“冷凝+膜分离+吸附”组合工艺在油气回收中的应用
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摘要
在储运过程中,汽油、苯类等易挥发性轻质油品挥发的油气除了会导致能源浪费、环境污染以及带来安全隐患以外,还会对人体健康造成更加直接的危害。目前,已投入工业广泛应用的油气回收工艺方法主要有吸收法、膜分离法、冷凝法、吸附法4种。长岭石化结合公路汽车槽车装油出厂特点,经过广泛调研、比对和评审,采用"冷凝+膜分离+吸附"油气回收组合工艺,装置设计能力为300m~3/h(标准)。对配套的集气系统设施进行相应改造,将上装鹤管改造为下装鹤管,装油栈台至油气回收装置的气相管道进行更换,管径由DN100扩大至DN200。运行后多次进行采样化验分析,经装置处理后的尾气非甲烷总烃排放浓度平均约为104.9mg/m~3,平均吸收率98.81%,苯含量3.6mg/m~3,甲苯含量1.7mg/m~3,二甲苯含量3.4mg/m~3,乙苯含量为0,符合GB 31570—2015《石油炼制工业污染物排放标准》的要求;装车区域的异味和油气泄漏也得到彻底根治。
The vapor that volatized from volatile light oil products,such as gasoline and benzene,during storage and transportation does harm to human health in addition to leading to energy dissipation and environ-mental pollution and bringing safety hazards.There are currently four main methods for recovering oil and gas in industrial applications-absorption,membrane separation,condensation and adsorption.Taking the characteristics of oil loading and transportation of tank trucks into consideration,Sinopec Changling Company introduced an oil and gas recovery technology which combines condensation,membrane separation and adsorption after extensive research,comparison and review.The unit has a designed capacity of 300m~3/h(standard).The corresponding gas collection system was also revamped,with the loading arms changed to the lower position from an upper position,the gas-phase pipes between the loading platform and the oil and gas recovery unit being re-placed,and the pipe diameter increased to DN200 from DN100.Multiple sampling and assays were conducted after the unit went into operation.The total non-methane hydrocarbon emission density of the tail gas treated by the unit averaged about 104.9mg/m~3,the average absorption rate was 98.81%,the benzene content was3.6mg/m~3,the methylbenzene content was 1.7mg/m~3,the xylene content was 3.4mg/m~3,and the ethylbenzene content was zero.The unit meets the Pollutant Emission Standard for the Oil Refining Industry GB 31570 —2015.There was no longer abnormal smell or oil or gas leak in the loading area as well.
The vapor that volatized from volatile light oil products,such as gasoline and benzene,during storage and transportation does harm to human health in addition to leading to energy dissipation and environ-mental pollution and bringing safety hazards.There are currently four main methods for recovering oil and gas in industrial applications-absorption,membrane separation,condensation and adsorption.Taking the characteristics of oil loading and transportation of tank trucks into consideration,Sinopec Changling Company introduced an oil and gas recovery technology which combines condensation,membrane separation and adsorption after extensive research,comparison and review.The unit has a designed capacity of 300m~3/h(standard).The corresponding gas collection system was also revamped,with the loading arms changed to the lower position from an upper position,the gas-phase pipes between the loading platform and the oil and gas recovery unit being re-placed,and the pipe diameter increased to DN200 from DN100.Multiple sampling and assays were conducted after the unit went into operation.The total non-methane hydrocarbon emission density of the tail gas treated by the unit averaged about 104.9mg/m~3,the average absorption rate was 98.81%,the benzene content was3.6mg/m~3,the methylbenzene content was 1.7mg/m~3,the xylene content was 3.4mg/m~3,and the ethylbenzene content was zero.The unit meets the Pollutant Emission Standard for the Oil Refining Industry GB 31570 —2015.There was no longer abnormal smell or oil or gas leak in the loading area as well.
引文
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[6]陈家庆.油气回收与排放控制技术[M].北京:中国石化出版社,2010.
[7]龚朝兵,闫乃峰,花飞.油气回收集成工艺的应用浅析[J].中外能源,2014,19(11):90-94.
[8]谭胜.油气回收技术的应用与比较[J].当代化工,2008,37(1):35-37.
[9]相永星.油气回收装置[C]//长炼科技报告文集(第一册1971-1986),1986:193-199.
[10]黄伟良.膜分离技术在油气回系统的工业应用[J].石油化工安全环保技术,2011,27(6):42-45.
[11]姜国新.冷凝膜油气回收技术在轻质油汽车装车中的应用[J].安全健康和环境,2012,12(3):30-32.
[12]刘勇峰,吴明,吕霞.油气回收技术发展现状及趋势[J].现代化工,2011,31(3):21-23.
[13]黄维秋,王丹莉,李峰,等.油气回收技术的研究进展与研究重点[J].油气储运,2012,31(9):641-646.
[2]田士良.炼油厂油品储运技术与管理[M].北京:中国石化出版社,1995.
[3]梁琳林,何仁,姚宇伟,等.油罐车油气蒸发损失与控制方法[J].油气储运,2010,29(6):470-472.
[4]黄维秋,林毅,刘海,等.油气回收技术的应用研究[J].中外能源,2006,11(5):85-89.
[5]GB 31570—2015石油炼制工业污染物排放标准[S].2015.
[6]陈家庆.油气回收与排放控制技术[M].北京:中国石化出版社,2010.
[7]龚朝兵,闫乃峰,花飞.油气回收集成工艺的应用浅析[J].中外能源,2014,19(11):90-94.
[8]谭胜.油气回收技术的应用与比较[J].当代化工,2008,37(1):35-37.
[9]相永星.油气回收装置[C]//长炼科技报告文集(第一册1971-1986),1986:193-199.
[10]黄伟良.膜分离技术在油气回系统的工业应用[J].石油化工安全环保技术,2011,27(6):42-45.
[11]姜国新.冷凝膜油气回收技术在轻质油汽车装车中的应用[J].安全健康和环境,2012,12(3):30-32.
[12]刘勇峰,吴明,吕霞.油气回收技术发展现状及趋势[J].现代化工,2011,31(3):21-23.
[13]黄维秋,王丹莉,李峰,等.油气回收技术的研究进展与研究重点[J].油气储运,2012,31(9):641-646.