摘要
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1 076～1 179、87～681μg/L,排放量占全厂排放总量的54.0%和27.0%.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83.0%.炼油废水中多环芳烃去除率沿处理流程逐级递减,由40.0%降至7.5%.高环数芳烃的去除率达95.0%,明显高于低环数芳烃的90.0%的去除率.
The emission and removal of 16 Polycyclic Aromatic Hydrocarbons(PAHs)in petroleum refining wastewater were analyzed through sampling inspection.The analysis shows that the PAHs concentration,components and quantity of emission in refining wastewater of different units vary significantly.The catalytic cracking unit and delayed coking unit are the major sources of generation and emission of PAHs wastewater.The mass concentration in the catalytic cracking unit emission is 1 076~1 179μg/L,and that in the delayed coking unit is 87~681μg/L,accounting for 54.0% and 27.0% of the total emissions respectively.The PAHs components in the refining unit and the sewage treatment unit follow the same pattern:the predominant components are low molecular weight(LMW)PAHs,such as fluorine,acenaphthylene and phenanthrene,and the concentration of 2-and 3-cycle PAHs accounts for 83.0% of the total concentration.The removal rate of PAHs in the wastewater reduces along the sewage treatment process,from 40.0% to 7.5%.The removal rate of high molecular weight(HMW)PAHs was 95.0%,which was higher than the 90.0% removal rate of LMW PAHs.
作者
李煜婷
许德刚
冉照宽
李志
罗武文
LI Yuting;XU Degang;RAN Zhaokuan;LI Zhi;LUO Wuwen(CNPC Research Institute of Safety and Environment Technology,Beijing 102206,China;China University of Petroleum,Beijing 102249,China;Beijing SDL Technology Co.,Ltd.,Beijing 102206,China)
出处
《华南师范大学学报（自然科学版）》
CAS
北大核心
2018年第6期54-60,共7页
Journal of South China Normal University(Natural Science Edition)
基金
国家科技重大专项项目(2016ZX05040-002)
中国石油集团直属院所基础科学研究和战略储备技术研究基金项目(2017D-5008)
关键词
炼油废水
多环芳烃
排放特征
消减特征
petroleum refining wastewater
polycyclic aromatic hydrocarbons
emission
elimination
