二级膜分离—冷凝—吸附工艺处理石化罐区废气
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摘要
采用二级膜分离—冷凝—变压吸附工艺回收处理含有高浓度挥发性有机物和苯系物的炼厂罐区外排"呼吸气"。结果表明,进气的非甲烷总烃质量浓度范围41 000～182 000 mg/m~3,进气中苯、甲苯和二甲苯的质量浓度分别为400～1 400 mg/m~3,150～1 600 mg/m~3,300～2 100 mg/m~3时,尾气中非甲烷总烃质量浓度始终低于80mg/m~3,去除率均高于99.9%,苯、甲苯和二甲苯的去除率分别为99.6%、99.6%和99.8%。抗冲击负荷实验将进气量提高50%,尾气中非甲烷总烃质量浓度仍低于80 mg/m~3。二级膜单元可以高效浓缩轻烃,既回收获得可燃气,又解决了轻烃积累所造成的尾气超标难题。
The two-stage membrane separation-condensation-pressure swing adsorption process was used to treat the waste gas containing high concentration VOCs and benzene series from the refinery tank area. The experimental results show that when the total mass concentration of non methane hydrocarbon is 41 000-182 000 mg/m~3,the mass concentration of benzene,toluene and xylene in the feed gas is 400-1 400 mg/m~3,150-1 600 mg/m~3,and 300-2 100 mg/m~3 respectively,the total mass concentration of non methane hydrocarbon in the outlet gas after treatment is less than 80 mg/m~3 with more than 99.9% of the removal rate,and the removal rate of benzene,toluene and xylene is higher than 99.6%,99.6% and 99.8% respectively. When the inflow of waste gas was increased by 50% in the impact load test,the non-methane total hydrocarbon mass concentration in the outlet gas was still below 80 mg/m~3. Light hydrocarbon is efficiently concentrated by the two-stage membrane unit. It is not only can recover the combustible gas,but also solve the problem of excessive exhaust gas caused by the accumulation of light hydrocarbon.
The two-stage membrane separation-condensation-pressure swing adsorption process was used to treat the waste gas containing high concentration VOCs and benzene series from the refinery tank area. The experimental results show that when the total mass concentration of non methane hydrocarbon is 41 000-182 000 mg/m~3,the mass concentration of benzene,toluene and xylene in the feed gas is 400-1 400 mg/m~3,150-1 600 mg/m~3,and 300-2 100 mg/m~3 respectively,the total mass concentration of non methane hydrocarbon in the outlet gas after treatment is less than 80 mg/m~3 with more than 99.9% of the removal rate,and the removal rate of benzene,toluene and xylene is higher than 99.6%,99.6% and 99.8% respectively. When the inflow of waste gas was increased by 50% in the impact load test,the non-methane total hydrocarbon mass concentration in the outlet gas was still below 80 mg/m~3. Light hydrocarbon is efficiently concentrated by the two-stage membrane unit. It is not only can recover the combustible gas,but also solve the problem of excessive exhaust gas caused by the accumulation of light hydrocarbon.
引文
[1]环境保护部,国家质量监督检验检疫总局.石油化学工业污染物排放标准:GB 31571-2015[S].北京:中国环境科学出版社,2015.
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[10]SADRZADEH M,AMIRILARGANI M,SHAHI-DI K,et al.Gas permeation through a synthesized composite PDMS/PES membrane[J].J Membr Sci,2009,342:236-250.
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[12]PODDAR T K,MAJUMDAR S,SIRKAR K K.Membrane-based adsorption of VOCs from a gas stream[J].AICHE,1996,429(11):3267-3282.
[13]RIBEIRO C P,FREEMAN B D.Carbon dioxide/ethane mixed-gas sorption and dilation in a cross-linked poly(ethylene oxide)copolymer[J].Polymer,2010,51:1156-1168.
[14]MULDER M.膜技术基本原理[M].李琳,译.2版.北京:清华大学出版社,1999:74-77.
[15]郝吉明,马广大,王书肖,等.大气污染控制工程[M].3版.北京:高等教育出版社,2010:414-470.
[2]天津市环境保护局,天津市市场和质量监督管理委员会.天津市工业企业挥发性有机物排放控制标准:DB 12/524-2014[S].
[3]阿克木·吾马尔,蔡思翌,赵斌,等.己烷储运行业挥发性有机物排放控制技术评估[J].化工环保,2015,35(1):64-68.
[4]郭森,童莉,周学双,等.石化行业的VOCs排放控制管理[J].化工环保,2014,34(4):356-360.
[5]张晓露,鞠峰栾,辉修光,等.VOCs在活性炭上的动态吸附行为[J].化工环保,2018,38(4):1-9.
[6]毕锦斌,赵精彩.三级冷凝法油气回收工艺流程模拟[J].上海化工,2018,43(6):27-29.
[7]魏忠昕,范美玉,孟令华.冷油吸收法轻烃回收工艺分析与改进[J].石油化工应用,2017,3(12):143-147.
[8]于冰,刘小冕,丛海林,等.聚合物气体分离膜改性及应用进展[J].化工新型材料,2015,43(5):230-239.
[9]任晓灵,任吉中,邓麦村.聚醚共聚酰胺多层复合气体分离膜的制备及其分离性能[J].膜科学与技术,2012,32(2):30-35.
[10]SADRZADEH M,AMIRILARGANI M,SHAHI-DI K,et al.Gas permeation through a synthesized composite PDMS/PES membrane[J].J Membr Sci,2009,342:236-250.
[11]SHOKRIAN M,SADRZADEH M,MOHAMMADIT.C3H8 separation from CH4 and H2 using a synthesized PDMS membrane:experimental and neural network modeling[J].J Membr Sci,2010,346:59-70.
[12]PODDAR T K,MAJUMDAR S,SIRKAR K K.Membrane-based adsorption of VOCs from a gas stream[J].AICHE,1996,429(11):3267-3282.
[13]RIBEIRO C P,FREEMAN B D.Carbon dioxide/ethane mixed-gas sorption and dilation in a cross-linked poly(ethylene oxide)copolymer[J].Polymer,2010,51:1156-1168.
[14]MULDER M.膜技术基本原理[M].李琳,译.2版.北京:清华大学出版社,1999:74-77.
[15]郝吉明,马广大,王书肖,等.大气污染控制工程[M].3版.北京:高等教育出版社,2010:414-470.