针对切向燃烧锅炉燃用劣质煤时的稳燃及水冷壁高温腐蚀等问题 ,采用PDA测量系统 ,对四角切圆锅炉中一、二次风同心反切和同心同向燃烧方式进行了气固两相流动特性的实验研究。结果表明 ,与同心同向燃烧方式相比 ,同心反切燃烧方式的气固两相流动特性使其在稳燃、低NOx排放、防结渣、防高温腐蚀等方面具有较优良的性能 Aiming at the problems of stable combustion and high temperature corrosion of water wall when burning low quality coal with tangential combustion boilers, the PDA measurement system was used to conduct the gas-solid two-phase primary and secondary reverse- Experimental Study on Phase Flow Characteristics. The results show that compared with the concentric combustion, the gas-solid two-phase flow characteristics of concentric counter-cutting combustion make it have better performance in stable combustion, low NOx emission, anti-slagging and high temperature corrosion resistance