烟气冷凝器换热特性实验研究  

Experimental Study on Heat Transfer Characteristics of Flue Gas Condenser

作　　者：王剑飞[1] 宋冠强 赵贯甲 WANG Jianfei;SONG Guanqiang;ZHAO Guanjia(Taiyuan Boiler Group Co.,Ltd.,Taiyuan 033008,China;College of Electrical and Power Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原锅炉集团有限公司,山西太原033008 [2]太原理工大学电气与动力工程学院,山西太原030024

出　　处：《锅炉技术》2023年第1期9-14,共6页Boiler Technology

基　　金：山西省自然科学基金(201901D211048);山西省重大专项(202001101014)。

摘　　要：天然气燃烧产生的烟气中含有大量的水蒸气,回收烟气中的余热可以提高天然气的热利用率。为了研究烟气冷凝器在变工况下的对流冷凝换热特性,采用湿空气模拟天然气燃烧产生的烟气,实验研究了不同水蒸气含量、冷却水进口温度和流量、湿空气进口温度和流量对冷凝器凝结水率、平均对流换热系数以及沿程温度的影响,并根据实验数据拟合了对流冷凝传热的准则关联式。结果表明:烟气进口的相对湿度和冷却水的进口温度对烟气冷凝器对流冷凝换热特性的影响最大;拟合的传热关联式与实验的误差在20%以内,为天然气烟气冷凝器的设计提供了依据。The flue gas produced by the combustion of natural gas contains a large amount of water vapor, and recovering the waste heat in the flue gas can improve the heat utilization rate of natural gas. In order to study the convective condensation heat transfer characteristics of the flue gas condenser under variable working conditions, wet air was used to simulate the flue gas generated by natural gas combustion. The effects of different water vapor contents, the cooling water inlet temperature and flow rate, the wet air inlet temperature and flow rate on the condensate water rate, the average convective heat transfer coefficient and the temperatures along the path of the condenser were studied by experimental methods.Then according to the experimental data, the correlation equation for convection condensation heat transfer is fitted. The results show that the inlet relative humidity of the flue gas and the inlet temperature of the cooling water have the greatest influence on the convective condensation heat transfer characteristics of the flue gas condenser. The error between the fitted heat transfer correlation and the experiment is within 20%, which provides a basis for the design of the natural gas flue gas condenser.

关 键 词：天然气 烟气余热 热利用率 相对湿度 准则关联式 

分 类 号：TK124[动力工程及工程热物理—工程热物理]