| 摘要 |
PURPOSE:To decrease an energy loss by constituting the apertures at both ends of a catalyst purifying device body as a gas inlet and outlet which can be alternately changed over as the inlet or outlet for gases, providing catalysts and a heater at the center and providing heat accumulators, respectively having corrosion resistant honeycomb structures in the midway of gas flow passages from both ends to the center. CONSTITUTION:The apertures at both ends of the catalyst purifying device body 5 are constituted as the gas inlet and outlet 1, 8 which can be alternately changed over as the inlet or outlet for the gases. The catalysts 3 and the heater 4 are disposed at the center and the heat accumulators 2, respectively having the corrosion resistant honeycomb structures, are provided in the midway of the gas flow passages 6 from both ends to the center. The exhaust gases deprive the one heat accumulator 2 of heat, are heated by the heater 4 and pass the catalysts 3. The exhaust gases are deprived of heat by another heat accumulator 2 and are cooled, then the gases are released. The surface area ratio of the heat accumulators 2 to the air quantity is set at 60 to 1200cm/h and the flow direction 7 of the gases is reversed at every specified time to exchange the action of the heating or cooling of the respective heat accumulators 2. |
