Thermal Decomposition Extruder, Thermal Decomposition System, and Method of Manufacturing Decomposition Gas and Method of Emitting Decomposition Gas
AssigneeThe Japan Steel Works, Ltd.
InventorsYuji FUKUDA, Kenji INAGAWA, Yoshitaka KIMURA
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Abstract
In a thermal decomposition extruder, a hopper has an upper end closed. A sidewall of the hopper is provided with an emission hole for emission of decomposition gas produced during thermal decomposition of a polymer, to the outside of the hopper.
Claims15
A thermal decomposition extruder that thermally decomposes a polymer, the thermal decomposition extruder comprising:
- a screw that carries, plasticizes, and thermally decomposes the polymer;
- a cylinder where the screw is contained;
- and
- a hopper for injection of the polymer into the cylinder, wherein
- the hopper has an upper end closed, and
- the hopper includes a sidewall, the sidewall being provided with an emission hole for emission of decomposition gas to outside of the hopper, the decomposition gas being produced during thermal decomposition of the polymer.
A thermal decomposition extruder that thermally decomposes a polymer, the thermal decomposition extruder comprising:
- a screw that carries, plasticizes, and thermally decomposes the polymer;
- a cylinder where the screw is contained;
- a hopper for injection of the polymer into the cylinder;
- and
- an opening and closing apparatus switched between an open state in which an internal space in the hopper is connected to a space on outside of the hopper and a closed state in which the internal space in the hopper is disconnected from the space on the outside of the hopper.
A thermal decomposition extruder that thermally decomposes a polymer, the thermal decomposition extruder comprising:
- a screw that carries, plasticizes, and thermally decomposes the polymer;
- a cylinder where the screw is contained;
- and
- a shaft sealing mechanism that cuts off a flow of decomposition gas from an upstream end of the cylinder, the decomposition gas being produced during thermal decomposition of the polymer.
A thermal decomposition extruder that thermally decomposes a polymer, the thermal decomposition extruder comprising:
- a screw that carries, plasticizes, and thermally decomposes the polymer;
- and
- a cylinder where the screw is contained, wherein
- the cylinder includes
- a carrier portion that carries the polymer,
- a plasticization portion that plasticizes the polymer, and
- a thermal decomposition portion that thermally decomposes the polymer to produce decomposition gas, and
- while the screw is at a standstill, the carrier portion and the plasticization portion are cooled.
A thermal decomposition system comprising:
- a thermal decomposition extruder that thermally decomposes a polymer;
- and
- a suction apparatus, wherein
- the thermal decomposition extruder includes
- a screw that carries, plasticizes, and thermally decomposes the polymer,
- a cylinder where the screw is contained, and
- a hopper for injection of the polymer into the cylinder,
- the hopper has an upper end closed,
- the hopper includes a sidewall, the sidewall being provided with an emission hole for emission of decomposition gas to outside of the hopper, the decomposition gas being produced during thermal decomposition of the polymer, and
- the suction apparatus suctions the decomposition gas through the emission hole.
A method of manufacturing decomposition gas, the method comprising the steps of:
- (a) injecting a polymer through a hopper into a cylinder of a thermal decomposition extruder;
- (b) plasticizing the polymer with a screw in the cylinder;
- (c) thermally decomposing the polymer after the step (b);
- (d) emitting decomposition gas produced during the step (c) to outside of the hopper through an emission hole provided in a sidewall of the hopper;
- and
- (e) collecting the emitted decomposition gas after the step (c).
A method of emitting decomposition gas, the method comprising the steps of:
- (a) injecting a polymer through a hopper into a cylinder of a thermal decomposition extruder;
- (b) plasticizing the polymer with a screw in the cylinder;
- (c) thermally decomposing the polymer after the step (b);
- and
- (d) emitting decomposition gas produced during the step (c) to outside of the hopper through an emission hole provided in a sidewall of the hopper.
Dependencies are inferred from the claim text.