适合低质煤燃烧的催化助燃剂研究

STUDY ON TYPE OF CATALYST OF SUITABLE FOR LOW-QUALITY COW COMBUSTION

以低质煤为原料,浸渍法制备催化剂,利用综合热分析仪研究了KNO3,DF,DY和DN四种助燃组分对低质煤催化燃烧反应性的影响.结果表明,不同组分及其添加量对低质煤助燃效果不同;由KNO3,DF,DY,DN和十二烷基苯磺酸钠以一定比例组成的复合催化助燃剂(FKYN)可使低质煤煤粉着火点降低12.3℃,最大失重率点温度降低8℃,燃烬温度降低13.1℃,煤灰中含碳量显著降低.催化剂的分散程度对助燃效果有显著影响,以5%煤粉为分散剂时,催化效果最佳.

Being prepared the catalyst by a method of dipping,the effect of KNO3,DF,DY and DN catalyst on the characteristics of low-quality coal combustion was investigated by thermo-gravimetric analysis.The results showed that the low-quality coal has a different combustion characteristics with different components and additve aomount of catalyst.The new catalyst （FKYN） compound of KNO3,DF,DY,DN and sodium dodecyl benzene sulfonate with a certain ratio decreases the ignition point by 12.3 ℃,the maximum weight loss temperature point by 8 ℃,burn-out point by 13.1 ℃.And it decreases carbon content notablely in coal ash.The dispersion of catalyst have a notable effect on combustion supporting.Adding 5 ％ pulverized coal to be a dispersant,the catalytic effect will be perfect.