MANUFACTURING WOOD PELLETS
We plan to build a 10 ton/hr wood pellet plant in Kake, which will create 29 new jobs initially and earn us $2,246,000 a year once fully developed. There is a huge demand for wood pellets for heating in Alaska and the northern states of USA where it gets very cold during winter.The venture will trade as Kui Kwaan Biofuels LLC.


Wood pellets

W
ood pellets are small "nuggets" of compressed, sawdust-sized wood fiber. People all over the world use wood pellets to generate heat and energy from renewable resources. The wood pellets are cylindrical in shape with standard diameters of 6 and 8 ( 0.5) mm (0.9" to 0.23") and lengths up to four times the diameter. Their compact size and portability, their high energy density, their low moisture content (below 10%), and their minimal net carbon output make wood pellets very appealing as a renewable energy source. Adding to their appeal, wood pellets are easily adaptable to automated combustion systems, and, with carefully controlled combustion, their emissions can be rendered marginal. A variety of wood sources (feedstock) can be used to produce pellets.

Usages

Usage of wood pellet is varied with objectives. In 100MW large-scale boilers, the shape of wood pellet is only used for transportation and storage, and wood pellet fuel is burned in suspension firing after crushing. This kind of large-scale boiler contributes to local energy supply such as generation of electric power and district heating and cooling system.

On the other hand, medium and small-scale boilers are used as an independent electric power plant in factories or for heating in hospitals and schools. A Pellet stove is another combustion installation that is easy to use in the house. These pellet stoves are very convenient, from the aspect of easy-to-handle and cost efficient for companies and houses when they are keen to introduce bio-energy in their building and save money. They have considerable advantage as a heating appliance as against using electricity or fossil fuel heating. Wood pellets are also used as animal bedding and as kitty litter and in the oil and chemical spill industries.

Some energy facts about wood pellets

1 Ton of wood pellets is equal to
120 gallons of heating oil 16,000 ft of natural gas
170 gallons of propane 4,775 KWh of electricity

How wood pellets are made

The biomass is first chipped, then ground to the size of sawdust. The biomass is dried to a moisture level <15% and then compressed under huge pressure (45,000psi) into small pellets. During this operation the temperature rises to >160C causing the lignin to melt and bind the pellet. The pellets are then cooled and passed over a shaker which removes the bits and dust and the pellets are then bagged and ready to be sent to market.


A wood pellet mill

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