脱硫石膏蒸汽回转干燥工艺参数的实验研究

发布时间：2018-04-09 02:04

本文选题：蒸汽回转干燥机　切入点：脱硫石膏　出处：《哈尔滨工业大学》2015年硕士论文

【摘要】：在脱硫石膏资源化处置工艺中,蒸汽回转干燥工艺以其优越性获得石膏行业的认可。由于蒸汽回转干燥机传热非常复杂,目前国内外尚无设计准则,相关的研究成果比较匮乏。通过理论分析和实验研究的方法对蒸汽回转干燥机的传热机理进行研究是极具价值的。分析了脱硫石膏蒸汽回转干燥机理、换热管传热过程和干燥机传热学参数对传热效果的影响,介绍了干燥机的主要特征参数和换热管传热系数的一般计算方法以及方法中存在的问题。为分析脱硫石膏蒸汽回转干燥机主要工艺参数对干燥传热的影响规律,设计了一套蒸汽回转实验系统,论述了实验原理和实验流程,并对实验设备和仪表进行了标定。为准确获得测量数据,设定了脱硫石膏蒸汽回转实验台实验参数,并通过对石膏粉颗粒在干燥机内六种状态的分析,确定实验转速,同时设计了实验台热损失的测定实验、冷态实验步骤和热态干燥实验步骤。利用脱硫石膏蒸汽回转实验台进行了冷态和热态共计54组实验。为分析筒体转速、物料填充率、换热管位置、换热管翅化对脱硫石膏蒸汽回转干燥系统平均换热系数和换热管对物料作用时间的影响,对所得数据进行了分类和分析,获得各因素对传热的影响曲线。
[Abstract]:In desulphurization gypsum resource treatment process, steam rotary drying process is recognized by gypsum industry for its advantages.Because the heat transfer of steam rotary dryer is very complex, there is no design criterion at home and abroad, and the related research results are scarce.It is very valuable to study the heat transfer mechanism of steam rotary dryer by means of theoretical analysis and experimental study.The mechanism of steam rotary drying of desulphurized gypsum, the effect of heat transfer process of heat transfer tube and the heat transfer parameters of dryer on the heat transfer effect are analyzed.This paper introduces the main characteristic parameters of dryer, the general calculation method of heat transfer coefficient of heat transfer pipe and the problems existing in the method.In order to analyze the influence of main technological parameters on drying heat transfer of desulphurized gypsum steam rotary dryer, a steam rotary experimental system was designed, the experimental principle and flow were discussed, and the experimental equipment and instrument were calibrated.In order to obtain the measurement data accurately, the experimental parameters of the desulfurized gypsum steam rotary test bench were set up, and the rotational speed of the experiment was determined by analyzing the six states of the gypsum powder particles in the dryer. At the same time, the experiment was designed to measure the heat loss of the test bench.Cold state experiment step and hot state drying experiment step.A total of 54 groups of experiments were carried out in cold and hot state by means of desulphurization gypsum steam rotary test bench.In order to analyze the effects of cylinder speed, material filling rate, heat transfer pipe position, fin of heat transfer pipe on average heat transfer coefficient and heat transfer pipe time of desulphurized gypsum steam rotary drying system, the data obtained are classified and analyzed.The influence curves of various factors on heat transfer are obtained.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ177.375

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