Narva power plants, Eesti Energia, Estonia, NOx reduction installations 2013–2015

With Fortum’s solution, NOx emissions at Eesti Energia’s Narva Power Plants has been reduced outstandingly – low-NOx emissions (reduction 50%) with extremely small operational costs.


Description of the project

Fortum supplied NOx reduction technology to Eesti Energia, Estonia’s biggest energy company. Fortum’s delivery contained NOx reduction installations for Narva power plants’ four units and for a total of eight power plant boilers. With the new solution, the aim was that the power plant boilers would meet the European Union’s new, strict emissions norms that became effective on 1 January 2016.

Located near the city of Narva, in Eastern Estonia, the Narva power plants (Narva Elektrijaamad) consist of two of the world’s biggest oil shale-fired power plants. Narva power plants produce over 90% of Estonia’s total electricity production.

Fortum’s contribution

  • Modifications 4 units with 8 boilers
  • New OFA system, and wall corrosion protection system
  • Low-NOx combustion system control
  • One boiler with SNCR system, others only with primary method
  • Warranty value for NOx < 200 mg/Nm3, actual daily average < 180 mg/Nm3

Customer benefits

  • Low-NOx reduction with primary method can be achieved 180 mg/Nm3
  • Extremely small operational costs
  • No need for secondary NOx reduction methods


  • Power Plant: Narva oil shale-fired combusting power plants
  • Location: Narva, Estonia
  • Power output: 8 units (320 t/h) each with two boilers and one steam turbine. Each unit has an electric output of 200 MW.
  • Customer: Eesti Energia
  • Project duration: 2013–2015
  • Services: low-NOx system for boiler 3A in year 2013. Satisfied customer used option for deliveries to the remaining 7 boilers during years 2014–2015

"We chose Fortum's nitrogen oxides-reduction solution on the basis of an Europe-wide bidding round. Fortum's competitive strengths were its long-term and broad international experience in combustion technology. With this innovative solution, we can continue energy production at the existing power plants also after the EU's new emissions norms take effect."

Raine Pajo, Member of the Eesti Energia Management Board


Antti Heinolainen
Product Manager, Environmental Performance
Tel: +358 50 45 32137
[email protected]