Reheating
Electrostatic
precipitator
Flue gas from
Energy
boiler
recovery
(two lines)
NaOH
Upgraded
SO
2
/Adiox
HCl scrubber
scrubber
General:
Måbjergværket municipal waste
incineration plant was obliged to
fulfil the new EU waste directive.
The modification was completed
and the plant handed over to the
client in December
2004. The
upgrade to the old existing
installation has been made mainly to
reduce emissions of:
Dioxin
< 0,09
ng/Nm
3
HCl
< 9
mg/Nm
3
HF
< 0,9
mg/Nm
3
SO
2
< 45
mg/Nm
3
Dust
< 9
mg/Nm
3
Energy recovery by flue gas condensation is integrated into the flue gas cleaning system to generate additional
revenue. The gas flow into the scrubber system is max. 2 x 105 000 Nm
3
.
Description:
Two incineration lines (2 x 9 tons/hour), were each originally equipped with an electrostatic precipitator and a two-
stage “open type” acid (HCl) scrubber.
The contract included modification of existing scrubbers to “tower packing type”, and provision of multistage
tower packing scrubber systems. Also included were exhaust fan systems and flue gas reheating.
The various scrubber stages are all equipped with ADIOX
®
tower packing material for dioxin removal.
Modification of the existing scrubbers has improved the separation not only of hydrochloric acid (HCl) but also of
such components as mercury (Hg). Dioxin removal will also take place in these scrubbers, since ADIOX
®
tower
packing material has been installed.
NaOH will be injected into the new multistage scrubber at the first bottom stage to facilitate efficient SO
2
-separa-
tion. Most of the HF is also separated from the gas.
In the second stage, flue gases are cooled by a circulating cooling water system (indirect district heating water)
enabling a substantial amount of energy to be recovered (nominal output 9 MW
th
, maximum 14 MW
th
).
Lastly, the system has an additional inbuilt ADIOX
®
polishing stage for final dioxin removal.
GÖTAVERKEN MILJÖ AB
Postal address Box 8876, SE-402 72 Göteborg, Sweden
•
Visiting address Anders Carlssons gata 14
Tel +46-31-50 19 60
•
Telefax
+
46-31-22 98 67
www.gmab.se
