四墙切圆布置燃烧器炉内实际切圆大小的试验研究

Experimental Research on the Actual Diameter of a Tangential Circle in a Tangential-fired Boiler Furnace

在1MW实验台上分别对四墙切圆燃烧方式炉内冷态、热态实际切圆直径进行了测量,热态试验结果显示燃烧宜宾无烟煤时,一次风截面热态切圆直径为假想切圆直径的3倍;燃烧神木烟煤时,相同截面热态切圆直径为假想切圆直径的7.7倍,数据分析预示:冷态下沿炉膛高度切圆直径呈线性增大,热态下沿炉膛高度切圆直径呈波浪形增大。

On a 1 MW test rig measurements were taken of the actual tangential circle diameter of a tangential fired furnace respectively under cold state and hot state test conditions. The hot state test results indicate that in case of firing Yibin anthracite the tangential circle diameter at a primary air section under a hot state test condition is three times that of the supposed diameter. When Shenmu bituminous coal was fired the tangential circle diameter of the primary air section under a hot state test condition is 7.7 times that of the supposed diameter. The analysis of the test data allows one to predict that under cold state test conditions the tangential circle diameter along the furnace height assumes a linear increase, and under hot state test conditions the same diameter undergoes a wave-like increase.