新型三功能煤粉锅炉燃烧器

A New Type Tri-Functional Burner for Pulverized Coal Fired Boilers

三功能燃烧器是在偏置射流预燃室的基础上发展起来的一种新型煤粉燃烧器。它是利用一次风射流、控制射流和整流射流组合的空气动力学原理研制的，具有锅炉冷态点火启动、低负荷稳定火焰和作主燃烧器运行三项功能。该燃烧器可利用锅炉原有的供粉系统和一次风管道，并能在运行中方便地转换稳焰和主燃烧器功能，及调节着火点的距离。试验和运行表明，该燃烧器完全能够满足锅炉调峰的要求。具有重要的实用价值和显著的节油效果。

The tri-functional burner is a novel type of coal combustor,based on the eccentric jet precombustor.It utilizes the aerodynamic principle of a combination of the primary,control and rectifying jets.The burner can be operated in three modes:Starting of a cold boiler,flame stabilizing at low loads and acting as a main burner.The original pulverized coal system and the primary air pipe of the boiler are still used for this burner.The operator can conveniently switch between the functions of flame stabilization and main burner during operation,and adjust the distance of ignition point. The results of tests and routine operation show that the requirement of wide turndown ratio for the boiler due to load variations can be fully satisfied.The practical value and economic efficiency of this technology are quite evident.