Recently, Toscotec has fully redesigned its TAD machine to achieve superior tissue properties (primarily bulk and absorbency) and outstanding results in energy consumption.
Drawing on the experience of its successful installation in the U.S. market in 2004, the new TADVISION® machine ensures highly improved runnability and machine efficiency.
Toscotec’s design fully exploits the specific features of the Through Air Drying process, in order to capitalize on its unparalleled paper quality. The drying process of the TAD section is by nature very uneven and depends on the fiber web’s moisture content and consequent air permeability, because the hot airflow tends to penetrate more and therefore better dry the areas with lower water content and higher permeability.
Excellence in technology at the service of the paper industry
TADVISION® ensures optimal Through Air Drying uniformity on its longer drying path, along which the paper goes throughout a unique serpentine TAD section, composed of three or five TAD drums. Because of the straight flow crossing the drums and the fiber web, the paper dries out in a uniform manner, to a level of dryness in the range of 75% to 90%, and it turns out to be perfectly structured by the full penetration of hot air going through the TAD drums. Thanks to its vertical, down-to-top airflow design, TADVISION® ensures that the air fully flows though the drums, thereby avoiding any problem connected with the deviation of incoming or outgoing flow in the drum’s axial direction. Toscotec’s detailed computational fluid dynamic analysis ensures a highly optimized airflow in the air-system ducts leading to the TAD section and Yankee hoods, in order to guarantee the expected uniformity of drying. An accurate moisture control in the TAD section contributes to deliver top dryness results.
Overall, TADVISION® ensures a more effective use of energy, bringing consumption down to 4.5-5.5 MWh/ton, a significant decrease compared to the consumption of current TAD machines, which is estimated in the range of 6.0-7.5 MWh/ton. Toscotec is continuing its energy reduction program and is committed to further reducing the overall consumption to less than 4.5 MWh/ton for a plant of the same production capability over the next few years.
Toscotec’s Tissue Division handles design and process engineering for complete plants or individual plant sections