The installation of a charcoal production unit can be done near a forest exploitation or a sawmill, because Blu Karb uses industrial and forestry wood waste to produce its charcoal.
Blu Karb also recovers non-market wood, such as branches which represent around 30% of a tree, for the production of its charcoal.
This wood waste is valued as charcoal, which prevents them from releasing CO2 by decomposing. This is another way of fighting greenhouse gas (GHG) emissions.
The production of charcoal follows the following process:
The charcoal production process, implemented by the "MAGE" technology, works according to an inverted draft (see diagram opposite), which makes it possible to burn the gases emitted in a chimney provided for this purpose. The gases are destroyed by a flare located at the top of the chimney, and the resulting hot air is conveyed in a silo to pre-dry the wood which will be transformed into charcoal during the next charring.
The ignition phase is thus completed, as is the carbonization cycle to obtain charcoal.
The spread of the kindling of small wood to the entire load constitutes the beginning of the combustion phase. Different reactions (described below) occur to complete the production of charcoal by carbonization : first endothermy, then exothermic and finally again endothermy.
During these different phases, the hot air that leaves the chimneys is directed to the wood pre-drying silos, in order to reduce the humidity level of the wood chips and thus accelerate the charcoal production process. Once the last reaction is complete, the kiln remains at rest for 4 to 6 hours, until the temperature drops to around 140°F.
The charcoal obtained is then poured and stored in dampers until complete cooling. The last phase is bagging, before transport for local shipment or export.
Wood is made up of 3 main substances: cellulose, lignin and water. The first two are strongly linked together to constitute the material called "wood". Water is absorbed, that is to say retained in the form of molecules on the surface of the cellulose / lignin complex.
Air-drying wood still contains 20-30% of absorbed water. Newly cut or "green" wood also contains water in liquid form, which gives it a total moisture content of 40 to 100%, expressed as a percentage of the weight of anhydrous wood.
This water will have to be eliminated as much as possible, it is therefore necessary to store the wood to eliminate a part of it, then to make it pre-dry in a silo in order to improve the profitability of charcoal production.