摘要
采用热水洗涤法处理龙口页岩油泥。利用纯水清洗页岩油泥,考察液固比、搅拌频率、清洗温度、清洗时间对油回收的影响,确定纯水清洗的最佳工况。经过试剂筛选、复配,确定试剂配方为OP-10∶Na_2SiO_3=1∶3。通过正交试验优化工况,试验结果表明:温度70℃、搅拌频率330 r/min、清洗时间30 min、液固比为5∶1、OP-10∶Na_2SiO_3=1∶3的浓度为6.0 g/L、含油率为60.31%的页岩油泥经过热化学法清洗后,残油率为2.84%。通过比较极差的大小,各因素对清洗效果影响的大小顺序为试剂浓度>温度>液固比>搅拌频率。由扫描电镜(SEM)分析可知,清洗过程会对油泥的微观形貌产生一定的影响。试剂Na_2SiO_3清洗后油泥呈现网状沟壑结构,其分散程度和比表面积均有增加。在清洗试验后,清洗液可以循环使用,剩余的油泥渣制作成砖,进而减少对环境的二次污染。
The method of hot water washing was used to treat the oil shale sludge.Oil shale sludge was cleaned by pure water in order to study the effects of liquid-solid ratio,agitate rate,temperature,clean time on residual shale oil of the oil shale sludge.Then the optimized condition of cleaning was determined.After screening and remixing the reagents,OP-10∶ Na_2SiO_3= 1∶ 3（the mass ratio） was selected.Orthogonal tests were conducted,the results from which indicates that the residual oil contained in the sample reduces from 60.31% to 2.84% after agitating for 30 min at 70 ℃ with agitation frequency at 330 r/min,ratio of liquid to solid at 5 ∶ 1,chemical reagent concentration at 6.0 g/L.By comparing the range,the order of the influencing factors is reagent concentrations〉 temperature 〉liquid-solid ratio 〉agitate rate.The SEM pictures of the oil shale sludge shows that a certain influence occurs on the microstructure of the oil shale sludge during the process of cleaning.The oil shale sludge presents net gully structure,with increasing the dispersion degree and the surface area.After the process of cleaning,the cleaning solution can be recycled and the remaining oil shale sludge can be made into bricks,then it reduces the secondary pollution of the environment.
出处
《科学技术与工程》
北大核心
2017年第30期211-216,共6页
Science Technology and Engineering
基金
吉林省科技厅项目(20150204012SF)
长江学者和创新团队发展计划(IRT13052)
吉林省教育厅项目(吉教科合字[2015]第251号)资助
关键词
页岩油泥
表面活性剂
热水洗涤
正交试验
oil shale sludge suractants hot water washing orthogonal design
