| 摘要 |
<p>A facility for treating a gas in a tunnel, comprising a duct (11) which enables the communication between the inside and the outside of the tunnel and can allow a gas (1) in the tunnel to flow to the outside, an electrical dust precipitator (12) which is arranged in the duct (11), a nitrogen dioxide absorbent (13) which is placed in the duct (11) on the side of downstream of the flow of the gas (1) relative to the electrical dust precipitator (12), an air-permeable fine filter (15) which is arranged between the electrical dust precipitator (12) and the nitrogen dioxide absorbent (13) in the duct (11) and can trap only particles having particle diameters of less than 20 µm, and an air-permeable coarse filter (14) which is arranged between the fine filter (15) and the electrical dust precipitator (12) in the duct (11) and can trap particles having particle diameters of 20 µm or more.</p> |
