HEAT-STORAGE TYPE CATALYTIC OXIDATION DEVICE AND 4-WAY SWITCHING VALVE

摘要

PROBLEM TO BE SOLVED: To provide a heat-storage type catalytic oxidation device for treating a gas containing a low concentration of combustion components with a less heating energy and without discharging an untreated gas, and provide a 4-way switching valve used in the device.;SOLUTION: The device comprises a supply pipe 21 for supplying a gas to be treated containing a low concentration of combustion components, an exhaust gas pipe 26 including a blower 27 for discharging treated gas, two reaction vessels 12, 13 filled with a heat storage material and oxidizing catalyst, respectively, a heating means 14 which is interposed between the two vessels 12, 13 and constituted with an electric heater, and a switching means 30 which connects the pipe 21 to the first reaction vessel 12 and the second reaction vessel 13 to the pipe 26, alternately switching the connection at every lapse of a given time, and when switching, closes the pipe 21 and the pipe 26 for a given time. Thus by closing the pipe 21 and the pipe 26 for a given time when switching, the pipe 21 and the pipe 26 bypass the two vessels 12, 13 and never be connected to each other, and thus no untreated gas is discharged.;COPYRIGHT: (C)2001,JPO