| 摘要 |
PCT No. PCT/SE92/00256 Sec. 371 Date Oct. 19, 1993 Sec. 102(e) Date Oct. 19, 1993 PCT Filed Apr. 21, 1992 PCT Pub. No. WO92/18693 PCT Pub. Date Oct. 29, 1992.A method and a device (1) to treat a paper web (12) by using air, which flows around and cools the infrared lamps (4), to impinge against the paper web and thereafter be removed. A glass plate (9), supported by a pair of glass holders (8), is used to shield the paper web from the infrared lamps. In order to improve the total efficiency and, in particularly, to achieve even and efficient drying of the paper web by using less energy, the cooling air outlets adjacent the glass holders are designed as adjustable width nozzles (19) to direct the heated air against the paper web. The nozzles extend across the entire width of the paper web and the cooling air is ejected from the nozzles at high speed thereby forming an air knife to tear apart the boundary layer of humid air which follows the paper web and subjects the paper web to a more intense heat treatment. |
