Heat removal and recovery in biomass pyrolysis
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United States of America Patent
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Jun 8, 2021
Grant Date -
Dec 1, 2016
app pub date -
Aug 10, 2016
filing date -
Feb 22, 2011
priority date (Note) -
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Abstract
Pyrolysis methods and apparatuses that allow effective heat removal, for example when necessary to achieve a desired throughput or process a desired type of biomass, are disclosed. According to representative methods, the use of a quench medium (e.g., water), either as a primary or a secondary type of heat removal, allows greater control of process temperatures, particularly in the reheater where char, as a solid byproduct of pyrolysis, is combusted. Quench medium may be distributed to one or more locations within the reheater vessel, such as above and/or within a dense phase bed of fluidized particles of a solid heat carrier (e.g., sand) to better control heat removal.
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