Attention should be paid to the corrosive damage caused by flue gas to moving equipment
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Corrosion has caused many problems and losses to human development. The image above shows the flue fan of the industrial heating furnace in my company; it is used to extract the exhaust gases from the furnace and discharge them into the atmosphere. The temperature of these exhaust gases is around 120 degrees. The shell of the flue gas is made of carbon steel, 15 millimeters thick. The impeller thickness is 8 millimeters. This exhaust fan lacks corrosion protection; after being in use for nearly two years, it has corroded to the state shown in the image below, and can only be scrapped, resulting in significant losses.
Attention must be paid to the corrosive effect of flue gas on moving equipment, and appropriate protective measures should be taken to minimize losses. .
There might have been problems from the design stage onward; why not choose a smoke extractor made of stainless steel? For reference.
It is necessary to test the dew point temperature of the exhaust gas to determine whether the exhaust fan is operating at that temperature; raising the exhaust temperature appropriately can help reduce corrosion.