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›› 2008, Vol. 8 ›› Issue (5): 914-919.

• 过程与工艺 • 上一篇    下一篇

煤高温空气气化实验研究

蔡九菊 王连勇 赵子忠 赵子忠   

  1. 东北大学国家环境保护生态工业重点实验室 东北大学国家环境保护生态工业重点实验室 东北大学国家环境保护生态工业重点实验室
  • 收稿日期:2008-06-13 修回日期:2008-08-15 出版日期:2008-10-20 发布日期:2008-10-20
  • 通讯作者: 王连勇

Experimental Investigation on High Temperature Air Coal Gasification

CAI Jiu-ju LI Ming-jie ZHAO Zi-zhong   

  1. SEPA Key Laboratory on Eco-industry, Northeastern University
  • Received:2008-06-13 Revised:2008-08-15 Online:2008-10-20 Published:2008-10-20

摘要: 在内径200 mm的固定床气化炉装置上进行了以高温空气/蒸汽作为气化剂的煤高温空气气化实验,考察了空气预热温度、气化温度、空气/煤比和蒸汽/煤比等工艺参数对煤气化指标的影响. 结果表明,在其他条件不变的情况下,空气预热温度由500℃提高到800℃时,煤气热值提高32.5%. 气化温度越高对气化过程越有利,但在固态排渣条件下,气化温度的提高受煤灰熔点的限制. 空气/煤比和蒸汽/煤比对气化指标的影响本质上是通过改变气化温度来实现的. 对于特定的固定床气化工艺,空气/煤比和蒸汽/煤比均存在最佳操作区域. 在本实验条件下,其优化值分别为1.55~1.8 Nm3/kg和0.25~0.35 kg/kg.

关键词: 高温空气气化, 固定床, 工艺参数

Abstract: The high temperature air/steam as gasifying agent was applied in gasification of coal with a 200 mm internal diameter fixed bed gasifier. The effects of process parameters such as temperature of gasifying agent, gasification temperature, ratio of air to coal and ratio of steam to coal on gasification performance were studied. The experimental results indicated that the gas heat value increased 32.5% with the temperature of air from 500℃ to 800℃. The increase in gasification temperature availed the gasification process, but its increase was limited by the melting point of ash in the condition of solid slag emission. The effects of ratio of air to coal and ratio of steam to coal on coal gasification performance were realized by changing the gasification temperature, and the two parameters had an optimum operating range for a certain fixed bed coal gasification process. In the experimental conditions, they should be controlled in the ranges from 1.55 to 1.8 Nm3/kg and from 0.25 to 0.35 kg/kg, respectively.

Key words: high temperature air gasification, fixed bed, process parameters

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