PLASMA GASIFICATION MELTING PROCESS

ABSTRACT 

Many areas have a need for establishing or extending landfill. As an alternative to the existing   concept   of   a   landfill,   a   new   waste-disposal technology    named    Plasma    Gasification  Melting  (PGM)  was  developed.  Plasma  Arc technology has been applied to the treatment of municipal solid waste (MSW).  This  recent development  would  eliminate  or  minimize  the need  for  a  landfill  and  this  approach  is known   as   Plasma   Arc   Gasification   process   for   the treatment of MSW. A pilot PGM reactor was constructed in northern Israel. The reactor is an updraft   moving-bed   gasifier,with  plasma  torches  placed  next  to  air  nozzles  to  heat  the incoming air to 6000oC. The inorganic  substances  of  the  feedstock  are  melted  by  the  high-temperature  air  to  form  a vitrified slag in which undesirable materials such as heavy metals are trapped. The residual heat in the air supplies additional heat for the gasification process. A  series  of  tests  were conducted   to   study   the   performance   of   PGM   gasification.   For air   gasification,   the syngas   LHV (Lower Heating Value) decreased   with   increasing   ER( equivalence ratio ), whereas   the  gas  yield   and energy efficiency increased with ER. When high-temperature steam was fed into the reactor,  the overall gas yield was increased  significantly,  and the syngas LHV also increased slightly. The  positive  effect  may  be  attributed  to  the  steam reforming   of   tar.   The maximum  energy efficiency of the tests reached 58%. The main energy loss was due to the formation of tar.

PLASMA GASIFICATION MELTING PROCESS ppt

PLASMA GASIFICATION MELTING PROCESS report