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随着锅炉机组向高参数大容量发展,炉膛燃烧器附近高热负荷区管内水的沸腾传热是否良好,这是一个直接影响锅炉能否安全运行的重要问题。由于沿炉膛高度与宽度方向热力分布不均匀性,故蒸发受热面管的单位面积热负荷值qH=(B_pQ_m)/(H_A)在炉膛内分布是很不均匀的。煤粉炉中q_Hmax/q_Hmin=1.8～2.5,油炉则高达q_Hmax/q_Hmin=3～5,且最大值可达(0.5～0.6)×10~6大卡/米~2时。这
With the development of large capacity of boiler units towards high parameters, the boiling heat transfer of water in the high heat load zone near the burner of the furnace is good, which is an important issue that directly affects the safe operation of the boiler. Due to the non-uniformity of thermal distribution along the height and width of the furnace, the heat load per unit area (qH = (B_pQ_m) / (H_A)) of the evaporating faceplate is very uneven in the furnace. Pulverized coal furnace q_Hmax / q_Hmin = 1.8 ~ 2.5, while the oil furnace is up to q_Hmax / q_Hmin = 3 ~ 5, and the maximum up to (0.5 ~ 0.6) × 10 ~ 6 kcal / m ~ 2:00. This