The wrong choice of screening concept or operation of obsolete systems appear to be the main causes of the poor results in the ScreenFit Compass 2011. To counter those poor results, Voith Paper offers its C-bar screen basket line, which continues to be enhanced with ongoing innovations. Over the past few years, the relationship between screen basket size and screen surface has constantly increased with C-bar family baskets while slot widths have stayed constant. As the latest screen baskets get smaller in size, production capacity increases, and screens once operated in parallel can be switched off. Investment and operating costs can thus be substantially reduced.
Along with the right choice of screen baskets and rotors that match them (e.g., the MultiFoil rotor), stock consistency and the interconnection of the individual screening stages contribute considerably to specific energy consumption. For this reason, modern Voith stock preparation concepts aim at increasing stock consistency and improving the relation between energy input and screening efficiency.
The compact design of the new screening systems reduces the size of the stock preparation, which in turn leads to lower investment costs. However, choosing the right screen basket depends not only on open screen surface but also on stock parameters, such as fiber length.