| 摘要 |
The disclosed cylinder for heat-treating a web is rotatable about a horizontal axis and is heated by one or multiple stationary infrared burners that extend all along the length of the cylinder, but which are limited to an arcuate extent, establishing a maximum cylinder heat output when the burner(s) is (are) supplied with air-fuel mixture at their maximum rate. Reduction of the air-fuel supply rate over a wide range allows the cylinder heat output to be reduced as the web processing speed is reduced. When the burner is divided into segments, the temperature profile along the cylinder; i.e., across the width of the web, can be regulated to adjust the moisture profile of the web. An exhaust manifold within and along the cylinder is configured so as to avoid any local accumulation of high-temperature exhaust.
|
