近几年,在管式加热炉节能改造中,大量采用了钉头管,以强化对流传热,提高总传热系数,从而在对流室空间不变的情况下提高加热炉的热效率。再配以吹灰设施,如Ⅲ型电动固定旋转式吹灰器等,保证了加热炉长周期高热效率运转。如某厂四台圆筒炉改造时全部或大部分更换成钉头管,并安装了数台吹灰器,自1979年8月开车至今热效率一直保持在85％以上。 In recent years, energy-saving retrofit tube furnace, the extensive use of nail tubes to enhance the convective heat transfer, increase the overall heat transfer coefficient, so as to keep the flow chamber space unchanged heating efficiency of the furnace. Together with the soot blowing facilities, such as the type Ⅲ electric rotary sootblowers and other fixed, to ensure that the heating furnace long period of high thermal efficiency operation. For example, when a factory rebuilds all four cylindrical furnaces, all or most of them are replaced with nail tubes and several sootblowers are installed. Since it was started in August 1979, its thermal efficiency has been maintained at over 85%.