引言随着循环流化床技术的发展,在国外已有不少国家以循环流化床锅炉取代常规煤粉炉,燃用低品位燃料生产蒸汽发电或供热。循环流化床锅炉燃烧的系统如图1所示。用于燃烧的空气从主床下部以很高的速度喷入床内与加入的燃料迅速混合,由于气体夹带作用,固体颗粒不断向上输送,同时在输送过程中进行迅速 Introduction With the development of circulating fluidized bed technology, many countries in the world have replaced conventional pulverized coal fired furnaces with circulating fluidized bed boilers and used low-grade fuel to produce steam for power generation or heat supply. Circulating fluidized bed boiler combustion system shown in Figure 1. The air for combustion is injected into the bed from the lower part of the main bed at a very high velocity and is rapidly mixed with the added fuel. Due to the entrainment of the gas, the solid particles are continuously transported upward while carrying out the rapid