共查询到19条相似文献,搜索用时 62 毫秒
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1概述
安阳化学工业集团公司甲胺生产装置始建于2002年,其甲胺精馏为典型的四塔连续精馏工艺,精馏塔均为填料塔,填料采用金属丝网波纹规整填料,装置设计生产能力为20kt/a。自2003年投运以来,随着系统生产能力的提高,装置精馏部分特别是萃取塔逐渐暴露出一些问题,该塔分离出的三甲胺产品质量不合格,产品中二甲胺含量超标。为了彻底解决这一问题,公司决定采用综合性能优异的板式塔取代填料塔,并且选用了浮阀塔盘。针对萃取塔的实际运行情况,同时考虑到甲胺生产装置30kt/a的改扩建要求,决定制作1台新萃取塔,新萃取塔的直径为Φ1500mm(旧塔直径为Φ1400mm),塔高38.5m。改造后的甲胺装置达到了设计生产能力,三甲胺产品质量达到了质量标准,优等品率100%,蒸汽消耗显著降低,取得了良好的经济效益。 相似文献
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1 存在问题 我厂粗苯精制系统于1971 年投产,采用传统的酸洗蒸馏工艺,设计处理量 2.5万t/a,6台蒸馏塔塔板均为传统的泡罩塔板或浮阀塔板,其中初馏塔为泡罩塔板,其他各塔为浮阀塔板,由于技术改造投入不足,粗苯精制系统逐渐暴露出以下问题. 相似文献
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介绍了组合导向浮阀塔板的结构特点,并对脱碳五塔改造(将塔中F1浮阀塔板更换为组合导向浮阀塔板)前后标定装置的操作数据和收率进行比较. 相似文献
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在不改变塔径、板间距、降液管面积前提下,应用组合导向浮阀塔盘技术对氨吸收制冷装置高低压精馏塔进行改造。改造后设备处理能力提高40%以上。 相似文献
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组合导向浮阀在氯化苯初、精馏中的应用 总被引:1,自引:0,他引:1
主要介绍了组合导向浮阀在氯化苯装置初、精馏塔设计中的模拟计算和优化。组合导向浮阀很好的解决了塔器放大中的滞止区增加、返混加剧、液面梯度变大等不利因素,同时还提高了塔板效率,使产品的纯度得到了进一步的改善。 相似文献
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对原有Φ14 0 0甲醇回收泡罩塔进行改造 ,利用计算机进行塔的模拟与优化 ,采用新型高效组合导向浮阀塔替代了原有塔型 ,取得了理想的效果 相似文献
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曾爱武 《中国化学工程学报》2002,10(5):508-516
Experiments demonstrated that the weeping is mal-distributed and occurs mainly in a region of tray deck next to the inlet weir. The amount of weeping in this region depends on the weeping rate. On this basis, three types of weeping distribution are proposed. The effect of real-distributed weeping on the Murphree tray efficiency is evaluated by using the three-dimensional non-equilibrium mixing pool model, where the influences of the flow pattern and the variation of Murphree point efficiency on a tray are taken into account. The calculated results reveal that the extent of Murphree tray efficiency drop depends chiefly on the degree of mal-distribution and the percentage of weeping. It is also demonstrated that in the determination of the lowest operating limit of vapor velocity, the unfavorable effect of real-distributed weeping should be considered as an important factor and cannot be ignored. 相似文献
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The Mai-distribution of Weeping from a Distillation Tray and Its Effect on Tray Efficiency 下载免费PDF全文
曾爱武 《中国化学工程学报》2002,(5)
Experiments demonstrated that the weeping is mal-distributed and occurs mainly in a region of tray deck next to the inlet weir. The amount of weeping in this region depends on the weeping rate. On this basis, three types of weeping distribution are proposed. The effect of mal-distributed weeping on the Murphree tray efficiency is evaluated by using the three-dimensional non-equilibrium mixing pool model, where the influences of the flow pattern and the variation of Murphree point efficiency on a tray are taken into account. The calculated results reveal that the extent of Murphree tray efficiency drop depends chiefly on the degree of mal-distribution and the percentage of weeping. It is also demonstrated that in the determination of the lowest operating limit of vapor velocity, the unfavorable effect of mal-distributed weeping should be considered as an important factor and cannot be ignored. 相似文献
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为了深入了解组合导向浮阀塔板的流体力学性能,在阀片全开状态下,利用计算流体力学(CFD)方法对700 mm中试规模的组合导向浮阀塔塔板上的气液两相三维流场进行模拟研究,采用欧拉-欧拉非稳态模型(Eulerian),考虑气液两相间的动量传递现象,将清液层高度作为衡量非稳态流场收敛的判别标准。通过关联实验数据,得出适合组合导向浮阀塔板的清液层高度关系式,并与模拟结果进行对比。模拟结果表明,组合导向浮阀塔板的液面梯度和弓形区域回流面积小,具有良好的流体力学性能。 相似文献
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