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安庆石化应用ASPEN PLUS软件,建立Ⅰ套常减压装置模型,运用灵敏度分析工具,对装置进行模拟优化,将优化结果应用于生产,取得较好的应用效果. 相似文献
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采用Aspen Plus软件对常减压蒸馏装置进行流程模拟计算,获得了各产品的温度、流量等关键参数及产品的馏程曲线,并与实际数据对比,二者吻合良好。分析了温度沿塔板的分布,运用灵敏度分析工具对相关参数进行优化,并将优化结果应用于实际生产,获得良好的应用效果。 相似文献
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介绍在当前市场对柴油需求不断增长的前提下,通过对炼油厂常减压装置侧线产品的分析,提出常减压蒸馏装置流程的优化改造方案,将常四线油通过减二线中段回流并入减压塔的实施,在保证其他侧线产品质量合格的前提下,实现增产柴油的目的,同时通过后续工艺流程的优化调整,有助于提高常减压装置换热终温,降低装置加热炉燃料消耗,提高装置运行的... 相似文献
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原油常减压蒸馏塔的流程模拟 总被引:2,自引:1,他引:2
常减压蒸馏装置是炼油加工的第一道工序,它的运行状况对后续装置乃至全厂都有着重要影响。针对初馏塔、常压蒸馏塔和减压蒸馏塔的稳态流程模拟,选取适合的蒸馏塔中段循环设定变量和减压塔模拟方法,最终流程模拟结果与实际工艺参数相似度极高,说明常减压蒸馏塔的流程模拟能够如实体现实际工艺状态,可以作为指导工艺生产、操作优化的有效方法。 相似文献
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常减压装置将原油切割为不同中间产品,其作为炼油工艺的龙头装置,对炼油过程生产计划排产与效益提升至关重要。通过建立一种高精度且具有良好求解效率的常减压模型,用以求解模型关键指标实沸点(TBP)曲线,即综合考虑切割产品的实沸点(TBP)与原油TBP、流量、温度等变量影响,构建非线性方程组模型来表征输入输出间的关系;利用特征选择方法遴选相关变量(包括进料性质、相邻TBP及其二次项等),并采用鲸鱼优化算法优化方程组系数。仿真结果表明,该多输出相互关系模型与已有文献工作相比,在兼顾求解效率基础上,常减压装置各蒸馏切割产品TBP曲线预测上有更高的精度,将此模型应用到炼厂计划优化中,与传统的悬摆切割模型对比,优化结果优于传统悬摆切割模型。 相似文献
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Fupei Li Feng Qian Minglei Yang Wenli Du Vladimir Mahalec 《American Institute of Chemical Engineers》2021,67(2):e17115
Accuracy of a crude distillation unit (CDU) model has a significant impact on refinery production planning. High accuracy is typically accomplished via nonlinear models which causes convergence difficulties when the entire refinery model is optimized. CDU model presented in this work is a mixed-integer linear model with a modest number of binary variables; its accuracy is on par with rigorous tray to tray CDU models. The model relies on the observation12 that a line through the middle of the product true boiling point (TBP) curve depends on the crude feed properties and the yields of the adjacent products. Novelty of the product tri-section CDU model is that it does not require models of individual distillation towers comprising the CDU, thereby leading to a much simpler model structure. Significant reduction in the computational effort required for the optimization of nonlinear refinery models is illustrated by comparison with previous work. 相似文献
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针对流程工业实际调度过程中存在的调度执行滞后、装置不完全利用以及生产资源浪费等问题,提出一种基于仿真的闭环调度优化方法,该方法具有多层次建模、分层调度优化及闭环校正等特点. 相似文献
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Production planning models generated by common modeling systems do not involve constraints for process operations, and a solution optimized by these models is called a quasi-optimal plan. The quasi-optimal plan cannot be executed in practice some time for no corresponding operating conditions. In order to determine a practi- cally feasible optimal plan and corresponding operating conditions of fluidized catalytic cracking unit (FCCU), a novel close-loop integrated strategy, including determination of a quasi-optimal plan, search of operating conditions of FCCU and revision of the production planning model, was proposed in this article. In the strategy, a generalized genetic algorithm (GA) coupled with a sequential process simulator of FCCU was applied to search operating conditions implementing the quasi-optimal plan of FCCU and output the optimal individual in the GA search as a final genetic individual. When no corresponding operating conditions were found, the final genetic individual based correction (FGIC) method was presented to revise the production planning model, and then a new quasi-optimal production plan was determined. The above steps were repeated until a practically feasible optimal plan and corresponding operating conditions of FCCU were obtained. The close-loop integrated strategy was validated by two cases, and it was indicated that the strategy was efficient in determining a practically executed optimal plan and corresponding operating conditions of FCCU. 相似文献
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通过工艺流程、设备、运行等方面的分析,对综合法和中压法生产稀硝酸进行比较,证实中压法生产稀硝酸在工艺上较完善,设备投资省,运行费用低。通过实际运行,40 kt/a中压法稀硝酸生产装置各项消耗指标均优于综合法。 相似文献
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In chemical manufacturing processes, equipment degradation can have a significant impact on process performance or cause unit failures that result in considerable downtime. Hence, maintenance planning is an important consideration, and there have been increased efforts in scheduling production and maintenance operations jointly. In this context, one major challenge is the inherent uncertainty in predictive equipment health models. In particular, the probability distribution associated with the stochasticity in such models is often difficult to estimate and hence not known exactly. In this work, we apply a distributionally robust optimization (DRO) approach to address this problem. Specifically, the proposed formulation optimizes the worst-case expected outcome with respect to a Wasserstein ambiguity set, and we apply a decision rule approach that allows multistage mixed-integer recourse. Computational experiments, including a real-world industrial case study, are conducted, where the results demonstrate the significant benefits from binary recourse and DRO in terms of solution quality. 相似文献
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介绍建设4.5万t/a联醇装置同时副产低压蒸汽新工艺设计概况。该工程具有投资省,建设快,节能降耗和回收余热资源等特点。 相似文献
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基于分布式能源的工业园区能源规划 总被引:1,自引:0,他引:1
分布式热电联产的能源系统在经济效益、能效和碳减排方面都有较大的优势,因此,针对目前工业园中普遍存在的能量利用效率低、温室气体排放严重等问题,本文建立了基于分布式能源的工业园区综合能源规划模型。根据园区的热、电、蒸汽、冷等各个时段的负荷需求、当地的可利用资源以及备选的能源转换技术,以最小化规划期内整个园区系统的总费用最少为目标,确定出园区内能源转换装置的类型和尺寸、各种能源的供应量及CO2排放量。同时将本文所建立的模型用于求解某工业园区的能源规划问题,验证了其有效性。 相似文献