China Power Plant Boiler Exchange Heat Energy Air Preheater

What to do if the air preheater is blocked by dust
Another common problem with air preheaters is ash blocking. When the air preheater is working, it will come into contact with the flue gas discharged from the boiler and the particulate dust carried in it. If the dust accumulates for a long time, it will form a blockage. At the same time, the air preheater may corrode when the SO2 gas carried in the flue gas is discharged from the basic boiler, and the corroded material will also form the ash blockage of the air preheater.
The method of air preheater to prevent ash blocking is to install a heater at the air inlet or use hot air recirculation, and use low-oxygen combustion and add additives to reduce the generation of SO2 gas in the flue gas. In addition, the regular soot blowing of the air preheater also plays a great role in keeping the air preheater clean.