Customer: Hamburger Rieger
Supplier: Voith
Description: Hamburger Rieger has engaged Voith to supply the complete stock preparation unit for its new PM2 in Spremberg, Germany. Voith will deliver three separate stock preparation lines with a total capacity of 2,450 metric tons per day. Meri Environmental Solutions responsible for the complete reject and water treatment facility. The key to the stock preparation concept is the OnEfficiency.DIP (deinked pulp: recycled waste paper without color residues) system from Voith, which has already proven effective for the manufacture of graphic papers based on recovered paper. The efficiency concept is now being used for the first time in the production of packaging papers. In the stock preparation unit of the new PM 2, ultra-modern sensors and actuators ensure consistent raw material quality and low running costs.
Details: The system consists of two DIP yield control modules, two DIP bleach control modules and a DIP optimizer. The DIP yield control module uses online sensors to measure the ash content and whiteness of the DIP stock. Using actuators, the flotation technology automatically adjusts it as necessary to obtain the required degree of whiteness. The DIP bleach control module also measures the whiteness before and after a bleaching step. If necessary, actuators also regulate the flow of chemical additives here as well. The control modules are connected with the DIP optimizer, which defines optimum target values based on the optimization of running costs. The cost model takes account of relevant parameters such as energy, raw material and chemicals. This dynamic interaction between the individual components reduces quality fluctuations, which occur thanks to the heterogeneity of the raw material or production adjustments. This at the same time improves production costs.