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扬州发电厂4号锅炉系东方锅炉厂制造的DG670/140—8型超高压、自然循环、固态排渣煤粉炉。原设计燃用山西晋东南和河南平顶山混合贫煤,可燃质挥发份为13.8%。燃烧器呈正四角布置.其中一组对角对冲,另一组形成φ736mm的假想切圆。炉膛采用全焊膜式水冷壁。炉膛上方布置全辐射式大屏过热器和半辐射式后屏过热器,水平烟道依次布置高温过热器和高温再热器。后竖井前布置低温再热器和低温过热器。为了提高热风温度,该炉采用二级布置管式空气预热
No.4 boiler of Yangzhou Power Plant is DG670 / 140-8 ultra-high pressure, natural circulation and solid state slagging pulverized coal furnace manufactured by Dongfang Boiler Factory. The original design burning southeast of Shanxi and Henan Pingdingshan mixed lean, combustible volatile matter was 13.8%. Burner was arranged in a positive angle, one of which diagonally hedged and the other formed an imaginary tangent of φ736 mm. Furnace full welded film water wall. Arranged above the hearth full radiant large screen superheater and semi-radiant rear screen superheater, the level of flue followed by arrangement of high temperature superheater and high temperature reheater. After the shaft layout of low temperature reheater and low temperature superheater. In order to increase hot air temperature, the furnace is equipped with two-stage arrangement of air preheating