共查询到20条相似文献,搜索用时 218 毫秒
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以C8芳烃混合物的吸附分离过程作为研究对象, 应用多目标教学优化算法(multi-objective teaching-learning-based optimization algorithm, MOTLBO)对模拟移动床多目标优化问题进行求解。采用TMB方法, 建立了模拟移动床模型, 并对两个典型的模拟移动床多目标操作优化问题进行了优化设计。通过与NSGA-Ⅱ算法的比较, 证明了多目标教学优化算法在求解模拟移动床多目标优化问题上的有效性和优势。此外, 还分析了抽出液流量、抽余液流量以及步进时间等对多目标优化非劣解的影响, 优化结果为模拟移动床分离过程的工艺设计和操作提供了依据。 相似文献
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针对乙二胺-水共沸物组成对压力较为敏感的特性,采用部分热集成变压精馏工艺分离该共沸物。先利用Aspen Plus软件对该工艺进行稳态模拟,再以理论塔板数、进料位置、回流比为优化变量,水和乙二胺的纯度为约束,以年度总费用(total annual cost,TAC)为目标函数建立乙二胺-水共沸体系分离系统的优化设计模型。采用列队竞争算法对该分离过程主要工艺参数进行优化,得到了变压精馏分离乙二胺-水体系的最佳工艺操作参数及设备参数。模拟结果表明,利用算法对多变量进行同时优化可得到更具经济效益的分离系统,与传统优化结果相比,可降低TAC约7.31%。在此基础上,对高压塔的操作压力进行优化分析,将其由2atm提升至4atm(1atm=101325Pa),并对流程其他参数进行优化,可显著降低TAC约24.62%。进一步,采用部分热集成比普通变压双塔精馏降低TAC约21.87% 相似文献
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采用管壳式合成反应器和C207催化剂,建立了联醇合成工艺模型,并借助稳态模拟计算软件对联醇合成工艺系统进行过程模拟。利用化工稳态软件,对具有不同位置废热锅炉的合成工艺系统的流程合理性、能源利用效率和有效能效率进行了分析和计算,使联醇合成工艺在能量利用方面得到了初步优化。 相似文献
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在UniSim软件模拟系统中,对某天然气处理过程进行流程模拟,搭建天然气处理系统稳态模型,并在此基础上,以最小化能耗为目标,进行操作参数优化.结果表明:UniSim具有良好的模拟环境,能够得到准确的天然气处理系统的稳态模型.基于所建稳态模型的操作参数优化,使全装置能耗降低了6%,每年平均成本节约了48.5万元. 相似文献
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MOLECULAR MODELING AND OPTIMIZATION FOR CATALYTIC REFORMING 总被引:2,自引:0,他引:2
In this paper, molecular modeling and optimization for the naphtha catalytic reforming process is studied. The catalytic reforming process is for producing high octane number gasoline by reforming reactions in three sequencing fixed bed reactors. Feed naphtha coming from an atmospheric distillation unit consisted of molecules from C5 to C10 including paraffin, iso-paraffin, naphthene, and aromatic. The molecular reaction network consisted of paraffin cracking, naphthene side-chain cracking, aromatic side-chain cracking, ring opening, ring closure, paraffin isomerization, dehydrogenation, and hydrogenation. A molecular model for catalytic reforming was built. On the basis of the simulation model, a process optimization was performed for feed temperature and pressure under constraints such as benzene content, aromatic content, and RON (Research Octane Number) limitations. High RON was contrasted to low benzene and aromatic content requirements. By optimizing and controlling the reaction pathway, we can obtain a final product with the highest profit and appropriate benzene and aromatic contents and RON value. This example shows significant benefits from applying molecular modeling to optimization in the process level. Since gasoline production is related to many different processes such as reforming, FCC, isomerization, alkylation, and so on, more benefits can be obtained by applying molecular modeling to plant-wide optimization. 相似文献
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In this paper, molecular modeling and optimization for the naphtha catalytic reforming process is studied. The catalytic reforming process is for producing high octane number gasoline by reforming reactions in three sequencing fixed bed reactors. Feed naphtha coming from an atmospheric distillation unit consisted of molecules from C5 to C10 including paraffin, iso-paraffin, naphthene, and aromatic. The molecular reaction network consisted of paraffin cracking, naphthene side-chain cracking, aromatic side-chain cracking, ring opening, ring closure, paraffin isomerization, dehydrogenation, and hydrogenation. A molecular model for catalytic reforming was built. On the basis of the simulation model, a process optimization was performed for feed temperature and pressure under constraints such as benzene content, aromatic content, and RON (Research Octane Number) limitations. High RON was contrasted to low benzene and aromatic content requirements. By optimizing and controlling the reaction pathway, we can obtain a final product with the highest profit and appropriate benzene and aromatic contents and RON value. This example shows significant benefits from applying molecular modeling to optimization in the process level. Since gasoline production is related to many different processes such as reforming, FCC, isomerization, alkylation, and so on, more benefits can be obtained by applying molecular modeling to plant-wide optimization. 相似文献
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重整C+10重芳烃的综合利用 总被引:3,自引:1,他引:3
重芳烃是一种重要的化工原料 ,对近年来催化重整C 10 重芳烃的综合利用进行了介绍 ,介绍了用C 10 重芳烃生产高沸点芳烃溶剂油、均四甲苯、石油萘、石油甲基萘、苯、甲苯、二甲苯等产品 ,并对C 10 重芳烃深加工工艺进行了简单介绍 ,对国内与国外重芳烃轻质化技术进行了对比 ,建议在C 10 重芳烃利用方面 ,加快技术创新 ,使C 10 重芳烃资源得到充分的利用。 相似文献
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Yong Heon Kim Ki-Won Jun Hyunku Joo Chonghun Han In Kyu Song 《Chemical engineering journal (Lausanne, Switzerland : 1996)》2009,155(1-2):427-432
A simulation study on gas-to-liquid (natural gas to Fischer–Tropsch synthetic fuel) process was carried out in order to find optimum reaction conditions for maximum production of synthetic fuel. Optimum operating condition for GTL (gas-to-liquid) process was determined by changing reaction variable such as temperature. During the simulation, overall synthetic process was assumed to proceed under steady-state conditions. It was also assumed that physical properties of reaction medium were governed by RKS (Redlich–Kwong–Soave) equation. ATR (auto-thermal reforming) in synthesis gas production unit and slurry phase reaction over Co-based catalyst in FTS (Fischer–Tropsch synthesis) unit were considered as reaction models for GTL process. The effect of reaction temperature on CO conversion and C5–C20 hydrocarbon yield in FTS unit was mainly examined. Simulation and experimental results showed that optimum reaction temperature in FTS unit was 255 °C. Simulation results were also compared to experimental results to confirm the reliability of simulation model. Simulation results were reasonably well matched with experimental results. 相似文献
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轻烃蒸汽转化制氢HYSYS软件全流程模拟 总被引:1,自引:0,他引:1
轻烃蒸汽转化制氢作为目前国内外比较成熟的制氢技术之一使用很广泛,通过HYSYS软件对榆林炼油厂20 000 m~3/h天然气蒸汽转化制氢进行全流程模拟,详细介绍了装置各工序流程模拟过程中模块的建立过程及方法,并结合现场实际参数对全流程模拟进行优化设置,将全流程模拟的原料适用范围扩展至炼厂副产的轻烃类混合物,使得此流程模拟计算在以轻烃蒸汽转化制氢工艺技术的设计过程中通用,并对使用轻烃蒸汽转化制氢工艺技术的生产装置在开工和生产阶段提供可靠的动态参考数据。 相似文献
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原油常减压蒸馏塔的流程模拟 总被引:3,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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由于煤液化油石脑油馏分(200℃)中芳烃潜含量较高,利用煤液化油石脑油馏分为原料,进行加氢精制,将原料中的硫氮含量降至1 mg/kg左右,满足重整进料要求,然后在小型固定床连续反应器上进行加氢重整生产芳烃试验。着重考察重整反应前、后族组成的变化及主要芳烃化合物的产率。结果表明,加氢重整过程中发生正构烷烃异构化反应;环烷烃主要发生脱氢芳构化反应转化为芳香烃;煤液化油石脑油馏分适宜进行催化重整,C_1~C_4烃气产率6.03%,氢气产率3.60%;重整后,芳烃含量达83.20%,其中C_6~C_8芳烃含量61.03%,是提取BTX的良好原料。石脑油的馏程对芳烃的组成和产率有一定影响,适宜的馏程为60~160℃。 相似文献
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对发展国内C10重芳烃深加工的分析与建议 总被引:4,自引:0,他引:4
介绍了C10重芳烃原料的来源和状况,重点对国内C10重芳烃深加工装置的生产工艺进行了综述,并与国外有关的先进技术进行了对比;对重芳烃产品市场情况进行了比较详细的分析和预测,并提出了C10重芳烃综合利用的建议。 相似文献