Test model for forecasting the process water load

A simulation model is now available for testing purposes. It is a general model designed to “Forecast the process water load in a paper mill loop” for linerboard grades:

http://shpoint.ptspaper.de:8080/CSB-WPR

Anyone interested in using this model can familiarise themselves with the representative functionality and normal handling of a simulation tool. The model depicts the water circuit and effluent treatment plant of a typical paper mill that produces linerboard. It models a system comprising a stock preparation plant and one paper machine loop. The effluent treatment plant is designed as a combined aerobic-anaerobic plant.

It is possible to forecast in advance COD values and calcium concentrations at the paper machine and in the effluents on the PC with the aid of the simulation tool. During this process, the user can test the impact that the following options for action may have:

• Closure of water circuits as a result of fresh water savings
• Water loop separation by installing a thickener for the finished stock
• Countercurrent layout by using fresh water in the paper machine and discharging effluents from the stock preparation plant
• Recirculation of biologically treated water by integrating a biological treatment stage
• Dissolution of calcium carbonate