ADIOX
®
tower
packing
Flue gas to stack
Hot
District
Flue gas
from boiler
water
heating
Lime silo
Bag house
filter
Scrubber
Absorption
heat pump
General aims:
The Hedenverket municipal waste incineration plant in
Karlstad, Sweden, has been upgraded to fulfil the new EU
waste incineration directive on emission limits. Another im-
portant feature enabling investment to be recouped in just a
few years, is energy recovery by gas condensation, compri-
sing a scrubber condensing stage and an absorption heat
pump.
Description:
The 17 MW
th
waste incineration boiler plant had only a (fabric) bag
house filter with prior additive injection for acid removal. The
efficiency of the filter dictated additional cleaning systems and after
considering various solutions, the client, Karlstad Energi AB, decided to
install a scrubber-based system from Götaverken Miljö AB.
The cleaning requirement included reduced emissions of HCl, SO
2
, HF,
NH
3
plus heavy metals.
From the bag house filter, the gas enters the lower section of the
scrubber, which is designed as an open-type Ca(OH)
2
scrubber section.
Most of the cleaning takes place here. The second stage consists of
condensation tower packing with the
ADIOX
®
material, providing
additional dioxin capture.
This condensation system recovers energy from flue gas through an
absorption heat pump system. Up to 5 MW of heating power can be
recovered. The second section also serves as a final polishing stage to
meet final limits.
GÖTAVERKEN MILJÖ AB
Postal address Box 8876, SE-402 72 Göteborg, Sweden
•
Visiting address Anders Carlssons gata 14
Tel +46-31-50 19 60
•
Fax
+
46-31-22 98 67
www.gmab.se
