초록 ▼

Process and device for drying a material web which together with a backing belt alternately runs across heatable drying cylinders which are contacted by the material web and across guide rolls contacted by the backing belt. At the travel section of the material web from one drying cylinder to the ne

Process and device for drying a material web which together with a backing belt alternately runs across heatable drying cylinders which are contacted by the material web and across guide rolls contacted by the backing belt. At the travel section of the material web from one drying cylinder to the next, drying air is fed to the material web in relatively narrow blow zones. Located between the narrow blow zones are relatively wide steam release spaces from which the water vapor-laden drying air is removed.

대표청구항 ▼

Process for drying a material web comprising: passing the material web, along with a porous backing belt, alternately across contact zones on heatable rolls which are contacted by the material web and across the guide rolls which are contacted by the backing belt such that a free web surface exists

Process for drying a material web comprising: passing the material web, along with a porous backing belt, alternately across contact zones on heatable rolls which are contacted by the material web and across the guide rolls which are contacted by the backing belt such that a free web surface exists in a section of web travel contained between adjacent contact zones; supplying drying air from outside each contact zone to the free web surface in drying air blow zones which in the direction of web travel are relatively narrow, with the drying air blow zones alternating in the direction of web travel with steam release spaces which in the direction of web travel are relatively wide, with the ratio of the length of each drying air blow zone to the length of each steam release space being maximally 1/20, such that the material web outside the contact zones repeatedly and alternately passes by drying air blow zones and steam release spaces.