滨二首站污水处理工艺优化研究

发布时间：2019-03-18 12:21

【摘要】：滨二污水处理站改性处理未投产,其富含CO2的酸性水质,腐蚀性极强,导致站内金属管线、罐体、阀件、泵、过滤器等腐蚀严重；站内污泥处理系统未投运,各处理构筑物排泥后进入污水池后,由污水提升泵重新打入处理流程,从而形成污泥内循环,造成水质恶化；由于过滤器腐蚀、内部构件损坏、滤料漏失等原因,污水中的污油及悬浮物无法有效去除,导致处理后污水水质严重超标。论文在对滨二首站污水处理工艺优化研究过程中,采用了室内实验与现场试验相结合的方式,首先通过对滨二污水处理站进行现场考察调研,了解了滨二污水处理站所处的地理及自然环境,分析了滨二污水处理工艺自投建以来所进行的工艺调整,重点研究了站内流程以及站内主要处理设备的生产现状,并基于以上考察,详细总结了目前滨二污水处理站存在的问题,为下一步工艺改造研究奠定了基础。其次对滨二污水处理站外输污水水质及滨二首站来水水质进行取样化验分析,明确了水质超标项,分析了造成腐蚀严重的原因,进而研究了水质改性技术,明确改性技术在滨二首站污水处理系统的适应性较差；结合目前水质特点进行“稳定+净化”技术研究,并通过相应的药剂筛选、现场试验以及经济分析,探讨“稳定+净化”技术在滨二首站污水处理系统的适应性,实验结果表明,净化+水质稳定技术适合滨二污水站的污水处理,处理效果较好,并通过对加药后的水样进行试验对比,筛选出适合该站水质的混凝剂、絮凝剂、杀菌剂。最后根据水处理技术研究结果及滨二污水处理站现状,对站内的污水处理工艺进行研究,结合同行业先进、成熟技术,确定污水处理的工艺及改造方案,并完善加药、污水污油回收、污泥处理等系统。最后从经济技术指标、方案适应性以及经济效益等方面对所设计方案进行综合比选,筛选出既经济又工艺可行的设计方案。针对目前滨二首站来水水质特点以及水处理工艺现状,对胜利油田滨二首站污水处理工艺及其配套设施进行改造研究,不仅可以减轻站内金属管线、泵体以及阀门等腐蚀,而且还可以最大程度的降低污水中的污油以及悬浮物的含量,使得处理后的污水各项指标均能满足目前油藏开发需求,从而改善油田注水状况和油藏开发效果,降低开发成本。此外外出注水水质的改善可以降低启动压力,增加吸水指数,提高水驱效果和采油的速率,保障了油田安全平稳高效生产。
[Abstract]:The modified treatment of Biner No. 2 sewage treatment station has not been put into production, which is rich in acidic water quality of CO2 and is very corrosive, which results in serious corrosion of metal pipelines, tanks, valves, pumps, filters and so on in the station. The sludge treatment system in the station is not put into operation, after each treatment structure is discharged into the sewage pool, the sewage lifting pump reenters the treatment process, thus forming the sludge internal circulation, resulting in the deterioration of the water quality. Due to the corrosion of the filter, the damage of the internal components and the leakage of the filter material, the sewage oil and suspended matter cannot be removed effectively, which leads to the serious water quality exceeding the standard after treatment. In the process of optimizing the wastewater treatment process of the second littoral first station, this paper adopts the way of combining indoor experiment with field test. Firstly, through the on-the-spot investigation and investigation of the second littoral sewage treatment station, In this paper, the geographical and natural environment of the second littoral sewage treatment station is understood, and the process adjustment since the construction of the littoral second sewage treatment process is analyzed, and the process flow and the production status of the main treatment equipment in the station are emphatically studied. Based on the above investigation, this paper summarizes the problems existing in the second littoral sewage treatment station in detail, which lays a foundation for the further research on the process transformation. Secondly, the water quality of the effluent from the second littoral sewage treatment station and the incoming water from the second littoral station are analyzed by sampling and analysis, the water quality exceeding the standard is defined, the cause of serious corrosion is analyzed, and then the water quality modification technology is studied. It is clear that the adaptability of the modification technology in the sewage treatment system of the second littoral first station is poor; According to the characteristics of water quality at present, the "stable purification" technology is studied, and the adaptability of the "stable purification" technology in the sewage treatment system of the second littoral first station is discussed through the corresponding medicament screening, field test and economic analysis. The experimental results show that the water quality stabilization technology is suitable for the treatment of wastewater from the second littoral sewage station, and the treatment effect is better. The coagulant, flocculant and fungicide suitable for the water quality of the station are selected through the comparison of the water samples added with the medicine. Finally, according to the research results of water treatment technology and the status quo of Biner No. 2 sewage treatment Station, the sewage treatment process in the station is studied. Combined with the advanced and mature technology in the same industry, the sewage treatment process and transformation scheme are determined, and the medicine addition is perfected. Sewage oil recovery, sludge treatment and other systems. Finally, the design scheme is selected from the aspects of economic and technical index, scheme adaptability and economic benefit, and the economical and technologically feasible design scheme is selected. In view of the characteristics of incoming water quality and the status quo of water treatment technology in Binjiaotou station at present, the revamping of sewage treatment process and its supporting facilities in Binshou station of Shengli Oilfield can not only reduce corrosion of metal pipeline, pump body and valve in the station, etc. Moreover, it can also reduce the content of sewage oil and suspended solids to the maximum extent, so that all the indexes of treated sewage can meet the present demand of reservoir development, thus improve the water flooding condition and reservoir development effect of oil field, and reduce the development cost. In addition, the improvement of water injection quality can reduce the start-up pressure, increase the water absorption index, improve the water drive effect and oil recovery rate, and ensure the safe, stable and efficient production of the oil field.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X741

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