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Steam heated drying drum for paper mill has rising array of inner ribs from drum centreline to condensate collection gully at end-faces
Steam heated drying drum for paper mill has rising array of inner ribs from drum centreline to condensate collection gully at end-faces
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机译:蒸汽加热的造纸厂干燥鼓具有从鼓中心线到端面冷凝水收集槽内肋的上升阵列
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摘要
A paper mill has a steam-heated drying drum wall (1) has raised inner ribs (3) directed towards a condensate collection gully (5) near the drum end-face. The ribs are at least 1.2 times the height of the average condensate depth, and rise from the drum centreline towards the drum end-faces. The maximum rib height is ten times the average condensate depth. The change in rob cross sectional area from the centreline to the drum end faces maintains a roughly uniform rate of heat energy transmission at all points on the drum inner face. The ribs may be formed by a series of nipples or pins in straight or spiral array.
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