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振动干燥机结构设计大学论文

摘要 上世纪发展了一种卧式多室流化干燥器。这种设备结构简单,操作 方便,适用于各种难干燥的粉粒状物料和热敏性物料的干燥。如聚乙烯、 农药、人造肉、硫酸铜、食盐等。但卧式多室流化干燥器的热效率比多 层流化床干燥器低,尤其是在采用较高热空气温度时其热效率将显得更 差。随着应用技术的不断发展,流化床干燥器的型式及应用也越来越多, 设备的分类方法也有所不同。多年来,流化床干燥器在工业上有许多应 用。流化床干燥器是近年来发展的一种新型高效干燥器。目前在化工、 轻工、医药、食品等工业中已广泛应用,而且已逐步推广到造粒、煅烧、 冷却等方面。干燥时由于气固两相逆流接触,剧烈搅动。固体颗粒悬浮 于干燥介质之中,具有很大的接触表面积,无论在传热、传质、容积干 燥强度、热效率等方面都很优良。流化床干燥器操作简单,劳动强度低, 劳动条件好,检修方便,运转周期长。由于床层温度平稳,干燥效果亦 好。目前应用最广的卧式振动流化床干燥器,形状和基本结构与普通卧 式流化床干燥器很相似。筛板在圆筒箱体内与箱体中心为轴做左右上下 振动,物料在筛板上在振动的作用下做上抛翻转循环运动和向出口端直 线运动。物料依靠机械振动和穿孔气流双重作用流化。为了易于保存和 贮藏,减少运输费用,易于装卸,获得希望的产品质量等目的,通常需 要对各种物料进行干燥,干燥机由此应运而生。国内大量应用的振动干 燥机,如振动流化床干燥机,振动筛分干燥塔等,多数是以振动输送干 燥为主。而在实际设计和制造中,把振动电机的安装角度设计成可调, 通过调整振动电机安装角和振动电机的偏心块重合度,使此种干燥机处 于最佳状态下工作,因此,振动流化床干燥机结构设计是一项有实际意义 的工作。本设计是根据干燥过程的基本原理,针对其它机型的特点和社 会的需求,在已有成功设计实例的基础上,参考以前设计者的经验和结 论,进行的设计。在设计中,主要以振动流化床干燥机为研究对象,分 析了其它干燥机的不同特点以及存在的问题,由此探讨振动流化床干燥 机结构设计。 关键词: 振动流化床; 振动; 干燥机 Abstract In the late 1960s early 1970s the development of a multi-room horizontal flow of driers. This simple structure of equipment, easy to operate, difficult to apply to a variety of dry powder materials and granulose Reminxing materials dry. But horizontal flow more room than the thermal efficiency of dryers fluid bed dryers multi-storey low, especially in a hot air temperature, the higher thermal efficiency will be even worse. With the continued development of applied technology, fluid bed dryers patterns and applications is also increasing, equipment classification is different. Over the years, fluid bed dryers have many applications in industry, such as single cylinder-shaped fluid bed, multi-storey cylinder-shaped fluid bed dryers, fluid bed dryers horizontal multi-room, a blender fluid bed, inert particles fluid bed, vibration fluid bed. Fluid bed dryers is a new development in recent years, efficient dryers. Currently in the chemical industry, light industry, medicine, food and other industries has been widely applied, but has gradually extended to Zaoli, calcine, cooling and so on. Dry because Qiguliangxiang current contact dramatic mix. Solid particles suspended in the dry medium, the contact surface is significant, both in heat transfer, transmission quality, volume dry strength, thermal efficiency aspects are fine. Fluid bed dryers operate simple, low labor intensity, good working conditions, overhaul facilities functioning cycle long. The bed-temperature stable, dry results also good. Currently the most widely applied horizontal vibration fluid bed dryers, and the basic structure and shape

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