摘要
2017年全国燃煤锅炉实行超低排放改造以后,由于脱销增上采用SCR脱销工艺,催化剂在加快脱销反应的同时,也提高了三氧化硫的浓度,使露点温度提高;在排烟温度低于露点的情况下,硫酸氢铵凝结在空气预热器末端,造成空气预热器腐蚀和粘结,导致锅炉电耗和煤耗增加。文章以从腐蚀机理、工艺防控措施、空气预热器升级改造以及改造效果,阐述锅炉空气预热器改造的必要和意义。
After the ultra-low emission transformation of coal-fired boilers in China in 2017,due to the increase of off sales,the SCR process was adopted.The catalyst not only accelerated the sell-off reaction,but also increased the concentration of sulfur trioxide and the dew point temperature.When the exhaust gas temperature is lower than the dew point,ammonium bisulfate condenses at the end of the air preheater,resulting in corrosion and adhesion of the air preheater,resulting in the increase of boiler power consumption and coal consumption.This article expounded the necessity and significance of boiler air preheater transformation from corrosion mechanism,process prevention and control measures,upgrading and transformation effect of air preheater.
作者
刘红卫
徐文健
LIU Hong-wei;XU Wen-jian(Anhui Hong Sifang Co.,Ltd.,of CNSIG.,Heifei 231607,China;Qingzhou Xinhui Thermal Energy Technology Co.,Ltd.,Qingzhou 262500,China)
出处
《盐科学与化工》
CAS
2021年第1期34-36,共3页
Journal of Salt Science and Chemical Industry
关键词
空气预热器
硫酸氢铵
腐蚀
消耗
Air preheater
Ammonium bisulfate
Corrosion
Consume
