FLUE GAS CLEANING AND ENERGY
RECOVERY AT UMEÅ, SWEDEN
Dåvamyran Project
Projekt Dåvamyran
Umeå Energi AB has built a totally new heating and power plant
Umeå Energi AB har byggt ett helt nytt avfalls- och biobränsleeldat
to incinerate waste and bio-fuel, at Dåvamyran, approximately 15 km
kraftvärmeverk vid Dåvamyran, cirka 15 km nordost om Umeå.
north-east of Umeå in northern Sweden.
Idrifttagning skedde under våren 2000.
The operation commenced in the spring of 2000.
Anläggningen har byggts för att uppfylla EUs framtida,
The plant is designed to fulfil the future stringent EU environmental
stränga miljökrav och är sannolikt den mest energieffektiva
requirements and it is probably the most efficient plant in the world of its
avfallsförbränningsanläggningen i världen.
kind in regard to extensive energy recovery.
Götaverken Miljö AB levererar
Götaverken Miljö AB supplied the flue gas cleaning plant plus gas
rökgasrening, kondensering, turbinaggregat och värmepumpar.
condensation system, the heat pump facility and the turbine set.
PLANT DESIGN DATA
Supplier:
Consortium between
Götaverken Miljö / Von Roll
Furnace type:
Water-cooled grate type
for waste and bio-fuel
Boiler output:
55 MW heat for district heating
Flue gas cleaning:
Designed and supplied by: Götaverken Miljö AB
Process:
Bag house filter, acid
scrubber, SO
2
-scrubber and
water treatment
Energy recovery:
Atmospheric emission limits (24-hour average)
Designed and supplied by: Götaverken Miljö AB
Dust
5
mg/Nm³
Process:
Flue gas condenser, heat
HCl
5
-”-
pumps and back pressure
HF
1
-”-
steam turbine & condenser
SO
x
25
-”-
Output, MW:
Flue gas condenser
11
NH
3
5
-”-
Heat pumps
2 x 5.7
Cd + Tl
0.05
-”-
Turbine (electricity)
15
Hg
0.03
-”-
Turbine condenser
40
Dioxin
0.1
ng/Nm³
Plant description
The plant incinerates 175,000 tons of municipal waste yearly (20 tons/hour). Simultaneous incineration of bio-fuel is
also possible.
As a result of Götaverken Miljö’s extensive energy recovery system, the thermal efficiency of the incineration plant is
100% or more! The technique is based on the fact that latent heat in flue gas, chiefly in water vapour, is recovered in a
condenser connected to a heating pump system. This energy is then transferred into the district heating system of
Umeå city. By definition, the energy in the water vapour is not included in calculating the efficient heating value of a
fuel, and thus efficiency levels of over 100% can be obtained when recovering this energy!
The Umeå district heating system delivers approximately 750 GWh/year. Dåva heating and power plant has a total
heat production of 350 GWh/year, of which 20% originates from the flue gas condenser. In addition, approximately 80
GWh/year of electricity is produced.
The flue gas cleaning takes place in a fabric filter followed by an acid scrubber, an SO
2
-scrubber, and a gas condenser.
Water is also recovered from the gas. Thus, the cleaning process is self-sufficient in regard to water.
Boiler
SO
2
-
Flue gas fan
Bag filter
Acid scrubber
Condenser
scrubber
(Reheater)
Furnace/
SNCR
NH
3
-
Heat pumps
recovery
Water
Recipient
District
treatment
heating
Turbine
Condensor
Sludge and fly-ash
treatment
Boiler
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
