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筛孔型润德塔盘的流体力学性能 总被引:1,自引:0,他引:1
以空气和水为介质,对筛孔型润德塔盘的流体力学性能进行实验研究,通过冷模实验考察其固阀开孔率、F因子、喷淋密度对干板压降、总板压降、清液层高度、平均泡沫层高度、操作弹性的影响,并与传统筛孔穿流塔盘进行比较. 结果表明,在操作范围内,筛孔型润德塔盘的操作弹性比传统穿流筛孔塔盘平均提升34.15%,固阀开孔率为33.3%的筛孔型润德塔盘总板压降比传统筛孔穿流塔盘平均低72.38%,比固阀开孔率为50.0%和66.7%的塔盘的干板压降平均低88.8%和206.3%,最佳固阀开孔率为33.3%. 得到筛孔型润德塔盘干板压降关联式为pd=49.98F1.785. 相似文献
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分离过程是化工生产工艺中的重要组成部分,塔设备是主要的化工分离设备。随着化工生产的发展,高效率、大通量、低能耗分离技术越来越受到人们的重视,高效导向筛板就是适应这种趋势而开发出来的新型塔板。 相似文献
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以FCC催化剂颗粒研究垂直筛板流化床内构件对气固两相流化性能的影响,考察了板孔气速、颗粒循环量和帽罩开孔比等筛板结构对流化床压降和提升量强度的影响. 结果表明,气固两相总体逆流流动条件下,帽罩内气速达4 m/s,气固高速并流喷射无气泡,两相接触好、返混小,属快速流态化. 由于没有气泡,床层压力波动小,在塔板上颗粒返混小. 垂直筛板压降随板孔气速、帽罩底隙高度增大而增大,随帽罩开孔比、板孔径增大而减小,颗粒提升量大,床层压降大. 提升量强度随板孔气速、帽罩底隙高度、颗粒循环量增加而增大,随帽罩高度与塔节高度比增大而减少,随帽罩筛孔孔径变化存在最大值. 当帽罩开孔比为1.2~2.5、板孔面积与帽罩截面积比为0.42、帽罩底隙高与板孔孔径比为0.36~0.64时帽罩流化性能较好. 相似文献
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The droplet size distribution with large-holed compound sieve tray operating in the spray regime is measured by using a double electrical probes technique in a cold model column of 400 mm diameter. The results indicate that the hole F-factor Fo and surface tension are the main factors which influence the liquid dispersion expressed by the Sauter mean diameter D32. A correlation of D32 on surface tension, viscosity, F-factor, weir height and liquid flow rate is proposed. 相似文献
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《分离科学与技术》2012,47(4):925-943
Abstract Annular centrifugal contactors suitable for laboratory use in solvent extraction work have been designed and tested for both hydraulic performance and mass-transfer efficiency. The 2-cm contactors have nominal flow rates of 80 mL/min and mass-transfer efficiencies of at least 85% as measured by the extraction of uranium. These contactors work well for organic-to-aqueous (O/A) flow ratios greater than 0.8. Multistage units allow proposed flow sheets to be tested on a continuous basis in the laboratory. Scale-up to larger plant-size units is straightforward. 相似文献
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填料塔在高压蒸馏中的应用 总被引:2,自引:0,他引:2
高压蒸馏与真空和常压操作相比,填料塔中的气液均匀分布变得更加困难,并导致气相返混增加,填料分离效率下降,但经过适当的设计,填料塔不但可以提高高压蒸馏的生产能力,而且效率也得到提高。文中介绍高压蒸馏填料塔的特点和近年来的研究进展,并总结了国内外高压蒸馏填料塔新塔设计和老塔改造的成功经验。 相似文献
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《分离科学与技术》2012,47(1-4):193-210
Abstract A 2-cm contactor (minicontactor) was developed and used at Argonne National Laboratory for laboratory-scale testing of solvent extraction flowsheets. This new contactor requires only 1 L of simulated waste feed, which is significantly less than the 10 L required for the 4-cm unit that had previously been used. In addition, the volume requirements for the other aqueous and organic feeds are reduced correspondingly. This paper (1) discusses the design of the minicontactor, (2) describes results from having applied the minicontactor to testing various solvent extraction flowsheets, and (3) compares the minicontactor with the 4-cm contactor as a device for testing solvent extraction flowsheets on a laboratory scale. 相似文献
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高效导向筛板在醋酸甲酯精馏塔技术改造中的研究与应用 总被引:3,自引:0,他引:3
在计算机上模拟优化设计了醋酸甲酯的精馏方案。采用新型高效导向筛板塔解决了含发泡物质物系的精馏难点。技术改造后扩产约50%、节能40%左右并提高了产品质量和回收率。技术改造投资30万元、年增经济效益400万元,投资回收期不到1个月。 相似文献
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