中文摘要：

生物质成型燃料具有环保、成本低等优点,但小型燃油锅炉改燃生物质成型燃料后,烟气流速显著增大,并带有飞灰颗粒,可能磨损炉膛。根据实际飞灰颗粒直径的大小分类,本文通过数值模拟分析了D1、D2、D3和D4四种颗粒在不同烟气流速下对炉膛磨损位置和磨损量的影响。结果表明：D1、D2和D3未对炉膛壁面造成磨损;D4撞击回燃室壁面反弹至炉膛壁面造成磨损,磨损量随流速增大而增大;磨损面主要为炉膛中部及尾部之间的下侧壁面。

英文摘要：

The biomass molding fuel（BMF）have many advantages such as low cost and eco-friendIy. Using BMF for oil-burning boiler will increase the velocity of gas carrying different particles and hence probably abrading the boiler furnace. The particles were classified into D1, D2, D3 and D4 based on different diameters and the abrasion caused by them at different velocities was numerically analyzed. The results show that D1, D2 and D3 had no effect on the furnace. D4 results in the abrasion crashing on the furnace, due to the reflection of them from the wall of back burning furnace. The amount of abrasion caused by D4 increases as velocity goes up; the impaired wall is the downside surface between the middle and the end of furnace.