Unicon Biograte

Unicon Biograte boiler plants utilize local fuels
Unicon Biograte boiler plant is a plant for steam and hot water production with biomass. By placing several plants side by side, the capacity the customer requires can be reached. The solutions are based on Biograte combustion technology.
Our solutions:
  • hot water boiler plants for the production of district heat
  • hot water boiler plants for industrial needs, for example sawmills
  • steam boiler plants for process steam production, for example food industry

The plant can be built to the site as a turn-key delivery including buildings, process equipment, commissioning and training, or we can deliver the process equipment to the client’s facility. The  plants are engineered and built to meet even the most stringent environmental requirements. Thanks to their architecture and low noise level, they can be located in the immediate vicinity of residential areas.

Biograte compact boiler plants for hot water or steam production are delivered to the site as prefabricated modules. We offer compact plants in the range of 3-6 MWth. The installation time at the site is short because of the high level of prefabrication at the Kiuruvesi workshop.

Biograte combustion technology

Biograte pic1
Biograte is a rotating grate with a conical primary combustion chamber, and its fuel input ranges from 3 to 25 MW / boiler. The fuel is fed from underneath to the center of the grate. It is dried in the middle of the grate by the heat that radiates from the refractory lining bricks and the flames without disturbing the burning fuel bed in the combustion zone. After the complete combustion of the residual carbon, the ash falls from the edge of the grate to the ash space filled with quenching water.

Main features:

  • High efficient combustion minimizes unburned char in ashes and enables low flue gas emission
  • Smooth fuel feeding with a stoker screw in the center of the grate
  • Controlled primary air distribution through grate plates enables low emissions
  • Safe wet bottom ash removal
  • Flue gas recirculation for grate cooling
  • No cold corners thanks to the conical design
  • Highest combustion efficiency in its class
  • Suitable for high moisture fuels, especially compared to traditional designs
  • Low auxiliary power consumption
  • Low minimum load
  • Already over 100 plants delivered
Technical data
 Model  Unicon Biograte HW
 Boiler  Water boiler
 Boiler size  3-25 MWth
 Boiler efficiency  up to 91 %
 Pressure (max)  16 bar
 Temperature (max)  180ºC
 Fuel  Wood chips, bark, sawdust, forest residues, peat


Technical data
 Model  Unicon Biograte ST
 Boiler  Steam boiler
 Boiler size  4-37 t/h
 Boiler efficiency  up to 90 %
 Pressure (max)  50 bar
 Temperature (max)  450ºC
 Fuel  Wood chips, bark, sawdust, forest residues, peat

Related materials: