BSWC selected to convert Fyn Power Station from coal to (bio)gas
Global power plant operation & maintenance (O&M) and technical service provider, Denmark-headed Burmeister & Wain Scandinavian Contractor A/S (BWSC) has revealed that it has recently signed a major contract with compatriot Fjernvarme Fyn for conversion of Unit 7 coal-fired boiler at Fyn Power Station, originally built by Burmeister & Wain Energy, to gas. This unit will act as a peak load plant when power generated from the straw, woodchip, and municipal solid waste (MSW) units is insufficient.
Fjernvarme Fyn is the third largest district heating provider in Denmark, and delivers about 97 percent of the district heat requirement in Odense, providing heat for more than 100 000 households and large greenhouses.
This project is another milestone in Fjernvarme Fyn’s ambition to phase out coal, reduce its carbon footprint, reduce ammonia slip from existing abatement systems, and supply reliable and environmentally friendly district heating and power for consumers.
This unit will act as a peak load station and the limited use also means that the gas firing will only take place 500 – 1 000 hours annually. In the longer term, Fjernvarme Fyn aims to replace natural gas with biomethane (renewable natural gas – RNG).
Ahead of national coal phase-out target
The project is three years ahead compared to the Danish Government target of phasing out coal power plants by 2025. According to Fjernvarme Fyn, this means a total of almost 1 extra million tonnes of carbon dioxide (CO2) saved or approximately 1.5 percent of Denmark’s total target for reducing greenhouse gases (GHGs) by 2030.
The company also notes that for private customers, the change will mean an expected maximum price increase of DKK 25 (≈ EUR 3.36) per month per household. District heating on Fyn “will therefore still be one of Denmark’s cheapest district heating companies compared to other large district heating suppliers.”
Low NOx gas burners
According to BSWC, the project is a “mechanical and electrical contract”, in which BWSC will supply and install 12 new low NOx gas burners, including gas regulating stations, and gas piping from burners to site boundary. It is a two-phase project, where 8 out of the 12 existing coal burners will be replaced with gas burners in 2022 to ensure district heating production with natural gas as a backup fuel.
The remaining 4 burners will be replaced in the second half of 2023 when Fjernvarme Fyn’s current coal in storage has been consumed. The Unit 7 coal-fired boiler was originally built by Burmeister & Wain Energy, now part of BWSC.