【摘要】 在100%、75%和50%负荷下以及不同煤粉细度下对某660MW旋流对冲燃煤锅炉进行燃烧过程数值模拟计算,分析了影响该类型锅炉结渣的因素.结果表明:100%负荷下炉膛左右墙19~24m高度截面中间区域出现结渣的概率最大,75%负荷下炉膛左右墙21~23m高度截面中间区域最有可能出现结渣情况,50%负荷下炉内出现结渣的可能性最小;当煤粉细度为10μm时,炉膛左右墙出现结渣的区域为23~28m高度截面的中间区域,且煤粉细度减小会加快煤粉着火速度,提高炉膛整体温度,增大炉内可能出现结渣情况的区域面积.更多还原

【Abstract】 To analyze the factors influencing the slagging behavior of a 660 MW swirl-opposed coal-fired boiler,numerical simulations were carried out to its combustion process respectively under 100%,75%and 50% unit load,with coal particles of different sizes.Results indicate that in the case of 100%load,slagging mostly tends to be formed in the middle area of both the right and left wall at elevation 19-24 m,and in the case of 75%load,slagging is most probable to be formed in the middle area of both the right and left wall at elevation 21-23 m,and for the 50%load,slagging is least probable in the furnace.For coal particles of size 10μm,slagging tends to be formed in the middle area of both the right and left wall at elevation 23-28 m,and the finer the coal particles,the faster the ignition of pulverized coal,resulting in improved temperature and increased area of slagging in the furnace.更多还原