Spent grain fuel product and process
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United States of America Patent
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Sep 20, 2016
Grant Date -
Mar 7, 2013
app pub date -
Sep 1, 2011
filing date -
Sep 1, 2011
priority date (Note) -
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Abstract
A process of making a fuel product from spent grain from a beer brewing process. In the brewing process, the grain is pulverized to a particle size whose mean particle size is generally in the range of 0.25 mm to 0.6 mm with less than 1% greater than 2 mm. After the brewing sugars are extracted from the grain, the spent grain is pressed against a filter to reduce moisture below sixty-five percent (65%), and then the grain is dried to further reduce its moisture to less than ten percent (10%). The dried spent grain, after the aforementioned processing, is fed into a combustion chamber for a steam boiler that is used for beer brewing, and the spent grain is advanced downward through the combustion chamber with agitation to aid combustion.
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