...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Fuel >The behavior of flame front with heating mechanisms in two entrained-bed coal reactors
【24h】

The behavior of flame front with heating mechanisms in two entrained-bed coal reactors

机译：两个夹带床煤反应器中带有加热机制的火焰前沿行为

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

An experimental study was carried out in two laboratory-scale coal reactors to investigate the effect of heating rate on a pulverized coal flame. Each reactors had different heating mechanisms. For reactor A losing large heat through transparent quartz wall, pulverized coal particles were ignited by secondary air of 1050 K. Flame front could be visualized through the transparent wall. Reactor B was insulated with castable refractory to minimize the heat loss through the reactor wall and accompanied with secondary air of 573 K. Flame front was estimated from the gas temperature and species concentration measured using R-type thermocouple(Pt-Pt/Rh 13/100) and gas chromatograph at various coal-air ratios and swirls. The flame front position was closely related with heating rate. The heating rate for lifted flame was of the order of 10~4-10~5 K/s and for ignition at least over 10~4 K/s. The heating mechanism had little impact on the extinction limits. The swirl forced the flame front to move toward the upstream by the rapid mixing of coal and air. However, it slightly increased the carbon conversion and the cold gas efficiency only below immediately fuel-rich conditions due to relatively low reactor temperature and a little increased residence time.
机译：在两个实验室规模的煤反应堆中进行了一项实验研究，以研究加热速率对煤粉火焰的影响。每个反应器具有不同的加热机理。对于通过透明石英壁散失大量热量的反应堆A，粉煤颗粒被1050 K的二次空气点燃。可以通过透明壁看到火焰锋。反应器B用浇铸的耐火材料绝缘，以最大程度地减少通过反应器壁的热损失，并伴有573 K的二次空气。使用R型热电偶（Pt-Pt / Rh 13 / 100）和气相色谱仪在不同的煤-空气比和旋流下。火焰前沿位置与加热速率密切相关。提升火焰的加热速率约为10〜4-10〜5 K / s，点火至少达到10〜4 K / s。加热机理对消光极限影响很小。旋流通过煤和空气的快速混合迫使火焰前沿向上游移动。然而，由于相对较低的反应器温度和略微增加的停留时间，仅在紧挨富燃料的条件下，它稍微增加了碳转化率和冷气效率。

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