Slagging & Fouling

Slagging and fouling are both related to the accumulation of deposits in a boiler, but they occur in different parts of the system and have different characteristics.

Slagging typically occurs on the furnace walls and is the result of the melting or softening of ash particles due to high temperatures. This molten or sticky ash can then adhere to the walls, forming slag deposits. Slagging can reduce heat transfer efficiency and increase the risk of corrosion.

Fouling, on the other hand, occurs in areas where the flue gas flow velocity is reduced, such as on the heat transfer surfaces of the boiler. It is the accumulation of ash, soot, or other solid particles that can form a layer on the surfaces, reducing heat transfer efficiency and potentially leading to corrosion.

Both slagging and fouling can have negative impacts on boiler performance, efficiency, and maintenance requirements, so it's important for operators to monitor and address these issues to ensure optimal boiler operation.