Pelleting of biomass

Energetics | Pelleting of biomass


We produce high-quality systems for biomass pellet and mediate in communication between the manufacturer and the claimant of pellets. Pellets use can reduce heating costs multiply when used in thermal power generation purposes, for example in furnaces on biomass, smaller or larger capacities.



Briquetting and pelleting technology - the pelleting process in which the crushed material under high pressure is turned into a compact form of high density, suitable for further handling and use. The final product is called pellet or briquette. Briquetting process has long been applied in the coal mines. Pressed on the piston presses the dust and small debris from coal. The word "briquet" in English meaning brick or tile. Therefore briquette can be in the form of bricks (prismatic) or in the form of a cylindrical roller. The word "pellet" in English means of rollers. Under the briquettes is defined as a product of the technological process of briquetting - compact form of biomass that has a much higher bulk density, than the bulk density biomass materials from which the briquettes made. Standard D.B9.021. under the Energy briquette means a product obtained by the procedure briquetting ligneous cellulose materials. The procedure consists in briquetting compression ligneous cellulose material in the smaller volume using system presses.



Size of pressure of press is determined by the physical properties of materials. Increased pressure corresponds to higher density of material (density) and vice versa. For compactness and strength of briquettes and pellets, except pressure of presses, impact and moisture content of the material and comminuted material. If the moisture content of the material is greater than 15% or less than 10%, the density of briquettes is reduced at the same pressure and the same cross section of the briquettes. With an increase in the moisture content of the material requires more force pressing to each other closer together and linked material particles. This is known as it is known that water is incompressible, ie squeezing excess water from the material necessary to provide additional force or energy. In contrast, at lower moisture content (10-15% of the optimal) in the material, the material is sufficiently resilient and difficult to compaction pressure and the cessation of the compressed material expands and cracks.

Division of pellets can be made according to the purpose, form, quality, volume weight and the number of components that make it in the following way:

1 Classification by the purpose of:

  • energy; 
  • organic fertilizer
  • forage;


2 Classification by the form of:

  • briquettes - which in cross section can be circular, polygonal, and others, thus forming rounded - cylindrical body and angular body shapes prism, polyhedron, etc.., typically used for energy purposes;
  • pellets - in the shape of a ball, the tetrahedron, cube, octahedron and others. usually used to feed livestock;


3. Classification by the volume weight of:

  • heavy pellet (whose density is above 1000 kg/m3)
  • light briquettes (up to max. 400-650 kg/m3);


4. Classification by the number of components involved in the formation of briquettes to:

  • only one component briquettes made of biomass (which can be represented only by one or more of the mass of plant origin in its composition);
  • composite briquettes, when the primary biomass can add one or more additive components that are not of plant origin in order to improve the thermal, physical, mechanical and aesthetic properties


Pelleting or briquetting of lignocellulose biomass is one of the most efficient use of biomass for use in thermal power generation purposes. This is a reduction in bulk volume of biomass, handling work easier and more efficient combustion of solid fuel boilers. As for agricultural waste, 25% of the biomass is suitable for theroenergetics purposes, or for the briquetting process, or the process of pelleting. By economic classification system for alternative energy sources, the use of biomass to obtain pellets (briquettes) that can be used for burning in special furnaces is the most cost effective form of alternative energy sources. This fact is true due to the high demand in the domestic and foreign markets, which is the high purchase price of the product. This renewable source of energy used by ligno-cellulosic residues as resources from productive activities that are obtained from:

  • Products derived activities in forestry (sawdust from wood processing ...)
  • Residues resulting from the activities in the field of forestry (sawdust and tree branches ...)
  • Products from agriculture (straw, corn, sunflower husk, dust silo ...)

Using the obtained pellets (briquettes):

  • space heating in homes and buildings using briquettes and pellets from biomass
  • electricity production - cogeneration process from biomass
  • remote or central heating - which is not yet developed gas network, and where the needs of district heating by oil and coal, in these cases, to the use of fossil fuels could be used as biomass-pellets or could be made complete replacement fuel.


One of reasons for the high demand of briquette-pellets in domestic and foreign markets is the high price of energy used to heat and € 0.42 per m3. When calculating the energy value of biomass briquetting, wood, and if the translation of the financial model, the use of briquette-pellets is 40% cheaper than heating with natural gas. Another reason for increasing demand for briquettes-pellet market is a shortage of natural gas and limitations of natural gas infrastructure in rural areas. It is therefore understandable decision of many companies that are responsible for district heating systems to introduce solid fuel boilers, and pellet furnaces.

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