Fuel mix (co-firing)

    
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Biomass boilers
         For warm water

  • BIO
    Automated, pellet, wood chips,

  • Farmer
    Automated, pellet,wood chips,
    wood logs, multifuel


  • Automat
    Self-loading, automated,
    pellet, wood chips, multifuel

Steam boilers    

  • Low pressure steam (0,5bar) automated boilers for biomass, pellet, wood chips, multifuel        

Coal boilers

  • Automated brown coal boilers
    For warm water or low pressure steam

Fuel feeder systems


Fuel mixing
 

The fuel mixing is the most important use direction of CARBOROBOT boilers. This special designed boilers are able to burn mixes of different biomass and fossile fuels ( multi-fuel combustion).

The CARBOROBOT Classic boilers can operate with coal+biomass mixes up to 10-30% biomass added.

The CARBOROBOT BIO and BIO Farmer boilers can operate with coal+biomass and biomass+biomass mixes up to 0-100%

There is two main mix cathegory
Coal+biomass (co-firing)
Biomass+biomass.

Co-firing technology


Co-firing (Co-combustion) of the agriculture wastes, corn and grains with coal.
Several benefits were detected favouring the extensive use of biomass in energy production together with coal. Combustion of high Si-content biomass residues alone produced Cl-containing deposits, which tend to be corrosive. Sulphur and aluminium silicates, present in coal, peat and lignite, inhibited Cl deposition. Even small addition of coal to the feedstock hindered Cl deposition. As a synergetic effect, wood derived biomass strengthened SO2 capture from the flue gases of coal combustion. In short, co-combustion of biomass and fossil fuels has been argued for the following reasons:

__ SO2 and NOx emissions reduced by use of biomass fuels (in comparison with fossil fuels
alone). Co-combustion also reduces the net CO2 emissions
__ compensation of the seasonal fluctuations of the biomass availability by the fuel mixture
__ eventual higher cost of biomass fuels compensated by fuel mixture.
Co-firing is also a technique that prevent bed agglomeration and fouling in FBC units. Indeed, the risk of bed agglomeration, linked to increased amounts of alkaline metals (Na, K) is strongly reduced when peat is added.


http://www.et.byu.edu/~larryb/Cofire.htm
http://en.wikipedia.org/wiki/Cofiring
http://www.netbiocof.net/
http://www.biomassenergycentre.org.uk/portal/page?_pageid=75,41175&_dad=portal&_schema=PORTAL


Coal+switchgrass pellet


Coal+woodchipsk


Coal+corn


Coal+wheat


Coal+waste

Biomass fuel mix

The agriculture wastes, corn and grains can be mixed to pellet or woodchips. The mixing can help to use the bad dusty and wet materials as fuel and get energy. The good quality agripellet or dry woodchips are carrier materials of this mixes. The mix proportions need to determinate by the probes. The CARBOROBOT BIO and Farmer types are prepared for the biomass mixes.


Woodchips+waste


Woodchips+wheat


Pellet+waste


Woodchips+agripellet

 

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