2. The combustion of biomass on an integrated grate under
the suspension burner seems to be a well-suitable
concept. The flue gas of the biomass combustion rises
directly into the combustion chamber of the suspension
burner. Usually, a retrofitting of existing suspension
burners is not possible because of the lack of space.
This concept is realized on a technical scale in the
power station at St. Andrae, Austria (124 MWe) fired
with bituminous coal. In 1994, the power station was
retrofitted and an integrated grate was installed. The
bark-fired (16 m3/h) grate has a thermal power of 2 £
5 MW. Both the operation and the emissions are not
negatively affected by the integrated grate.