| 摘要 |
<p>The object of the invention is an dryer in the dryer section (26) of a machine for treating or producing a web (12). This drying section (26) has, amongst other things, a burner assembly (10), wherein this burner assembly (10) is adapted to produce a flame (14) and exhaust gases (18). Either said flame (14) or the exhaust gases (18) or both are in direct contact with the web (12) to be dried. The flame (14) or the exhaust gases (18) or both cover the maximum width of the web (12) to be dried and this at a temperature exceeding 600°C, e.g. above 700°C, e.g. 800°C, preferably 1000°C and more. By applying such a high temperature to the web (12) to be dried, one achieves a large temperature difference, resulting in a better heat transfer. Considering the theoretical equation of heat transfer q<SUB>x</SUB> = k<SUB>x</SUB>. A<SUB>x</SUB>.DT<SUB>x</SUB>,it is evident that because of the large temperature difference, the dimensions of the system can be reduced and/or the efficiency of the drying process can be refined. A further advantage of the higher energy transfer is that the drying process is accelerated and that the web can pass the dryer at high speeds.</p> |
