一、粉煤灰的形成及其活性以煤作为燃料的发电厂,一般都将原煤磨成细粉。煤粉经过预热的空气,以一定的比例沿煤粉管道吹入炉膛内进行燃烧。为使煤粉在膛内得到充分燃烧,一般还有二次和三次风管道,将预热的空气按一定比例吹入炉膛,以利于进一步助燃。现代大中型电气锅炉,普遍采用煤粉在炉膛内呈悬浮状烧尽。煤粉中的不燃物,主 First, the formation of fly ash and its activity As a coal-fired power plant, the raw coal are generally ground into fine powder. Pulverized coal through the preheated air to a certain percentage of pulverized coal pipe blowing into the furnace for combustion. In order for the pulverized coal to be fully burned in the bore, there are generally secondary and tertiary air ducts, and the preheated air is blown into the furnace at a certain ratio to facilitate further combustion. Modern large and medium-sized electric boiler, the general use of coal in the furnace was suspended burning. In the non-combustible coal, the main