Research on the performance of Fe-based oxygen carrier assisted combustion in circulating fluidized bed boilers.

Under the dual carbon target, circulating fluidized bed boilers are not only a coal-fired power generation technology with great commercial value and development potential for refining enterprises, but also the main source of carbon emissions in refining enterprises. With the development of CFB boiler technology and the increasing capacity of boilers, the problem of poor air-fuel mixing caused by the position and method of inletting feedstock and air during the operation of large industrial CFB boilers has gradually become prominent. In order to improve the combustion efficiency and stability of coal-fired circulating fluidized bed boilers and reduce CO₂ emissions, this study developed an Fe-based oxygen carrier based on the principle of OCAC technology, and analyzed the performance of the oxygen carrier on a bubbling bed reactor and a 0.3 MW/h CFB coal-fired reactor. Fe-based oxygen carrier has excellent performance of oxygen absorption and oxygen release, the CO conversion rate can reach more than 88% on the bubbling bed reactor, and reach 52% ~65% on the 0.3 MW/h CFB reactor. The emissions of pollutants such as NO_x and SO₂ in the flue gas have been reduced. [ABSTRACT FROM AUTHOR]