冷凝吸附法深度回收草甘膦尾气中氯甲烷
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摘要
针对现有草甘膦车间排放尾气中氯甲烷含量过高的问题,在工厂原冷凝回收流程的基础上增加了变压吸附装置,对排放尾气进行了深度回收处理。新建吸附装置产品气中氯甲烷含量可达75%,再经冷凝回收后,尾气中氯甲烷回收率可达99.9%,成功实现排放尾气中的氯甲烷含量低至200ppm。大大降低了VOCs排放量和大气污染,改善了环境质量;另一方面则是资源化回收利用氯甲烷,通过工艺改造,对草甘膦行业实现清洁生产、降低成本、提高市场竞争力发挥重要的作用。
In view of the fact that the content of chloromethane in the tail gas of glyphosate plant is too high,on the basis of the original condensation recovery process,a PSA(pressure swing adsorption)unit was added to the tail gas for deep recovery treatment.The content of chloromethane in the product of the adsorption unit can reach 75%,and after the condensation recovery,the recovery rate of chloromethane in the tail gas can reach 99.9%,and the content of the chloromethane in the tail gas is reduced to 200 ppm.It can not only greatly reduce the VOCs emissions and air pollution,improve the environmental quality,but also realize resources recovery of chloromethane;It plays an important role in realizing green production,reducing costs and improving market competitiveness of glyphosate industry through technological modification.
In view of the fact that the content of chloromethane in the tail gas of glyphosate plant is too high,on the basis of the original condensation recovery process,a PSA(pressure swing adsorption)unit was added to the tail gas for deep recovery treatment.The content of chloromethane in the product of the adsorption unit can reach 75%,and after the condensation recovery,the recovery rate of chloromethane in the tail gas can reach 99.9%,and the content of the chloromethane in the tail gas is reduced to 200 ppm.It can not only greatly reduce the VOCs emissions and air pollution,improve the environmental quality,but also realize resources recovery of chloromethane;It plays an important role in realizing green production,reducing costs and improving market competitiveness of glyphosate industry through technological modification.
引文
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[15]陈学军,王群孝,陈晓祥,等.亚磷酸二甲酯尾气中氯甲烷回收的工艺实践[J].农药,1998,37(6):19-20.
[16]梁军,王少楠,谭成波,等.一种从草甘膦合成尾气中回收一氯甲烷的方法[P].中国专利:CN106966857,2017-07-21.
[17]傅志远.可燃性混合气体(蒸气)安全含氧量研究[D].山西:中北大学,2005.
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[2]任不凡.草甘膦及副产氯甲烷回收新工艺研究[D].浙江:浙江工业大学,2005.
[3]康志鹏,李保军,贺高红,等.尾气中氯甲烷深度回收方法的比较[J],石油化工,2011,40(11):1220-1224.
[4]康志鹏.氯甲烷尾气深度回收方法的比较与优化[D].辽宁:大连理工大学,2011.
[5]杨招艺.氯甲烷尾气综合回收工艺设计与优化[D].辽宁:大连理工大学,2015.
[6]冯智星,余炳林,胡勇,等.有机废气(VOC)处理技术[J].广东科技,2008(14):3-5.
[7]Dunn R F,EI-Halwagi M M.Optimal Design of Multicomponent VOC Condensation Systems[J].J Hazard Mater,1994,38(1):187-206.
[8]Liu Yujin,Feng Xianshe,Lawless D.Separation of Gasoline Vapor from Nitrogen by Hollow Fiber Composite Membranes for VOC Emission Control[J].J MembrSci,2006,271(1/2):114-124.
[9]吴国权.氯甲烷回收过程的建模与分析[D].浙江:浙江工业大学,2010.
[10]吴华.气体膜分离技术在制氢装置的应用[J].炼油技术与工程,2008,38(7):12-15.
[11]王保国.膜分离材料分子设计及其在石化工业的应用进展[J].石油化工,2010,39(9):953-959.
[12]Baker R W,Kaschemekat J H,Wijmans J G.The Design of Membrance Vapor-Gas Separation Systems[J].J MembrSci,1998,151(1):55-62.
[13]黄明富,李国庆,李亚军,等.吸收稳定系统稳定塔侧线汽油作补充吸收剂[J].炼油技术与工程,2008,38(11):22-25.
[14]卢光明,陈俊豪,闵文武.乙苯脱氢制苯乙烯的脱氢尾气吸收工艺的研究[J].石油化工,2010,39(9):1036-1039.
[15]陈学军,王群孝,陈晓祥,等.亚磷酸二甲酯尾气中氯甲烷回收的工艺实践[J].农药,1998,37(6):19-20.
[16]梁军,王少楠,谭成波,等.一种从草甘膦合成尾气中回收一氯甲烷的方法[P].中国专利:CN106966857,2017-07-21.
[17]傅志远.可燃性混合气体(蒸气)安全含氧量研究[D].山西:中北大学,2005.
[18]万成略,汪莉.可燃性气体含氧量安全限值的探讨[J].中国安全科学学报,1999,9(1):48-53.
[19]张增亮,李革梅.可燃气体的爆炸极限和最大允许氧含量的测定及影响因素研究[J].湘潭师范学院学报(自然科学版),2006,28(3):66-69.