基于氟塑料换热器的锅炉余热回收影响研究  

Research on the Influence of Boiler Waste Heat Recovery Based on Fluoroplastic Heat Exchanger

作　　者：吴晓姝[1] WU Xiao-shu(Liaoning Equipment Manufacture College of Vocational and Technology,Shenyang 110161,China)

机构地区：[1]辽宁装备制造职业技术学院,辽宁沈阳110161

出　　处：《塑料科技》2021年第3期56-59,共4页Plastics Science and Technology

摘　　要：采用氟塑料设计了一种U型管换热器结构,通过有限元方法计算了氟塑料换热器换热性能,分析了冷媒水流速对换热器性能的影响。实验结果表明:换热器的等效传热系数可以达到40.168 W/(m^(2)·K)。冷媒水在内管出口的温度比入口处的温度上升了9.045℃,吸收了烟气中的锅炉余热。烟气在外管出口的温度比入口处的温度下降了6.97℃,余热得以散失。此外,氟塑料换热器的冷媒水压降、烟气压降、烟气降低温度和等效传热系数都会随着冷媒水流速的增大而增大,因而氟塑料换热器的性能随着冷媒水的流速增大而提高。A U-tube heat exchanger structure was designed using fluoroplastics.The heat exchange performance of the fluoroplastic heat exchanger was calculated by the finite element method,and the influence of the flow rate of the refrigerant water on the performance of the heat exchanger was analyzed.The experimental results show that the equivalent heat transfer coefficient of the heat exchanger can reach 40.168 W/(m^(2)·K).The temperature of the refrigerant water at the outlet of the inner tube is 9.045℃higher than the temperature at the inlet,absorbing the boiler waste heat in the flue gas.The temperature of the flue gas at the outlet of the outer tube is 6.97℃lower than the temperature at the inlet,and the residual heat is dissipated.In addition,the refrigerant water pressure drop,flue gas pressure drop,flue gas temperature decrease and equivalent heat transfer coefficient of the fluoroplastic heat exchanger will all increase with the increase of the refrigerant water flow rate.Therefore,the performance of the fluoroplastic heat exchanger increases with the increase of the flow rate of the refrigerant water.

关 键 词：氟塑料 换热器 锅炉 余热回收 数值仿真 

分 类 号：TQ325.4[化学工程—合成树脂塑料工业] TK172[动力工程及工程热物理—热能工程]