| 摘要 |
<p>Exhaust air purification system for eliminating formaldehyde from a corresponding contaminated exhaust gas stream of a biogas combustion device (10), is claimed. The exhaust gas stream coming from the combustion device is introduced directly into a chamber of a belt drying device (20), further passed through the belt drying device as processing air, and withdrawn at the end as drying exhaust air. The drying exhaust air is conducted at least via first and second gas purification systems (40, 50) formed as wet scrubbers, in which at least ammonia and formaldehyde is washed out respectively. Exhaust air purification system for eliminating formaldehyde from a corresponding contaminated exhaust gas stream of a biogas combustion device (10), is claimed. The exhaust gas stream coming from the biogas combustion device is introduced directly into a chamber of a belt drying device (20), further passed through the belt drying device as processing air, and withdrawn at the end as drying exhaust air. The drying exhaust air is conducted at least via a first gas purification system (40) formed as a wet scrubber, in which at least ammonia resulting in the drying exhaust air during the drying process is washed out, and is conducted at least via a second gas purification system (50) formed as the wet scrubber, in which at least formaldehyde present in the drying exhaust air emanating from the exhaust gas is washed out.</p> |
