石油炼制中多环芳烃的排放和消减特征研究

以典型炼油废水为研究对象，通过采样监测，结合炼油工艺特点分析了多环芳烃的产排和消减特征. 研究表明:炼油各生产装置废水中多环芳烃的质量浓度、组分和排放量差异较大. 二次加工工段的催化裂化装置和延迟焦化装置是废水中多环芳烃产生和排放的主要污染源，质量浓度分别为1076~1179、87~681g/L，排放量占全厂排放总量的54%和27%. 生产装置与污水处理单元废水中多环芳烃的组分分布呈现一致性，主要以芴、二氢苊和菲等低环数芳烃为主， 二~三环芳烃质量浓度占总组分质量浓度的83%. 炼油废水中多环芳烃去除率沿处理流程逐级递减，由40%降至7.5%. 高环数芳烃的去除率达95%，明显高于低环数芳烃的90%的去除率.

On the Characteristic of Polycyclic Aromatic Hydrocarbons Emission and Removal in the Petroleum Refining Process

Through the method of sampling inspection, this article studied emission and elimination characteristic of EPA 16 kinds Polycyclic Aromatic Hydrocarbons (PAHs) in petroleum refining wastewater. The analysis shows: concentrations, components and emissions quantity of PAHs in refining wastewater of different units vary significantly. Catalytic cracking unit and delayed coking unit are major sources of wastewater PAHs generation and emission. The mass concentration of catalytic cracking unit emission is 1076~1179g/L, while of delayed coking unit is 87~681g/L, accounted for 54% and 27% of the total emissions respectively. The PAHs components in the refining units and sewage treatment units are following same pattern: low rings PAHs, such as fluorine, acenaphthylene, phenanthrene are the most predominates, which concentration accounted for 83% of the total components concentration. The removal rates of wastewater PAHs reduces along the sewage treatment process, which decreased gradually from 40% to 7.5%. The removal rate of high rings PAHs was 95%, which was higher than 90% removal rate of low rings PAHs.