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United States
  • Booth: 2254

OEP is a global supplier of renewable energy solutions.

Outotec energy solutions encompass technologies and services for both renewable and conventional energy production, combining fuel flexibility and performance.  Outotec Energy Products offers three different applications depending on fuel and other project requirements: Thermal Oxidation, Gasification and Advanced Staged Gasification.

Brands: gasification, thermal oxidation, waste-to-energy, renewable energy, EPI, fluidized bed boilers, combustion technologies, BFB boilers, power plants, operation & maintenance, Energy Products of Idaho


  • Outotec Fluidized Bed Advanced Staged Gasifer
    Outotec Advanced Staged Gasifier is the latest bubbling fluidized bed (BFB) technology developed by Outotec and its predecessors. Combining the reliability and proven design of the fluidized bed combustor with process benefits of fluidized bed gasifier....

  • Advanced Staged Gasifier incorporates the best characteristics of gasifier and combustion technologies to produce steam.

    The Advanced Staged Gasifier offers the following advantages and benefits over a BFB boiler:

    • Significantly reduced forced-draft fan power consumption
    • Smaller bed size
    • Lower bed operating temperature enable use of fuels with low ash-softening temperature
    • Staged combustion with long retention time eliminates exhaust-gas contaminants
    • Minimum agglomeration potential

      Gasification has become one of the preferred methods of energy recovery from a variety of fuels, including biomass and waste.  Biomass gasification is a process of converting the feedstock, typically wood, paper agricultural residue or other waste products into a synthesis gas to be utilized as a fossil fuel replacement.

      With Outotec FBSG technology, the incoming biomass or waste material is converted first to a gaseous fuel mixture and finally to a thermally oxidized, hot gas stream comprised of water vapor, and carbon dioxide plus non-hazardous ash residue.  The thermal energy is recovered in a combination of heat transfer surfaces in the combustor and a custom designed waste heat boiler.  This is referred to as “close-coupled” gasification, because the gasification process is immediately followed by the combustion process in a single combustor.  In the conventional gasification process, the low energy gas or LBG, typically in the range of 150 - 250 Btu/ft3, is extracted and burned in a separate and independent boiler, gas turbine or reciprocating engine.

      This advanced staged gasification system combines the advantages of gasification and the high conversion efficiencies of fluidized bed into a single vessel.  This technology is ideally suited for gasification applications that involve steam production for power generation.  After the low Btu gas has been generated in the fluidized bed zone it is introduced into a steam recovery unit wherein additional air is provided to complete combustion of the constituents.  The air is introduced in multiple levels, or stages, whereby the temperature profile of the reactant gases can be better controlled to eliminate the formation of gaseous pollutants, such as NOx.  The design of the second stage oxidation unit provides for significant residence time, plus further mixing and enhanced turbulence in the gas stream at each stage of additional air injection resulting in reduced emissions.  The Outotec Advanced Staged Gasifier can utilize biofuels at 50% moisture content or more.

      Outotec supplied FBC systems have consistently been accepted as Best Available Control Technology (BACT) by state and federal environmental regulatory agencies.  FBSG technology has been permitted in non-attainment areas, has been selected for projects in Europe and is currently in operation in the U.S. in various locations.  The technology is qualified as “Advanced Biomass Conversion Technology” for renewable energy credits requirements in a number of states.
  • Outotec Bubbling Fluidized Bed Combustion Boiler (
    Outotec FBC technology and energy systems provide economic and environmental solutions for a wide range of waste management problems....

  • In 1973 Outotec provided the first fluidized bed system in the U.S. to convert biomass to energy.  Since then, the company has continued to pioneer disposal of difficult waste materials and provide efficient, economical and environmentally favorable waste-to-energy solutions.

    The development of Outotec’s FBC technologies was initially in response to the needs of the forest products and related industries.  Many of the basic design features of these technologies were developed to deal with the challenges of combusting wood and other wastes from these industries. This resulted in a simple design that addressed the specific requirements of these industries and their wastes.  As a consequence of this initial development, the basic Outotec FBC design is unique in the industry and most adaptable to the challenges of burning fuels with very different handling, preparation, feeding, combustion and emissions characteristics, especially the full range of biomass and waste fuels.

    • Fuel diversity – more than 250 different fuels or fuel mixes have been used in Outotec fluidized bed solutions.
    • Bed recycle system
    • Complete and efficient combustion
    • Low Emissions
    • Favorable ash properties
    • Operating flexibility

    The Outotec FBC or Fluidized Bed Thermal Oxidizer for waste fuels benefits from over 40 years experience and 100+ energy cases. This reliable and tested overall design has been improved by combining several design elements especially related to waste fuels. The Outotec Fluidized Bed Thermal Oxidizer utilizes Outotec’s proven and robust boiler design and gas cleaning equipment.

    The Outotec FBC works reliably and with high efficiency with wide variety of waste fuels, however it is always designed to meet the Customer fuel specification. This tailoring takes into consideration for example fuel feed equipment, bed cleaning requirements or ash system dimensioning.
    Also e.g. the following options can be used to secure the operational reliability even with demanding fuels:

    • Air preheating for high moisture and / or low heating value fuels
    • In bed and vapor space heat transfer tubing for high heating value fuels
    • Exhaust gas recirculation

    Over the years Outotec has optimized the design and therefore the following benefits are currently automatically part of every Outotec Fluidized Bed technology package solution:

    • Sulfur and other acid components largely neutralized already in the fluidized bed
    • Vapor space volume over the fluidized bed is designed to secure complete combustion and low emissions via multi stage secondary air injection
    • Optimized chemical feeding points for efficient NOx suppression with minimal chemical consumption
    • Multiclones between boiler and economizer section reduce ash load in the baghouse and minimize Dioxin “de novo synthesis” effect and minimize Dioxin emissions
    • Staged gas cleaning allows majority of the ash to be extracted as non-hazardous ash, reducing the operational costs

    Semi-dry gas cleaning with reduced flue gas treatment chemical consumption and reduced stack plume risk

  • Outotec Waste-to-Energy Plants
    Turn waste into power with Outotec's robust waste-to-energy technology. Proven solutions generate valuable energy from variable wastes, from municipal sources such as SRF, RDF, C&D waste, to commercial and industrial wastes and agricultural wastes....

    • Works even with difficult fuels, e.g. those with a high moisture or ash content    
    • Offers the possibility to use fuels over a large range of calorific values, from 8 to 30 MJ/kg    
    • Boasts minimal emissions and low carbon in ash, with over 99% carbon burn-out    
    • Ensures compliance according to local regulations, such as the EU WID (Waste Incineration Directive)    
    • Eliminates bottom ash, with only clean, ready-to-recycle, non-combustible material from fluidized bed

    With Outotec's fluidized bed waste to energy technology you can process a wide variety of waste and turn it into synthetic gas or steam for further use, such as electricity production. Our robust solutions allow high flexibility in fuel heat value, moisture, and ash content without sacrificing the energy output of the system.

    Depending on your needs and fuel characteristics, Outotec offers two bubbling fluidized bed (BFB) gasifier technologies. The Outotec BFB Gasifier produces low or medium calorific value gas that can be used in internal combustion engines or turbines, or further developed into liquid fuels.

    The open nozzle grid bottom design is resistant to the contaminants within fuel and allows particles up to 100 mm to be removed from the process hot zone, with zero impact on the unit's availability or production rate.

    Good emission control is established using state-of-the-art equipment and through process design. Low bed temperatures virtually eliminate the formation of thermal NOx contaminants, and the limestone feed to the bed eliminates most of the sulfur and other fuel-borne acid contaminants as soon as they are released from the fuel.

    The fluidized bed gasifiers, staged gasifiers, and combustor have several design benefits:

    • Open-nozzle grid allows removal of non-combustible material from bed at full load    
    • Fully refractory-lined vessel for superior chemical and heat resistance    
    • Modular build minimizes on-site construction time and lowers overall project costs    
    • Vertical boiler allows for a low building height, giving more freedom to choose your plant location    
    • The floor standing structure doesn’t require a robust building envelope, as hanging boilers can even be located outside

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