| 摘要 |
Method for treating a medium, said medium being passed successively through a first duct in a first heat exchanger, through a second heat exchanger and then through a second duct in the said first heat exchanger, the said first and second ducts of the first heat exchanger being separated from one another and being in a heat-exchanging relationship with one another, care being taken to ensure that one or more constituents from the medium escape selectively through the respective duct wall from the first or second duct, to be collected in a third duct in said first heat exchanger, said third duct being separated from said first and second duct.
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