油田污水处理站浮渣控制技术研究与应用
|
摘要
彩南油田污水处理系统改扩建投产后,系统产生了大量浮渣并存在恶性循环,导致污水出站水质和外交原油含水0.5%(w)超标,系统运行困难。通过对污水和浮渣物性的深入分析,确定了在用药剂配方体系和来水的高碱度是产生上浮浮渣的关键因素。提出以水质稳定为核心,围绕主体工艺,源头治理、点面结合的研究思路,筛选出适合于污水的处理药剂,并通过油气水三大系统分开排污,稳定回收水水质,提高离心机出泥率,有效控制浮渣产生量,实现出站水质综合达标率100%,浮渣控制取得了明显的效果。
A large amount of scum was generated which in turn created a vicious circle, resulting in the degradation of the water quality of the sewage station and the crude oil diplomatic water as well as the difficult operation of the system. Through in-depth analysis on physical properties of the sewage and scum, it was determined that the key factors were the formulation system and high alkalinity of the water. Thus, water conditioning was proposed as the core measures in addition to the research approach of source control and multi-scale measures centering the main process. The chemicals suiting the sewage treatment were screened out. Through the separate sewage recycling system of oil, gas and water, the water quality was stabilized, the mud yield rate at the centrifuge was improved, and the control of the scum generation was achieved. Finally, the water quality compliance rate was comprehensively maintained at 100% and the scum was controlled effectively.
A large amount of scum was generated which in turn created a vicious circle, resulting in the degradation of the water quality of the sewage station and the crude oil diplomatic water as well as the difficult operation of the system. Through in-depth analysis on physical properties of the sewage and scum, it was determined that the key factors were the formulation system and high alkalinity of the water. Thus, water conditioning was proposed as the core measures in addition to the research approach of source control and multi-scale measures centering the main process. The chemicals suiting the sewage treatment were screened out. Through the separate sewage recycling system of oil, gas and water, the water quality was stabilized, the mud yield rate at the centrifuge was improved, and the control of the scum generation was achieved. Finally, the water quality compliance rate was comprehensively maintained at 100% and the scum was controlled effectively.
引文
[1] 卢瑜林,侯卫红,戴莉.絮凝沉降技术在污水水质处理中的研究实践[J].江汉石油科技,2008,18(1):38-40.
[2] 张文.油田污水处理技术现状及发展趋势[J].油气地质与采收率,2010,17(2):108-110.
[3 ] 范韬.油田污水水质稳定技术的研究[J].石油与天然气化工,2011,40(2):214-217,102.
[4] 刘世景,屈撑囤,焦琨.油田污水处理絮凝剂的研究及发展[J].辽宁化工,2013,42(11):1301-1306.
[5 ]李佳,罗一菁,张忠智,等.微生物絮凝剂对油田采出液污水絮凝效果的研究[J].石油与天然气化工,2012,41(3):341-345,362.
[6] 王莹,康万利,高倩倩,等.油田污水中去除阳离子的方法[J].光谱实验室,2011,28(3):1223-1226.
[7] 赵林,徐玉霞,马超,等.油田污水处理高分子絮凝剂的发展现状[J].河南石油,2005,19(3):67-70.
[8] 孙新民.油田污水处理中油田化学剂的应用分析[J].化工管理,2017(15):6.
[9] 唐丽.新疆克拉玛依油田百重7井区稠油污水处理工艺技术[J].石油与天然气化工,2016,45(1):112-116.
[10] 殷红军.大庆油田含油污水处理关键技术参数研究[D].长春:吉林大学,2016.
1.试验温度:25～30 ℃。
①投加pH值调节剂30 mg/L;②投加pH值调节剂50 mg/L。
2.2.2 优化净水药剂根据彩南污水处理站污水物性、浮渣的特性对现场的净水药剂体系进行进一步筛选。彩南污水具有高含硫化物的特点,在药剂中添加除硫剂,除去污水中的硫离子,增强净化水的稳定性;彩南浮渣的表面电荷较低,聚凝性好,使用含有阳离子的净水剂进行电荷的吸附,以破坏浮渣的聚凝性;为巩固浮渣下沉的效果,使用絮凝剂,增强絮凝净化能力。通过筛选后,确定净水药剂体系主要由除硫剂、净水剂、絮凝剂3种组成。通过室内评价(见表6),可以看出优化净水药剂体系后,形成的絮体密实,均快速下沉,水色透亮(见图5)。二价硫由7～8 mg/L下降至1 mg/L以下,除硫率达95%以上。
[2] 张文.油田污水处理技术现状及发展趋势[J].油气地质与采收率,2010,17(2):108-110.
[3 ] 范韬.油田污水水质稳定技术的研究[J].石油与天然气化工,2011,40(2):214-217,102.
[4] 刘世景,屈撑囤,焦琨.油田污水处理絮凝剂的研究及发展[J].辽宁化工,2013,42(11):1301-1306.
[5 ]李佳,罗一菁,张忠智,等.微生物絮凝剂对油田采出液污水絮凝效果的研究[J].石油与天然气化工,2012,41(3):341-345,362.
[6] 王莹,康万利,高倩倩,等.油田污水中去除阳离子的方法[J].光谱实验室,2011,28(3):1223-1226.
[7] 赵林,徐玉霞,马超,等.油田污水处理高分子絮凝剂的发展现状[J].河南石油,2005,19(3):67-70.
[8] 孙新民.油田污水处理中油田化学剂的应用分析[J].化工管理,2017(15):6.
[9] 唐丽.新疆克拉玛依油田百重7井区稠油污水处理工艺技术[J].石油与天然气化工,2016,45(1):112-116.
[10] 殷红军.大庆油田含油污水处理关键技术参数研究[D].长春:吉林大学,2016.
1.试验温度:25～30 ℃。
①投加pH值调节剂30 mg/L;②投加pH值调节剂50 mg/L。
2.2.2 优化净水药剂根据彩南污水处理站污水物性、浮渣的特性对现场的净水药剂体系进行进一步筛选。彩南污水具有高含硫化物的特点,在药剂中添加除硫剂,除去污水中的硫离子,增强净化水的稳定性;彩南浮渣的表面电荷较低,聚凝性好,使用含有阳离子的净水剂进行电荷的吸附,以破坏浮渣的聚凝性;为巩固浮渣下沉的效果,使用絮凝剂,增强絮凝净化能力。通过筛选后,确定净水药剂体系主要由除硫剂、净水剂、絮凝剂3种组成。通过室内评价(见表6),可以看出优化净水药剂体系后,形成的絮体密实,均快速下沉,水色透亮(见图5)。二价硫由7～8 mg/L下降至1 mg/L以下,除硫率达95%以上。