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| The agropellet, agripellet |
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Many materials originated
by agriculture could be used for production of densified biomass
fuels agri-pellet: Some of them are straw, grain hull waste,
sugar beet waste, pruning, fruit stone, dry fruit waste, cork,
grain, cotton, malt and tobacco waste, with obviously, woody
residues. Agricultural residues refer to the portion of plant
material that remains after a crop has been harvested and
separated. Primary residues are those that are the result
of farm-level activities; they include items such as straw,
stalks and leaves that are left over after harvest. Secondary
residues are those that result from processing , such as sugar
beet pulps, cotton mill wastes, peanut shells, etc. For most
crops, and said roughly, primary residues are produced in
quantities approximately equal in weight to the crop production,
and are already used for different purposes (soil conservation,
animal feeding and litter, heating). The amount of secondary
residues varies widely depending on the crop and processing
methods used. Herbaceous grasses:
Switchgrass, Reed canary grass, Rye, Giant reed, Hemp, Miscanthus
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| Agripellet samples |
Corn stalk pellet 12mm |
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Crusty wood pellet 10mm
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Lucerne pellet 10mm
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Switchgrass pellet 12mm
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Bran+wood pellet 12mm
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Straw pellet 8mm
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Rapeseed pellet 10mm
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Sunflower seed peller 8mm
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Millet stalk pellet 10mm
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Deteriorate pellet
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| Type of ashes, slagging,
ash melting |
Straw contain potassium and sodium
compounds. These alkali compounds are present in all annual
crops and crop residues in particular. During combustion,
alkali combines with silica and causes slagging and fouling
problems in conventional combustion equipment designed for
burning wood at higher temperatures. Volatile alkali also
lowers the fusion temperature of ash: in conventional combustion
equipment having furnace gas exit temperatures above 800°C,
combustion of agricultural residue causes slagging.
The CARBOROBOT is specially designed boiler with lower temperatures
of fuel layer on the rotary grate, and it can reduce slagging
and fouling of these fuels. Practically the slagging of
the ashes of the agripellets not (or at very low level)
and the CARBOROBOT boilers can operate with agripellets
without additives.
Please wisit co-firing
page about fuel mixes
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Sunflower pellet ash
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Bran pellet ash
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Rapeseed pellet ash
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Straw pellet ash
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Switchgrass pellet slagging
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Coal slagging
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