超细化煤粉的投入量对再燃效果影响的实验研究

Experimental Study of the Influence of Ultra-fine Pulverized-coal Feeding Rate on Reburning Effectiveness

目前我国燃煤电厂NOx排放的控制任务相当艰巨和繁重,急需开发适合我国国情的降低NOx排放的技术。超细化煤粉再燃是一种降低燃煤锅炉NOx排放的技术,本文通过在热态燃烧试验装置上进行的试验研究,论述了超细化煤粉的投入量对锅炉NOx排放、结渣状况及机械不完全燃烧损失的影响。通过试验得知,加入再燃煤粉后,炉膛火焰中心的位置变化不大;NOx的脱除率能够达到50%以上;结渣状况有所减轻;机械不完全燃烧损失增加。

Owing to the formidable and arduous task of restricting NOx emissions from coalfired power plants currently operating in China it is extremely urgent to develop low NOx emission technologies suitable for China-specific conditions.The reburning of ultra-fine pulverized coal represents a low NOx emission technology for coal-fired boilers.Through an experimental investigation conducted on a hotstate combustion test facility clarified and expounded was the influence of the feeding rate of ultra-fine pulverized coal on boiler NOx emissions,slag formation conditions and mechanical incomplete combustion losses.From the tests it has been found that after feeding pulverized coal for reburning there was little change in the location of the furnace flame center and the removal rate of NOx can be in excess of 50%.Meanwhile,slag-formation conditions have somewhat improved along with an increase in mechanical incomplete combustion losses.