由于一般锅炉的炉管或省煤器管的管束间隔很小,因此在锅炉检修时,常常不能用人工方法来彻底清除炉管外壁的积灰。最近,杨树浦发电厂试验了两种比较简单的消除管壁积灰的方法都得到很好的效果。第一种方法是喷雾法。当锅炉停炉检修时,趁炉内用热水泵水的机会,将室温下的冷水用喷嘴(参阅附图)喷射至炉管外壁。由于炉管内外壁温度的不同而使灰垢脱落。此时只要从炉管间将灰垢扫出即可。采用这种方法时,管壁内外的温度差,不宜过大。过 Because the boiler tube or economizer tube bundle of general boiler tube spacing is very small, so the boiler repair, often can not manually remove the fouling of the outer wall of the furnace tube. Recently, Yangshupu Power Plant has experimented with two relatively simple methods to eliminate wall fouling. The first method is the spray method. When the boiler shutdown maintenance, while taking advantage of the opportunity to use hot water pump furnace, cold water at room temperature using the nozzle (see photo) to the furnace wall. As a result of the different temperature inside and outside the furnace wall ash off. At this point as long as the ash from the furnace tube can be swept out. When using this method, the temperature difference between the inside and outside of the tube wall should not be too large. Too