Method and apparatus for pelletizing blends of biomass materials for use as fuel
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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Abstract
An assembly for processing green biomass materials from two separate feed sources for use as a fuel pellet includes a drying assembly, a torrefaction assembly and a heating assembly. The drying assembly is adapted to convert the green biomass material obtained from a first source to white biomass material. The torrefaction assembly is adapted to convert green biomass material obtained from a second source to torrefied biomass material. The heating assembly provides heat for both the drying assembly and the torrefaction assembly.
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Citations
16 Claims
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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:
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(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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An assembly for processing green biomass materials from two separate feed sources for use as a fuel pellet, said assembly comprising:
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(A) a predryer that is adapted to receive green biomass material from a first feed source and remove moisture from and raise the temperature of the green biomass material to produce a pre-dried biomass material; (B) a drying assembly for converting pre-dried biomass material obtained from the predryer to white biomass material; (C) a torrefaction assembly for converting green biomass material from a second source to torrefied biomass material; (D) 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 transfer coils to a temperature within the range of 200°
F. to 550°
F., said burner also producing flue gases;(3) means for conveying heated thermal fluid from the heat exchanger to the drying assembly; (4) means for conveying heated thermal fluid from the heat exchanger to the torrefaction assembly; (5) an exhaust stack for the flue gases; (E) means for conveying flue gases from the exhaust stack to the predryer. - View Dependent Claims (16)
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Specification