【作者】 李科群； 罗行； 马虎根； 周超；

【Author】 LI Ke-qun, LUO Xing, Ma Hu-gen, Zhou Chao (University of Shanghai for Science & Technology, College of Power Engineering, Shanghai 200093)

【机构】 上海理工大学动力工程学院；

【摘要】 热管式空气预热器广泛应用于烟气的余热回收。在设计过程中,各排热管的壁面温度必须高于烟气的露点温度,以防止壁面被腐蚀。如果某排热管壁温低于烟气的露点温度,则需调整该排热管的几何参数以提高壁温至露点温度以上。提出并采用冷、热流体温度连续分布模型,导出了热管换热器换热量的表达式,并应用其对热管式空气预热器进行了调壁温设计。温度连续分布模型比已有的离散模型更为合理。利用连续分布模型给出了一个热管预热器调壁温设计实例,结果表明,该设计方法行之有效。更多还原

【Abstract】 The heat pipe air preheaters are widely used in the recovery of waste heat of gas. In the design, the wall temperature of each row of heat pipes should be higher than the dew point temperature of gas, if not, the geometric parameters of this row must be adjusted to raise the wall temperature. The heat transfer load of the exchanger is deduced by using the continuous temperature distribution model of the hot and cold streams, the model is applied for the adjusting wall temperature design and is reasonable than the existing discrete distribution model. A case study is given,which shows the method is valid for the corrosion-resistant design of air preheaters.更多还原