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煤粉气流在高温空气中着火与熄火的试验研究
引用本文:聂欣,周志军,吕明,周俊虎,岑可法.煤粉气流在高温空气中着火与熄火的试验研究[J].中国电机工程学报,2008,28(14):67-72.
作者姓名:聂欣  周志军  吕明  周俊虎  岑可法
作者单位:1. 杭州电子科技大学机械工程学院,浙江省,杭州市,310018
2. 能源清洁利用国家重点实验室(浙江大学),浙江省,杭州市,310027
摘    要:提出了一种新型的高温空气煤粉直接点火燃烧器,并建立了相关试验系统平台。选用神华混煤,在成功点燃冷态煤粉气流的基础上,对影响着火与熄火热空气温度的各个因素(煤粉粒径、煤粉浓度、一次风流量、热风流量)进行了试验研究。试验结果表明,随着一次风流量的增大或煤粉浓度的降低,着火与熄火热空气温度下降,且一次风流量的影响更为显著;热风流量对其影响呈现两面性。在3种试验煤样中,粒径分布越细的煤样,其着火与熄火热空气温度相差越大。其余各因素对细颗粒煤粉气流的着火热空气度产生的影响比粗颗粒大;而对粗颗粒煤粉气流的熄火热空气温度的影响又大于细颗粒。

关 键 词:煤粉气流  高温空气点火  热空气温度  着火  熄火
文章编号:0258-8013(2008)14-0067-06
收稿时间:2007-09-10
修稿时间:2007年12月25

Experimental Study on Pulverized Coal Flow Ignition and Flameout in High Temperature Air
NIE Xin,ZHOU Zhi-jun,L Ming,ZHOU Jun-hu,CEN Ke-fa.Experimental Study on Pulverized Coal Flow Ignition and Flameout in High Temperature Air[J].Proceedings of the CSEE,2008,28(14):67-72.
Authors:NIE Xin  ZHOU Zhi-jun  L Ming  ZHOU Jun-hu  CEN Ke-fa
Affiliation:NIE Xin,ZHOU Zhi-jun,L(U) Ming,ZHOU Jun-hu,CEN Ke-fa
Abstract:A novel coal combustor and its experimental system were designed for igniting the cold pulverized coal flow by high temperature air (HTA). Based on successful ignition, the factors' effects on the ignition and the flameout temperature of HTA were studied with Shenhua blending coal, such as the particle size and the concentration of pulverized coal, the flow rate of first air and HTA. The results show that the ignition and the flameout temperature of HTA decrease with the decreasing concentration of pulverized coal or the increasing flow rate of first air. The influence of the first air flow rate is more obvious. The HTA flow rate has two-faced influences on them. The difference between the ignition and the flameout temperature of HTA is more striking with the finer pulverized coal among the three experimental samples. The other factors have more remarkable influences on the ignition temperature of HTA to the finer pulverized coal. On the other hand, they have more remarkable influences on the flameout temperature of HTA when the bigger size pulverized coal has been used.
Keywords:pulverized coal flow  high temperature air ignition  temperature of high temperature air  ignition  flameout
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