防水冷壁高温腐蚀的煤粉燃烧技术及工业性试验研究

A Pulverized Coal Combustion Technology for Resistance to Water Cooled Wall High Temperature Corrosion and Industrial Experimental Study

通过对大型电站四角切圆煤粉燃烧锅炉水冷壁高温腐蚀原因的分析，从燃烧的角度提出了水平浓淡分离、单喷嘴分级燃烧，以及通过一次风射流刚性而改善炉内燃烧两相流场，从而解决水冷壁高温腐蚀的煤粉燃烧技术。结合在大型煤粉炉上的工业性试验研究，证明了水平浓淡风煤粉燃烧器具有较强的防水冷壁高温腐蚀及高效、低负荷稳燃、防结渣和低ＮＯｘ 排放的性能。图２ 表３

Based on the analysis of water cooled wall high temperature corrosion in tangentially fired boiler of large power plant, a pulverized coal combustion technology and a horizontal bias combustion pulverized coal burner with side secondary air (HBC SSA burner) with strong resistance to water cooled wall high temperature corrosion has been proposed, which has horizontal bias separation, stage combustion in single nozzle, and can improve the combustion two phase flow field by regulating the “rigidity” of primary air jet. Through its application and industrial experiment in 300 MW tangentially fired boiler, the HBC SSA burner has been proved with advantages of strong resistance to high temperature corrosion and slag, high combustion efficiency, low pollutant emission and good flame stabilization in low boiler load. Figs 2, tables 3 and refs 12.