煤粉气流在交变电磁场与高温壁面协同作用下着火过程的机理研究  

Puverized Coal Stream Ignition Under the Effct of Electromagnitic Filed and High Temperature Wall

作　　者：李文蛟[1] 李琳琅[2] 邱建荣[1] 郑楚光[1] 岑可法[3] 曹欣玉[3] 周俊虎[3] 

机构地区：[1]华中科技大学煤燃烧重点实验室,湖北武汉430074 [2]西安交通大学,陕西西安710049 [3]浙江大学,浙江杭州310027

出　　处：《锅炉技术》2003年第3期24-27,共4页Boiler Technology

摘　　要：详细研究了在感应式无油直接点火燃烧器点火室中 ,煤粉气流在着火过程中的机理。研究表明 :煤粉气流在感应式加热无油直接点火器中的着火过程 ,是交变电磁场与高温壁面加热协同作用的结果。交变电磁场是针对煤粉气流在着火过程中有关特征发生变化 :煤粉颗粒的半导电性 ;挥发分及中间产物的极性、分子的电负性 ;大量存在的、特别是燃烧产物中的各种带电离子。煤粉气流在感应式加热无油直接点火器着火过程中所表现出的特征 。Pulverized coal stream ignition process in a new type of no oil ignition aid burner , which using the method of electromagnetic induction , has been investigated. The results show that: the ignition process is influenced both by the electromagnetic filed and the wall with high temperature; The electromagnetic filed influence the ignition process on that: pulverized coal particles as semiconductor; polar molecules in the volatile matter; molecules bonds can be broken off under the influence of frequent electromagnetic filed; the ions produced in the ignition process. These special characters prove that this new type of no oil ignition aid burner has some potential advantages.

关 键 词：交变电磁场 燃烧 着火 

分 类 号：TQ534[化学工程—煤化学工程]