| 摘要 |
In a plant having a dryer for organic materials, especially wood chips through which hot gas from a combustion chamber can be passed, and the exhaust gases, laden with combustible contaminants, can be passed through indirect heat exchangers, by-pass ducts carrying exhaust gas from the dryer are associated with the heat exchangers, along with hot gas ducts to and from the combustion chamber. After a heat exchanger has been shut off from the exhaust gas stream from the dryer, the same heat exchanger can be connected for cleaning to a portion of the hot gas from the combustion chamber.
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