Wet End Management Based on On-Line Measurements and Control Solutions

Abstract

In order to manage the wet end chemistry on paper machines, our goal is to control sub-processes through which we can influence the entire wet end operation with maximum effect. The most important sub-processes are: consistency, ash, and chemistry.The management of these three main groups is based on on-line measurements and automatic control.This paper presents a new wet end management platform, a new analyzer. This new analyzer utilizes a modular structure and modern software. It is part of anew paper machine concept.The controls of this concept are feedback and feedforward solutions that control retention, consistencies, ash, and charge, resulting in a more stable wet end (30-80%), more uniform paper, and better runnability.