每小时38吨环形加热炉的设计+图纸
毕业论文关键词： 环形加热炉；热平衡；换热器；排风；燃料燃烧
Design of 38t/h Annular Furnace
Abstract: Annular furnace is through the rotation of the furnace bottom, placed on the bottom of the billet material of charging moved to the discharging of a kind of furnace type, the design with the method of side feed side discharge, and adopts the heating burner side. This design for the 16 meters in diameter size in annular furnace, fuel combustion and smoke exhaust system design, including fuel combustion and billet heating time calculation, determine the basic size of the stove, heat balance calculation and determination of fuel consumption, exhaust system, heating furnace is pided into three. This design use natural gas as the main fuel, and the heating furnace using natural smoke exhaust smoke. Because of its high resistance furnace exhaust system, the direct exhaust fume extractor is adopted the form of smoke. In the exhaust system design, mainly for the calculation, the calculation of chimney flue resistance, the calculation of the resistance in the hearth, selection of mixing air cooler, and the selection of range hood, etc.
Keywords: Annular furnace; Thermal equilibrium; Heat exchanger; Exhaust air; Combustion
目录
摘要.Ⅰ
Abstract.Ⅰ
目录.Ⅱ
1设计说明及基本条件1
1.1设计的主要内容..1
1.2设计基本条件1
1.2.1加热钢管尺寸及产量..1
1.2.2钢管坯加热要求.1
1.2.3燃料条件.1
1.3炉型特点..2
1.3.1环形加热炉炉型特点..2
2燃料燃烧计算3
2.1煤气低发热值3
2.2空气需要量.3
2.2.1理论空气需要量.3
2.2.2实际空气需要量.3
2.3燃烧产物系列参数.3
2.3.1理论燃烧产物生成量..3
2.3.2实际燃烧产物生产量及成分..4
2.3.3燃烧产物密度..4
2.4计算燃烧温度5
2.4.1理论燃烧温度..5
2.4.2实际燃烧温度..6
2.5炉钢坯数及出炉间隔6
3综合传热系数计算.7
3.1确定炉膛主要计算尺寸..7
3.1.1确定炉宽.7
3.1.2确定炉高.7
3.1.3各段炉气包围面积9
3.1.4各段炉子空腔体积9
3.1.5计算各段平均有效射线行程..9
3.1.6炉气中CO2和H2O分压.10
3.1.7各段炉气黑度10
3.1.8炉壁对钢坯表面角系数..11
3.1.9炉气、炉壁对钢坯表面的综合辐射传热系数..11
3.2确定环形炉的炉温制度13
3.3计算钢坯加热时间..13
3.3.1预热时间的计算..14
3.3.2加热时间的计算..15
3.3.3均热时间的计算..18
3.3.4总加热时间的计算.18
3.4环形炉各段炉长19
3.5确定环形炉主要尺寸.20
4环形炉热平衡和燃料消耗量的计算.22
4.1炉膛热收入22
4.1.1燃料燃烧化学热22
4.1.2预热空气带入的物理热22
4.1.3预热燃料带入的物理热22
4.1.4雾化用蒸汽带入的热量23
4.1.5金属氧化反应的化学热量..23