鳍片管受热面的应用与积灰清除

Application of Finned Heating Surface and Fouling Ash Removing

扩展受热面强化传热技术在锅炉改造中应用广泛,通过鳍片管、肋片管等可以提高受热面吸热量,降低排烟温度。但是,由于鳍片管等扩展受热面的结构特点,一旦发生积灰,不仅起不到强化传热的作用,而且会导致清灰困难,运行经济性和可靠性急剧下降。在众多型式的吹灰器中,冲击波吹灰器是可靠有效的选择。针对某220 t/h锅炉高温省煤器的鳍片管改造,分析了受热面改造前后及积灰后对锅炉的运行状况,介绍了冲击波清灰技术及其在螺旋鳍片管省煤器上的应用情况。通过采用冲击波清灰技术,增加了受热面吸热,提高了锅炉热效率。扩展受热面强化传热技术和冲击波清灰技术联合应用是锅炉改造的优化选择。

Finned heating surface is more and more used in boiler retrofit to promote heat exchange and thus to enhance the efficiency of the boiler. As for the constructive characteristics, it is very difficult to remove the foul ash from the finned heating surface. When ash fouling became serious, the finned heating surface would be more troublesome and the operation situation of the boiler would be worse and worse. The shock wave ash removing technique is an effective method among all ash-blowers. The use of shock wave ash-blower shows prosperous in ash removing, especially in the case of finned heating surface. The combined application of finned heating surface and shock wave ash removing technique is a very good choice in boiler retrofit.