To provide an exhaust gas treatment system which is capable of concentrating 15 fold or higher while maintaining the performance (regeneration efficiency and adsorption efficiency) of a plurality of concentration apparatuses and reducing fuel bill and electric bill of the burner.

The exhaust gas treatment system is provided with at least two concentration apparatuses provided with a concentration rotor divided into an adsorption zone, a regeneration zone, and a cooling zone and heat-accumulation- and combustion-type exhaust gas purifier, wherein the cooling zone in each concentration apparatus and a burning chamber of the heat-accumulation- and combustion-type exhaust gas purifier, and the regeneration zone and the burning chamber are connected with ducts via an opening and closing damper for cooling and an opening and closing damper for regeneration, respectively. The exhaust gas treatment system is further provided with a control apparatus for switching to the opening and closing damper for regeneration and then to the opening and closing damper for cooling or vice versa between the concentration apparatuses so as to supply a high-temperature gas of regeneration hot air for desorption prepared by mixing cooling air from the cooling zone with a high-temperature gas from the combustion chamber to the regeneration zone.

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