公开(公告)号：US5291666A

公开(公告)日：1994-03-08

申请号：US52441

申请日：1993-04-23

申请人： Vladislva A. Babinsky ,  Warren G. Mumford

发明人： Vladislva A. Babinsky ,  Warren G. Mumford

IPC分类号： D21F5/04 ,  F26B13/08 ,  F26B13/10 ,  F26B7/00

CPC分类号： D21F5/048 ,  D21F5/04 ,  F26B13/08 ,  F26B13/105

摘要： An apparatus for drying a web of roll material has two rows of comparatively low and high temperature cylinders, and a metal belt and a felt belt entrained in parallel for transporting the web on a serpentine path around the cylinders. The metal belt is pre-heated at an input side to each low temperature cylinder to a temperature from 140.degree. C. to 170.degree. C. An input press roll applies a nip pressure to the metal belt against the web, felt belt, and low temperature cylinder from 60 to 200 pli (pounds per linear inch). The surface of the low temperature cylinder is heated to an intermediate temperature from 100.degree. C. to 140.degree. C. The temperature of the heated belt at an input side is maintained only about 20.degree. C. higher than that of the low temperature cylinder. The low temperature cylinder has air pressure grooves for maintaining a negative air pressure in the range of 0.1 to 0.7 bar at its surface for lowering the vapor pressure for water evaporated from the web. A uniform drying and densification of the web is obtained, without excessive buildup of web pressure or breaking or delamination of the web.

摘要翻译： 用于干燥辊材料的卷材的装置具有两排相对较低和高温的气瓶，并且金属带和毡带平行夹带以便在围绕气缸的蛇形路径上运送幅材。 将金属带在每个低温气缸的输入侧预加热至140摄氏度至170摄氏度的温度。输入压辊将金属带施加在金属带上以抵抗腹板，毡带和低压 温度圆筒从60到200平方厘米（磅/线性英寸）。 将低温圆筒的表面加热到100℃至140℃的中间温度。输入侧的加热带的温度比低温圆筒的温度保持高约20℃。 低温气缸具有空气压力槽，用于在其表面上将负气压保持在0.1至0.7巴的范围内，以降低从腹板蒸发的水的蒸气压。 获得幅材的均匀干燥和致密化，而不会过度堆积网幅压力或网片的断裂或分层。