【作者】 雷照；

【导师】 何潮洪；

【作者基本信息】 浙江大学 ， 化学工程， 2008， 硕士

【摘要】 用于强放热反应的搅拌釜中热量的移出与釜内温度的均匀分布是工业生产应用的一个重要课题。本文研究了二斜叶式搅拌桨(45度倾角)、三叶推进式搅拌桨及三宽叶旋转式搅拌桨在不同搅拌转速下的传热特性,考察了高效传热元件——热管在工作范围内的传热性能,并将热管应用于强放热搅拌釜中,开发出了具有较高传热效率的反应釜。论文在自行设计的直径为300mm、高为600mm的搅拌釜中,研究了三种不同桨型的搅拌桨在水体系中的搅拌传热过程。考察了两种搅拌桨尺寸、三种桨型及不同搅拌转速对搅拌釜内热量传递的影响,选出了较佳的搅拌桨类型、尺寸及搅拌转速。论文考察了不同类型及外观形状的热管在特定工作范围内(40-50℃)的传热性能,结果表明可选择冷凝段与蒸发段成一定夹角的铜-水重力辅助式弯管为搅拌釜用热管。基于强放热搅拌釜内温度分布的特点、结构性状及安装方便,设计了特殊形状的铜.水热管(倒J型热管及倒2型热管),将其引入强放热搅拌釜中,并研究了该搅拌釜的换热性能。更多还原

【Abstract】 Heat transfer in a high exothermic reactors and uniformity of temperature profile in the reactor are very important in industry. Heat transfer performances of three types of agitators, including two-oblique 45 degree agitator, 3 wide-blade propeller agitator and 3 blade marine type propeller agitator with different rotation speeds were investigated. The performances of different heat pipes were also investigated, and some heat pipes were applied in a stirred reactor to develop new reactor which can be used for high exothermic reactions.A stirred reactor was designed with 300mm in diameter and 600mm in height. The heat transfer performances were studied in the stirred reactor using water, including three types of agitators with different ratios of d/D under a variety of rotation speeds. From the experiments, the adequate agitator and rotation speed were determined.The heat transfer performances of heat pipes, with different types and configurations, were also investigated under a temperature range from 40 to 50 degree. Experimental results indicated that the curing tube (with an angle between the condenser section and the evaporator section) was a good choice.A new reactor was developed by applying the heat pipes with special shapes. The performances of the reactor were studied.更多还原