重整分离器数学模拟模型的建立和应用
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摘要
阐述了重整反应产物分离器数学模拟模型的建立原理,介绍了重整反应各集总组分适用的应用于含氢烃类物系的气-液相平衡模型,并指出了该模型使用的关键问题,提出了该模型中简便实用的R-K状态方程气相压缩因子的解法和步骤。建立了用于工程设计的重整反应产物分离器数学模拟模型,并与文献中重整分离器仿真模型的数据进行了对比。该分离器数学模拟模型的计算结果与2组重整分离器工业数据进行了比较,模型计算的气相产物组成、液相产物组成、气相产物流量及液相产物流量的最大相对偏差分别为2.60%,5.59%,0.65%和0.48%,上述各项最大相对偏差均低于文献重整分离器仿真模型计算的结果。该分离器数学模拟模型已置于连续重整反应模拟计算软件包中并用于4套超低压连续重整装置的可行性研究。
The principles for the build-up of mathematical simulation model of separator for the catalytic reforming reaction product are described. The gas-liquid phase equilibrium model for hydrogen-containing hydrocarbon systems suitable for the lumped components of reforming reaction is introduced. The critical issues in application of this model are pointed out. A simple and practical method for solving the gas phase compression factor of the R-K equation of state in this model is proposed. A simulation model of reforming reaction product separator for engineering design is established, and the calculation results of the separator simulation model are compared with the commercial data of two groups of reformer separators. For the composition of gas phase products, the maximum relative deviation of the model calculation is 2.60%; for the composition of liquid phase products, the maximum relative deviation of the model calculation is 5.59%; for the flow rate of gas phase products, the maximum relative deviation of the model calculation is 0.65%; for the flow rate of liquid phase products, the maximum relative deviation of the model calculation is 0.48%. The maximum relative deviations of the above are lower than those calculated by the simulation model for reforming separators in literature. The mathematical simulation model of separator has been successfully put into the simulation calculation software package of continuous reforming reaction and used in feasibility study of four ultra-low pressure continuous catalytic reforming units.
The principles for the build-up of mathematical simulation model of separator for the catalytic reforming reaction product are described. The gas-liquid phase equilibrium model for hydrogen-containing hydrocarbon systems suitable for the lumped components of reforming reaction is introduced. The critical issues in application of this model are pointed out. A simple and practical method for solving the gas phase compression factor of the R-K equation of state in this model is proposed. A simulation model of reforming reaction product separator for engineering design is established, and the calculation results of the separator simulation model are compared with the commercial data of two groups of reformer separators. For the composition of gas phase products, the maximum relative deviation of the model calculation is 2.60%; for the composition of liquid phase products, the maximum relative deviation of the model calculation is 5.59%; for the flow rate of gas phase products, the maximum relative deviation of the model calculation is 0.65%; for the flow rate of liquid phase products, the maximum relative deviation of the model calculation is 0.48%. The maximum relative deviations of the above are lower than those calculated by the simulation model for reforming separators in literature. The mathematical simulation model of separator has been successfully put into the simulation calculation software package of continuous reforming reaction and used in feasibility study of four ultra-low pressure continuous catalytic reforming units.
引文
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[2] 胡润彪,胡永有,吴俊,等.重整分离器建模与仿真[J].浙江工程学院学报,2004,21(1):25-28.
[3] CHAO K C,SEADER G D.A General Correlation of Vapor Liquid Equilibria in Hydrocarbon Mixture[J].AIChE J,1961,7(4):598.
[4] 韩祟仁.加氢裂化工艺与工程[M].北京:中国石化出版社,2001:528.
[5] 方向晨.加氢裂化工艺与工程[M].2版.北京:中国石化出版社,2017:665.
[6] 郭天民.多元气-液平衡和精馏[M].北京:石油工业出版社,2002:97,177-180.
[7] POLING B E,PRAUSNITZ J M,O’CONNELL J P.The Properties of Gases and Liquids[M].5th ed.New York:McGraw-Hill,2001:45.
[8] 李大东,聂红,孙丽丽.加氢处理工艺与工程 [M].2版.北京:中国石化出版社,2016:807.
[9] 马爱增,徐又春,杨栋.石脑油超低压连续重整成套技术开发与应用[J].石油炼制与化工,2013,44(4):5.