CPC C10G 1/002 (2013.01) [C10G 1/10 (2013.01); C10G 2300/1003 (2013.01); C10G 2300/202 (2013.01); C10G 2300/4006 (2013.01); C10G 2300/4012 (2013.01); C10G 2300/4018 (2013.01)] | 16 Claims |
1. A process for pyrolysis of a mixed plastic waste stream comprising
a. sending the mixed plastic waste stream to a melting reactor to produce a first vapor stream that is chloride-rich and a first liquid stream;
b. sending said first liquid stream to a pyrolysis reactor to be heated to produce a second chloride rich vapor stream and a second liquid stream wherein said pyrolysis reactor has a configuration comprising two cylindrical ring structures, an inner cylindrical ring structure within an outer cylindrical ring structure wherein a circulation liquid supply stream enters said pyrolysis reactor tangentially relative to a ring edge of said two cylindrical ring structures and wherein solid particles move in a downward direction to a bottom of the pyrolysis reactor;
c. sending said first vapor stream to an incinerator to remove hydrocarbons, hydrogen chlorides and alkyl chlorides and then to a gas cleaning zone to remove chlorine compounds and to heat at least a portion of said circulation supply stream as a reaction heat supply for said pyrolysis reactor, wherein said gas cleaning zone comprises a catalyst bed to remove dioxin compounds and a vessel containing caustic compounds to neutralize HCl; and
d. cooling and separating said second vapor stream into a third vapor stream and a third liquid stream and then treating said third liquid stream in at least one adsorbent bed to remove chlorine containing impurities.
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