高桥石化公司炼油事业部3#污水处理场运行状况分析与试验研究
发布时间：2018-08-18 10:52
【摘要】：中国石油化工股份有限公司上海高桥分公司炼油事业部3#污水处理场设计的处理对象是国产低含硫原油加工废水,采用的处理工艺也是传统的“隔油+气浮+生化处理”工艺。近年来,由于加工原油的多样化,导致废水水质发生了较大的变化。传统的“隔油+气浮+生化处理”工艺已无法保证出水稳定达标排放。为此,本文首先对高桥石化炼油事业部3#污水处理场的运行状况进行了统计分析,通过实验室研究对几股主要废水的生物降解性能进行了评估,并考察了Fenton试剂氧化法深度处理二级生化出水的性能。结果表明,炼油事业部3#污水处理场的隔油系统出水含油量维持在30mg/L左右,去除率为85%-90%,最终气浮出水的含油量都降到了10 mg/L左右,隔油加气浮对油的总去除率达到95%以上,避免了废水中乳化油等对生化系统的冲击。但几股主要来水如罐区油罐切水、蒸馏电脱盐排水和酸性水净化水中都含有一定数量的难降解有机物,是导致有时出水CODCr超标的主要原因；CODCr≤200的二级生化出水,经Fenton试剂氧化处理后,其CODcr值可以降解到100mg/L的排放限值以下。该反应的适宜条件是：初始pH=3.5、H2O2投加量1-2mmol、Fe2+投加量0.2-0.3mmol、反应时间=2h。
[Abstract]:The wastewater treatment plant designed by the refining department of Shanghai Gaoqiao Branch of China Petrochemical Co., Ltd. is designed to deal with domestic low-sulfur crude oil processing wastewater, and the treatment process is also a traditional "oil-separated air flotation biochemical treatment" process. In recent years, due to the diversification of crude oil processing, the wastewater quality has changed greatly. The traditional "oil-separated air-floatation biochemical treatment" process has been unable to ensure that the effluent can meet the discharge standards stably. For this reason, this paper firstly carries on the statistical analysis to the operation condition of the wastewater treatment plant of Gaoqiao Petrochemical Refining Division, and evaluates the biodegradability of several main wastewater through laboratory research. The performance of Fenton reagent oxidation process for advanced treatment of secondary biochemical effluent was also investigated. The results show that the oil content in the effluent of the oil separation system of the sewage treatment plant of the refining department is maintained at about 30mg/L, and the removal rate is 85-90. The oil content of the final floatation effluent is reduced to about 10 mg/L, and the total removal rate of the oil from the oil separation system plus air floatation reaches more than 95%. The impact of emulsified oil in wastewater on biochemical system is avoided. However, several main streams of water, such as oil tank water cut, distilled electric desalination drainage and acid water purification water, all contain a certain amount of refractory organic matter, which is the main reason leading to the CODCr exceeding the standard sometimes and the secondary biochemical effluent with CODCr 鈮，
本文编号：2189244
[Abstract]:The wastewater treatment plant designed by the refining department of Shanghai Gaoqiao Branch of China Petrochemical Co., Ltd. is designed to deal with domestic low-sulfur crude oil processing wastewater, and the treatment process is also a traditional "oil-separated air flotation biochemical treatment" process. In recent years, due to the diversification of crude oil processing, the wastewater quality has changed greatly. The traditional "oil-separated air-floatation biochemical treatment" process has been unable to ensure that the effluent can meet the discharge standards stably. For this reason, this paper firstly carries on the statistical analysis to the operation condition of the wastewater treatment plant of Gaoqiao Petrochemical Refining Division, and evaluates the biodegradability of several main wastewater through laboratory research. The performance of Fenton reagent oxidation process for advanced treatment of secondary biochemical effluent was also investigated. The results show that the oil content in the effluent of the oil separation system of the sewage treatment plant of the refining department is maintained at about 30mg/L, and the removal rate is 85-90. The oil content of the final floatation effluent is reduced to about 10 mg/L, and the total removal rate of the oil from the oil separation system plus air floatation reaches more than 95%. The impact of emulsified oil in wastewater on biochemical system is avoided. However, several main streams of water, such as oil tank water cut, distilled electric desalination drainage and acid water purification water, all contain a certain amount of refractory organic matter, which is the main reason leading to the CODCr exceeding the standard sometimes and the secondary biochemical effluent with CODCr 鈮，
本文编号：2189244
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