Wood powder: an upgraded wood fuel
1992
Marks, J.
When upgrading wood fuel to a very dry and fine fraction, like wood powder, the result is a uniform fuel, easy to handle and with a high energy content. Another result is a radical increase in the velocity of combustion so that the burning technique can be changed. Wood powder will burn in a flame in the same way as oil or gas and give the same high power output. By moving the problematic and difficult part of the wood preparation to a separate operation, the advantage of large-scale production can be fully utilized. At the same time, the usage will be simple and efficient both in large- and small-scale operations. The change in burning techniques makes wood powder an alternative with access to a larger market than other wood fuels. In principle, all heating done by oil can be replaced by wood powder even in small boilers in limited space and in densely built-up areas. The energy spent in upgrading is fully compensated for through more efficient handling and combustion. As with the energy balance, the costs of production are recovered in the combustion. Higher combustion efficiency also results in reduced fuel consumption. Other factors, such as the use of a cheap raw material and a large market with high annual utilization, also have a positive influence on the economy. The easy handling will result in systems with good reliability and high availability. Consequently, it should be possible to achieve a good economic return using wood powder, thereby creating a more competitive wood fuel.
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