| 摘要 |
PROBLEM TO BE SOLVED: To simplify the structure of a gas distributing mechanism of a multi-bed heat storage type waste gas treatment equipment. SOLUTION: Flow passage selector valves 20a, 20b and 20c are provided to selectively connecting a first-a third heat storage chambers 3a, 3b and 3c provided to be communicated with a combustion chamber 2 to any one of a gas-to-be-treated supply pipe 16, a purge gas supply pipe 17 and a treated gas discharge pipe 18. The flow passage selector valves 20a, 20b and 20c are formed by air-tightly inserting a cylindrical valve element 22 into an outer cylinder 22 freely to be rotated, and a first-a third nozzles 23, 24 and 25 are arranged with an equal space in the circumferential direction of the outer cylinder facing to the valve element 22, and respectively connected to the gas-to-be-treated supply pipe 16, the purge gas supply pipe 17 and the treated gas discharge pipe 18. A fourth nozzle is provided, displacing from positions of the first -the third nozzles in the axial direction, and the valve element 22 is formed with a valve element flow passage, which is communicated with any one of the first-the third nozzles, freely to be communicated with the fourth nozzle, and a rotation phase of the valve element 22 is set by displacing a space between the first-the third nozzles from each other. COPYRIGHT: (C)2004,JPO
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