摘要
本项研究针对华北岔河集油田聚合物／铬弱凝胶调驱油藏采出水。实验污水水质数据（单位mg／L）如下：矿化度8432；含油1189；含悬浮固体51；含弱凝胶201；COD值1152。研究了Fenton试剂法去除污水COD的条件和外加因素的影响。除另外指出的情况外，反应温度为30℃，时间2h。当H2O2与Fe^2＋质量比为5：3时，使COD去除率达到最高所需加入的H2O2＋Fe^2＋量（单位g／L，下同），在暗光下为2．0＋1．2，在紫外光下为1．5＋0．9。固定H2O2加量为1．5，则两种情况下Fe^2＋最适加量均为0．9。H2O2＋Fe^2＋加量为1．5＋0．9时，最适反应温度区间在暗光下为40-50℃，在紫外光下为30--60℃。H2O2＋Fe^2＋加量为1．5＋1．0时，最高COD去除率和所需反应时间为：暗光下92．0％，2．5h；紫外光下95．7％，2．5h；紫外光加充氧时97．8％，1，5h；紫外光加充氧加草酸钠时99．0％，2h。随外加草酸钠量增大（0．1～0．6g/L），低H2O2＋Fe^2＋加量下COD去除率不断增大，较高H2O2＋Fe^2＋加量下达到最高值后略有下降，加量为1．0＋0．6和1．5＋0．9并加入0.5g／L草酸钠时分别为97．196和99，0％。图3表5参4。
This study is aimed on treating produced water of polymer/Cr（ Ⅲ ） weak gel profiling/flooding reservoir at Chaheji, Huabei. The experimental water sample is characterized by following data in mg/L： TSD 8432; oil content 1189; suspended solids 51; weak gel content 201; and COD 1152. The conditions and the effects of extemal factors on COD removal in the water sample by using Fenton＇s reaction are investigated. The reaction temperature is of 30℃ and the time duration 2 hrs unless otherwise noted. At H2O2 to Fe^2 ＋ mass ratio = 5 ： 3, the dosages of H2O2 ＋ Fe^2＋ in g/L needed for maximal COD removal to be reached is of 2.0 ＋ 1.2 in dark reaction and of 1.5 ＋ 0.9 under UV radiation. With H2O2 dosage being of 1.5, the optimal dosage of Fe^2＋ is 0.9 in the 2 cases. At H2O2 ＋ Fe^2＋ dosages 1.5 ＋ 0.9, the optimal reaction temperature is in range 40-50℃ in dark and 30-60℃ under UV radiation. At H2O2 ＋ Fe^2＋ dosages 1.5 ＋ 1.0, the highest COD removal rate reached and the reaction time needed are as follows： 92.0% and 2.5 hrs in dark; 95.7% and 2.5 hrs under UV radiation; 97.8% and 1.5 hrs under UV radiation and 02 expose; and 99.0% and 2 hrs under UV radiation 02 expose and sodium oxalate added. With increasing sodium oxalate dosage from 0.1 to 0.6 g/ L, the COD removal rate at lower H2O2＋Fe^2＋ dosages continuously increases and at higher H2O2＋Fe^2＋ dosages reaches a maximal value and then drops a little and the maximal value is of 97.1% and 99.0 % at H2O2＋Fe^2＋ dosage 1.0 ＋ 0.6 and 1.5 ＋ 0.9, respectively, and dosage of sodium oxalate 0.5.
出处
《油田化学》
CAS
CSCD
北大核心
2007年第2期167-170,共4页
Oilfield Chemistry
