The results of authors' investigation carried out at a large-scale
CFB boiler clearly indicated the effect of fuel type on solids accumulation
on the surfaces of test tube probes made of P91 steel and
located in the boiler convective section in the vicinity of final steam
superheater. Analysis of the data indicated that the parameters of
biomass might differ significantly depending on biomass origin,
processing technology, etc., and that the deposit thickness was very
much affected by the biomass type.
The test results also indicated that the location of the area on
steel tube samples significantly affected the rate and composition
of the accumulated solids. The calculated average solids accumulation
rates for the rear areas of the samples were significantly
higher than those for the front ones.