| 摘要 |
<p>The present invention relates to a method of controlling the absolute humidity of blown air in a roasting-and-drying process and a roasting-and-drying apparatus. The method makes humidity control for air blown through malt to be proper and makes the variation in the degree of drying to be decreased in the roasting-and-drying process for producing malt. In the process for roasting and drying a malt raw material, outside air introduced toward a malt layer 10 provided by heaping the malt raw material is heated and is fed to the malt raw material as the blown air. A portion of air passing through the malt raw material as circulated air is mixed with the outside air and is fed to the malt raw material as the blown air again. The absolute humidity of the blown air fed to the malt raw material is measured using a sensor 20, and the mixing ratio of the introduced outside air and the circulated air is controlled so that the measured absolute humidity is kept at a predetermined value.</p> |
