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 [14e17]. To
large extend, the range of problems and their significance also
depend on boiler particular design and hydrodynamics, as well as
on the composition of fuels particularly the presence of alkali and
chlorine that may form low temperature eutectic mixtures on heat
exchanger surfaces and thus increase the corrosion and tube
damage