Gas side:
Erosion may occur in case the flue gas contains fly ash and erosion is particularly severe if:
• Fly ash content in flue gas is high
• Content of silica in fly ash is high
• High mean of particle size in flue gas
• High flue gas velocity
• Inappropriate design of the flue gas duct system
The “gas side“ erosion will typically take place on the gas disperser vanes, and other areas where raised flue gas velocity appears.