To avoid jam, expansion bin and automatic-control blowing system and necessary compressed air devices will be adopted to guarantee normal running of pre-heater.

• 为防止预热器系统结皮堵塞，除在旋风筒下设有膨胀仓外，还配有独特的自动控制喷吹系统以及必要的空气炮，保证预热器系统的正常运行。