Investigations on biomass slagging in utility boiler: Criterion numbers and slagging growth mechanisms

The first sticky layer on the boiler tube surface captures coarse ash particles until adhesion force is inadequate; then fine ash particles rich in sticky alkali salts adhere, forming alternating layers of biomass ash.

“The first sticky layer on the boiler tube surface captures more coarse ash particles until the adhesion force is inadequate to capture more coarse ash. Then, fine ash particles rich in sticky alkali salts adhere to the previously formed coarse ash layer. This forms a layer of fine ash particles until the adhesion force is enough to recapture coarse ash particles. Formation of these coarse and fine”

In biomass-fired boilers, alkali chlorides are usually found at the interface of boiler steel and slag deposits.

“In biomass-fired boilers, alkali chlorides are usually found at the interface of boiler steel and slag deposits [10, 13].”

Slag formation mechanisms are associated with an initial sticky layer of slag deposits that promotes further growth on the surface of boiler components.

“Slag formation mechanisms are associated with an initial sticky layer of slag deposits that promotes further growth on the surface of boiler components [10].”