多通道烘缸传热特性研究  

Research on Heat Transfer Characteristics of Multi-channel Dryer

作　　者：严彦 董继先[2] YAN Yan;DONG Jixian(School of Mechanical and Electrical Engineering,Xi’an Polytechnic University,Xi’an 710048,China;School of Mechanical and Electrical Engineering,Shaanxi University of Science&Technology,Xi'an 710021,China)

机构地区：[1]西安工程大学机电工程学院,陕西西安710048 [2]陕西科技大学机电工程学院,陕西西安710021

出　　处：《造纸科学与技术》2020年第1期7-10,共4页Paper Science & Technology

基　　金：国家自然科学基金(51375286);陕西省教育厅科研计划项目(19JK0374);西安工程大学博士科研启动项目(BS201807);西安市现代智能纺织装备重点实验室项目(2019220614SYS021CG043).

摘　　要：传统烘缸的结构会造成冷凝水无法排出,致使烘缸能耗增大。多通道烘缸以其新颖的结构设计使得这种现状有所改变。为更加清楚的了解多通道烘缸的改进特性,对此进行了相关研究。研究结果表明:蒸汽冷凝传热系数随着蒸汽质量流速的增大而增加,且冷凝传热系数的增加幅度也随质量流速的增加而变大。而随着蒸汽干度的增大,冷凝传热系数几乎呈线性增加。在蒸气冷凝流动过程中,沿其流动方向的冷凝传热系数也逐渐减小。In a conventional dryer cylinder, the condensate water is hard to be discharged due to its structure, resulting in energy consumption increase. Multi-channel dryers make this situation change with its novel structural design. In order to understand the improved characteristics of the multi-channel dryer more clearly, the relevant research was carried out. The results showed that heat transfer coefficient of steam condensation increased with the increase of steam mass flow rate, and the increase range of the heat transfer coefficient of steam condensation also increased with the increase of mass flow rate. With the increase of steam dryness, the condensation heat transfer coefficient almost increased linearly. In the process of vapor condensation flow, the condensation heat transfer coefficient along its flow direction also decreased gradually.

关 键 词：多通道烘缸 冷凝 传热 矩形小通道 

分 类 号：TQ021.3[化学工程]