内冷式刮膜蒸发器粘性流体的传热与蒸发探讨

摘要本文以粘性流体甘油为物料,在内冷式刮膜薄膜蒸发器中进行加热蒸发实验,分析和探讨了内冷式刮膜薄膜蒸发的传热阻力和工艺条件如操作压力、刮板转速和进料流量等因素的影响。研究发现,粘性流体薄膜蒸发时的传热阻力主要在液膜侧;液膜传热系数随刮板转速和流量的增大而增大,随压力的降低而增大;单位时间的蒸发量随刮板转速的增大而增大,随压力和流量的增大而减少。

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	皮丕辉
	杨卓如
	马四朋
	程江

关键词：薄膜蒸发内冷式传热系数甘油

Abstract： Heating and evaporating are experimented in the innercondensing wiped thin film evaporator with feed of viscous glycerol.The heat transfer resistance and the influence of process variables such as operating pressure,rotating speed of wiper and feed speed on the thin film heating coefficient and evaporating capacity per unit of time are analyzed and studied.It is found that the heat transfer resistance of thin film evaporating of viscous liquid mainly lies in the thin film,and thin film heating coefficient increases with rising the rotating speed and feed speed and with decreasing the pressure,and the evaporating capacity per unit of time increases with rising the rotating speed and with decreasing the pressure and the feed speed.

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Received 2003-05-15; published 2003-05-15

引用本文:

皮丕辉,杨卓如,马四朋,程江.内冷式刮膜蒸发器粘性流体的传热与蒸发探讨[J]. 化学工业与工程, 2003,20(3): 150-155

PI Pi-hui,YANG Zhuo-ru,MA Si-peng,CHENG Jiang.Study on the Heat Transfer and Evaporation of Viscous Fluid in the Inner-condensing Wiped Thin Film Evaporator[J]. Chemcial Industry and Engineering, 2003,20(3): 150-155