【摘要】 针对惰性粒子流化床干燥器,以洗衣粉悬浮液为对象,先后进行了气体分布板开直孔和开斜孔的流化干燥实验。通过测定干燥器的流体力学特性曲线,以及在相同进料量、进风温度、进风速度或惰性粒子直径条件下的体积传热系数曲线和热效率曲线,考察和分析了气体分布板两种不同的开孔结构对干燥器流体力学和传热性能的影响。结果表明,气体分布板开斜孔的床内气流阻力要高于开直孔的气流阻力,但其体积传热系数和热效率相对较高,即斜孔较直孔更加有利于床内传热。在此基础上,对惰性粒子流化床干燥器的生产调节措施进行了初步探讨。更多还原

【Abstract】 The gas distributor,as an important part of fluidized bed drier,can directly affect the drying property of drier.For comparing the hydromechanics and heat transfer property of inert particles fluidized bed drier between vertical-hole distributor and titled-hole distributor,the drying processe of detergent suspending liquor was experimented in this paper.The characteristic curves of hydromechanics,volumetric heat transfer coefficient and heat efficiency of drier were carefully determined under the same experimental parameters,such as feed volume,gas temperature of entrance,gas rate of entrance,and diameter of inert particles.The experimental results show that the structure of opening hole in gas distributor has a dual effect on fluidized drying.Compared with vertical-hole distributor,titled-hole distributor will increase the flow resistance of gas,but it will promote the heat transfer of drier.Based on the results,some advice was proposed in the conclusion of this paper to improve the performance of inert particles fluidized bed drier.更多还原