Exhaust gas processing apparatus

An exhaust gas processing apparatus having a charge/discharge distribution device for a heat accumulation chamber divided into a charge region of introducing an exhaust gas into an exhaust gas processing chamber, a discharge region of discharging a purified gas from the exhaust gas processing chamber and a purge region of passing a purge gas for discharging the not processed exhaust gas remaining in the heat accumulation chamber, the distribution device having a rotor equipped with a purge chamber for passing the purge gas between a charge chamber for introducing the not processed exhaust gas and a discharge chamber for discharging the purified gas, the rotor having an opened disk that rotates opposing to the lower surface of the heat accumulation chamber and comprises a charge opening for introducing the exhaust gas from the charge chamber to the charge region and a discharge opening for discharging the purified gas from the discharge region to the discharge chamber and a purge opening formed between the charge opening and the discharge opening for communicating them.