BIOMAC ECOLOGICAL FUELS are made from pure biomass – sawdust, shavings or washed tree bark. This is an inexhaustible source in the Czech Republic, growing in volumes exceeding what is used up, in contrast to the traditional fossil fuels the reserves of which are diminishing constantly and, as a consequence, which come with an ever-increasing price.
From the future heating requirements point of view, the BIOMASS from which the BIOMAC ECOLOGICAL FUELS are produced is the oldest and actually the only renewable source of fuel we have available in the Czech Republic for the 3rd millennium (the sun and water are insufficient as an industrial energy source in this country).
• Raw material acceptance, biomass processing by crushing and sieving
• Biomass drying
• Biomass compression into the product
• Wood briquette packaging
The incoming material includes mainly bulk matter such as sawdust, shavings and chips. Typically, a wheel loader transfers the loose biomass from a sheltered raw material storage area into a large storage bin two or three times during a shift. The loose material is passed through a rotary sieving machine wherefrom the fine fraction 0-10 mm size goes directly to a bin at the dryer while the coarse fraction is additionally crushed in a high-speed crusher or a hammer mill. Once additionally crushed, this fraction is added to the fine fraction in the bin at the dryer.
Agricultural BS-6 hot-air dryers are typically used in the Czech Republic to remove excess moisture from the biomass. These are three-way rotary drum dryers in which the material is dried with direct combustion gas, whereby an evaporating capacity up to 2 tons of water can be attained, the specific heat consumption being as low as 6 MJ per kg of evaporated water.
Generally, wood briquettes are obtained from the dry biomass by high-pressure processing at an elevated temperature, whereby the resin and lignin in the biomass are melted and help transform the biomass into a compact body. No adhesives or other ingredients are added! Three compressing principles have been invented for pressing the biomass into wood briquettes.
All the briquettes made from biomass are manufactured without using any adhesive: only high pressure and temperature are used to obtain the compact product. The briquettes have only one drawback: they must not get in contact with moisture. To this end, all briquette types are packaged in closed PE (polyethylene) bags or wrapping including the final pallets. For the product to sell well, the goods must be professionally packaged in amounts small enough for a woman or an elderly person to be able to handle the goods without any problems. The package must carry the manufacturer's label, barcode and guaranteed package weight. This process is frequently fully automated in large plants.