Fluidized Bed Combustion of Coal, Renewable Fuels, and Waste: Current Status and Developments - Novel Combustion Concepts for Sustainable Energy Development - page 234

Fig. 7 The concept of
chemical-looping combustion
(CLC) is based on the
application of fluidized bed
technology (Penthor et al.
2014 )

5 Conclusions

It can be seen that the fluidized bed technology is a very useful technology which

has been applied in a wide range of power generation applications. Fuels as dif-
ferent as coals, biomass, sludges, and waste with different qualities can be utilized
well in

fl

fluidized beds.
Scale-up has been continued and recently successfully demonstrated in the 600
MWe size range. High ef

fl

ciencies can be achieved using supercritical and ultra-
supercritical steam conditions in large-scale CFB boilers. Those units are based on
coal.
Biomass is utilized using fl fluidized bed technology as well. Biomass can be

added to large-scale fluidized bed boilers; however, biomass is typically utilized in

smaller scale. Those biomass combustors operate usually in a size range from about
30 to about 130 MWth. On the other hand, there are a few large-scale biomass-
based FBC in operation. The world

fl

is largest at present is the Polaniec CFB boiler in
Poland with a capacity of 447 MWth.
The

'

fluidized bed technology is very suitable to utilize wastes, for example,
assorted MSW, RDF, and even plastics. Typically, the FBCs are in a smaller size
range, which extend from 40 to 140 MWth, similar to those FBCs which are based
on biomass utilization.
Novel concepts and successful demonstrations using

fl

fluidized bed technology
are already on the market or under development, for example, the steam gasi

fl

cation
of biomass wherein the syngas produced is rich in H 2 and CO which can be used for
synthesis or in gas engines or oxyfuel combustion which produces a CO 2 -rich fl ue

gas which signi cantly helps in CO 2 removal or in chemical-looping combustion

(CLC).