热力干燥技术:新发展和未来研发潜力
A.S.Mujumdar[1] 吴中华[1] 朱亮[2] 徐庆(译)[2] 李占勇(校)[2]
[1]新加坡国立大学,新加坡117576 [2]天津科技大学机械工程学院,天津300222
摘 要:
热力脱水是一个能源高度密集型的过程,几乎应用于所有工业部门。在发达国家,热力脱水的能耗占到国家所有工业能耗的10%~20%。随着能源成本的逐步升高和对减轻由石化燃料燃烧排放产生的环境污染的需求,开发新型干燥技术变得愈加重要。此外,由于在传质传热过程中会产生物理和(或)化学变化,干燥还会影响到干燥产品的质量。成千上万的干燥产品、数百种不同类型的干燥器使得开发适用范围较广的干燥器的设计及放大相当困难。过去的30年来,对各种形式的湿固态物料、糊浆和液体的干燥,已经有人做了大量的关于传递现象和材料科学方面的基础和应用研究。将简述目前干燥技术发展水平及其理论认识,并提供一些正在开发的新技术实例,指出一些为提高干燥技术而挑战基础和模拟研究的机会。还将给出实例说明如何对喷雾、脉冲燃烧干燥装置进行数学建模,以此进行创新型概念的设计。[著者文摘]

文章出处:
《干燥技术与设备》-2007年5卷6期 -269-274页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
1727-3080(2007)06-0269-06
相关文章:
Thermal Drying Technologies: New Developments and Future R&D Potential
A. S Mujumdar, WU Zhong-hua (Minerals, Metals and Materials Technology Centre & Engineering Science Program, National University of Singapore, 9 engineering drive 1, Singapore 117575)
Abstract:
Thermal dehydration processes are highly energy-intensive and are found in almost all industrial sectors, accounting for 10 to 20 per cent on national industrial energy consumption in developed countries. With escalating energy costs and need to mitigate environmental pollution due to emissions due to combustion of fossil fuels, it is increasingly important to develop innovative drying technologies. Furthermore, drying is also affects quality of the dried product due to physical and/or chemical transformations that may occur during the heat and mass transfer operation. With tens of thousands of products that are dried in hundreds of dryer types, it is a formidable task indeed to develop design and scale-up procedures of wide applicability. Attempts have been made over the past three decades to make fundamental and applied contributions to transport phenomena and material science aspects in drying of various forms of wet solids, pastes and liquids. This paper will attempt to summarize the state-of-the-art as far as theoretical understanding of drying processes and provide examples of some new thechnologies being developed. Opportunities for challenging fundamental and modeling studies to enhance drying technologies will be identified. Illustrative results will be presented to show how mathematical modeling of spray and pulse combustion dryers can be utilized to develop new innovative conceptual designs.[著者文摘]
Key words:
Thermal drying; Mathematical modeling; Innovative conceptual design; Spray drying; Pulse combustion

学术















cqvip.com