Agenda - 12-01-2008 - 3d - Laserfiche WebLink

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Figure B+10. Process Diagram mf a Pyrolysis SysteM12 1.2.3 Plasma Arc Plasma arc technology is a gasification system that uses the intense heat generated by plasma torch todhvethe process. Net energy generation is not established based on Japanese and European experience. It is a pyrolysis- related process where ||tt|m or no oxygen is injected into a reactor. Atypica| unit is shown in Figure B-11' Electric current is passed through a series of torches at the bottom of a reactor, which heat process gas (not shown) to a temperature .in excess of5,OOOoF. This hot gas stream heats waste within the reactor to over 3,500vF and, as air is provided to the system at aldVV-contro||ed rate, some of the waste will burn to help maintain reactor `temperature. At this high temperature, organics within the waste will form elemental compounds, such as hydrogen, oxygen and carbon, with some of this carbon converting to carbon monoxide ormethane. The gas flow will have a high enough heat content to be able to sustain its own combustion and be used as a fuel gas external to the system. The inorganic portion of the waste will form a liquid slag which eventually drops from the reactor into a water bath. As soon as it hits the water it will shatter into a glassy-looking residue orhhtthat may be suitable for fill or use as a construction material. 12 Source: Integrated Energy Systems, Ino, Rornotand, CA. GBB/C08027-01 B-13 August 15, 2008