【作者】 缪劲松； 刘纪元； 吴晓丽； 惠和兴；

【Author】 MIAO Jin-song, Xiu Jiy-yun, WU Xiao-li, HUI He-xing (Beijing Institute of Technology, Beijing 100081, China)

【机构】 北京理工大学；

【摘要】 随着高温烟气驱动气体涡轮机的发展及在高效燃煤电厂中的应用,对脱除高温烟气中的粉尘及有害气体提出了很高的要求.其中脱除气态的钠、钾对保护气体涡轮机免受腐蚀有重要意义.本文主要介绍了静电场对在1 200℃以上去除钠蒸气的影响的实验研究的结果.高温下钠以离子的形式存在,其在电场作用下向阴极作漂移运动并与阴极上的硅铝氧化物反应而被脱除.电场的存在能加速钠离子的漂移速率,从而改善其脱除的反应动力学,达到脱除增效的目的.更多还原

【Abstract】 Higher requirements have been put forward for the removal of ash and poisonous gases in high - temperature flue gases in pace with the development of gas turbine driven by high - temperature flue gas and its application in high - efficiency power plant. It is of great significance for protection of gas turbine from corrosion to remove sodium and potassium of gas phase in flue gases. This article introduces the experimental results of the influence of static electric field on the removal of sodium vapor above 1200℃. Sodium exists as ion at high temperature and can be removed by reacting with silicon - aluminum oxide on cathode as drifting toward cathode under electric field. The existence of electric field can speed up the drifting velocity of sodium ion and improve the reaction dynamics to achieve the goal of increasing removal efficiency.更多还原