基于冷却除湿混合技术消除白烟热交换系统的传热性能分析  

Analysis on Heat transfer Performance of White Smoke Reduction Heat Exchange System Based on Cooling Dehumidification and Mixing Process

作　　者：王振环 王珊珊 权宁哲 WANG Zhenhuan;WANG Shanshan;KWON Youngchul(College of Electromechanical Engineering,Binzhou University,Binzhou 256600,Shandong Province,China;Mechanical Engineering,Korea SunMoon University,Asan-si,Chungcheongnam-do 31640,Korea)

机构地区：[1]滨州学院机电工程学院,山东省滨州市256600 [2]韩国鲜文大学机械工学部,韩国天安牙山31640

出　　处：《中国电机工程学报》2023年第16期6348-6354,共7页Proceedings of the CSEE

基　　金：国家自然科学基金项目(52075047);山东省重点研发计划项目(2018GNC112003);博士科研启动基金(2019Y39)。

摘　　要：燃煤电厂湿法脱硫后排出的白烟会造成视觉污染、水分和余热浪费等问题,因此有效治理白烟、推广烟气消白技术具有十分重要的工程意义。以湿法脱硫后形成的白烟污染问题为研究对象对其消除白烟热交换系统进行分析,探究不同工况下对其热交换系统温度、绝对湿度降低和冷却水热回收的影响。基于冷却除湿混合烟气技术方法,在冬季环境条件下对热交换系统进行实验研究,并使用摄像机拍摄混合区出口是否产生白烟。结果发现:当供气引风机和空气-水热交换器同时运行(工况3)时,废气和供气的温度变化最为显著,而且混合区出口温度和绝对湿度大幅度降低,降低约74.1℃和0.0879kg/kg。通过白烟可视化结果,证实白烟的产生机理因工况不同而不同,而且白烟产生量随不同工况的温度和绝对湿度降低而逐渐减少。Severe practical problems including visual pollution,waste of water and heat caused by the white smoke produced by wet desulphurization of coal-fired power plants have remained to be a problem.Hence,it has guiding reference for effectively controlling the white smoke and popularizing the technology of smoke elimination.In this investigation,taking the white smoke pollution caused by wet desulfurization as the research object,the white smoke reduction heat exchange system is analyzed.Special attention is paid to the influence of different operation conditions on the temperature and absolute humidity reduction of the heat exchange system and heat recovery of cooling water.Based on the cooling dehumidification and mixing white smoke process,the heat exchange system is experimentally studied in winter environment.According to results,when the air-water heat exchanger and supply air induced draft fan are running(case 3)at the same time,the temperature changes of exhaust air and supply air are the most significant.The outlet temperature and absolute humidity of the mixing zone decrease by about 74.1℃and 0.0879kg/kg,respectively.Based on above results,it is confirmed that the mechanism of white smoke is consistent with working conditions.The generation of white smoke gradually decreases with decreasing temperature and absolute humidity under different working conditions.

关 键 词：绝对湿度 冷却除湿 热交换器 传热性能 混合 消除白烟 

分 类 号：TK172[动力工程及工程热物理—热能工程]