期刊文献+

颗粒帘换热器中气粒两相换热特性实验研究

Experimental Investigation on Heat Exchange Characteristics Between Gas andParticle in a Particle-Curtain Heat Exchanger
原文传递
导出
摘要 根据某1 t/h燃煤工业锅炉空气预热器的热力参数,设计并搭建了一套颗粒帘空气预热器模拟实验系统,研究了不同进气温度Tg0(150~300℃)、进气速度Vg0(0.9~1.5m/s)、颗粒帘进口厚度b0 (60~180 mm)、颗粒粒径dp(150~212μm)以及不同颗粒质量流量ms (550~2150 g/s)工况条件下热空气与进口温度tp0=20℃的硅砂颗粒帘间的换热特性。结果表明:影响颗粒帘换热器中气粒两相换热特性因素的重要性次序为进气温度、进气速度、颗粒质量流量、颗粒粒径、颗粒帘进口厚度;换热端差最低可至4.5℃,最大可达87℃;颗粒帘及颗粒帘出口气流的温度沿颗粒下落方向在前期上升迅速(186~475℃/m)而后期上升比较缓慢(60~108℃/m),并且在0~0.5 m和0.5~1.0 m的高度范围可分别用线性和对数方程来描述。 A particle-curtain-based air heater experimental modeling device is designed and built based on an air heater of a 1 t/h coal fired industrial boiler,and on this device,heat exchange characteristics between hot air and silicon sand particle of 20℃at inlet of the curtain are investigated under different conditions such as inlet air temperatures Tg0(150~300℃),inlet air velocity V0(0.9~1.5 m/s),particle-curtain’s inlet thickness b0(60~180 mm),particle diameter dp(150~212μm)and particle mass flow ms(550~2150 g/s)and the results show that:the sequence of factors according the importance influencing heat transfer between particle and air in the curtain are inlet air temperature,inlet air velocity,particle mass flow,particle diameter and inlet thickness of particle curtain;and the temperature between air at the inlet and particle at the outlet range from 4.5℃to87℃,and temperature of particles and that of air at outlet of the curtain increase promptly(186~475℃/m) but slowly(60.23~108.43℃/m)at the initial and later stage of falling curtain,respectively,and these temperatures can be described with linear and logarithm equations between the height of0~0.5 m and 0.5~1.0 m of the curtain,respectively.
作者 陈冬林 魏绵源 饶壮 CHEN Dong-Lin;WEI Mian-Yuan;RAO Zhuang(School of Aeronautics and Astronautics,Shanghai Jiao Tong University,Shanghai 200240,China)
出处 《工程热物理学报》 EI CAS CSCD 北大核心 2020年第3期653-660,共8页 Journal of Engineering Thermophysics
基金 湖南省科技计划项目(No.2013KG3193) 湖南省教育厅科学研究基金重点资助项目(No.10A004)。
关键词 硅砂 颗粒帘 换热器 换热特性 silica sand particle curtain heat exchanger heat exchanger characteristics
  • 相关文献

参考文献5

二级参考文献33

  • 1邝平健,刘文铁,曹伟武.循环流化床稀相区对流换热的理论分析和实验研究[J].节能技术,2006,24(5):429-433. 被引量:4
  • 2冯绍航,徐德龙,李辉,陈延信,肖国先.篦冷机中气固两相换热过程的模拟研究[J].西安建筑科技大学学报(自然科学版),2007,39(2):224-229. 被引量:18
  • 3Bi H T,Circulating Fluidized Bed Technology.3,1990年
  • 4Wu R L,AIChE J,1989年,35卷,10期,1685页
  • 5Bi H T,Fluidization.6,1989年
  • 6Tung Y,Fluidization.Science and Technology,1988年
  • 7匿名著者,1983年
  • 8廖传华,任晓乾,王重庆.反应过程与设备[M].北京:中国石化出版社,2008.
  • 9Ouyang S, Mao Q M, Rhodes M, et al. Short contact time gas-solid systems[J]. Reviews in Chemical Engi- neering,2003,19 (2) : 133-228.
  • 10Rajan K S,Dhasandhan K, Srivastava S N, et al. Stud- ies on gas solid heat transfer during pneumatic conve-ying [J]. International Journal of Heat and Mass Transfer,2008,51(11) :2801-2813.

共引文献21

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部