Patent ID: 8373087

Claim:
A plasma torch for insertion through an opening in the wall of a waste processing chamber, said processing chamber having at least one liquid outlet at the lower part thereof, for removing molten material, said plasma torch comprising: a body having a front end, a rear end, a longitudinal outer surface, an outlet through which the high temperature plasma jet exits and a heat protecting ring, both located at said front end; a coaxial sleeve having an upper end and a lower end, said sleeve surrounding at least the portion of said longitudinal outer surface of said torch that is located in said opening in said wall, thereby forming an insulating chamber between said outer surface of said torch and the inner surface of said sleeve; and an inlet for introducing said heat exchanging fluid into said insulating chamber: wherein at least a part of said portion of said coaxial sleeve that surrounds at least said portion of said longitudinal outer surface of said torch that is located in said opening in said wall is porous or permeable to a heat exchanging fluid.