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典型石化企业地面火炬挥发性有机物及温室气体排放特征与环境影响

Characteristics and environmental impact of VOCs and greenhouse gas emissions from ground flares of typical petrochemical enterprises

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针对我国石化行业减污降碳形势严峻的现实,以具有百万吨乙烯裂解能力的某石化企业中 2 座地面火炬为研究对象,通过现场采样监测和模型计算,系统探讨了火炬燃烧过程中挥发性有机物(VOCs)和温室气体的排放特征.结果表明:A、B 2 座火炬 2021 年VOCs排放量分别为 310.56 和 77.38 t/a,烯烃是主要排放组分;温室气体排放以含碳化合物燃烧转化产生的CO2 为主,排放量约占火炬CO2 排放总量的 99.98%;2 座火炬的臭氧生成潜势(OFP)分别为 3 011.72 和 628.97 t/a,乙烯和丙烯分别是A、B火炬OFP的主要贡献者,贡献率分别为 39.52%和 44.91%;2 座火炬年全球增温潜势(GWP)分别为 5 806.92 和 1 148.46 t/a(以CO2 当量计),其中CO2 的贡献最大,其导致的直接温室效应是CH4 的 25.12～35.46 倍,是VOCs排放间接导致温室效应的 6.64～7.24 倍.
In response to the severe situation of pollution and carbon reduction in China's petrochemical industry,two ground flares in a petrochemical company with millions of tons of ethylene cracking capacity were studied.Through on-site sampling monitoring and model calculation,the emission characteristics of volatile organic compounds(VOCs)and greenhouse gases from the flares during the combustion process were systematically explored.The results showed that VOCs emissions from Flare A and B in 2021 were 310.56 and 77.38 t/a,respectively,with olefins as the main emitted components.Greenhouse gas emissions were dominated by CO2 generated from the conversion of carbon-containing compounds into combustion,accounting for about 99.98%of the total CO2 emissions from flares.The ozone formation potential(OFP)of Flare A and B was 3 011.72 and 628.97 t/a,respectively,and ethylene and propylene were the main contributors to OFP of Flare A and B,with contribution rate of 39.52%and 44.91%,respectively.The global warming potential(GWP)of the two flares was 5 806.92 and 1 148.46 t/a CO2eq,respectively,with CO2 contributing the most,leading to a direct greenhouse effect which was 25.12-35.46 times that of CH4,and 6.64-7.24 times that of the greenhouse effect indirectly caused by VOCs emissions.

petrochemical industryflarevolatile organic compoundsgreenhouse gasesozone formation potential(OFP)global warming potential(GWP)

卜梦雅、张钢锋、杜天君

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上海市环境科学研究院

石化行业 火炬 挥发性有机物 温室气体 臭氧生成潜势 全球增温潜势

上海市科技创新行动计划国际科技合作项目上海市生态环境局科研项目上海市环境科学研究院创新基金

22230713500沪环科[2022]4号CX2021200329

2024

10.12153/j.issn.1674-991X.20230677

环境工程技术学报
中国环境科学研究院

环境工程技术学报

CSTPCD北大核心
影响因子：1
ISSN：1674-991X
年,卷(期)：2024.14(2)
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