耦合加氢反应动力学和FCC杂质分配作用的生物质油与蜡油共炼过程的操作优化

Operational Optimization for Co-Processing of Bio-Oil and Vacuum Gas Oil Integrating Hydrogenation Reaction Kinetics and Impurity Distributions of FCC

为降低生物质油和蜡油共炼过程的能耗和氢耗,提出了耦合加氢反应动力学和催化裂化(FCC)装置杂质分配作用的共炼过程操作优化模型,将优化模型应用于生物质油和蜡油的共炼过程。结果表明:基于加氢反应动力学,可优化各加氢装置的操作条件进而降低过程的公用工程消耗量;而通过耦合FCC装置对杂质的分配作用,可将更多的难脱除含硫杂质和含氮杂质在操作条件相对苛刻的蜡油加氢装置中脱除,即降低了后续汽柴油加氢装置中的难脱除杂质含量,从而缓和了汽柴油加氢装置的操作条件。通过优化,生物质油和蜡油共炼过程的操作费用从178.69×10^(6) CNY/a降低至174.71×10^(6) CNY/a,降低幅度为2.23%。因此,在考虑对共炼过程优化时,需要考虑加氢装置的加氢反应动力学和FCC装置的杂质分配能力。

To reduce energy and hydrogen consumption of co-processing process of bio-oil and vacuum gas oil,an operational optimization model integrating hydrogenation reaction kinetics and impurities distribution of fluid catalytic cracking(FCC)unit for the co-processing process was proposed.With applying the proposed model into a co-processing process of bio-oil and vacuum gas oil,operating conditions of hydrogenation(HDT)units can be optimized to reduce the utility consumption.By integrating FCC impurities distribution,hard removal impurities,sulfides and nitrides can be removed in VGO HDT unit with more severe conditions.This means gasoline and diesel contain easy removal impurities.Under the above conditions,operational conditions for HDT units of gasoline and diesel can be less severe.Total operation cost can be reduced from 178.69×10^(6) CNY/a to 174.71×10^(6) CNY/a with 2.23%reduction.Therefore,hydrogenation reaction kinetics and FCC impurities distribution should be considered when optimizing the co-processing process.