低挥发分煤种大功率等离子点火试验研究  

Experimental investigation on high-power plasmaignition of low volatile coal

作　　者：朱兴营[1] 陈峰[1] 周法[1] 王庆[1] 

机构地区：[1]中国航天空气动力技术研究院电弧等离子应用装备北京市重点实验室,北京100074

出　　处：《电力科技与环保》2016年第5期22-25,共4页Electric Power Technology and Environmental Protection

摘　　要：通过试验研究的方法得到了2种低挥发份煤种等离子点火时的喷枪功率、煤粉浓度和一次风速等运行参数。航天大功率可调节等离子点火试验台以660 MW四角切圆煤粉锅炉单只燃烧器为原型,按照1∶1比例搭建。试验结果表明,为实现成功点火,对于Vdaf（干燥无灰基挥发份含量）为22.14%的贫瘦煤,等离子点火喷枪输出功率不低于386 k W,点火煤粉浓度不低于0.24 kg/kg,点火初期一次风速控制在18.2-19.2 m/s为宜;对于Vdaf为16.4%的贫煤,等离子喷枪输出功率不低于435 k W,点火煤粉浓度不低于0.27 kg/kg,一次风速应控制在18.2-19.2 m/s范围之内。Plasma ignitioncharacteristics of two kinds of low volatile coal areexperimentally studied,the spray gun power,the coal dust concentration and the primary air velocity are includedin the operation parameters. The aerospace high- power ignition test system is set up at 1∶1 scale of the single burner in a 660 MW tangential pulverized coal fired boiler. The experimental result shows that the spray gun power should be no lower than386 k W and the pulverized coal concentration should be no less than 0. 24 kg / kg for successful ignition of the meager- lean coal with volatile content of 22. 14% based on dry ash- free basis. The proper primary wind speed range for early ignition should be 18. 2 m / s - 19. 2 m / s. For the lean coal with volatile content of 16. 4%,the spray gun power should be no lower than 435 k W and the pulverized coal concentration should be no less than 0. 27 kg / kg for successful ignition. The suitable wind speed range should be 18. 2 m / s - 19. 2 m / s.

关 键 词：等离子点火 低挥发份煤种 大功率 煤粉浓度 一次风速 

分 类 号：TM621.2[电气工程—电力系统及自动化]