油气行业VOCs泄漏数据分析及探讨  

Analysis and Discussion on VOCs Leakage Data in the Oil and Gas Industry

作　　者：任佶 马东哲 袁野 闫志坤 Ren Ji;Ma Dongzhe;Yuan Ye;Yan Zhikun(Water Environmental Protection Research Institute,Water Affairs Company of Daqing Oilfield)

机构地区：[1]大庆油田水务公司水务环保研究院

出　　处：《油气田环境保护》2024年第5期34-37,49,共5页Environmental Protection of Oil & Gas Fields

摘　　要：油气行业是VOCs污染的重要排放源,其中,设备与管线组件泄漏逸散是VOCs污染的重点排放源项,泄漏检测与修复(LDAR)是实施VOCs无组织排放污染管控的重要手段。文章选取某油田油气集输站、油气处理站为样本,通过实施LDAR检测,对典型场站泄漏设备与管线组件密封点类型、泄漏数量及泄漏率等进行分析。选取阀门、连接件两种类型泄漏密封点,采用包袋-吹扫法对泄漏密封点VOCs排放速率进行了实测,参考我国石化行业核算系数,应用相关方程法对泄漏密封点VOCs排放速率进行核算。结果表明,泄漏密封点VOCs排放速率核算结果比实测结果偏大(为实测结果的1.73~2.72倍)。考虑到油气行业在产业结构、工艺流程、原辅料使用、物料状态等方面与石化行业存在较大差异,建议通过修正相关方程法排放系数,形成符合我国油气行业实际情况的设备与管线组件VOCs泄漏排放速率核算体系,提高油气行业VOCs泄漏排放量核算的准确性。The oil and gas industry is a significant source of VOCs(volatile organic compounds)pollution,with equipment and pipeline component leakage being a key emission source of VOCs.Leak Detection and Repair(LDAR)is an essential method for controlling fugitive VOCs emissions.This article selectd a gathering station and a processing station in a specific oilfield as samples and analyzed the types of sealing points,the amount of leakage,and the leakage rates of devices and pipeline components through LDAR detection.By selecting valve and connector types as the leaking sealing points,the bagging-purging method was used to measure the VOCs emission rates of the leaking sealing points.Referring to the accounting coefficients of the petrochemical industry in China,the relevant equation method was applied to calculate the VOCs emission rates of the leaking sealing points.The results show that the calculated VOCs emission rates of the leaking sealing points are higher than the measured results(1.73 to 2.72 times the measured results).Considering the significant differences between the oil and gas industry and the petrochemical industry in terms of industrial structure,process flow,usage of raw and auxiliary materials,and material states,it is recommended to revise the emission coefficients in the relevant equation method to develop an accounting system for VOCs leakage emission rates of equipment and pipeline components that aligns with the actual conditions of the oil and gas industry in China,thereby improving the accuracy of VOCs leakage emission calculations in the oil and gas industry.

关 键 词：VOCS 泄漏检测 修复 排放速率 核算 

分 类 号：X831[环境科学与工程—环境工程]