| 摘要 |
<p>PURPOSE:To make the poisonous waste gas completely harmless even when trouble is caused in the device by stopping the supply of the poisonous waste gas to a combustion device when abnormality is caused in the combustion device and supplying the poisonous waste gas to an adsorption device. CONSTITUTION:Switching valves 67 and 68 are set in a poisonous waste gas pipeline 66, one of the valves is connected to the adsorption device 62, and the other valve is connected to the combustion device 63 through a flashback arrester 64. The valve 67 connected to the adsorption device 62 is closed in the normal operation, the valve 68 connected to the combustion device 63 is opened, and the waste gas is burnt. Meanwhile, when an abnormal increase in pressure is caused at least in the line of the combustion device 63, a flame in the furnace of the combustion device is extinguished, or a combustion gas is detected in the waste combustion gas discharged from the device 63, the valve 68 is closed, and the valve 67 is opened to adsorb the poisonous waste gas.</p> |
