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简述波纹填料的发展历程,强调复网借助毛细力提高分离效率的重要意义,提出“液体多向扩散”的理论观点,介绍金属复合板网波纹填料的研究进展。 相似文献
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新型板网填料传质性能的研究 总被引:1,自引:0,他引:1
在500m m 冷模实验塔内对250 Y 型填料进行氧解吸试验,结果表明三层板网复合填料的分离效率明显高于单层板网填料,尤其在液气比低的工况下,效率可以倍增,和广泛应用的金属 Mellapac填料相比,板网复合填料的分离效率能高30% 左右。 相似文献
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四种不同比表面积双曲型高效填料的流体力学与传质性能 总被引:1,自引:1,他引:0
用4种不同比表面积双曲(SQ)型金属波纹填料进行冷模实验。通过研究SQ型填料的流体力学和传质性能可知,双曲填料特殊的弧形波纹结构降低了塔压降,改善了气液分布。研究表明,SQ填料的塔压降要明显的低于BHS型填料,当L=20.38m3/(m2·h)时,SQ800压降比BHS800降低81.5%。SQ1500在常压操作下每米理论级数最高可达到30,比SQ800的传质效率高,能耗高,但是操作范围小;板波纹SQ125填料操作范围最大但是分离效率低,适合原料粗分离;板波纹SQ250填料有较好的分离效率和较宽的操作范围,适合旧塔改造等。 相似文献
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探讨了超重力技术除尘机理,提出了利用新型强化传递过程技术--超重力旋转填料床为实验设备,采用超重力法对电厂烟气进行除尘试验研究,试验了超重力强度、液气比和填料类型等对去除尘效率的影响.实验结果表明,钢质波纹丝网填料优于尼龙丝网填料;液气比和转速较高时分级效率较高;在适宜的操作条件下,超重力法除尘可达到99%以上;压力损失小,压降小于2.4 kPa.超重力技术具有去除效率高和投资费用低等优点,在烟气除尘方面具有良好的应用前景. 相似文献
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为了研究流体在同规格板波纹填料和金属丝网填料的两种不同装填方式,即平装和立装。并在全回流操作条件下,流体力学性能和传质性能的改变情况。我们以乙醇-水为物系,在直径Ф800 mm工业规模精馏塔内进行热模实验。实验结果表明:同等条件下,每米立装板波纹填料的压降比每米平装板波纹填料的压降平均降低36.52%,等板高度平均增加18.15%,分离功平均降低15.33%;而每米立装金属丝网填料的压降与每米平装金属丝网填料的压降相比,压降没有显著变化,而等板高度平均增加10.99%,分离功平均降低9.87%。 相似文献
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在装填有SW型网孔波纹填料的精馏塔内,对间二甲苯的硝化产物进行了精馏分离实验。实验中研究了塔内蒸汽负荷和回流比对收率和压降的影响。实验结果表明,当回流比R=9时,2,6-二甲基硝基苯的收率约60%,每米填料层压降只有5mmHg,能够满足精馏分离混合二甲基硝基苯的要求。 相似文献
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在装填有SW型网孔波纹填料的精馏塔内,对间二甲苯的硝化产物进行了精馏分离实验。实验中研究了塔内蒸汽负荷和回流比对收率和压降的影响。实验结果表明,当回流比R=9时,2,6-二甲基硝基苯的收率约60%,每米填料层压降只有5mmHg,能够满足精馏分离混合二甲基硝基苯的要求。 相似文献
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M. Haghshenas Fard M. Zivdar R. Rahimi M. Nasr Esfahani A. Afacan K. Nandakumar K. T. Chuang 《化学工程与技术》2007,30(7):854-861
The pressure drop and mass transfer efficiency for two‐phase flow in a structured packed column were simulated using a commercial CFD package, CFX version 10. The distillation of the methanol/isopropanol system was carried out in a 0.073 m diameter column, with an element composed of a ceramic structured packing and 0.053 m in height. The Height Equivalent to Theoretical Plate (HETP) value varied from 0.106–0.146 m. Pressure drop experiments were measured with an air/water system. The pressure drops at the flooding and loading points were ca. 173 and 580 Pa/m of packing, respectively. HETPs and pressure drops calculated from the Computational Fluid Dynamics (CFD) model were compared to their experimental counterparts. The average relative error between CFD predictions and the experimental data for the prediction of dry pressure drop, irrigated pressure drop and mass transfer efficiency are 20.3 %, 23 % and 9.15 %, respectively. In all cases, the CFD predictions show a good agreement with the experimental data, indicating that CFD is a reliable, cost saving and suitable technique for the design and optimization of separation processes. 相似文献
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This paper studies the mass transfer performance of structured packings in the absorption of CO2 from air with aqueous NaOH solution. The Eight structured packings tested are sheet metal ones with corrugations of different geometry parameters. Effective mass transfer area and overall gas phase mass transfer coefficient have been measured in an absorption column of 200 mm diameter under the conditions of gas F-factor in 0.38–1.52 Pa0.5 and aqueous NaOH solution concentration of 0.10–0.15 kmol·m?3. The effects of gas/liquid phase flow rates and packing geometry parameters are also investigated. The results show that the effective mass transfer area changes not only with packing geometry parameters and liquid load, but also with gas F-factor. A new effective mass transfer area correlation on the gas F-factor and the liquid load was proposed, which is found to fit experiment data very well. 相似文献
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采用氧解吸实验,在直径190 mm的有机玻璃塔内,液相喷淋密度10~38 m3·m-2·h-1,F因子0.2~3.2 m·s-1·(kg·m-3)0.5的实验条件下测定了一种新型垂直板规整填料的流体力学及传质性能。实验结果表明:垂直板填料的操作压降及传质性能均显著优于商业波纹填料。通过与几种经改进的250型波纹填料相比发现,两者泛点F因子整体上相当;在较高液体喷淋密度下,垂直板填料传质性能及压降均高于改进250型波纹填料;在低喷淋密度下,垂直板填料可实现压降低于改进250型波纹填料,而两者传质性能相当。此外,对填料结构改进对其性能的影响进行了单因素考察。 相似文献
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The wetted-wire packing, mainly consisting of a bundle of vertical parallel wires, is a promising concept for the use in separation columns. To investigate the multiphase flow inside the packing in detail and to estimate the performance of the packing, experiments on liquid films on a single vertical wire in a counter current gas flow were carried out. To get information about the interfacial area, an optical measurement of the film thickness was carried out with a digital high speed camera and image recognition tools. By measuring the evaporation of water and aqueous polyvinylpyrrolidone solutions into air, the gas-side mass transfer was determined. The liquid-side mass transfer was examined by measuring the desorption of CO2 from water into air. The results show that the mass transfer coefficients are comparable to those appearing in common structured packings. When assuming a sufficiently high wire packing density, a specific interfacial area similar to corrugated sheet structured packings can be reached. Previous studies predicted a low pressure drop per packing height and extended capacity limits compared to common packings. In consideration of these results, the wetted wire packing therefore is shown to be suitable especially for absorption processes where a low pressure drop is favourable. 相似文献
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根据液相在波纹规整填料片上呈现渗流、膜状流等不同的流动方式,选择5种不同的波纹规整填料对其流体力学和传质性能进行研究,以探究液相在波纹片上的流动方式对波纹规整填料性能的影响.研究结果表明,液相呈渗流流动的泡沫碳化硅波纹规整填料(SCFP型)有利于液体横向扩散和液膜均匀分布,当液相喷淋密度和气相F因子均较小时,其压降最低,传质效率最高;液相主要呈渗流流动、兼有膜状流动的双层错孔丝网填料(DMⅢ型)有利于波纹片两侧液体交换,强化液体在流动过程中的扰动,其压降及传质性能略逊于SCFP型填料;液相主要呈膜状流动的BX型、DMⅠ型及DMⅡ型填料波纹片表面液膜较厚,横向扩散能力差,其传质效率低于SCFP型和DMⅢ型填料.研究揭示了依靠渗流作用的波纹规整填料具有较好的应用性能,为波纹规整填料的进一步发展开拓了新思路. 相似文献
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喷射式并流填料塔板流体力学和传质性能 总被引:9,自引:1,他引:8
提出一种新型高效塔板——喷射式并流填料塔板(JCPT),介绍1200mm冷模塔流体力学实验结果和200mm热模塔传质效率,给出了适用于工业设计性能参数的计算关联式。通过与新垂直筛板(NVST)的比较表明,JCPT具有雾沫夹带小、处理能力大、塔板效率高等特点,是一种具有广泛应用前景的新型高效塔板。 相似文献
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