| 摘要 |
In a method and apparatus for the uniform drying of a continuous web, such as a sheet of paper or paperboard, a newly formed web of paper of wet cellulosic fibers and the necessary additives is initially directed through a press section where excessive water is squeezed from the web to reduce its moisture content to about 50-80 percent, by weight, for subsequent passage through a dryer section wherein the moisture content is further reduced to between 3 and 15 percent, depending on the quality of the paper being processed. The moisture content profile of the nearly dry web of paper is constantly monitored adjacent the discharge end of the dryer section for dry streaks which occasionally occur in the web. Moisture is added to the web upstream from and longitudinally aligned with the dry streaks when the web is relatively wet and has a moisture content of at least 25 percent to eliminate further dry streaks. |
