共查询到20条相似文献,搜索用时 93 毫秒
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通过共轭梯度算法和BP神经网络对精馏过程进行软测量建模.依据工艺原理和经验知识,初选了精馏塔顶产品组成的神经网络输入变量,运用主元分析法对变量进行主元分解,降低了变量维数,并且消除了变量之间的相关性,最后对网络进行了训练与测试.仿真结果表明,该模型具有较快的收敛速度,较高的精度,可以满足大规模生产诊断的要求. 相似文献
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本文以某300kt乙烯塔精馏控制为目的,以各种建模方法、软测量推断控制和预测控制为基础,探讨了针对具体工业过程的实际应用。具体研究了精馏过程对控制的要求和影响,以及径向基函数神经网络和PLS-RBF算法的建模方法,并以此建立了两个乙烯出塔浓度的软测量模型。 相似文献
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ASPEN PLUS在甲醇加压精馏塔中的应用 总被引:1,自引:0,他引:1
应用Aspen化工模拟软件对甲醇主精馏塔进行了模拟计算,算出主精馏塔的最小回流比和最小理论板数,进而做出全塔的浓度和温度分布,为生产实际提供参考. 相似文献
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将多方向主元分析(MPCA)理论应用到一个实际的PVC间歇反应过程的性能监测与故障诊断中。由于间歇反应的特点,数据具有多维性,应用传统的主元分析将使过程的统计建模与故障诊断难以实现。MPCA可将间歇过程的多维数据沿时间轨迹分割,使得多批次的数据可以在各时间序列轨迹上建立相应的PCA模型,从而完成对间歇过程的实时监视及故障诊断。 相似文献
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通过对规整填料塔与板式塔的特点进行分析,运用规整填料的低压降、大通量、高效率等特点,以及板式塔的操作稳定性结合在甲烷氯化物精馏塔的改造,通过流程模拟结果及创新性的采用填料与塔板复合的型式,结合填料塔与浮阀塔各自优点形成组合塔,优化了精馏塔运行。 相似文献
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Kulov N. N. Polkovnichenko A. V. Lupachev E. V. Rastunova I. L. Magomedbekov E. P. 《Theoretical Foundations of Chemical Engineering》2020,54(3):389-396
Theoretical Foundations of Chemical Engineering - An experimental packed fractionating column was designed to study the process of separation of water hydrogen and oxygen isotopes, including the... 相似文献
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模拟蒸馏技术在汽油馏程分析中的应用 总被引:1,自引:0,他引:1
利用气相色谱,采用非极性毛细管柱分离,用安捷伦7683B系列自动进样器进样,对汽油的馏程进行快速的测定,并对影响汽油快速模拟蒸馏分析的因素进行了考察。结果表明:快速模拟蒸馏目前可以适用于炼油中控里的直馏汽油,重整汽油,催化汽油等的等馏程的分析。 相似文献
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Heloisa Ramlow Carolina D'vila Kramer Cavalcanti Ricardo Antonio Francisco Machado Andrea Cristiane Krause Bierhalz Cintia Marangoni 《化学工程与技术》2019,42(5):1045-1052
The influence of dye class and chromogen groups of dyeing wastewaters composed by reactive or disperse dyes with different colors on direct contact membrane distillation (DCMD) was investigated. The state‐of‐the‐art shows that disperse dyes and different dye colors are not studied in DCMD and the application of DCMD for dyeing wastewater treatment is limited to a few publications. High color rejection was obtained and water was recovered at the permeate side for feed solutions containing reactive or disperse dye. Influence of chromogen groups (colors) was not observed, whereas the class dye was decisive for the process performance. Reactive dyes showed higher mean permeate flux due to the repulsion between their anionic groups and the negative surface of the membrane. Partial wetting of larger pores allowed the passage of small disperse dye molecules, reducing color rejection. 相似文献
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利用夹点技术对常减压蒸馏换热网络进行分析,优化该常减压蒸馏装置换热网络结构,最大限度的回收热量,节能效果显著。 相似文献
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Emel’yanov I. I. Ziyatdinov N. N. Lapteva T. V. Ryzhova A. A. Semin R. V. 《Theoretical Foundations of Chemical Engineering》2021,55(6):1133-1151
Theoretical Foundations of Chemical Engineering - Decomposition NLP/LP/NLP methods are considered for the automated process design of the economically optimal distributed heat exchange networks... 相似文献
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Retrofitting of the Heat Exchanger Network with Steam Generation in a Crude Oil Distillation Unit 下载免费PDF全文
Steam generation through hot streams has an important impact on the utility consumption of a crude oil distillation unit. Retrofitting of the heat exchanger network with steam generation in a crude oil distillation unit is studied with regard to efficient energy usage. The grand composite curve is employed to provide insights into the steam generation problem, and a mixed‐integer linear programming model, presented previously for heat integration through hot discharges/feeds and steam generation, is used to obtain the optimal parameters for steam generation. Three heuristic rules are then proposed to determine suitable hot streams for steam generation. Finally, the heat exchanger network is modified based on pinch technology. After the retrofit, the hot and cold utility decrease. 相似文献