B&W Vølund converts industrial boiler from coal to wood for DuPont in Denmark

Business.conbio.info/2016-08-31/ Food ingredient producer DuPont Nutrition & Health will soon be able to burn wood chips in the old coal boiler at its factory in Grindsted, Denmark. This will be the outcome of a conversion project delivered by B&W Vølund. It will mean not only cleaner energy but also a considerable amount of excess heat for the nearby district heating plant. 

There are significant financial and environmental benefits to be gained from converting a coal boiler to a wood chip boiler. B&W Vølund has undertaken several such conversions, which are particularly attractive because the existing boilers can be retained, which reduces the costs involved. The next project will be for DuPont Nutrition & Health in Grindsted, where the conversion will kill several birds with one stone.

“Green energy is our forte and this is an exciting project which will allow us to use our knowledge and experience to the full,” says Sales Director Niels Christiansen from B&W Vølund.

A cheaper solution with a green profile

Amongst other things, the project involves installing a vibrating grate, adapting the bottom ash and slag system and converting the air system. A complete flue gas condensation system will also be supplied.

“The customer wasn’t keen on having a brand new plant due to the relatively high costs involved. A conversion keeps project costs to a reasonable level and also meets the customer’s requirement for a greener profile. Also, utilisation of the plant will be higher, which will benefit the local community,” says Niels.

Less CO2 and a boost for the local combined heat and power plant

The project has been in the pipeline for a long time: in 2010, DuPont Nutrition & Health were already aware of the challenge facing the old plant with respect to meeting emission requirements. The Government’s 2013/2014 grant scheme made the conversion a serious option financially, and the converted plant is due to be running at full capacity by mid-2017.

Once commissioned, as well as generating steam and electricity for DuPont’s factory, the plant will provide up to 50 per cent of the district heating requirements of the connected Grindsted Combined Heat and Power Plant. The new plant is expected to emit 45,000 tonnes less CO2 than it did previously, which means that DuPont’s factory will be CO2-neutral.

Business.conbio.info/2016-08-31/Lennart Ljungblom