| 摘要 |
The method of removing moisture from a material contained within a dryer ( 3 ) comprises heating a first stream of gas (A 3 ); passing the heated stream of gas through a dryer ( 3 ) to extract moisture from the material to be dried; returning a first portion (E 3 ) of the used gas from an outlet of the dryer ( 3 ) to the heater ( 2 ), re-heating the second stream of gas (E 3 ) in the heater ( 2 ); and passing the heated second stream (B 3 ) back into the dryer ( 3 ), wherein the first stream of gas (A 3 ) is atmospheric air from which at least a proportion of the nitrogen present therein has been removed, to thereby increase the percentage by volume of oxygen in the first stream of gas (A 3 ).
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