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摘要：干燥技术的应用在我国具有十分悠久的历史，其中转筒干燥设备由于构造简单、处理量大、适用范围广等优点，被广泛的应用于化工、冶金、轻工、农业等行业。这对于降低成品含水量达到安全储存水分、提高产品利用率和经济效益有着重要意义。本设计对转筒烘干机进行了材料的选择、热量和物料的衡算、筒体结构的设计、并对转筒干燥机设备中的热风系统、通风系统、支承装置内的部件，进行了选型、强度的计算和校核。本转筒烘干机，采用并流式直接加热的方法，由天然气热风炉提供热源，干燥介质为天然气燃烧产物，在满足脱水量200kg/h的条件下，可以适用于干燥食品、谷物、煤矿中各类颗粒状物料。36401
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毕业论文关键词：烘干机；转筒；化工；计算校核
Design of Rotary Drum Dryer
Abstract:There is a very long history, since drying technology been applied in our country.They are widely used in chemical industry, metallurgy, light industry, agriculture and other industries,due to the rotary drum dryer has a simple structure, large capacity,wide application.This means a lot for the safe storage of reduce the moisture content of product, improve efficiency of product and economic benefits.The design of rotary drum dryer based on the choice of materials, the calculation of heat balance and material balance, the design of cylinder structure. The design of rotary of drum dryer also fished the selection, strength calculation and check of the hot air systems, ventilation systems,and components supporting device .The rotary dryer dry material with the flow direct heating method, the gas stove to provide heat,and use the natural gas combustion products drying medium. In the conditions of dehydrated level under 200kg/h, the dryer are available for dried foods, cereals,coal and in all types of granular materials.
Keywords: Dryer;Rotary drum;chemical industry;calculation and check
目录
1绪论 1
1.1干燥趋势与发展技术概况 1
1.2干燥设备的分类 1
1.3转筒烘干机的特性与适用范围 2
2设备参数的确定 3
2.1确定初始参数 3
2.2其他参数的确定 3
3物料衡算和热量衡算 5
3.1产量的计算 5
3.2空气消耗量 5
4设备参数计算和确定 7
4.1干燥转筒的直径D 7
4.2容积传热系数αα 7
4.3转筒长度z 8
4.3.1预热段长度z1 8
4.3.2蒸发段长度z2 9
4.3.3加热段长度z3 9
4.4转筒转速和倾斜率的选择 10
4.4.1转筒转速的选择 10
4.4.2转筒倾角的选择 10
4.5物料停留时间 10
4.6物料填充率 11
5筒体结构设计 12
5.1筒体及其结构组成 12
5.1.1筒体跨距设计 12
5.1.2筒体壁厚设计 13
5.1.3挡轮及齿圈在筒体上的位置 13
5.1.4抄板的设计计算 13
5.2筒体载荷计算 14
5.2.1筒体自重 14
5.2.2物料重量qm 15
5.2.3齿圈质量p1 15
5.3筒体弯矩与应力计算 17
5.3.1支点位置的确定 17
5.3.2由均布载荷引起的最大弯矩 18
5.3.3由集中载荷引起的弯矩 19
5.3.4计算弯曲应力 20
5.4筒体变形计算 20