An integrated system consisting of a zeolite rotor concentrator and a thermal oxidizer is a highly efficient VOCs-containing waste gas treatment system. The zeolite rotor concentrator is connected in series to a thermal oxidizer (TO) or regenerative thermal oxidizer (RTO). The zeolite rotor concentrator adsorbs the VOCs as the input waste gas. After being desorded by a hot purge gas flow, the concentrated high-concentration waste gas is introduced to the thermal oxidizer, where the VOC molecules are decomposed at a temperature higher than 1,350°F (732°C). Excess heat resulting from thermal oxidation is automatically used to preheat the high-concentration waste gas entering the thermal oxidizer, and to provide the hot purge air required to desorb pollutants from the rotor concentrator. The honeycomb zeolite rotor structure generates a rather low-pressure drop when adsorbing VOCs, and this helps reduce the power consumption of the exhaust fans to the greatest extent. As the flow rate of the concentrated waste gas is only 5% to 20% of that entering the system, the thermal oxidizer can have a relatively small size to save the fuel cost.
