Patent ID: 7820139
Filing Date: 2010-10-26
Classification: C10J,F23C,Y02E

Abstract:
1. A method for effecting the energy conversion of solid fuels containing carbon comprising: reacting the solid fuels with oxygen provided by oxide particles to create flue gases and unconverted compounds in a first oxide reduction reactor having an exit, wherein the first oxide reduction reactor includes a first circulating fluidized bed; providing the flue gases, oxide particles and unconverted compounds from the exit of the first oxide reduction reactor directly to an inlet duct of a gas-solid separation cyclone, the separation cyclone also having a roof, and an exit, wherein the separation cyclone rotates the flue gases, oxide particles and unconverted compounds to create increase residence time within the cyclone and to separate out the oxide particles and convey the separated oxide particles to an oxide oxidation reactor; injecting oxygen into the separation cyclone of the first oxide reduction reactor to convert unconverted compounds exiting the first oxide reduction reactor; oxidizing the oxide particles in the oxide oxidation reactor, wherein the oxide oxidation reactor includes a second circulating fluidized bed; and circulating the oxide particles between the oxide oxidation reactor and the first oxide reduction reactor for conversion of the fuel and oxidization of the oxide particles.