一、引言 目前,我国有相当数量的沸腾燃烧锅炉正在运行,但燃烧效率很低,成为发展沸腾燃烧锅炉的关键。国外采用飞灰复燃床以提高燃烧效率,但它的系统很复杂,高温飞灰的捕集、传输使技术上的要求提高,锅炉造价增加,竞争能力降低。此外,加大流化燃烧床上方的沉降空间,以捕获飞灰粒子使其复燃的方法,实际上无明显效果,反使 I. INTRODUCTION At present, a considerable number of boiled-fired boilers are running in our country, but the combustion efficiency is very low, becoming the key to the development of boiled-fired boilers. However, its system is very complex. The capture and transmission of high temperature fly ash raise the technical requirements, the cost of the boiler is increased, and the competitive power is reduced. In addition, the method of increasing the settling space above the fluidized bed in order to capture the particles of the fly ash to reignite has practically no effect