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Method and apparatus for pelletizing blends of biomass materials for use as fuel

  • US 9,562,204 B2
  • Filed: 10/24/2013
  • Issued: 02/07/2017
  • Est. Priority Date: 09/14/2012
  • Status: Active Grant
First Claim
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1. An assembly for processing green biomass materials from two separate feed sources for use as a fuel pellet, said assembly comprising:

  • (A) a drying assembly for converting green biomass material from a first source to white biomass material;

    (B) a torrefaction assembly for converting green biomass material from a second source to torrefied biomass material;

    (C) a heating assembly comprising;

    (1) a heat exchanger having a plurality of heat transfer coils therein containing a thermal fluid;

    (2) a burner for heating the thermal fluid in the heat transfer coils to a temperature within the range of 200°

    F. to 550°

    F., said burner also producing flue gases;

    (3) a combustion chamber that is operatively connected between the burner and the heat exchanger;

    (4) means for conveying heated thermal fluid from the heat exchanger to the drying assembly;

    (5) means for conveying heated thermal fluid from the heat exchanger to the torrefaction assembly;

    (D) a pellet press for pelletizing a blend of biomass materials processed in the drying assembly and biomass materials processed in the torrefaction assembly;

    (E) a VOC duct for conveying gases collected at or downstream from the pellet press to the combustion chamber.

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