共查询到19条相似文献,搜索用时 125 毫秒
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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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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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浮阀塔板最新应用研究进展 总被引:1,自引:0,他引:1
浮阀塔是一种应用极为广泛的汽液传质设备,本文介绍了国内研究开发的新型浮阀塔板。这些浮阀塔板是在F1型浮阀塔板的基础上开发而成的,相比于F1型浮阀塔板,具有压降低、雾沫夹带量小、泄漏量小、处理量大等优点。本文以塔板的开发年代和塔板类型为主线,对这些浮阀塔板的结构特点、流体力学、传质性能、优缺点等进行了概括总结,对每个系列浮阀塔板的设计开发理念进行了总结概括,同时介绍了导向浮阀塔板在齐鲁石化公司丁二烯装置中应用的成功实例,很大程度地提高了塔板负荷率和产品质量;并简单介绍了一些常用塔板在工业生产中的应用情况,阐述了这些新型浮阀塔板的发展思路,即浮阀形状以条形为主,并且大部分浮阀塔板都开有导向孔;最后指出了今后塔板技术的研究和发展动向。 相似文献
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塔设备改造选型的分析 总被引:2,自引:0,他引:2
就当前扩产增容中塔设备设计和改造时板式塔和填料塔的选型问题加以分析。在评述目前国内常用的几种塔板和新型填料之后,着重介绍一种新型塔板(导向梯形浮阀塔板)和一种新型填料(波环填料——乾隆帕克)。 相似文献
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Anand N. Vennavelli James R. Whiteley Michael R. Resetarits 《Chemical Engineering Research and Design》2014
Existing literature models for predicting the mass transfer efficiencies of binary hydrocarbon, distillation columns employing moving valve trays are evaluated. Only four models for predicting valve tray efficiencies exist in the open literature. All of these models use data from valve trays. The last theoretical model was published in 1972, 42 years ago. By comparison, sieve tray efficiency models are numerous and recent. Sieve tray models were developed from large databases. There are no valve tray equivalents to the fundamental mechanistic models available for sieve trays. Despite the differences between valve and sieve trays, many of the phenomena on sieve and valve trays are similar. Consequently, sieve tray models can be employed to provide estimates for valve trays. In this work, using public FRI data on round moving valves, the performance of the Chen and Chuang sieve tray mechanistic model is compared to the performance of four valve tray models. It appears that, in the absence of fundamental (and qualified) valve tray models, the sieve tray models present a potential alternative for valve tray efficiency predictions. 相似文献
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A type of tray for gas-liquid contacting is described, in which the free area for gas flow through the tray is variable with and controlled by the gas flowrate. The property through which control of the free area is effected is the surface tension of the liquid phase. The advantages are the same as those of ballast and valve trays; namely, reduced pressure drop at high gas rates resulting in increased column capacity, and reduced free space at lower gas rates resulting in high mass transfer efficiency at low and medium vapor loadings as well. Tooling and production costs for the trays of the present investigation, however, are considerably lower than for ballast or valve trays or any other types which require machining operations in their fabrication, and are as low or lower than for sieve trays. Initial experimental comparisons with conventional trays demonstrated that the trays of the present investigation, although designed primarily for operation at high vapor loadings, were indeed capable of yielding high mass transfer efficiencies in the low-to-medium range of vapor loading 相似文献
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