Patent ID: 10960445

Abstract:
A wood chip fermentation device includes: a chip fermenter 11 that is charged with wood chips serving as a heat source and that ferments the wood chips; a temperature sensor 11a that is provided inside the chip fermenter 11 and measures the temperature inside the chip fermenter; a thermal energy extracting pipe 12 that is disposed inside the chip fermenter and extracts fermentation heat from inside the chip fermenter; a pump section 13 that supplies a medium to or takes out a medium from the thermal energy extracting pipe 12; a stirring blade 14a that stirs wood chips 10a put in the chip fermenter 11; and a discharge conveyor 15 that is disposed at a lower portion of the chip fermenter 11 and discharges fermented material. The stirring blade 14a is disposed between the thermal energy extracting pipes 12 and a rotating surface thereof is in a state of being parallel to the thermal energy extracting pipes 12. A bottom surface of the chip fermenter 11 is formed in an arcuate shape such as to follow the rotating outer peripheral surface of the stirring blade 14a. A plurality of temperature sensors 11a are installed in a vertical direction inside each chip fermenter. Control of an on-off valve of the thermal energy extracting pipe 12 is performed based on temperature information from the temperature sensors 11a.