| 摘要 |
<p>Apparatus for drying using hot and dry gases, comprising at least two zones traversed successively by the material to be dried. The apparatus comprises: a heat pump, the condenser (12b) of which is arranged in the second zone (2) so as to heat by contact the gases circulating in this zone, and the evaporator (8b) of which is placed in an external device for dehydration and reheating; a source of calorific energy (11b) arranged in the first zone (1) so as to heat by contact the gases circulating in this zone; means of extraction (6) for drawing up the totality of the gases circulating in the first zone and introducing them into said external device for dehydration and reheating in order that they come into contact with the evaporator of the heat pump in order to be dehydrated, and means (10) in the external device for dehydration and reheating, for reheating and reintroducing into the first zone at least a part of these gases, in the vicinity of the junction (4) between the first and the second zone, said gases then mixing with the gases coming from the second zone and feeding the first zone. <IMAGE></p> |
