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Furnace

Dall Energy Furnace

 

The Dall Energy biomass furnace combines updraft gasification and gas combustion.

Hereby several advantages are achieved: The plant becomes simpler and cheaper, the emissions are reduced and the furnace can regulate between 10-100%.

 

 DE-ovn-2014-ENG-red-txt-72dpi 

 
In the bottom part, the solid fuel is converted into a burnable gas and fine ash. In the top layer, the fuel is dried and pyrolyzed.

The heat for the drying and pyrolysis process is a combination of convective heat from the gasification gases below and radiation heat from the gas combustion part above. 

The gas velocity in the bottom part is very low. Consequently, particles remain here and the dust emission of the furnace is very low. 

 

Gas from the bottom part is combusted in the top section. The gas combustion (flow, temperatures, emissions etc) is very stable.

 

 

 Emission

 Danish Law

 Danish Standard

 Dall Energy

 Dust (mg/Nm3)

 40/100 (in chimney)

 500-1000 out of furnace 

 20-70 out of furnace

 NOx (mg/Nm3)

 300

 200-300

80-160 

 CO (mg/Nm3)
100 % Load
20% Load

10% Load

 
625
625

625

 
0-600

Not possible

Not possible

 

>5

>5

>10

 

Three Dall Energy Furnaces have been installed:

 

2 MW at Warwick Mills USA.

8 MW at Bogense District Heating.

9 MW at Sønderborg District Heating.  Emission test April 2015.

 

The development and implementation of the plants have been financially suppurted by EUDP and markedsmodningsfonden.

 

The project was supported by EUDP 

nyhed_EUDP.jpg

 

Markedsmodning_logo 

 

Main components sønderborg plant.
From left to rigth: Furnace, Boiler, Quench, Scrubber

 

Sønderborg plant