The invention relates to a treatment method and a treatment device for VOCs-containing
waste gas, the VOCs-containing
waste gas is heated and then enters a
catalytic oxidation reactor, the reactor takes a
fluidized bed as a main body and is filled with a particle
catalytic oxidation catalyst, and the
waste gas and the particle catalyst are subjected to a fluidized oxidation reaction; a cylindrical
fixed bed is radially arranged in the
fluidized bed and filled with a regular
catalytic oxidation catalyst, and the lower end of the
fixed bed penetrates through the bottom of the reactor and is gathered at an
exhaust pipe; a gas-
solid separator is arranged at the upper part of the
fluidized bed, fluidized and oxidized waste gas passes through the gas-
solid separator, catalyst particles carried by the waste gas are intercepted, separated gas enters from the top of the
fixed bed and is continuously oxidized, and high-temperature purified gas is exhausted through an
exhaust pipe. According to the method and the device, the
reaction temperature of catalytic oxidation is effectively homogenized, high-temperature hot spots of a catalyst
bed layer and influences on the service life of the catalyst are avoided, and meanwhile deep treatment of waste gas and effective utilization of heat are achieved.