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OwnerBengt-Sture Ershaginventor
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The invention relates to a method for the recovery of carbon and combinations of hydrocarbons from discarded tyres or similar polymeric material by pyrolysis, using a reactor (3) in which the material is placed in a preferably largely fragmented condition, whereby the material is heated to pyrolysis temperature by the recirculation of previously formed and heated pyrolysis gas which is led through the material and where the pyrolysis gas obtained in this way is brought to condense to condensable products in a condenser (8) connected to the reactor. In order to improve the possibilities of control of the process of pyrolysis, a reactor is used with an inlet (6) and an outlet (7) so that a gas can be led through the reactor (3) passing over the polymeric material which is placed in it, whereby at least a part of the pyrolysis gas which does not condense in the condenser (8) is heated to a predetermined temperature and is led by recirculation in a circuit through the reactor for heating the polymeric material placed in it.
A method for the recovery of carbon and combinations of hydrocarbons from discarded tires or similar polymeric material by pyrolysis treatment in a reactor (3) whereby the material is heated to pyrolysis temperature in the reactor and the pyrolysis gas obtained is withdrawn from the reactor and brought to condense in a condenser (8) connected to the reactor, characterized by the use of a reactor (3) having an outwardly sealable space in which material is loaded batchwise, an inlet (6) and an outlet (7) forming part of a recirculation circuit wherein a preheated gas is led through the reactor and the condenser passing through and in direct contact with the polymeric material placed in said reactor, wherein at least a part of the pryolysis gas obtained and withdrawn from the reactor which does not condense in the condenser (8) is heated to a predetermined temperature and by recirculation in said recirculation circuit, is led through the reactor for heating of the polymeric material in the reactor.
Dependencies are inferred from the claim text.