DISADVANTAGES OF BIOMASS AS FUEL
- LOW CALORIFIC VALUE & HIGH MOISTURE CONTENT
- LOW ENERGY DENSITY - (IT IS NOT ECONOMICAL TO TRANSPORT IT OVER LONG DISTANCES)
- LOW COMBUSTION EFFICIENCY
- NON-HOMOGENEOUS FUEL - (VARIES IN SIZES/SHAPES & COMBUSTION PROPERTIES)
- HYDROPHILIC FUEL
- POOR GRINDABILITY - (ENERGY INTENSIVE PROCESS)
BIOMASS TORREFACTION CAN ADRESS THESE PROBLEMS EFFECTIVELY, HENCE BIOMASS CAN BE USED AS ALTERNATIVE FUEL EFFECTIVELY.
Biomass Torrefaction is a thermal process, which can be considered also as mild Pyrolysis, based on which the biomass is being heated in the absence of air, at temperatures between 150-350 oC. As a result the material is devolatilized and a solid hydrophobic carbonate residue is being formed with a Calorific Value around 5.550 kcal/kg.
For biomass torrefaction it is used material with low ash concentration (< 3 %), such as wood-chips, pomace, wood residues, agricultural residues etc. The biomass is being dried below 10 % and then grinded to the desirable size. Then is being feeded into a reactor, where it is heated at around 350 oC with variable time depending on the quality that has to be produced. After the completion of the process, the products are 70-90 % torrefied biomass and 10-30 % gas.
- The gas is being used for the biomass drying process and the endothermic torrefaction reaction, hence no waste residues are produced from the facility.
- The torrefied biomass can be used as a substitution of pet-coke or other fuels.
- HOMOGENEOUS FUEL - (IMPROVED SUPPLY RELIABILITY/REDUCED FUEL COST/IMPROVED FUEL AVAILABILITY)
- HIGHER HEATING VALUE
- HYDROPHOBIC FUEL - (TRANSPORTATION & HANDLING ARE CHEAPER/STORAGE OUTSIDE)
- HIGH GRINDABILITY
- CLEANER FUEL WITH LESS ACIDS IN THE SMOKE
INDUSTRIAL USE RESULTS