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›› 2013, Vol. 13 ›› Issue (5): 748-753.

• 流动与传递 • 上一篇    下一篇

新型旋流式氧煤喷枪的喷煤特性

张宗旺 秦雪刚   

  1. 北京科技大学冶金与生态工程学院 北京科技大学冶金与生态工程学院
  • 收稿日期:2013-06-25 修回日期:2013-07-18 出版日期:2013-10-20 发布日期:2013-10-20
  • 通讯作者: 秦雪刚

Injection Characteristics of Coal Powder by a New Type Swirling Oxygen-Coal Lance

ZHANG Zong-wang QIN Xue-gang   

  1. School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing
  • Received:2013-06-25 Revised:2013-07-18 Online:2013-10-20 Published:2013-10-20
  • Contact: QIN Xue-gang

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摘要： 对比研究了一种新型旋流式氧煤喷枪与普通单管喷枪的喷煤特性，主要考察了直吹管内流场、浓度场及煤粉的燃烧情况. 结果表明，采用该氧煤枪喷吹时，在直吹管内形成的低速区面积更大，在距喷枪口30 mm范围内形成了明显的回流区，在距喷枪口200 mm范围内形成了富氧、富煤的强湍流区域；与普通单管喷枪相比，旋流式氧煤喷枪使煤粉温度提高近100 K，有助于挥发分挥发，燃尽率由4.96%提高到15.53%.

关键词: 喷煤, 旋流式氧煤喷枪, 数值模拟, 流场, 浓度场, 燃烧

Abstract: Injection characteristics of coal powder by a new type swirling oxygen-coal lance were studied in comparison with an ordinary single-tube one, and. the flow field, concentration field and pulverized coal combustion in the blowpipe examined. The results showed that the new lance generated a greater low velocity zone in the blowpipe, within 30 mm away from the outlet of the lance a clear recirculation zone formed, and within 200 mm away from that an oxygen enrichment zone with high pulverized coal concentration and strong turbulence formed. When the new swirling oxygen-coal lance was used, coal powder temperature was raised near 100 K, being beneficial to volatilization of volatiles in the coal, and its burnout rate was increased from 4.96% to 15.53%.

Key words: pulverized coal injection, swirling oxygen-coal lanc, numerical simulation, flow field, concentration field, combustio

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