| 摘要 |
A gas scrubbing system comprising a plurality of water-fed scrubber units each coupled to a respective exhaust stack of a conventional hot-air dryer and each receiving its water supply from a common, centralized, skimmer-type water treatment facility. Non-aqueous gaseous pollutants, such as hydrocarbons, extracted in vapor form from wood or other material within the dryers by a stream of heated drying gas, is condensed from the drying gas prior to exhausting such gas to the atmosphere by conducting the gas through a plurality of scrubber stages in the presence of cooling spray water until the temperature of the gas, due to the effects of heat transfer, has dropped below the condensation temperature of the gaseous pollutants. The condensed liquified pollutants are then removed from the gas by contact with the water spray and conveyed from the scrubbers along with the spray water while the cleansed gas stream is vented to the atmosphere. A centralized, skimmer-type water treatment facility connected to each of the scrubbers is provided to receive the spray water and separate the condensed non-aqueous pollutants therefrom, thereby permitting the spray water to be recirculated back through the scrubbers for reuse and the pollutants to be reclaimed if desired.
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