Co-firing coal slime in circulating fluidized bed (CFB) boilers is an effective method for utilizing coal slime, as industrial solid waste, with high water content, high viscosity, high ash content and low calorific value. In order to study the morphology and drying characteristics of coal slime dough injected into the furnace, this paper studied in detail the influence of compression degree and water content on the tensile force of coal slime dough. The results show that the degree of compression is positively correlated with the tensile force of coal slime dough, while, the water content is negatively correlated. A one-dimensional quadratic mathematical relationship between the tensile force of coal slime dough and the water content is established. At different feeding locations, i.e., at the top or middle of the boiler furnace, the breaking length of the coal slime dough was predicted. With top feeding, the length is 0.17 m, and that value for the middle feeding is about 0.15 m. Using the coupling model of the movement and drying of coal slime dough inside the furnace of the CFB boiler, the temperature change of the slime dough was calculated. The results showed that the surface temperature of coal slime dough rose rapidly during the drying process, then decreased slowly before it dived into the dense bed. When the furnace temperature is 900 °C and furnace height is about 38 m, the temperature of the slime surface can reach 200 °C at the highest.

公司-在循环流化床（CFB）锅炉中燃烧煤泥是利用煤泥作为工业固体废物的一种有效方法，该工业固体废物具有高含水量、高粘度、高灰分和低热值。为了研究煤泥面团入炉后的形态和干燥特性，本文详细研究了压缩程度和含水量对煤泥面团拉伸力的影响。结果表明，压缩程度与煤泥面团的拉伸力呈正相关，而与含水量呈负相关。建立了煤泥面团的张力与含水量之间的一维二次数学关系。在不同的进料位置，即在锅炉炉膛的顶部或中部，预测煤泥面团的断裂长度。顶部进料时，长度为 0.17 m，中间进料时该值约为 0.15 m。利用CFB锅炉炉膛内煤泥面团运动与干燥的耦合模型，计算了煤泥面团的温度变化。结果表明，煤泥面团表面温度在干燥过程中迅速上升，然后缓慢下降，然后潜入致密床层。当炉温为900℃，炉高约38m时，煤泥表面温度最高可达200​​℃。利用CFB锅炉炉膛内煤泥面团运动与干燥的耦合模型，计算了煤泥面团的温度变化。结果表明，煤泥面团表面温度在干燥过程中迅速上升，然后缓慢下降，然后潜入致密床层。当炉温为900℃，炉高约38m时，煤泥表面温度最高可达200​​℃。利用CFB锅炉炉膛内煤泥面团运动与干燥的耦合模型，计算了煤泥面团的温度变化。结果表明，煤泥面团表面温度在干燥过程中迅速上升，然后缓慢下降，然后潜入致密床层。当炉温为900℃，炉高约38m时，煤泥表面温度最高可达200​​℃。