FIELD: cleaning of hot flue gases. SUBSTANCE: flow of fume-laden gas is fed to the installation for removal of NOx, then vapors of H2SO4 are condensed at a partial cooling of the flow with discharge of condensate. Then the flow is passed through the heat absorbing zone of the rotating regenerative heat exchanger-mass accumulator. After that the gas flow is fed to the installation for removal of sulfur oxides. The cleaned gas flow is passed through the heat transferring zone of the rotating regenerative heat exchanger-mass accumulator and discharged into the atmosphere. Waste heat is returned to the flow of cleaned gas before it comes in contact with the heat transferring zone. In another variant vapors of H2SO4 are condensed before contact and after contact of gas flow with the heat absorbing zone of the rotating regenerative heat exchanger-mass accumulator. Heat absorbed from the flow before its contact with the heat absorbing zone of the regenerator is returned to the flow of cleaned gas after its contact with the heat transferring zone, and heat absorbed from the flow after its contact with the heat absorbing zone is returned to the flow of cleaned gas before its contact with the heat transferring zone. The device for accomplishment of the method has successively located in gas flow installation for removal of NOx, regenerative heat exchanger-mass accumulator and installation for removal of SOx. The device is provided with a cold trap, installed before the heat absorbing zone of the regenerator, and a preheater, located in the flow of cleaned gas and connected to the cold trap according to the fluid medium principle. EFFECT: facilitated procedure. 13 cl, 8 dwg
