防腐表面特性对烟气凝结换热影响的实验研究  

Experimental Study on the Anticorrosion Surface Characteristics Effect on Flue Gas Condensation Heat Transfer

作　　者：穆连波[1] 王随林[1] 葛海霞[1] 严欢[1] 罗雪莹[1] 

机构地区：[1]北京建筑工程学院,北京100044

出　　处：《建筑节能》2010年第12期63-65,80,共4页BUILDING ENERGY EFFICIENCY

基　　金：北京市自然科学基金重点(B)项目/北京市教育委员会重点科研项目(KZ200810016006)资助;北京市教育委员会科技成果转化-中小燃气锅炉防腐紧凑型烟气冷凝热能回收器研发(2009)资助

摘　　要：天然气热能动力设备烟气热回收利用关键技术之一是设备的防腐,不同防腐表面不仅其耐腐蚀性能不同,且换热性能也不同,防腐表面上气-固-液接触角是影响凝结换热强弱的重要因素。采用躺滴法借助Phoenix 300接触角分析仪,测试出不同防腐表面接触角,分析了接触角滞后性对凝结换热的影响。研究结果表明:所需镀层不仅耐腐蚀性能相对最好,且凝结换热性能最好,改变材料表面特性不仅增强了耐腐蚀性,同时可以强化传热。The anticorrosion is one of the key technologies on flue gas heat recovery using on natural gas thermal power equipment,the different anticorrosion surfaces not only have different corrosion resistance but also have different heat transfer performance.Gas-solid-liquid contact angle of anticorrosion surface is the important influence factor of condensation heat transfer.The sessile drop method and Phoenix 300 contact angle analyzer are used to test the contact angle of different coating surfaces,analyzing the contact angle hysteresis＇s effect on the condensation heat transfer.The results showed that the needed corrosion resistance coating is relatively best and the condensation heat transfer performance is best,changing the surface characteristics of materials not only enhances the corrosion resistance,but also enhances heat transfer.

关 键 词：天然气 烟气冷凝 防腐表面 接触角 强化传热 

分 类 号：TU833[建筑科学—供热、供燃气、通风及空调工程]