The Effect of Moisture of the Raw Material on the Properties Briquettes for Energy Use
Milan Brožek
At logging and at the subsequent wood and wood semi-products treatment the fine grained loose waste is arising, e.g. wood dust, saw dust, shavings, chips, bark etc. One of possibilities of its meaningful utilization is the briquetting technology, which product are briquettes determined for energetic utilization (combustion). This report contains the results of tests carried out with the aim to assess the influence of moisture on the briquettes final properties. For the tests the platan tree chips of four moisture levels, namely 5.7 %, 7.7 %, 15.7 % and 23.9 % were used. The basic physical-mechanical properties were the evaluation criteria. Following properties were determined: ash amount, gross calorific value, total moisture content, density, rupture force, length, diameter, weight and mechanical durability. From the results of carried out tests it follows that the best properties were reached at briquettes made from chips of moisture 7.7 %. At higher or lower moisture the briquettes properties were sharply failing (namely rupture force and density).
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