| 摘要 |
<p>A method and a device (1) respectively designed to treat a paper web (12) by using heat radiation from infrared lamps (4) and cooling air, which flows around these lamps and against the paper web, glass plates (9) being used to shield the paper web from the infrared lamps and inserted in glass holders (8), in connection with which the cooling air is ejected against the paper web and is sucked off again. In order to improve the total efficiency, particularly as to an even and efficient drying of the paper web without using more but rather less energy the cooling air ejection holes adjacent the glass holders are designed as nozzles (19) directed against the paper web and having a steplessly adjustable gap width. The gap extends across all the width of the paper web and the cooling air is ejected from it with a high speed, forming a knife to tear apart the boundary layer of humid air which follows the paper web and subject the paper web to more intense heat treatment and a removal of additional parts of said boundary layer, when the paper web leaves the treatment area respectively.</p> |
