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Moisture content is a common challenge affecting the efficiency and quality of pellet production, leading to higher energy consumption and longer thermal drying times.
But mechanical dewatering of fibrous biomass is offering to shakeup the traditional pellet plant flow, with its ability to lower demand at both the dryer and the hammer mills. A high-pressure press installed before the dryer can squeeze out up to half the water of fresh wood chips, sawdust, hog fuel or any fibrous biomass.
Finnish-based Saalasti has been a producer of high-pressure presses since the ’80s and has introduced a new model – the Saalasti Press 1803 – that uses 30 to 40 kWh to remove one cubic metre of water from fresh wood chips. Thermal drying, by comparison, uses 670 kWh for the same result.
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