炼油污水处理厂深度处理改造设计研究
发布时间：2018-10-20 16:49
【摘要】：中国石油化工股份有限公司长岭分公司(长岭炼油厂)第二污水处理厂建于1997年,设计处理能力为600 m3/h,实际处理量400m3/h。主要处理工艺是溶气气浮、水解酸化池和氧化沟生化联合工艺,处理后的达标污水通过管线排入长江。长岭炼油厂进行油品质量升级改造扩建项目实施后,进入第二污水处理厂的污水COD浓度远高于原有进水设计值,进水有机物负荷过高,污泥负荷超过污泥处理能力,生化处理达不到预期效果。因达不到排放标准而回流的污水量过大,导致污水处理装置水量负荷过大,停留时间减小,再次影响处理效果,形成恶性循环。为了保证第二污水处理厂的正常运行,保证长炼公司生产装置的正常运行,必须对二污污水处理设施进行升级改造,或者重建,对污水进行深度处理,提高出水水质,方可满足生产需求。本课题设计研究的内容主要包括对“二污”污水水质水量进行一定分析,研究“二污”现有的各个污水处理工艺,提出污水处理设施的存在的问题及不足,并针对该问题提出可行方案。对拟采用的内循环生物曝气滤池处理“二污”不达标废水进行实验,研究可行性并获得必要的结构与运行参数。再此基础上进行工程改造方案构建。综合考虑现场布局、施工难度、维修管理、经济合理等各个因素,最终选择最优方案。在尽量利旧的前提下,新增部分处理设施。综合考虑规范要求、原有构筑物及工艺、地形、投资等因素,本设计将原有均质池改造为生物接触氧化池,初步氧化分解大分子难降解的有机物,一定程度上提高了污水的可生化性,提高后续生化设施的处理效率。在二沉池后提升池前,增设深度处理设施,即砂滤池+内循环生物曝气滤池(IRBAF)工艺,对污水进行深度处理,使污水达标排放。实践证明,采用“生化接触氧化+砂滤池+内循环生物曝气滤池(IRBAF)"处理工艺,能有效实现炼油污水处理厂有机物的深度处理。
[Abstract]:The second wastewater treatment plant of Changling Branch (Changling Refinery) of China Petrochemical Co., Ltd. was built in 1997. The designed treatment capacity is 600 m3 / h, and the actual treatment capacity is 400 m3 / h. The main process is dissolved air floatation, hydrolytic acidification tank and oxidation ditch biochemical process. The treated sewage is discharged into the Yangtze River through pipeline. After the implementation of the oil quality upgrading and extension project in Changling Refinery, the COD concentration of the wastewater entering the second sewage treatment plant is far higher than the original design value of the influent, the influent organic load is too high, and the sludge load exceeds the sludge treatment capacity. Biochemical treatment could not achieve the desired effect. The amount of wastewater reflux is too large because it can not reach the discharge standard, which leads to the excessive water load of sewage treatment unit and the decrease of residence time, which once again affects the treatment effect and forms a vicious circle. In order to ensure the normal operation of the second sewage treatment plant and the normal operation of the production plant in Changlian Company, it is necessary to upgrade or rebuild the sewage treatment facilities of the second sewage treatment plant, and carry out advanced treatment of the sewage to improve the quality of the effluent. To meet production needs. The content of the design and research of this subject mainly includes the analysis of the quantity of water quality and quantity of the sewage, the study of the existing sewage treatment processes, the problems and shortcomings of the sewage treatment facilities. A feasible scheme is put forward to solve this problem. In this paper, the internal circulating biological aerated filter (BFAF) was used to treat the wastewater with "secondary pollution", and the feasibility was studied and the necessary structure and operation parameters were obtained. On the basis of this, the project reconstruction scheme is constructed. Considering all factors such as site layout, construction difficulty, maintenance management, economy and so on, the best scheme is chosen. In the premise of the old as far as possible, the new part of the processing facilities. Considering the requirements of the specifications, the original structure and technology, topography, investment and other factors, the design of the original homogeneous tank into biological contact oxidation tank, preliminary oxidation decomposition of macromolecules difficult to degrade organic matter, To some extent, the biodegradability of sewage is improved, and the treatment efficiency of subsequent biochemical facilities is improved. In front of the secondary settling tank, advanced treatment facilities, namely (IRBAF) process of circulating biological aerated filter in sand filter, were added to treat the sewage and make the sewage discharge up to standard. It has been proved by practice that the advanced treatment of organic matter in refinery sewage treatment plant can be realized effectively by adopting the (IRBAF) process of biological aeration filter in biochemical contact oxidized sand filter.
【学位授予单位】：湘潭大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X742
本文编号：2283770
[Abstract]:The second wastewater treatment plant of Changling Branch (Changling Refinery) of China Petrochemical Co., Ltd. was built in 1997. The designed treatment capacity is 600 m3 / h, and the actual treatment capacity is 400 m3 / h. The main process is dissolved air floatation, hydrolytic acidification tank and oxidation ditch biochemical process. The treated sewage is discharged into the Yangtze River through pipeline. After the implementation of the oil quality upgrading and extension project in Changling Refinery, the COD concentration of the wastewater entering the second sewage treatment plant is far higher than the original design value of the influent, the influent organic load is too high, and the sludge load exceeds the sludge treatment capacity. Biochemical treatment could not achieve the desired effect. The amount of wastewater reflux is too large because it can not reach the discharge standard, which leads to the excessive water load of sewage treatment unit and the decrease of residence time, which once again affects the treatment effect and forms a vicious circle. In order to ensure the normal operation of the second sewage treatment plant and the normal operation of the production plant in Changlian Company, it is necessary to upgrade or rebuild the sewage treatment facilities of the second sewage treatment plant, and carry out advanced treatment of the sewage to improve the quality of the effluent. To meet production needs. The content of the design and research of this subject mainly includes the analysis of the quantity of water quality and quantity of the sewage, the study of the existing sewage treatment processes, the problems and shortcomings of the sewage treatment facilities. A feasible scheme is put forward to solve this problem. In this paper, the internal circulating biological aerated filter (BFAF) was used to treat the wastewater with "secondary pollution", and the feasibility was studied and the necessary structure and operation parameters were obtained. On the basis of this, the project reconstruction scheme is constructed. Considering all factors such as site layout, construction difficulty, maintenance management, economy and so on, the best scheme is chosen. In the premise of the old as far as possible, the new part of the processing facilities. Considering the requirements of the specifications, the original structure and technology, topography, investment and other factors, the design of the original homogeneous tank into biological contact oxidation tank, preliminary oxidation decomposition of macromolecules difficult to degrade organic matter, To some extent, the biodegradability of sewage is improved, and the treatment efficiency of subsequent biochemical facilities is improved. In front of the secondary settling tank, advanced treatment facilities, namely (IRBAF) process of circulating biological aerated filter in sand filter, were added to treat the sewage and make the sewage discharge up to standard. It has been proved by practice that the advanced treatment of organic matter in refinery sewage treatment plant can be realized effectively by adopting the (IRBAF) process of biological aeration filter in biochemical contact oxidized sand filter.
【学位授予单位】：湘潭大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X742
【参考文献】
相关硕士学位论文 前1条
1 程聪;高级氧化法处理难降解有机废水的研究[D];武汉纺织大学;2013年
，本文编号：2283770
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