| 摘要 |
Cylinder (20) for heat-treating rotates about a horizontal axis and is heated by a complement of internal stationary infrared burners (38) that extend all along the length of the cylinder, but only partway around the cylinder, forming gap. An exhaust manifold (34) extending along this cylinder in that gap is configured to prclude local accumulation of high temperature exhaust. The accurate extent of the burner(s) is proportioned for establishing a specified 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.
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