Patent ID: 8551200

Claim:
A method for vertically producing a steam and combustion gas mixture, the method comprising: mixing a carbon or hydrocarbon fuel and an oxidation gas containing oxygen; combusting the mixture at a controllable pressure and temperature so as to convert the fuel to a flowing gas and solid byproducts, said solid byproducts being in a solid or a liquid form; mixing liquid water into the flowing gas, said liquid water having suspended and dissolved solids and organics and being injected in an amount such that said liquid water is converted into steam while reducing the combustion gas temperature for generating produced gas; converting liquids to gas and solids so as to generate steam and solid waste; injecting a portion of said produced gas at a temperature lower than the combustion gas temperature through a fluid bed section below the combustion so as to increase the heat exchange duration and to cool combustion solid particles where the injected produced gas is injected below the combustion; and discharging the produced steam, gas and solid mixture.