ENVIRONMENTAL SYSTEMS

• Koja as a reliable partner for Energy-from-Waste process plant

  Koja delivers two flue gas induced draft fans to an energy recovery facility to Northern England with an annual treatment capacity of 400,000 tonnes. The facility will generate up to 49 MW of electricity. The plant is scheduled to be in commercial operation at the beginning of 2024. Koja’s fans will be installed in conjunction with the plant’s flue gas cleaning system.

  Flue gas fan

  • Design data: 76 m³/s per fan; at 6721 Pa
  • Fan power: 587 kW
  • Operational: 2024

ENERGY

• Koja on home turf

  Koja delivers combustion air and flue gas fans for Tampere’s main power plant renewal. The new facility will generate total power of 210 MW to the grid and heat for district heating. The fuel sources are from 100% biomass, which will significantly reduce CO2 and other flue gas emissions.
  Plant operational: 2023

  Combustion air fans

  • Design data: 45/48 m³/s per fan; at 9 100/16 200 Pa
  • Fan power: 470/902 kW

  
  Flue gas recirculation fan

  • Design data: 11 m³/s per fan; at 16 300 Pa
  • Fan power: 245 kW

  
  Flue gas fan

  • Design data: 186 m³/s per fan; at 13 200 Pa
  • Fan power: 2 952 kW
• Going strong in Japan

  Koja has delivered fans to several biomass-powered plants in Japan. The newest addition is a 112 MWe boiler, where Koja is showcasing its long experience of fans in biomass-fired systems.

  Plant operational: 2025

  Primary air fan

  • Design data: 84 m³/s; at 20,500 Pa
  • Fan power: 1950 kW

  
  Secondary air fan

  • Design data: 57 m³/s; at 11,600 Pa
  • Fan power: 760 kW

  
  Flue gas fan

  • Design data: 235 m3/s; at 9,600 Pa
  • Fan power: 2 830 kW

PULP, PAPER & CARDBOARD

• Expertise in pulp drying

  Koja has delivered dryer fans for fiber flash drying to a pulp mill in Sweden. Koja has developed a special fan design for this highly demanding application, where the impeller design and surface quality are crucial to the process.

  Flash dryer fans

  • Design data: 79 m³/s per fan; at 6,000 Pa
  • Fan power: 818 kW
  • Operational: 2023
• Fans for bioproduct mill

  Koja won an award for an extensive package of fans for a newly built bioproduct mill in Northern Finland. The fans are intended for several applications: Fiber Line, Evaporation, Biomass Dryer, Recovery Boiler, Lime Kiln and Gasifier.

  Numerous fans

  • Operational: 2023

METALS & MINING

• Steel production

  Koja has delivered a high-pressure induced draft fan to a steel mill in Sweden, where it replaced an outdated fan. The application is very demanding, requiring an impeller made of high strength steel. The fan has a center-hung arrangement with a gas-tight construction.

  High pressure ID fan

  • Design data: 65 m³/s per fan; at 26,000 Pa
  • Fan power: 1,990 kW
  • Operational: 2020