Method for pyrolysis of waste material in an industrial process
AssigneeCCT International, Inc.
InventorsRik Van Meirhaeghe, Johannes Dingenis Van Der Endt, Dries Parmentier
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Abstract
A method for pyrolysis of a mass of waste material, includes: providing a screw arrangement adapted to supply heat to the mass by mechanical shear; providing a reactor after the screw arrangement, adapted to supply heat to the mass in the absence of oxygen by heating the reactor wall; heating the mass to an exit temperature and increasing the pressure to an exit pressure in the screw arrangement; thermally degrading the mass in the reactor. The mass is brought into an extreme condition at the exit temperature and exit pressure by the screw arrangement, such that during the pressure drop pyrolysis occurs, thereby forming gaseous hydrocarbons within the connecting element.
Claims15
A method for pyrolysis of a mass of waste material, comprising:
- providing a screw arrangement adapted to supply heat to said mass by mechanical shear;
- providing a connecting element, wherein said connecting element is connected to an exit of said screw arrangement;
- providing a reactor downstream of said connecting element, wherein said reactor is adapted to supply heat to said mass in absence of oxygen by heating a reactor wall with an external heat source;
- heating said mass in said screw arrangement to an exit temperature such that said mass is at least partially melted;
- transporting said mass through said connecting element;
- and
- thermally degrading said mass in said reactor such that carbon-carbon bonds in said mass are broken by pyrolysis and volatile hydrocarbons are formed,
- wherein said method further comprises:
- increasing a pressure of said mass through said screw arrangement to an exit pressure;
- and
- expanding said mass in said connecting element, with a pressure drop from said exit pressure to a lower pressure;
- wherein said mass is brought into an extreme condition at said exit temperature and exit pressure by said screw arrangement, such that during said pressure drop pyrolysis occurs, thereby forming gaseous hydrocarbons within said connecting element.
Dependencies are inferred from the claim text.