Flue gas comprehensive treatment method, tandem glue gas comprehensive treatment system and integral flue gas comprehensive treatment system

The invention discloses a flue gas comprehensive treatment method, a tandem glue gas comprehensive treatment system and an integral flue gas comprehensive treatment system. The flue gas comprehensive treatment method comprises the following steps: primary wet scrubbing, dry oxidation, and secondary wet scrubbing. A three-step treatment method combining wet scrubbing, ozone oxidation and wet scrubbing is adopted, and meanwhile various pollutants such as SO2, NOx and PM in flue gas are removed, so that the method has the advantages of high economical efficiency, compact system and good removal effect; oxides and particulate matters are desulfurized, and meanwhile the temperature of the flue gas is reduced, so that high-temperature self-decomposition of subsequently injected O3 is effectively inhibited, the utilization efficiency of O3 is improved, and the economical efficiency of system operation is improved; in the process of primary wet scrubbing, a part of NO in the flue gas is oxidized into NO2, SO3 in