TURBULENT FLOW COLD-WALL REACTOR

A high pressure and high temperature reactor (10), comprising a pressure vessel (22) and a reaction chamber (12) enclosed within the pressure vessel forming an annular space (24) providing thermal insulation of reaction chamber (12); a feeding tube (30) ending in the vicinity of the top chamber (12) end; an effluent output (34) at the bottom vessel (22) end; a quench tube (36) and further supplimental tubes for introducing first and second constituents in the reaction zone, an inert fluid inlet adaptable to introduce fluid to the annulus (24). The reaction chamber is made of titanium or covered with a liner material comprising titanium, noble metals or platinum. The reactor is especially designed for oxidation of aqueous waste liquids under supercritical water conditions.