东营某炼油废水处理工艺方案设计

发布时间：2018-03-11 21:29

  本文选题：炼油废水　切入点：工艺设计　出处：《山东大学》2015年硕士论文　论文类型：学位论文

【摘要】：炼油废水是石油炼制过程中排放的含油废水,具有排放量大,污染物成分复杂、浓度高,含大量有毒和难生物降解污染物等特点,直接排放会对环境造成极大危害。传统炼油废水处理工艺为“隔油-气浮-生化”的老三套工艺,技术成熟、可靠,但对废水处理效果有限,难以达到日益提高的排放标准。同时,单一的处理工艺很难达到国家和地方排放标准,多级组合处理工艺能根据各处理单元特点,发挥各处理单元优势而避免其局限性,达到较好的处理效果,正得到越来越多的工程实际应用。本废水处理设计以东营某炼油厂废水处理为实例,根据对项目水质特征的分析,结合当地自然条件、排放标准等因素,进行了工艺比选、设计参数和运行参数分析论证,确定了一套“隔油+涡凹气浮+溶气气浮+MBBR+臭氧氧化+曝气生物滤池+过滤+消毒”的组合工艺,并对工程进行了具体的构筑物设计和设备选型。根据设计方案预期处理效果,该炼油废水经组合工艺处理后,pH为6-9,CODcr≤50 mg/L, BOD5≤10 mg/L, SS≤20 mg/L, NH4+-N5 mg/L,石油类≤3 mg/L,挥发酚≤0.2 mg/L,硫化物≤1.0 mg/L,总氰化物≤0.5 mg/L,色度小于30倍,出水水质达到《山东省海河流域水污染物综合排放标准》(DB37/675-2007)一级标准及2011年修改页排放标准。根据设计方案,组合工艺对CODc,的预期去除率为97.5%,对SS的预期去除率为97.1%,对NH4+-N的预期去除率为92.8%,对石油类的预期去除率将达到99.4%。该组合工艺对炼油废水预期处理效果较好,当水质在一定的浓度范围内波动时,组合工艺具有较好的耐冲击负荷能力,可稳定运行,在炼油废水处理中具有广阔的工程应用前景。
[Abstract]:Refinery wastewater is a kind of oily wastewater discharged in the process of petroleum refining. It has the characteristics of large discharge, complex pollutant composition, high concentration, large amount of toxic and difficult biodegradable pollutants, etc. Direct discharge will cause great harm to the environment. The traditional refinery wastewater treatment process is the old three sets of "oil separation, air floatation and biochemistry" process. The technology is mature and reliable, but the effect on wastewater treatment is limited. At the same time, it is very difficult for a single treatment process to meet the national and local emission standards, and the multistage combined treatment process can take advantage of each treatment unit and avoid its limitations according to the characteristics of each treatment unit. The wastewater treatment design takes the wastewater treatment of a refinery in Dongying as an example, according to the analysis of the water quality characteristics of the project, combined with local natural conditions, discharge standards and other factors, Process comparison and selection, analysis and demonstration of design parameters and operation parameters are carried out, and a set of combined process "filtering and disinfection of MBBR ozone oxidation aerated biofilter" is determined. And the specific structure design and equipment selection are carried out. According to the design plan, the expected treatment effect, After being treated by the combined process, the pH of the wastewater is 6-9 BOD5 鈮，

本文编号：1599971