METHOD TO BURN CARBON-CONTAINING FUEL USING HARD OXYGEN CARRIER Russian patent published in 2011 - IPC F23C10/18 F23C10/01 F23G5/30 

FIELD: power engineering.

SUBSTANCE: method to burn carbon-containing fuel in a plant for burning, at the same time the method includes the following stages: (a) addition of a disperse selective oxygen sorbent into an absorption reactor of a burning plant to produce the first layer of particles in the absorption reactor; (b) fluidisation of the first layer of particles using the first oxygen-containing fluidising gas to produce the first partial pressure of oxygen p₁ in the absorption reactor to adsorb oxygen from fluidising gas to sorbent in order to produce a sorbent enriched with oxygen and vitiated waste gas; (c) discharge of vitiated waste gas from the absorption reactor along the first channel for waste gas; (d) transfer of the sorbent enriched with oxygen from the adsorption reactor into the burning reactor of the burning plant along the channel of sorbent transfer to produce the second layer of particles in the burning reactor; (e) fluidisation of the second layer of particles using the second fluidising gas, vitiated gas made mainly from carbon dioxide, besides, at least a part of the second fluidising gas is produced as a side flow of waste gas from the burning reactor, to produce the second partial pressure of oxygen p₂ in the burning reactor, where p₂ is less than p₁ for desorption of oxygen from the sorbent to produce free gaseous oxygen and vitiated sorbent; (f) introduction of a solid carbon-containing fuel into a burning reactor for fuel oxidization using free gaseous oxygen and to produce waste gas made mainly from the carbon dioxide and water, and to maintain low partial pressure of oxygen p₂' in the burning reactor, where p₂' is less than p₁, to continue desorption of oxygen from sorbent; and (g) discharge of waste gas containing carbon dioxide from the burning reactor along the second channel for waste gas.

EFFECT: invention makes it possible to improve efficiency of fuel burning.

29 cl, 4 dwg