凝技术由于其适应性强、可去除乳化油和溶解油以及部分难以生化降解的复杂高分子有机物的特点而被广泛应用于含油污水的处理。但是,由于油田含油污水成分复杂,对于特定处理对象选用的絮凝剂无法在理论上作出预测,则必须通过大量的实验来筛选。常用的絮凝剂主要有无机絮凝剂、有机絮凝剂和复合絮凝剂三大类。无机高分子絮凝剂(如聚合氯化铝、聚合硫酸铁等)较低分子量无机絮凝剂处理效果好,且用量少,效率高,但存在产生的絮渣多、不易后续处理的缺点。有机高分子絮凝剂由于价格昂贵,难以大量推广使用,而主要用做其它方法的助剂。研究发现,将无机絮凝剂和有机絮凝剂复合投用可以明显改善处理效果。这是由于有机絮凝剂中阳离子对污水中的乳化油滴起到了电荷中和及压缩双电层的作用,促使乳化油滴进一步破乳析出,而且有机絮凝剂有很长的分子链,能在经凝聚作用形成的胶体颗粒间进行架桥,形成大而坚韧的絮凝体,从而改善絮凝体性能。复合絮凝剂的性能好坏取决于絮凝体的形成状态及其物质的量。因此,通过优化复合絮凝剂来提高处理效率并降低成本成为该领域的重要研究内容。使用PZSS(聚合硅酸锌)和A-PAM(聚丙烯酰胺阴离子)复合絮凝剂处理含油污水,油去除率高达99%,悬浮固体值小于5mg/L,满足回注水要求。但该方法存在药剂的投放量大、价格昂贵、后续处理困难等问题而影响了其在工业上推广使用。
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