Exhaust gas purification device and temperature control method therefor

The present invention is an exhaust gas purification device (1, 501) for purifying exhaust gas containing a combustible toxic component. This exhaust gas purification device comprises a plurality of heat storage chambers (13) which are each provided with a heat storage element (11) therein and provided with a pair of an air supply port and an air evacuation port (21, 23), a combustion chamber (15) which is formed to communicate with the upper parts of the plurality of heat storage chambers, air evacuation and air supply valves (17, 19) which are mounted to the air supply port and the air evacuation port of each of the heat storage chambers in order to perform switching between the supply of air to and the evacuation of air from the heat storage chamber, a heating burner (25) which is provided in the combustion chamber, a heat discharge damper (27); which discharges surplus heat from the combustion chamber, and a microcomputer (MC) which ignites/extinguishes the heating burner on the basis of a combustion cham