Combustor gas recirculation boiler structure

The utility model relates to a gas recirculation technical field in the boiler specifically be a combustor gas recirculation boiler structure, and it need not to increase the furnace size and can reduce the furnace temperature, reach and control the slagging scorification formation, reduce cost, and it includes furnace, the last main burner that installs of furnace, main burner includes wind interface and overgrate air interface, wind interface with the air -out direction of overgrate air interface is tangent with main burner circle of contact forward main burner has arranged the gas recirculation spout in the top, the gas recirculation spout includes four that evenly arrange, four the air -out direction of gas recirculation spout respectively with the main burner circle of contact is reverse tangent. 本实用新型涉及锅炉内烟气再循环技术领域，具体为种燃烧器烟气再循环锅炉结构，其无需加大加高炉膛尺寸即可降低炉膛温度、达到控制结渣生成，降低成本，其包括炉膛，所述炉膛上安装有主燃烧器，所述主燃烧器包括次风接口和二次风接口，所述次风接口和所述二次风接口的出风方向与主燃烧器切圆正向相切，在所述主燃烧器上方布置有烟气再循环喷口，所述烟气再循环喷口包括均匀布置的四个，四个所述烟气再循环喷口的出风方向分别与所述主燃烧器切圆反向相切。