共查询到20条相似文献,搜索用时 62 毫秒
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利用化工过程模拟软件Aspen plus,模拟了乙烯裂解焦油的精馏过程,优化了各精馏塔的馏出率、回流比、进料板位置、进料温度等参数,可减少能量消耗13.9%。 相似文献
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甲缩醛反应精馏过程模拟 总被引:4,自引:0,他引:4
通过实验取得了甲醛和甲醇合成甲缩醛的反应参数;建立了其连续生产工艺的数学模型,利用ASPEN PLUS软件对甲醛和甲醇缩合生成甲缩醛进行了模拟,结果表明反应精馏连续生产甲缩醛的工艺是可行的,转化率高达99%,并得到含甲缩醛99%的产物,同时确定了进料板和反应区. 相似文献
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反应精馏过程模拟研究进展 总被引:16,自引:0,他引:16
对均相反应精馏和非均相催化精馏过程的各种模拟计算方法进行了评述,分析了各种算法的优缺点和适用范围,指明了目前研究中存在的不足和今后的发展方向。 相似文献
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应用PRO/II化工模拟软件对LPG精馏过程进行模拟,在模拟分析的基础上,开发了LPG精馏工艺流程,确定了各精馏塔的工艺操作参数,如压力、温度、塔板数、进料板位置、温度灵敏板位置等。 相似文献
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运用化工流程模拟软件Aspen Plus对氯乙烯精馏装置低沸塔和高沸塔的操作变量进行灵敏度分析。结果显示,低沸塔进料位置在第二块板时比之前第八块板可以得到更高纯度的馏出液,低沸塔馏出比由0.25优化到0.3,回流比由0.5优化到0.8。高沸塔最终优化结果为第四块板进料,馏出比从0.93优化到0.95,回流比从0.8优化到0.9。 相似文献
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部分牛顿法模拟反应精馏过程 总被引:3,自引:1,他引:2
提出了用全液相组成牛顿拉夫森法模拟反应精馏的解算方法。实例考核结果表明,该算法较为简单,占内存少,收敛速度快,稳定性好,适用于在微机上进行具有化学反应的强非理想物系的分离过程计算。 相似文献
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部分牛顿法模拟反应精馏过程 总被引:7,自引:2,他引:5
提出了用全液相组成牛顿拉夫森法模拟反应精馏的解算方法。实例考核结果表明,该算法较为简单,占内存少,收敛速度快,稳定性好,适用于具有化学反应的强非理想物系的分离过程计算。 相似文献
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采用非平衡级METSH方程组,对丙烯精馏过程进行了模拟计算和优化,提出了一种全新的、实用的塔板组成的圆整归一方法,摸索出了一套行之有效的计算程式,大大提高了模型方程组迭代计算的收敛性,求解更加稳定。本文还以精馏塔利润为目标,建立了优化目标函数,进行了优化计算,计算结果对丙烯塔生产具有一定意义。 相似文献
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氯乙烯精馏过程的模拟及优化 总被引:1,自引:0,他引:1
利用化工流程模拟软件 Aspen Plus,对电石乙炔法工艺中的氯乙烯精馏过程进行模拟.精馏全流程的模拟结果与实际生产数据基本吻合.对低沸塔和高沸塔的进料位置、回流比等参数进衍了优化.精馏过程的产品纯度提高到99.67%,低沸塔塔顶冷凝器的冷量消耗减少了17.4%,再沸器蒸汽消耗量减少了10.1%. 相似文献
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Orthogonal collocation on finite elements is applied to discretize the DAE system for the simulation of multiple-fraction batch distillation processes. A detailed dynamic tray-by-tray model is used to describe batch columns more accurately which, however, leads to a set of model equations composed of nonlinear DAEs with a fairly high dimension. In addition, batch distillation operation usually takes a long period of time and therefore it costs large computational expense to simulate such processes. The use of orthogonal collocation is demonstrated to obtain a stable and highly accurate algebraic representation of the differential equations so as to improve the computational efficiency significantly. Because of the orthogonality of the polynomials introduced to approximate the state variables within a time interval, large integration steps can be taken with the collocation approximation without reducing the computational accuracy. Through simulation of two real batch distillation processes it is found that with this discretization approach 50% CPU time can be saved in comparison to the implicit Euler method normally used. 相似文献
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应用Aspen Plus流程模拟软件对火炬气回收丙烯进行单塔和双塔两种工艺的流程模拟。模拟结果表明:两种工艺在本系统中均可行,双塔工艺能耗低于单塔工艺,且稳定性较好。此外,在双塔工艺的基础上,对丙烯精馏塔进行了工艺优化及塔的结构的设计。 相似文献
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《分离科学与技术》2012,47(15):3813-3825
Abstract Suppression of osmotic distillation of water is important for the commercial scale application of gas membranes. We have equalized the water vapor pressure on either side of the membrane by increasing the temperature of the stream with the lower water vapor pressure. The experimentally determined temperature gradient is many times larger than predicted from water vapor pressure–temperature data. The larger temperature gradient may be explained by considering the heat flux across the membrane. The economic viability of adjusting the temperature of the feed and strip streams to suppresses water vapor transport depends on the additional energy costs involved. 相似文献
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This paper studies the bootstrap procedures for time series regressions with integrated processes. Both estimation and hypothesis testing are studied. It is shown that the suggested bootstrap approximations to the distribution of the least squares estimator and the regression test statistic are asymptotically valid. A Monte Carlo experiment is conducted to evaluate the finite sample performance of these bootstrap procedures. The simulation results indicate that the bootstrap method provides reasonably good approximation to the distribution of the least squares estimator, and gives proper size and satisfactory power. 相似文献