在工业锅炉的各项热损失中,机械不完全燃烧损失占有相当大的比重。它主要由块渣、飞灰的机械不完全燃烧损失(Q_4)和炉排的漏煤损失等组成。这里牵涉的因素较多,如炉体结构、燃烧设备、操作水平甚至负荷大小等。但是燃料中细小煤屑的份额过多则是导致各项Q_4产生的主要原因。 一、各种工业锅炉对煤屑的份额要求 锅炉燃烧设备不同,对煤的粒度及其份额均有不同的要求。 譬如,抛煤机炉因为其燃烧要求抛到炉排上的煤在炉膛的长度和宽度方向以及煤层的厚度皆需保持均匀。而煤的粒度又直接影响抛煤机的射程。从而它对各种粒度的煤的 In the industrial boiler heat loss, the mechanical incomplete combustion losses account for a large proportion. It is mainly composed of block slag, fly ash mechanical incomplete combustion loss (Q_4) and grate coal leakage loss and other components. There are many factors involved, such as the furnace structure, combustion equipment, the level of operation and even load size. However, too much fuel in the proportion of small coal chips is the main reason leading to the occurrence of Q_4. First, all kinds of industrial boilers on the share of coal chips Boiler combustion equipment requirements, the size and share of coal have different requirements. For example, a coal-fired boiler requires that the coal thrown on the grate is uniformly distributed in the length and width of the furnace and the thickness of the coal seam because of its combustion requirements. The particle size of coal has a direct impact on the range of the coal thrower. So it’s for various sizes of coal