...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Fuel Processing Technology >Numerical analysis on effect of furnace scale on heat transfer mechanism of coal particles in pulverized coal combustion field
【24h】

Numerical analysis on effect of furnace scale on heat transfer mechanism of coal particles in pulverized coal combustion field

机译：炉垢对煤粉燃烧场中煤颗粒传热机理影响的数值分析

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

To investigate the effect of the furnace scale on the heat transfer mechanism of coal particles, numerical simulations of coal combustion fields in three different scale furnaces (915 MWth actual large scale boiler, 2.4 MWth and 0.76 MWth test furnaces) were conducted. High accuracy of simulation methods was validated with the measured data. From the comparison of numerical simulations between three different scale furnaces, it was clarified that the particle residence time with high particle temperature for a small scale furnace is shorter than that for a large scale furnace even if the particle residence time passing the high temperature gas is the same. This is caused by the insufficient heat gain of particles for a small scale furnace due to the lower radiation heat transfer because of the thinner flame thickness in the small furnace. The sphericity of ash particles from small scale furnaces is lower than that for large scale furnaces due to the shorter particle residence time with high particle temperature. These findings should be considered when the usability of coal brands for actual large scale boilers is evaluated by the fly ash properties from a small scale experimental furnace. (C) 2016 Elsevier B.V. All rights reserved.
机译：为了研究炉规模对煤颗粒传热机理的影响，对三种不同规模的炉（915 MWth大型锅炉，2.4 MWth和0.76 MWth试验炉）的煤燃烧场进行了数值模拟。实测数据验证了仿真方法的高精度。通过对三种不同规模炉的数值模拟的比较，可以看出，即使通过高温气体的颗粒停留时间为10min，小型炉的颗粒温度较高的颗粒停留时间也比大型炉的短。相同。这是由于由于小型炉中较薄的火焰厚度导致较低的辐射热传递而导致的小型炉的颗粒热量获取不足。由于在较高的颗粒温度下较短的颗粒停留时间，因此来自小型炉的灰烬颗粒的球形度低于大型炉的球形度。当通过小型实验炉的粉煤灰特性评估煤品牌在实际大型锅炉中的可用性时，应考虑这些发现。 （C）2016 Elsevier B.V.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号