Why is there slag hanging on the furnace wall in the furnace, and coking and ash accumulation in the smoke pipe?

28 Feb, 2022

　　1. The boiler load is high and the furnace temperature is too high. It is necessary to keep the boiler running under the rated output, and the furnace temperature should be controlled between 950-1000 °C.

　　2. Fuel ash melting point is too low, try to choose fuel with higher ash melting point, such as wood fuel. For fuels with a low ash melting point such as plant straws, it is possible to consider installing a flue gas recirculation system to control the combustion temperature.

　　3. The secondary air distribution is insufficient. In addition to ensuring the fuel is fully burned, the secondary air distribution can also adjust the furnace temperature.