炼油废水深度处理工艺设计与运行调试
发布时间：2018-07-20 19:34
【摘要】：随着社会的发展和人民生活水平的不断提高,对水资源的需求量也在日益增加。水资源的严重短缺和水污染问题已成为我国经济建设和社会发展的制约因素。污水回用是缓解我国水资源紧缺的重要途径之一。炼油加工企业是用水大户,也是排污大户,设备循环冷却水占企业总用水量的90%以上,对于原油加工量为500万吨／年的炼油企业来说,循环冷却水系统补水量每天可达3600m3,因此将污水回用于循环冷却水系统补水,节水潜力是巨大的。河北某炼油企业,,目前生产过程中产生的废水主要分为含盐废水和含油废水,两种废水经分质处理达到《污水综合排放标准》GB8978-1996二级标准和《河北省氯化物排放标准》(DB13/831-2006)三级标准。为了降低水资源消耗,提高污水回用率,决定对经二级处理的含油废水经深度处理后回用于循环冷却水系统和厂区绿化。本文针对河北某炼油企业含油废水二级出水水质特点,通过多方案技术经济比较,将“内循环曝气生物滤池+高密度澄清池+流砂过滤”组合新工艺成功应用于炼油废水深度处理与回用工程实践中。按照国家相关的设计规范及标准要求,完成了该工程的工艺设计和运行调试。工程实践结果表明：含油废水二级出水经以上深度处理后COD、石油类、SS、NH3-N和总硬度去除率分别达到52%、87%、84%、91%和46%。工程投运后,运行状态平稳,出水水质达到了《炼化企业节水减排考核指标与回用水质控制指标》QSH0104-2007的标准要求。该工程设计规模10800m3/d,工程总投资1508.69万元,吨水处理成本为0.83元。该工程的成功实施,使企业污水回用率由原来的20%提高到了70%,同时大大减少了企业污水的排放量,合理保护了地下水资源和周边环境。具有良好的社会效益、环境效益和经济效益。
[Abstract]:With the development of society and the improvement of people's living standard, the demand for water resources is increasing day by day. The serious shortage of water resources and water pollution have become the restrictive factors of economic construction and social development in China. Wastewater reuse is one of the important ways to alleviate the shortage of water resources in China. Oil refining and processing enterprises are big users of water and sewage. Equipment circulating cooling water accounts for more than 90% of the total water consumption of the enterprises. For oil refining enterprises with crude oil processing capacity of 5 million tons per year, The rehydration capacity of circulating cooling water system can reach 3600m3 per day, so the water saving potential of reusing wastewater in circulating cooling water system is great. The wastewater produced in the present production process in a refinery in Hebei Province is mainly divided into salt containing wastewater and oil containing wastewater. The two kinds of wastewater are treated by different quality to meet the second class standard of GB8978-1996 and the standard of chloride discharge of Hebei Province (DB13 / 831-2006). In order to reduce the consumption of water resources and increase the rate of wastewater reuse, it is decided to reuse the oil-bearing wastewater after advanced treatment in the circulating cooling water system and the plant area for greening. According to the characteristics of secondary effluent quality of oil-bearing wastewater from an oil refinery in Hebei Province, the technical and economic comparison of multiple schemes is carried out in this paper. The new combined process of "internal circulating biological aerated filter (BFAF) with high density clarifier flow sand filtration" has been successfully applied to the advanced treatment and reuse of refinery wastewater. The process design and commissioning of the project have been completed according to the relevant national design specifications and standards. The results of engineering practice show that after advanced treatment of COD, the removal rates of NH3-N and total hardness of the secondary effluent from oily wastewater are 5220.87% and 46.1% respectively. After the project was put into operation, the running condition was stable, and the effluent quality reached the standard requirement of "water saving and emission reduction assessment index and reuse water quality control index" QSH0104-2007. The design scale of the project is 10800 m3 / d, the total investment of the project is 15.0869 million yuan, and the cost of water treatment is 0.83 yuan per ton. With the successful implementation of the project, the reuse rate of enterprise sewage has been raised from 20% to 70%, and the discharge of sewage has been greatly reduced, and the groundwater resources and the surrounding environment have been reasonably protected. It has good social, environmental and economic benefits.
【学位授予单位】：河北科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X742
本文编号：2134545
[Abstract]:With the development of society and the improvement of people's living standard, the demand for water resources is increasing day by day. The serious shortage of water resources and water pollution have become the restrictive factors of economic construction and social development in China. Wastewater reuse is one of the important ways to alleviate the shortage of water resources in China. Oil refining and processing enterprises are big users of water and sewage. Equipment circulating cooling water accounts for more than 90% of the total water consumption of the enterprises. For oil refining enterprises with crude oil processing capacity of 5 million tons per year, The rehydration capacity of circulating cooling water system can reach 3600m3 per day, so the water saving potential of reusing wastewater in circulating cooling water system is great. The wastewater produced in the present production process in a refinery in Hebei Province is mainly divided into salt containing wastewater and oil containing wastewater. The two kinds of wastewater are treated by different quality to meet the second class standard of GB8978-1996 and the standard of chloride discharge of Hebei Province (DB13 / 831-2006). In order to reduce the consumption of water resources and increase the rate of wastewater reuse, it is decided to reuse the oil-bearing wastewater after advanced treatment in the circulating cooling water system and the plant area for greening. According to the characteristics of secondary effluent quality of oil-bearing wastewater from an oil refinery in Hebei Province, the technical and economic comparison of multiple schemes is carried out in this paper. The new combined process of "internal circulating biological aerated filter (BFAF) with high density clarifier flow sand filtration" has been successfully applied to the advanced treatment and reuse of refinery wastewater. The process design and commissioning of the project have been completed according to the relevant national design specifications and standards. The results of engineering practice show that after advanced treatment of COD, the removal rates of NH3-N and total hardness of the secondary effluent from oily wastewater are 5220.87% and 46.1% respectively. After the project was put into operation, the running condition was stable, and the effluent quality reached the standard requirement of "water saving and emission reduction assessment index and reuse water quality control index" QSH0104-2007. The design scale of the project is 10800 m3 / d, the total investment of the project is 15.0869 million yuan, and the cost of water treatment is 0.83 yuan per ton. With the successful implementation of the project, the reuse rate of enterprise sewage has been raised from 20% to 70%, and the discharge of sewage has been greatly reduced, and the groundwater resources and the surrounding environment have been reasonably protected. It has good social, environmental and economic benefits.
【学位授予单位】：河北科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X742
【共引文献】
相关硕士学位论文 前2条
1 顾飞宇;生化制药废水处理工程技改及效果研究[D];武汉工程大学;2013年
2 陆艳侠;曝气生物滤池前置反硝化工艺性能研究[D];安徽建筑大学;2014年
，本文编号：2134545
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