Manufacturing method for granular material

Abstract

This relates to technology that can efficiently produce recycled materials with a high carbon content. [Solution] The method for producing granular materials of the present invention includes a heating and stirring step in which materials to be treated, including waste, are heated and stirred in a storage section, which is the internal space of a treatment tank, to produce granular materials, and a storage step in which new materials to be treated are stored in the storage section after the heating and stirring step. In the heating and stirring step, the storage section is heated to 180°C or higher and 400°C or lower by a first heating unit that heats the wall of the treatment tank and a second heating unit that supplies heated gas to the storage section, and the materials to be treated are agitated by rotating an agitation shaft in the storage section, the agitation shaft having a shaft and a plurality of blades spaced along the outer periphery of the shaft. In the storage step, the new materials to be treated are stored in the storage section, leaving at least a portion of the granular materials behind, so that the volume of the generated granular materials exceeds at least a portion of the shaft.

Claims

1. A device for manufacturing granular material using waste, The wall section, A storage section capable of accommodating the waste to be processed, including the aforementioned waste, and surrounded by the aforementioned wall section, The aforementioned housing includes a stirring shaft that rotates to agitate the material to be processed, A processing tank having, A first heating unit for heating the wall portion, A second heating unit heats the gas exhausted from the aforementioned storage unit and supplies it to the aforementioned storage unit, Control unit and It is equipped with, The control unit, The first heating unit and the second heating unit heat the housing to 180°C to 400°C, and the stirring shaft is rotated in the housing to stir the material to be processed. A device for manufacturing granular materials.

2. The control unit controls the heating rate of the housing section using the first heating unit and the second heating unit. The apparatus for producing granular material according to claim 1.

3. The second heating unit is, An air supply unit that supplies the gas to the aforementioned housing unit, An exhaust section for exhausting the gas from the aforementioned storage section, The air supply section includes an air blowing section that blows the gas, It has a heating unit that heats the gas that is exhausted from the exhaust unit and supplied to the storage unit, The control unit, By operating the blower unit and the heating unit, the second heating unit is controlled to exhaust the gas from the containment unit by the exhaust unit, heat the exhausted gas by the heating unit, and supply the heated gas from the air supply unit to the containment unit. The apparatus for producing granular material according to claim 1 or 2.

4. The second heating unit is, The exhaust section further includes a temperature sensor that measures the temperature of the gas, The control unit, The temperature sensor monitors the temperature of the gas in the exhaust section, and the heating rate of the containment section is controlled based on the monitored temperature. The apparatus for producing granular material according to claim 3.

5. The control unit, After heating the housing section to 180°C or higher and 400°C or lower, the blower is activated to supply cooling gas from the air supply section of the second heating unit to the housing section, thereby cooling the housing section to 100°C or lower. The apparatus for producing granular material according to claim 3.

6. The second heating unit is, The exhaust section further includes a temperature sensor that measures the temperature of the gas, The control unit, When the housing is cooled to 100°C or below, the temperature of the cooling gas in the exhaust section is monitored by the temperature sensor, and the rate of cooling of the housing is controlled based on the monitored temperature. The apparatus for producing granular material according to claim 5.

7. The system further comprises an exhaust treatment unit that removes harmful substances contained in the gas exhausted from the aforementioned containment unit. The apparatus for producing granular material according to claim 1 or 2.

8. The system further comprises an oxygen supply unit that supplies oxygen to the gas exhausted from the aforementioned containment unit. The apparatus for producing granular material according to claim 1 or 2.

9. The stirring shaft is A shaft portion that can rotate around a rotation axis extending in a direction intersecting the vertical direction, The shaft portion has a plurality of fin portions provided on its outer circumferential surface at intervals along the rotation axis, The height of the shaft portion in the vertical direction from the bottom surface of the housing is 1 / 2 or less of the maximum vertical height of the housing. The apparatus for producing granular material according to claim 1 or 2.

10. The carbon content of the granular material is 30% by mass or more. The apparatus for producing granular material according to claim 1 or 2.

11. The aforementioned waste includes combustible waste, The apparatus for producing granular material according to claim 1 or 2.

12. The aforementioned waste includes thermoplastic resin, The apparatus for producing granular material according to claim 11.

13. The aforementioned waste contains cellulose, The apparatus for producing granular material according to claim 11.

14. The aforementioned waste includes absorbent articles, The apparatus for producing granular material according to claim 11.

15. The aforementioned waste includes infectious waste, The apparatus for producing granular material according to claim 11.

16. The generated granular material is used as fuel. The apparatus for producing granular material according to claim 1 or 2.

17. The energy generated using the fuel derived from the granular material is used as the power source. The apparatus for producing granular material according to claim 16.

18. The fuel derived from the granular material includes solid fuel produced by molding the granular material. The apparatus for producing granular material according to claim 16.

19. The power source of the aforementioned manufacturing apparatus includes energy derived from renewable energy sources. The apparatus for producing granular material according to claim 1 or 2.

20. The aforementioned renewable energy sources include electricity generated from solar power, The apparatus for producing granular material according to claim 19.

21. The aforementioned solar power generation includes electricity stored from solar power generation. The apparatus for producing granular material according to claim 20.

22. A method for manufacturing granular material using waste, A heating and stirring step in which granular material is generated by heating and stirring the material to be treated, including the waste, in the containment section which is the internal space of the treatment tank, After the heating and stirring step, a receiving step is performed in which a new workpiece is placed in the receiving section. Includes, In the aforementioned heating and stirring step, The first heating unit heats the wall portion of the processing tank, and the second heating unit heats the gas exhausted from the containment and supplies it to the containment, thereby heating the containment to 180°C to 400°C, and, The material to be processed is stirred by rotating the stirring shaft, which has a shaft portion that can rotate about a rotation axis extending in a direction intersecting the vertical direction, and a plurality of blade portions provided at intervals along the rotation axis on the outer surface of the shaft portion, within the housing. In the receiving step, the new material to be processed is received in the receiving section while leaving at least a portion of the granular material intact, such that the volume of the generated granular material exceeds at least a portion of the shaft portion. A method for producing granular material.

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