The deposits are in many cases considered to be brought about by
biomass ash alkali and are often responsible for boiler
emergency shutdown, decrease of the heat transfer rate, or damage
of heat transfer elements and shortening of their lifetimes.
There are numerous reasons responsible for solids accumulation
and formation of deposits on heat transfer surfaces. However, due
to high flue gas temperature, the majority of operational ashrelated
problems usually occur on superheater tubes