Valmet BFB Boiler
Valmet’s boiler solution utilizing bubbling fluidized bed (BFB) combustion technology is called Valmet BFB Boiler (formerly HYBEX). Wide fuel flexibility, high combustion efficiency, high reliability, excellent controllability and low emissions have turned it into a real winner, with over 200 new deliveries and boiler conversions around the world.
Valmet BFB Boilers are available in the size range of 20 to 400 MWth. Their proven technology and design ensure excellent combustion results, as well as minimal unplanned shutdowns and maintenance. With Valmet BFB Boiler, you can count on high combustion efficiency of over 99%, resulting in boiler efficiency typically around 90% even with high moisture fuels.
For renewable biomass fuels
One of the advantages of the boiler is the possibility to use fuels with high moisture content and low heat value. Typical such fuels include wet biomasses and different types of process sludges.
Dry biomass is suitable fuel as well and references are ranging between 15 to 65% moisture content.
For various recycled fuels
Many boilers have a wide variety of fuels and the mixture may contain biomass and recycled fuels.
Typical recycled fuels are recycled wood, recovered industrial waste and even processed municipal waste (RDF).
Efficient control of flue gases
The BFB combustion principle is based on the fluidization of a sand bed. The hot bubbling sand and solid fuel are mixed together in the lower part of the furnace. The high heat capacity of the sand bed ensures fast fuel combustion and absorbs fluctuations in fuel quality.
The fundamental core of the Valmet BFB Boiler is the patented Hydro Beam grate. It enables efficient and reliable removal of impurities and coarse material from the bottom of the furnace. Over 30% of the rigid water-cooled grate construction area is open for easy removal of ash from the bottom.
Flue gas emissions are controlled with carefully designed Valmet in-house solutions, including the combustion air system, SNCR or SCR systems, electrostatic precipitators, fabric filters with additive injection and flue gas condensing scrubbers.
Customer success stories
Strong Focus on the Ecocycle - Borås Energi och Miljö, Sweden
A city free from fossil fuels - that is the dream of the waste management and energy production company “Borås Energi och Miljö”. To produce electricity and heat from household waste is an important step in making this dream become reality.
Nokianvirran Energia: New boiler plant utilizes local fuels
Nokianvirran Energia is owned by SCA Hygiene Products, Nokian Renkaat and Leppäkosken Lämpö. The power plant utilizes affordable local biofuels and sludges from tissue production as side streams.
Tampereen Energiatuotanto’s Hervanta woodchip-fired heat plant
The new heating plant located in Hervanta area of Tampere is fired by wood chips and peat produces totally genuine local heat
BFB in Heinola: Over 30 years in service and still going strong
Commissioned in late 1984, a bubbling fluidized bed boiler (BFB) has been serving Stora Enso’s fluting mill in Heinola, Finland, for nearly 250,000 hours.
Gainesville Renewable Energy Center
Gainesville Renewable Energy Center, the largest bio power plant in the US, produces 788,400 MWh of energy annually for local residents. Biomass power is carbon neutral and represents clean energy. Valmet’s process automation solutions contribute to the sustainable business.
Efficient energy conversion of a wide range of biomass in Nagocdoches, USA
Valmet-supplied boiler island with the world’s largest BFB Boiler features efficient energy conversion of a wide range of biomass in Nagocdoches, USA.
Biomass-fired steam boiler plant keeps Valio’s cheese plant running
A steam boiler plant generates the steam and heat needed by Valio’s Lapinlahti milk processing plant in Finland. The plant is fueled by wood chips and peat. Valmet’s delivery included all of the necessary installations, commissioning and a Metso DNA automation system.
The Dalkia story turned to a greener page
The Dalkia combined heat and power plant in Facture, southwest France has an extensive Valmet solution for biomass processing. The plant uses mainly bark and forest residues as fuel to produce 50 megawatts of electricity for the national grid and 74 megawatts of process steam for Smurfit Kappa’s paper mill.