摘要
为了缓解石油供需矛盾,节约能源,提高电厂的经济效益,发明了基于电磁感应原理的无油点火燃烧器,在3.5 MW的试验用W型锅炉上,进行了着火距离影响因素的试验研究.在保持相同的风速与壁温的条件下,试验通过对燃烧器内轴向温度场的测量,以及出口燃烧产物的取样分析,研究了对电磁感应无油点火燃烧器的不同点火器结构以及煤种、煤粉气流质量分数等因素对着火距离的影响.实验结果表明,着火距离随着点火管内径的增大而增大,随煤粉挥发分的增大而急剧减小,点火能随着管径的增大而减小,并存在一个最佳的旋流强度和煤粉质量分数,使煤粉气流的着火距离最短.
In order to reduce crude oil shortage, save energy, improve economic returns of power plants, no-oil ignition combustor based on electromagnetic induction theory was invented. Experiment was conducted to research the influencing factors of ignition distance in the combustor established on experimental 3.5 MW W-shape boiler. By means of axial temperature field measurements and combustion products analysis, experiment was carried out to study the effect of different construction, different kinds of coal, and different pulverized coal mass percent on ignition distance of the combustor under the experimental conditions of the same primary air velocity and invariable wall temperature. The results showed that the ignition distance increases as the interior diameter of the ignition conductor increases, but decreases as the rise of the volatilization of pulverized coal, and that ignition energy decreases as the interior diameter of ignition tube decreases, and that there are a best rotational intensity and a best pulverized coal mass percent which make the ignition distance the shortest.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2006年第10期1797-1800,共4页
Journal of Zhejiang University：Engineering Science
关键词
无油点火
旋流强度
挥发分
煤粉质量分数
着火距离
no-oil ignition
rotational intensity
volatilization
pulverized coal mass percent
ignition distance
