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咨询热线:183 36008373

煤粉燃烧器的结构性能

发表日期: 2018-11-24 文章来源: 郑矿机器

       煤粉燃烧器,指能够让煤粉在短时间内充分燃烧,产生高温涡流的设备。其中回转窑专用煤粉燃烧器应用比较广泛,河南郑矿机器有限公司科研人员指出,煤粉燃烧器的使用能大大提高回转窑设备的性能和煅烧效率。

       对于煤粉燃烧器的内部构造和性能,有着丰富经验的郑矿机器工程师指出,预分解以后的生料进入到窑内,需要继续吸热升温至1400度左右才能烧成熟?#31232;?#22238;转窑内热量主要是由窑内的煤粉燃烧装置提供,它是由喷煤管、喷煤嘴与燃烧带三部份所组成。其中喷煤嘴是最为重要的组成部份。      

       喷煤嘴位于窑头,煤粉随空气以一定的流速从喷煤嘴喷出,与周围的热空气接触后进行燃烧,形成一定的火焰形状,将热量传给生?#31232;?#29028;粉的燃烧空气可以分为两个部份,一部份是输送煤粉、将煤粉与空气混合均?#29123;?#20379;挥发份燃烧所用的一次空气。另一部份是依靠预热机风车从冷却机中抽上来的高温高氧的二次空气,二次空气主要是供固定碳进行燃烧。传统的喷煤嘴只是用一次空气与煤粉混合后再一起喷出,所形成的火焰风煤混合不是很好,在火焰的中心通风不良,不便调节。在开窑点火时非常的?#29615;?#20415;。目前普遍所用的是较为先进的多风道喷煤嘴。      

       喷煤嘴分为四部份组成,由外到内分别为: 外圈一次空气,煤粉圈,内圈一次空气,以?#30333;?#20869;圈的喷油管(喷油管只在点火或者没有煤时才使用)。各风道都有各自的动力系统、阀门调节系?#36710;齲?#35843;节火焰非常的方便。其中一次风管外圈的作用为:      

       1. 冷却喷煤嘴      

       2. 帮助煤粉燃烧,提供挥发份燃烧所需的氧      

       3. 控制轴向的火焰形状      

       一次风管内圈的作用为:

       1. 帮助火焰扩散,在喷嘴中心形成?#33073;?#21306;                            

       2. 帮助煤粉燃烧,提供挥发份燃烧所需的氧                            

       3. 控制径向的火焰形状

       正常工作时,煤粉夹在内外圈的气体之间,在内圈空气的内部中形成一个?#33073;?#21306;,使空气与煤粉在此回旋能充份混?#31232;?#22312;外圈空气的外部也形成一个?#33073;?#21306;,带动高温的二次空气与煤粉进行混合,供氧供热进行燃烧。一般增大内圈空气压力,降低外圈空气压力,会使煤粉与空气混合更快,使所形成的火焰缩短。如果内圈压力减小,外圈压力提高,会?#22815;?#28976;伸长。

       河南郑矿机器有限公司生产的煤粉燃烧器具有特殊设计的多级多嘴?#22836;?#23548;向结构,具有燃烧完全,热利用率高,消烟除尘、高效节能,改善工作条件,减轻劳动强度等优点,是客户配套回转窑设备的最优选择。


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