两类换热器回收烟气水分的冷凝除湿效率分析  

Analysis of the Condensation and Dehumidification Efficiency of Flue Gas Moisture Recovery by Using Metal and Non-metal Heat Exchangers

作　　者：吕宏俊 包国江 刘洪鹏[2] 张泽玉 LV Hong-jun;BAO Guo-jiang;LIU Hong-peng;ZHANG Ze-yu(Shenzhen Greenstars Science&Technology Co.,Ltd.,Shenzhen Guangdong 518019;School of Energy and Power Engineering,Northeast Electric Power University,Jilin Jilin 132012,China)

机构地区：[1]深圳市格瑞斯达科技有限公司,广东深圳518109 [2]东北电力大学能源与动力工程学院,吉林吉林132012

出　　处：《中国环保产业》2023年第3期49-54,共6页China Environmental Protection Industry

摘　　要：采用COMSOL仿真软件对流动与传热进行多物理场耦合,通过粒子追踪对失踪粒子的位置进行标记,对316L不锈钢和聚四氟乙烯这两类材质换热器在不同入口烟气流速和冷却水流速下的冷凝除湿效果进行模拟分析。研究表明:烟气流速<6.0m/s时,聚四氟乙烯材质的换热器出口烟气含湿量和冷凝率的变化幅度小于316L不锈钢材质的换热器,前者的冷凝除湿效果明显优于后者,特别是在冷却水流速≥0.6m/s时这种优势更为明显。冷却水流速<0.4m/s时,316L不锈钢换热器出口烟气含湿量下降得较快,聚四氟乙烯换热器出口烟气含湿量则在入口冷却水流速≥0.4m/s时下降得较快,考虑到实际应用中冷却水源及热量回收、建设成本及运行成本,建议将冷却水流速控制在0.4m/s以下。By using the COMSOL simulation software for multi-physical-field coupling of flow and heat transfer,and marking the position of tracer particles with particle tracking,the condensation and dehumidification eficiency of 316L stainless steel and PTFE heat exchangers were simulated numerically under different inlet flue gas flow rates and cooling water flow rates;especially,this advantage was more obvious when the corresponding cooling water flow rate was great than or equal to 0.6m/s.In addition,the moisture content of flue gas from the outlet of 316L stainless steel heat exchanger decreased faster when the cooling water flow rate was less than O.4m/s,while PTFE heat exchanger was on the contrary,i.e.,it showed a faster decrease when the cooling water flow rate was great than or equal to 0.4m/s.Considering cooling water source,heat recovery,and construction and operation costs in practical application,it was suggested that the cooling water flow rate should be controlled below O.4m/s during actual operation.

关 键 词：聚四氟乙烯换热器 烟气水分回收 冷凝除湿效率 含湿量 多物理场耦合 数值模拟 

分 类 号：X701[环境科学与工程—环境工程]