| 摘要 |
PROBLEM TO BE SOLVED: To enhance the reliability and maintenance of a system by an inexpensive system by providing a check valve on the way of the bypass pipe from the outlet valve of a waste ozone decomposition column to a heater. SOLUTION: A system through which exhaust gas flows is controlled to decompose unreacted waste ozone in the exhaust gas passed through a mist separator 3 in a waste ozone decomposition column 7 packed with activated carbon at the initial stage of operation rising and, thereafter, the exhaust gas is heated by a heater 4 to raise the temp. of a catalyst to predetermined temp. When the temp. of the catalyst is raised, the system through which the exhaust gas flows is changed over to directly guide the exhaust gas to the heater 4 from the mist separator 3 and the waste ozone decomposition tower 7 packed with activated carbon is cut off from the system and it becomes unnecessary to stop the whole of the waste ozone decomposition apparatus 1A at a time of the displacement of activated carbon. Therefore, the repairing of machinery and the replacement of an ozone adsorbent become possible and an inexpensive and rational waste ozone decomposition apparatus high in reliability can be obtained. |
