At the bottom of the chamber stands the air distributor
plate and its caps connected to the air box. The
primary air (PA) from the compressor was introduced
through the air distributor and acted as both fluidization
and combustion air. Three layers of nozzles at the
heights of 0.65, 0.85 and 1.1 m above the air distributor
are placed symmetrically with four nozzles at each layer
and having the injection direction tangential. Each layer
has a control valve to adjust airflow rate to fit the experimental
needs. The secondary air (SA) or swirling air
was introduced into the chamber through these nozzles,
which made the inside air and waste materials swirl. The
waste was fed to the combustor at the location of 0.3 m
above the air distributor plate. The natural gas (NG)
was fed at the heights of 0.12 and 0.5 m above the air
distributor plate. A cyclone is fitted to the exit of the
combustor and two heat exchangers are allocated at
the upper- and down-stream of the cyclone. The flue
gas was purified in the filter bag before exiting to the
gas pool