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汤合君 《硫磷设计与粉体工程》1994,(2)
人们对节能技术日益重视,要求精馏、吸收、解吸等单元操作的塔设备在接近最小回流比下操作,板式塔和颗粒型散堆填料往往不能满足要求,规整填料受到了普遍重视。 规整填料由许多相同几何形状的填料单元组成,以整砌方式装入塔内,使塔截面上形 相似文献
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填料塔作为一种传统的气、液传质设备,近年来有很大发展。由于填料结构的不断改进,在很多生产过程中已代替了传统的板式塔。填料主要有两大类:散堆填料和规整填料。散堆填料有拉西环、鲍尔环、阶梯环、矩鞍环、海尔环、泰勒花环等。散堆填料主要优点在于安装方便,具有通用性。但是通量较小,流体分布性能较差,阻力较大,如果有沉淀物生成,易造成填料塔堵塞等缺点。随着化学工业的发展,对塔设备不断提出新要求:有的要求分离热敏性物系,有的要求通过技术改造提高生产能力和产品质量,有的要求降低回流比,减少系统阻力以求节能有的因环保要求,在三废处理时必须进一步提高效率以达到国家有关标准等等。随着塔器的大型化,散堆填料难以满足这种要求。因而结构与排列整齐、有效传质面积大、阻力小的规整填料应运而生,很到广泛应用。 相似文献
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填料塔开发应用新进展 总被引:2,自引:0,他引:2
综述了国内外填料塔的发展现状,包括近几年开发成功的新型散堆填料,规整填料及填料塔塔内件结构特点,同时介绍新型规整填料、塔内件的一些工业应用成功实例,展望了填料塔今后发展方向。 相似文献
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填料塔将逐步取代板式塔。本文对塔填料应用在几种产品的分离上进行了叙述。并介绍了国外各种散堆填料和规整填料的品种和规格。 相似文献
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《气体净化》2004,4(4):93-97
1 概述。填料塔作为一种传统的气、液传质设备,近年来有很大发展。由于填料结构的不断改进,在很多生产过程中已代替了传统的板式塔。填料主要有两大类:散堆填料和规整填料。散堆填料有拉西环、鲍尔环、阶梯环、矩鞍环、海尔环、泰勒花环等。散堆填料主要优点在于安装方便,具有通用性。但是通量较小,流体分布性能较差,阻力较大,如果有沉淀物生成,易造成填料塔堵塞等缺点。随着化学工业的发展,对塔设备不断提出新要求:有的要求分离热敏性物系,有的要求通过技术改造提高生产能力和产品质量,有的要求降低回流比,减少系统阻力以求节能;有的因环保要求,在三废处理时必须进一步提高效率以达到国家有关标准等等。随着塔器的大型化,散堆填料难以满足这种要求。因而结构与排列整齐、有效传质面积大、阻力小的规整填料应运而生,很到广泛应用。 相似文献
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填料塔作为一种传统的气、液传质设备,近年来有很:赶发展。由于填料结构的不断改进,在很多生产过程中填料塔已代替了传统的板式塔。填料主要有散堆填料和规整填料2类。散堆填料有拉西环、鲍尔环、阶梯环、矩鞍环、海尔环、泰勒花环等,其主要优点在于安装方便,具有通用性;但是通量较小,流体分布性能较差,阻力较大,如果有沉淀物生成,易造成填料塔堵塞等缺点。随着化学工业的发展,对塔没备不断提出新要求:有的要求分离热敏性物系,有的要求通过技术改造提高生产能力和产品质量,有的要求降低回流比,减少系统阻力以求节能; 相似文献
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针对催化分馏塔的工艺特点,在不改变塔体的基础上,提出了ADV高效塔盘和SP规整填料的综合成组技术,并应用该技术时塔内件进行改造,实现了催化主分馏塔的扩能及综合性能的完善。与改造前相比,改造后的催化主分馏塔处理能力增大,操作弹性提高,压降减小,分离效率提高,能耗降低;消除了操作过程中的瓶颈,保证了汽油降烯烃的要求。 相似文献
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基于欧拉-欧拉模型,采用CFX软件对筛板式填料的气液两相并流流动进行了模拟。将模拟所得的压降与填料的出厂特性值进行了对比,发现在液气动能参数较小的情况下,两者吻合较好。分析了该流场内的速度分布和压力分布的特点,射流卷吸作用使流场内两相流体混合,但涡旋使筛板下方压强减小,射流撞击使筛板上方压强增加。对不同结构的矩形筛板式填料的压降进行研究,结果表明:筛板孔径和液相流量是影响筛板压降的重要因素,开孔直径越小,液相流量对单板压降的影响越大;上层筛孔投影与下层筛孔相交的结构更能有效降低单板压降。液相流量较大时,两个不同板间距的单板压降曲线将相交于一点,气相流量低于此交点时,板间距越小,单板压降越大;气相流量高于此交点时,则相反。 相似文献
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网填筛板流体力学性能研究 总被引:2,自引:0,他引:2
在直径为600mm有机玻璃塔内,以水-空气系统对放置网孔填料层的筛板(称网填筛板)和普通筛板进行了流体力学性能对比实验。研究发现,在普通筛板上加一层厚度为15mm的网孔填料,可以使雾沫夹带明显减少,负荷上限提高50%~80%。同时,塔板压降和漏液有所增加。 相似文献
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Column setup has been widely utilized in the petroleum and chemistry industries. However, with the fast progress of industries and the increasingly serious energy shortage, designing a new column setup with better performance and higher capacity becomes more urgent. In order to improve column's capacity and expand operating condition, a new type of column tray named novel vertical spray packing (NVSP) tray was designed and experimented. The performances of the novel tray, including pressure drop, weeping, entrainment and tray efficiency, were tested in a plexiglass column. In addition, performances of the novel tray were compared with that of the sieve tray and the Glitsch V1 valve tray. Based on the experiment data, the mathematical correlations of pressure drop, weeping and entrainment for the novel tray were established by regression analysis method. A fundamental model of dry pressure drop of the novel tray was promoted at the form of sum mode. The results indicate that the novel tray has wider operating condition and better performance. 相似文献
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The hydraulic and mass transfer performance of a combined knitted mesh packing and sieve tray has been measured for the distillation of methanol-water mixtures. It was found that by adding a shallow bed of packing, the Murphree tray efficiency increased by 40–50% over a wide range of concentrations and flow rates. This increase in tray efficiency can be attributed to a much smaller and more uniform bubble formation on the packed tray. Hydraulic measurements have shown that the packed trays have lower weeping and entrainment, as well as slightly higher froth heights and pressure drops. 相似文献
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Shuo Yang Jilong Zhang Jiaxing Xue Qingpeng Wu Qunsheng Li Hongkang Zhao Liqun Zhang 《中国化学工程学报》2021,39(11):59-67
Distillation is the most common separation technology utilized in the petroleum and chemistry industries. Due to the wide usage of the distillation column, even a small improvement in performance may result in significant energy cost savings. Aiming to improve the hydrodynamics and mass transfer performance, the flow-guided trapezoid spray-packing tray (FTS-PT) was designed by combining flow-guided holes and trapezoidal caps with structured packing. And the experimental measurements of the FTS-PT, including pressure drop, clear liquid height, weeping, entrainment, and tray efficiency, were conducted in a 500 mm diameter plexiglass column with the air-water-oxygen system. Moreover, the performance of the FTS-PT was compared with that of new vertical sieve tray (New VST) and F1 valve tray. The results show that FTS-PT has a significant advantage in pressure drop, entrainment, and capacity. Furthermore, the calculation model of the pressure drop was derived and used for the FTS-PT with a relative deviation of less than 5%. 相似文献
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《分离科学与技术》2012,47(13-14):2255-2272
Abstract The Murphree efficiency of the fifth tray in a six-sieve tray distillation column, 7.8 cm in diameter and 85 cm high, was increased from 37.5 to 90% when three disks of a wire mesh pad, 9 cm high, were placed on the tray. An acetone-methanol test system was used in this investigation. The pressure drop across the tower corresponding to this packing increased by 33%. Nine disks of Raschig rings of similar height increased the tray efficiency to 75% and the pressure drop by 16%. A model was used for the azeotropic system, and the overall tower efficiency was found to increase by about 20% due to the presence of packing on a single tray. 相似文献