煤粉气流强迫点火特性试验研究  

Experimental Investigation of the Characteristics of Forced Ignition by Pulverized Coal-air Flows

作　　者：顾中铸[1] 王志斌[2] 张永廉[3] 

机构地区：[1]南京师范大学动力工程学院,江苏南京210042 [2]江苏省电力设计院,江苏南京210092 [3]东南大学洁净煤燃烧与发电技术教育部重点实验室,江苏南京210096

出　　处：《热能动力工程》2004年第4期389-391,共3页Journal of Engineering for Thermal Energy and Power

摘　　要：在一座小型煤粉燃烧试验台上 ,对不同条件下 ,两种煤粉气流的强迫点火特性进行了试验研究。结果表明 ,用火炬引燃煤粉气流 ,存在一个对应于最低煤粉浓度的最佳点燃速度 ;煤粉气流的着火界限主要受初始温度、点火源温度、煤种和煤粉细度的影响 ;提高煤粉气流的初始温度、点火源温度和煤粉细度均可使着火范围变宽 ,挥发份含量高的煤种点火容易。在相同条件下 ,直流煤粉气流比旋转煤粉气流容易点燃。On a small-sized combustion test rig for pulverized coal an experimental investigation was performed of the forced ignition characteristics of two types of pulverized coal-air flow under different conditions. The results of the investigation indicate that in case of igniting pulverized coal-air flows by torches there exists an optimum ignition speed corresponding to the minimum concentration of the pulverized coal. The pulverized coal-air flow ignition limit is mainly influenced by such parameters as initial temperature, ignition source temperature, coal rank and the fineness of the pulverized coal. The enhancement of the initial temperature of the pulverized coal-air flow, the ignition source temperature and the fineness of the pulverized coal can all widen the range of ignition. It is relatively easy to ignite coal with a high volatile content. Under the same conditions it is easier to ignite a straight pulverized coal-air flow than a swirling one.

关 键 词：煤粉气流 点火 着火界限 

分 类 号：TK224.1[动力工程及工程热物理—动力机械及工程]