PBT热媒炉低氮燃烧及效率提升改造

Low nitrogen combustion and efficiency improvement transformation of PBT heat medium furnace

随着国家对化工行业氮氧化物排放限制的不断提高,PBT装置某热媒炉需要大量的烟气再循环才能保证NOx含量在100 mg/m3以下,排烟温度较高,不能满足锅炉大气污染物排放标准(DB32/4385—2022)最新要求。通过实施超低氮技术改造,烟气中NOx含量降低至50 mg/m3以下,降低了排烟温度,提升了热媒炉热效率,为同类装置低氮改造提供借鉴经验。

With the continuous increase of national restrictions on nitrogen oxide emissions in the chemical industry,a certain heat medium boiler in the PBT plant requires a large amount of flue gas recirculation to ensure that the NO,content is below 100 mg/m²,and the exhaust temperature is high,which cannot meet the latest requirements of the boiler air pollutant emission standard(DB32/4385—2022).By implementing ultra-low nitrogen technology transformation,the NO,content in the flue gas has been reduced to below 50 mg/m^(3),reducing the exhaust temperature and improving the thermal efficiency of the heat medium furnace,providing reference experience for similar low nitrogen transformation devices.