Chemical chain combustion device and method for three-reactor structure

Abstract

The invention discloses a chemical chain combustion device and method for a three-reactor structure. The chemical chain combustion device comprises an air reactor fluidized bed, wherein the air reactor fluidized bed is connected with a cyclone separator through a lifting pipe; the bottom of the cyclone separator is connected with a fuel reactor; a spiral feeder is arranged on the fuel reactor. The chemical chain combustion device is characterized in that the fuel reactor is connected with a material inlet of a purification reactor through a down pipe; a material outlet of the purification reactor is connected with a reaction chamber of the air reactor fluidized bed through a return pipe. The structure of the device is especially suitable for chemical chain combustion reaction of solid fuel; materials are fluidized and purified by water vapor in the added purification reactor; the purposes of cleaning oxygen carriers and carrying fine particles out of the purification reactor can be achieved while carbon particles remained in the oxygen carriers are removed through a gasification reaction by adjusting the flow quantity of the fluidizing vapor.

Description

technical field [0001] The invention relates to a chemical chain combustion device and method with a three-reactor structure, belonging to the technical field of chemical combustion systems. Background technique [0002] Chemical looping combustion (Chemical looping combustion) technology is a revolutionary new combustion method, which decomposes the traditional one-step combustion reaction into two steps in the fuel reactor and the air reactor respectively, through the intermediate circulation of oxygen carrier (usually are metal oxides) supply oxygen from the air to the fuel. In traditional combustion reactions, because N 2 dilution, the CO in the flue gas 2 The concentration is only about 13%, and it takes a lot of energy to capture it; and in the chemical loop combustion process, the fuel and the air are isolated, so the flue gas generated in the fuel reactor will not be absorbed by the N in the air. 2 Diluted, its main component is CO 2 and H 2 O, high-purity CO ca...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is aimed at problems such as the oxygen carrier particles discharged from the fuel reactor containing residual carbon particles and the oxygen carrier particles (especially the natural oxygen carrier) constantly becoming thinner in the chemical looping combustion system of burning solid fuels, Improve the structure of the traditional chemical looping combustion reactor to achieve better system thermal performance and economic performance

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