Power plant boiler operation oxygen amount online correction method and device

The invention discloses a power plant boiler operation oxygen amount on-line correction method and device, a plurality of existing oxygen sensors are arranged on a rotating frame structure, the end part of the rotating frame structure is provided with an oxygen sensor mounting seat, and the rotating frame structure is driven by a servo motor to rotate so as to complete the radial switching action of the plurality of oxygen sensors; and the axial separation action of the oxygen sensor and the main flange interface of the outer wall of the flue is completed by driving the switching rod to pull the oxygen sensor mounting seat through the telescopic movement of the electric push rod in the axial direction. Aiming at an abnormal alarm condition of an oxygen sensor at a single position in a power plant boiler operation oxygen amount on-line monitoring system, a power plant operation center remotely controls a power plant boiler operation oxygen amount on-line correction device, so that axial plugging and radial swi