Application of ultrasound in regeneration of silica gel for industrial gas drying processes
Application of ultrasound in regeneration of silica gel for industrial gas drying processes
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DOI：
10.1080/07373937.2021.1929296
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发表时间：
2021-06
影响因子：
3.3
通讯作者：
Hooman Daghooghi-Mobarakeh;M. Miner;Liping Wang;Robert Wang;P. Phelan
中科院分区：
文献类型：
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作者：
Hooman Daghooghi-Mobarakeh;M. Miner;Liping Wang;Robert Wang;P. Phelan
摘要工业燃气轮机在工业总能耗中占有相当大的比例。根据所需的干燥程度，与传统的干燥方法相比，固体干燥剂可能是更合适的干燥方法。在这项研究中，超声波强化再生硅胶作为一种替代传统的加热方法进行了研究。为了分析应用超声波的节能效果，采用了对应于327和409的总比功率水平的20和25（W）的恒定总功率水平的方法，并且对于每瓦特的应用超声波功率，从热功率中扣除相同的量。在超声辅助和非超声（仅加热）再生过程中，测量和比较了水分含量和再生温度。实验结果表明，施加超声波沿着热功率改善了再生过程，并减少了多达26%的再生硅胶所需的能量。分析了多孔介质中质量扩散的各种传输模式，提出了包含超声作用的多孔介质表观扩散系数。关于再生温度，通过应用超声波，在较低温度下实现了高达1011%的再生。
Abstract Industrial gas dehumidification contributes to a considerable portion of the total industrial energy consumption. Depending on the desired level of dryness, solid desiccants can be a more suitable dehumidification method compared to the conventional dehumidification processes. In this study, the ultrasound-enhanced regeneration of silica gel as a substitute to conventional heating methods is investigated. To analyze the energy-savings effect of applying ultrasound a method of constant total power levels of 20 and 25 (W) corresponding to total specific power levels of 327 and 409 was adopted and for each Watt of applied ultrasonic power, the same amount was deducted from thermal power. The moisture content and regeneration temperature were measured and compared in ultrasound-assisted and non-ultrasound (heat-only) regeneration processes. Experimental results showed that applying ultrasound along with thermal power improves the regeneration process and reduces the energy required to regenerate silica gel by as much as 26%. Various transport modes contributing to mass diffusion in porous media are analyzed and an apparent diffusion coefficient for porous media that includes ultrasonication effects is proposed. Regarding regeneration temperature, with application of ultrasound, regeneration at lower temperatures by as much as ∼11% was achieved.