共查询到19条相似文献,搜索用时 109 毫秒
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《化学工程》2016,(4):26-30
设计了导向孔-导向浮阀复合塔板和筛孔-导向浮阀复合塔板,在板间距为600 mm,液流强度为20 m~3/(m·h),1 500 mm×450 mm的矩形塔内,以空气-水系统测试了3种塔板的干板压降,湿板压降,雾沫夹带率,漏液率,清液层高度,泡沫层高度水力学性能。由实验数据分别拟合了3种塔板干板压降,湿板压降,雾沫夹带率,漏液率的关联公式。实验表明:筛孔-导向浮阀复合塔板在压降和漏液率方面优于导向浮阀塔板;导向孔-导向浮阀复合塔板在水力学方面都优于导向浮阀塔板,是一种操作弹性大,具有更好水力学性能的优良塔板;选择合适的塔内件复合也是改善塔板性能的关键。 相似文献
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提高复合塔板操作弹性和通量研究 总被引:2,自引:0,他引:2
在内径为 5 0 0mm和 30 0mm的塔内 ,以空气 水为物系 ,测定了不同结构 (浮阀 筛孔穿流板、非均匀开孔率穿流板、双孔径穿流板 )的穿流板与 2 5 0Y规整填料组成的各种复合塔板的流体力学性能。试验结果表明 :浮阀 筛孔复合塔板操作弹性小、气液处理量小 ;非均匀板复合塔板与均匀板复合塔板相比 ,操作弹性大2 0 %— 6 0 % ,气处理量大 2 0 %— 80 % ,液处理量大 70 %左右 ;双孔径复合塔板比单孔径复合塔板处理量略微增大 ,操作弹性高达 3.5以上。 相似文献
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设计了一种新型导向筛板-浮片式浮阀复合塔板。在直径为1. 2 m的圆形有机玻璃塔中进行冷模实验,测定了实验塔板在不同条件下的性能参数。实验表明,当液流强度一定、阀孔动能因子升高时,塔板压降、雾沫夹带量和传质效率增大,而漏液量会减小;当阀孔动能因子一定、液流强度升高时,塔板压降、雾沫夹带量和漏液量均会增大,但传质效率会减小。此外,对F1浮阀塔板和ADV浮阀塔板在相同实验条件下进行冷模实验,结果表明,新型导向筛板-浮片式浮阀复合塔板的流体力学性能更好。 相似文献
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FSV浮动筛片塔板的开发研究 总被引:1,自引:1,他引:1
由洛阳石化工程公司研制开发的FSV浮动筛片塔板结合了浮阀与筛孔塔板的优点。通过与Fl浮阀和大筛孔塔板的冷模流体力学和传质实验对比,证实FSV塔板比上述两种塔板具有大负荷比、高效率和低压降的特点。 相似文献
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采用直径1 m、板间距0.6 m的中试规模冷模塔,以空气和水为物系,对矩形导向浮阀和波纹导向浮阀组合塔板的压降进行了研究。在开孔率为15.25%的条件下,分别考察了10,25,40 m~3/(m·h)液流强度和30,50,70 mm堰高下3种组合方式的塔板压降。实验结果表明:在相同的组合方式下,堰高和液流强度的增加均会导致塔板压降的增加;在堰高和液流强度一定的条件下,弓形区域布置波纹导向浮阀,中间矩形区域布置矩形导向浮阀的组合塔板压降最低。同时文中还对3种组合方式塔板的压降进行了数学方程式拟合,其结果对塔设备设计具有参考价值。 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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新型固定阀塔板的流体力学和传质性能研究 总被引:4,自引:1,他引:4
提供了一种阀盖两侧具有向下弯曲折边的新型固定阀。在内径为500mm的有机玻璃塔内,以空气水为物系,研究了其流体力学性能;在内径为300mm的不锈钢塔内,以乙醇水为物系,常压全回流情况下,研究了其传质性能。研究结果表明:新型固定阀塔板的板压降略高于筛孔塔板,比F1 浮阀塔板小得多,雾沫夹带量小,雾沫夹带液泛点阀(筛)孔动能因子均比筛孔塔板、F1 浮阀塔板大,漏液量较小,漏液点阀(筛)孔动能因子比筛孔塔板低,比F1 浮阀塔板高,传质效率与F1 浮阀塔板相当。 相似文献
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JF导向条阀塔板在常减压装置中的应用 总被引:2,自引:0,他引:2
通过JF导向条阀塔板与F1型浮阀塔板的对比分析,表明JF导向条阀塔板在塔板漏液,雾沫夹带,处理能力等方面较F1型浮阀塔板有较大优势,是一种新型高效塔板。 相似文献
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The novel SiC foam valve tray was made of thin slices of SiC foam material with a high specific surface area. Hydrodynamic performances of the novel SiC foam valve tray were studied with air-water system at atmospheric pressure. These performance parameters included pressure drop, entrainment, weeping and clear liquid height. The mass transfer efficiency of the SiC foam valve tray was measured in laboratory plate column. Compared with the F1 float valve tray, the dry pressure drop was decreased about 25%, the entrainment rate was about 70% lower at high gas load, the weeping was much better, and the mass transfer efficiency was far higher. Thus, the overall performance of the novel SiC foam valve tray was better than that of F1 float valve tray. 相似文献
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对组合导向浮阀塔板进行了水力学实验,测定了2块直径1m、不同浮阀排布的组合导向浮阀塔板的雾沫夹带和相关水力学数据。根据实验塔板的结构和尺寸参数建立几何模型,采用Fluent 6.3.26软件对板上气液两相流动进行CFD模拟,考察了塔板上的气液两相流动状况。清液层高度和雾沫夹带的模拟结果与实验结果吻合较好,验证了模拟的准确性。对两块不同浮阀排布的组合导向浮阀塔板的雾沫夹带和板上液体反向流进行了分析,结果表明在适当位置用导向能力更强的梯形浮阀代替矩形浮阀可有效降低雾沫夹带率和液体反向流比例,雾沫夹带率的实验值和模拟值分别降低了13.4%和10.6%,液体反向流比例降低了12.8%。研究结果表明,通过CFD模拟可望指导两种浮阀的合理排布和塔板的优化设计。 相似文献
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Taleb Zarei Rahbar Rahimi Mortaza Zivdar 《Korean Journal of Chemical Engineering》2009,26(5):1213-1219
The flow pattern and hydraulics of a Mini V-Grid valve (MVG) tray is predicted by using computational fluid dynamics simulation.
A 3-D CFD model in the Eulerian framework was used. The simulation results for MVG tray are compared with that of sieve tray.
The sieve tray geometry and operating conditions are based on the Solari and Bell’s sieve tray [1]. The MVG tray differs from
that of Solari and Bell’s sieve tray solely by the difference in design of available openings for the flow of gas. The simulation
results show that the clear liquid height and the pressure drop of MVG tray are lower than that of sieve tray whereas the
liquid velocity is higher and contacts of phases are good. The simulation results of sieve tray are in agreement with the
experimental data of Solari and Bell [1]. 相似文献