| 摘要 |
<p>The invention provides a method and an apparatus (10) or installation for heating solid material. The invention involves two conveyances (18, 20) which are used to convey two streams of the solid material in opposite directions alongside each other through a hot zone between two temperature adjustment zones. The solid material is kept at an elevated temperature in the hot zone (30) and is heated/cooled in each of the temperature adjustment zones (28), heat being transferred from the solid material of one of the streams to the other in each heat adjustment zone (28). Forced gas circulation means (34) circulates a hot gas across the streams of solid material, transversely to the direction of stream movement, in each temperature adjustment zone, the solid material of one of the streams being cooled in each of the temperature adjustment zones, while the material of the other stream is heated therein.</p> |
