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1.设计参敷 型式:套管喷流式 换热面积:60m~2 行程:双 内外管径比:0.7 喷流孔布置:不等距梅花点 喷流速度:10m/s左右 管子材质:全部A_3钢 热风温度:≥250℃ 每小时产热风量:10000m~3 安装位置:炉尾上排烟道 2.结构设计 从图1可以清楚地看到,影响喷流换热系数的主要结构参数是h/d和L_d/d。在换热器工作时,从孔洞中喷射出的气流,一方面与热壁面进行热交换后,将沿内外管间的环缝做平行于管壁的运动,另一方面与下面孔洞中喷出的气流成垂直冲击,使喷射气流发生偏移。这种偏移的作用随着管子长度的增加而加剧,结果使喷流换热系数不断减
1. Design Model parameters: casing jet flow heat transfer area: 60m ~ 2 Stroke: double inside and outside diameter ratio: 0.7 jet hole layout: not pitch plum spray speed: 10m / s or so pipe material: all A_3 Steel hot air temperature: ≥250 ℃ Hourly hot air production: 10000m ~ 3 Installation location: Upper tail flue 2. Structure Design It can be clearly seen from Figure 1 that the main structural parameters that affect the heat transfer coefficient of jet are h / d and L_d / d. In the heat exchanger work, the jet from the hole in the air flow, on the one hand and the hot wall after the heat exchange will be along the inner and outer pipe ring seam parallel to the wall movement, on the other hand with the hole below the spray Of the air into a vertical impact, the jet flow offset. The effect of this offset is exacerbated as the length of the tube increases, resulting in a constant reduction of the jet heat transfer coefficient