基于包扎法的石化乙烯装置挥发性有机物排放特征

发布时间：2018-01-07 00:26

本文关键词：基于包扎法的石化乙烯装置挥发性有机物排放特征　出处：《中国环境科学》2016年03期 　论文类型：期刊论文

【摘要】：装置泄露是石油炼化生产过程中重要的挥发性有机物(VOCs)无组织排放源.基于动态吹扫包扎法采样和预浓缩—GC/MS分析方法,对我国南方某石化企业乙烯生产过程中裂解装置的压缩、分离系统及芳烃抽提装置的泄漏组件进行了VOCs排放特征研究.结果表明:烷烃(49.7%~82.4%)含量最高,其次是烯烃(3.2%~35.7%)和芳香烃(5.5%~14.4%);2-甲基戊烷、甲基环己烷、3-甲基己烷及2,3-二甲基丁烷在整个乙烯生产中都有重要比重.乙烯和反-2-丁烯是裂解装置的重要标志,而苯和甲苯是芳烃抽提装置的重要标志;臭氧生成潜势主要来自于烯烃,尤其是乙烯的贡献率最大,占总烯烃贡献的47.0%~73.0%.参考美国环保局推荐的Method-21,计算了轻液介质阀门的排放速率,获得其泄露排放速率与泄露浓度之间的定量关系为y=3×10~(-7)x~(0.993)(R~2=0.788).
[Abstract]:Spills are important volatile organic compounds in petroleum refining and petrochemical production process (VOCs) fugitive emission source. The dynamic blowing bandaging method for sampling and preconcentration - GC/MS analysis method based on the compression of the cracking in the south of China Petrochemical Enterprises in the process of ethylene production device, the leakage component separation system and aromatics extraction unit was studied the emission characteristics of VOCs. The results show that alkanes (49.7%~82.4%) was the highest, followed by olefin (3.2%~35.7%) and aromatic hydrocarbons (5.5%~14.4%); 2- methyl pentane, hexane and methyl cyclohexane, 3- methyl 2,3- two methyl butane has an important proportion in the whole ethylene production of ethylene and butene. Anti -2- is an important sign of cracking device. The benzene and toluene is an important symbol of aromatics extraction unit; ozone formation potential mainly from olefins, especially ethylene, the largest contribution rate, the total contribution of 47% ~73.0%. olefins according to the U.S. Environmental Protection The Method-21 recommended by the Bureau calculated the discharge rate of the valve in the light liquid medium, and the quantitative relationship between the leakage rate and the leakage concentration was y=3 * 10~ (-7) x~ (0.993) (R~2=0.788).

【作者单位】：暨南大学大气环境安全与污染控制研究所;暨南大学广东省大气污染在线源解析系统工程技术研究中心;暨南大学环境学院;
【基金】：国家自然科学基金NSFC-广东省联合基金重点项目(U1201232) 中央高校基本科研业务费专项资金资助项目(21614108)
【分类号】：X742
【正文快照】： 挥发性有机物(VOCs)是形成光化学烟雾和二次有机气溶胶的前体物[1-4].工业源是城市大气中VOCs的主要来源之一[5-10],其中炼油和石化行业排放的VOCs对VOCs的工业排放源有相当大的贡献,约占到18.1%~34.5%[11].随着石油化工企业规模不断扩大,装置运行周期逐步延长,生产工艺向高温

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