Outotec Energy Products

Coeur d Alene,  ID 
United States
  • Booth: 6430

OEP is a global supplier of renewable energy solutions.

Outotec energy solutions encompass technologies and services for both renewable and conventional energy production.  Our flexible technologies can use a wide variety of fuels.  Our lifecycle solutions support you every step of the way, from plant design and implementation to ongoing operation support, as well as maintenance and modernization.

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
    Advanced Staged Gasifier combines the reliability and proven design of the bubbling fluidized bed combustor with the process benefits of the 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

    The Outotec Advanced Staged Gasifier (FBSG) is based on over 40 years of experience and more than 100 energy system installations using their bubbling fluidized bed (BFB) technology.  Its reliable and well-tested design has been improved with design elements from the Outotec BFB gasifier to offer the best features of both technologies.

    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 (BFB) Boiler
    In 1973 Outotec provided the first fluidized bed system in the U.S. to convert biomass to energy. Outotec continues to provide efficient, economical and environmentally favorable waste-to-energy solutions....

  • The development of Outotec’s fluidized bed 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 ot thermal oxidizer 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.

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

    The Outotec 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 Fluidized Bed Thermal Oxidizer 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

    Fluidization is a term used to describe the characteristics created by passing an air stream vertically upward through a bed of solid particles.  The upward velocity creates a lifting or buoyancy effect on the particles, resulting in the suspension of those particles within the air stream.  As the air velocities are increased above a minimum fluidization velocity, the particles are no longer held to normal solid-to-solid contact and they can float and migrate within the air stream.  The fluidized media exhibits the physical qualities of a fluid and looks like a pot of water in a rolling boil.  The result is that the physical characteristics of the mixture become very homogenous.

    Fluidized bed combustion systems offer the ability to acceptably handle the greatest range of fuel qualities of any energy recovery technology currently available.  By their basic design, fluidized beds provide a significant thermal flywheel in the heat storage capacity of the usually inert bed material that supports complete combustion of extremely wet fuels.  Temperatures around 1800°F (982°C) are necessary to insure adequate combustion of all the volatile components and the remaining carbon.  Fuels having moisture levels as high as 70% are theoretically capable of generating these temperatures; however, (in most types of combustors) the process of driving off the moisture usually reduces the reaction temperatures below an acceptable range to maintain the combustion process.  With a fluidized bed, the bed media utilized to create the fluidizing action provides an external source of energy to dry the individual fuel particle out sufficiently to allow the combustion of the remaining materials to occur.  Once the fuel particle is burning and releasing its energy, the heat borrowed from the sand during the drying step is replenished.  The result is the sand temperature is maintained and the wetter fuels can be burned completely.

  • Outotec Fluidized Bed Gasifier
    The Outotec Gasifier can be built to be air or steam driven unit depending on the heat value requirement of the synthesis gas....

  • The Gasifier gives the Customer possibilities to select the synthesis gas calorific value to meet the demands of the processes downstream. The main benefits of Outotec Gasifier are:

    • Air or Steam & Oxygen blown depending on the synthesis gas calorific value requirement
    • High carbon burn out in the bed
    • Maximized modularity with the other fluidized bed units for spare part and services availability

    Additionally the following benefits are unique to the Gasifier and Advanced Staged Gasifier:

    • Reduced bed area for lower parasitic electrical load consumption
    • Lower in bed reaction temperature further reducing the NOx formation
    • Increased bed reliability due to higher margin between bed temperature and fuel related contaminants melting point

    In a fluidized bed gasifier, the bed material can either be sand or char, or some combination.  The fluidizing medium is usually air; however oxygen and/or steam are also used.  The fuel is fed into the system either above-bed or directly into the bed, depending upon the size and density of the fuel and how it is affected by the bed velocities.  During normal operation, the bed media is maintained at a temperature between 1000ºF and 1800ºF.  When a fuel particle is introduced into this environment, its drying and pyrolizing reactions proceed rapidly, driving off all gaseous portions of the fuel at relatively low temperatures.  The remaining char is oxidized within the bed to provide the heat source for the drying and de-volatilizing reactions to continue.  In those systems using inert bed material, the fuel particles are subjected to an intense abrasion action from fluidized sand.  This etching action tends to remove any surface deposits (ash, char, etc.) from the particle and expose a clean reaction surface to the surrounding gases.  As a result, the residence time of a particle in this system is only a few minutes, as opposed to hours in other types of gasifiers.

    The large thermal capacity of inert bed material plus the intense mixing associated with the fluidized bed enable this system to handle a much greater quantity and, normally, a much lower quality of fuel.  Experience with Outotec’s fluidized bed gasifier has indicated the ability to utilize fuels with up to 55 percent moisture and high ash contents, in excess of 25 percent.  Because the operating temperatures are lower in a fluidized bed than other gasifiers, the potential for slagging and ash fusion at high temperatures is reduced, thereby increasing the ability to utilize high slagging fuels.

    Energy densities in a fluidized bed gasifier are dependent on the fuel characteristics and have been reported as high as four million Btu/hour/ft2.  Normally, the dryer the fuel the higher the energy density and the better the quality of low Btu gas produced.

    In general, gasification systems can be used in nearly every application in which natural gas, oil or pulverized coal are being used. Low Btu gases can be used to fire cement or lime kilns, rotary dryers, wood veneer dryers or dry kilns, air heaters, steam boilers, and turbine or diesel generator sets.  The simplest application for a fluidized bed gasifier is to fire or co-fire an existing steam boiler.

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