Existing scrubber
New scrubbers
and condenser
boosterfan
To stack
District
heating
E-filter
Up-graded
water treatment
New
ADIOX
®
tower packing
installation
Modified installation
and Adiox lamella
droplet separators
General aims:
The municipal waste incinerator at Bodens Energi AB was obliged to meet the flue gas and water
effluent emission requirements as stipulated in the EC waste incineration directive prior to the 28th of
December 2005. In 2004 the water treatment system was modified and in 2005 the flue gas treatment
system was extended. With regard to the gas treatment, the main purpose was to reduce the emissions
of dioxin to values well below 0,1 ng TEQ/Nm
3
by applying the ADIOX
®
technology.
Description:
Prior to the modification the 24 MW
th
waste incineration boiler was equipped with an electrostatic
precipitator, a wet tower packing scrubber, a plate type of flue gas condenser and a combustion air
humidifier. The up-grading took place in two main steps. Firstly, the old tower packing in the existing
scrubber was replaced by a new packing in ADIOX
®
material. The purpose was to make a quick cost
efficient improvement of the dioxin removal capability. Simultaneously, the water treatment system was
also modified in order to reduce emissions of heavy metals and suspended solids.
In the second phase of the up-grading, the humidifier was removed and replaced by a two stage scrubbing
system. The scrubbers are equipped with ADIOX
®
tower packing material as well as ADIOX
®
lamella
droplet separators in order to ensure that the requested dioxin emission limit is met.
The system is designed to reduce the dioxin concentration from maximum 3 ng TEQ/Nm
3
at the outlet of
the electrostatic precipitator to well below 0,1 ng TEQ/Nm
3
in the stack after the flue gas condensation
system.
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
