炼油废水污泥脱水工艺条件的优化  

Optimization of Process Conditions for Refinery Wastewater Sludge Dewatering

作　　者：路建萍[1] 孙根行[1] 孙绪博 郝新宇 白琴 谢萍 

机构地区：[1]陕西科技大学废水资源化研究所,陕西西安710021 [2]陕西延长石油(集团)永坪炼油厂,陕西延安717208

出　　处：《化工环保》2014年第1期55-59,共5页Environmental Protection of Chemical Industry

基　　金：陕西延长石油(集团)有限责任公司炼化公司2012年科研攻关项目(lhgs2012Ky-C-01);博士科研启动基金项目(2010BJ10-06)

摘　　要：采用化学除油降黏—污泥调理—离心脱水工艺处理某炼油厂废水处理系统的混合污泥，并对工艺条件进行优化。实验结果表明，最佳的工艺条件为：化学除油降黏阶段处理体系的pH=4，反应温度35 ℃，H2O2加入量 2 g/L，m（H2O2）∶ m（Fe2＋）=4，反应时间 60 min；污泥调理反应阶段的CaO加入量7.0 g/L；离心脱水阶段在分离因数为1 558时脱水5 min。在此条件下，得到的泥饼的含水率为70.0%~75.0%（w），含油率小于2%（w），污泥比阻约为3.0×107 s2/g。The mixed sludge from a refinery wastewater treatment system was treated by the process of chemical oil removing and viscosity reducing - sludge conditioning - centrifugal dewatering,and the process conditions were optimized. The experimental results show that the optimum process conditions are as follows：In chemical oil removing and viscosity reducing stage,the system pH=4,the reaction temperature is 35 ℃,the H2O2 dosage is 2 g/L,m（H2O2）∶m（Fe2＋）=4,the reaction time is 60 min;In sludge conditioning stage,the CaO dosage is 7.0 g/L;In centrifugal dewatering stage,the dewatering time is 5 min with 1 558 of separation factor. Under these conditions,the water content and oil content of the mud cake are 70.0%-75.0%（w） and under 2%（w） respectively,the specific resistance of the sludge is about 3.0×107 s2/g.

关 键 词：炼油废水污泥 化学除油降黏 污泥调理 离心 脱水 优化 

分 类 号：X742[环境科学与工程—环境工程]