ENERGY PROJECTS
Translation by Götaverken Miljö AB
Same volume of fuel produces more
heat
After a few months of alignment
connected in between the bag filter
and the stack.
work, Karlstads Energi has now
The upgrade mainly consists of:
started a pilot operation of its new
- A two-stage scrubber, where the
flue
gas cleaning plant at
first stage cleans the flue gases.
Hedenverket.
- The water cleaning, which cleans
The entire project has gone very
the condensate before its emission.
well and should continue to do so
- The absorption heat pump, which
until we take over the plant, says
extracts extra energy for the district
Willy Krönström.
heating network.
And the result
- cleaner waste
These components ensure two
major advantages for the produc-
products and better utilisation of
tion of district heating in Karlstad.
the incinerated waste.
The first, and this is the main
reason why the conversion was
n January the expanded flue
carried out, is a reduction in the
gas cleaning plant was finally
emission of environmentally hazar-
I
connected to the number one
dous flue gases from the incine-
boiler at Hedenverket in Karlstad.
ration. This means lower emissions
The expansion of Hedenverket has meant the erection of a completely new building.
This is a waste boiler and the fuel
of hydrogen chloride and sulphur
comes mainly from the household
oxides, plus an increased separation
waste of several municipalities
of heavy metals. The timing was
Willy Krönström.
watt an hour there will now be 21
around Karlstad. At the present
well chosen and it will now be
to 22. This increase corresponds to
time the boiler produces 17 mega-
possible to meet, under controlled
Positive surprise
the consumption of about
700
watts of heat every hour for
conditions and by a good margin,
The condensation produces from 4
normal sized houses, without an
Karlstad’s district heating network.
the more stringent EU regulations
to 5 megawatts per hour. Karlstads
increase in the production costs.
that will be introduced in December
Energi expected to be able to
- We are extracting about
25
Major advantages
2005.
achieve 30 gigawatt hours a year,
percent more energy now, without
The flue gas cleaning in the boiler
But thanks to the new absorption
but during the alignment the ab-
having to put anything in, confirms
at Hedenverket has previously
heat pump, it will also be possible
sorption heat pump has proved to
a pleased Willy Krönström.
consisted of a reactor, bag filter and
to achieve a significant degree of
be a positive surprise and Willy
SNCR plant. The expansion
energy recovery.
Krönström now believes that the
Three stages
involves the erection of a comple-
- The results have surpassed our
figure will be
31 or 32 gigawatt
The adjustments to the new, more
tely new building to contain the
expectations, says an enthusiastic
hours a year. Instead of 17 mega-
severe EU requirements take place
new components, which have been
in three stages. The first was to
rebuild the waste boiler, which was
completed in the autumn of 2003.
The grating was replaced and the
boiler was extended to accommo-
date it.
It was also necessary to achieve a
temperature in the boiler of at least
850º C and to achieve this, in those
cases where the temperature cannot
be maintained only on the basis of
the incineration, a backup oil
burner was installed. These two
Götaverken Miljö AB’s ADIOX system,
tower packing material with carbon as
an extra dioxin barrier, integrated in the
Lifting the absorption heat pump, with the help of which it will be possible to extract extra energy for the district heating network.
scrubber system.
NORDISK ENERGI - 3/2004
