Proceedings of the Korea Technical Association of the Pulp and Paper Industry Conference (한국펄프종이공학회:학술대회논문집)
- 1999.11b
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- Pages.130-139
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- 1999
WET END MANAGEMENT BASED ON ON-LINE MEASUREMENTS AND CONTROL SOLUTIONS
- Timo Rantala (Valmet Automation Kajaani Inc.) ;
- Martti Artama (Valmet Automation Kajaani Inc.) ;
- Jukka Nokelainen (Valmet Automation Kajaani Inc.) ;
- Taina Sopenlehto (Valmet Automation Kajaani Inc.)
- Published : 1999.11.01
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 operations 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 maesurements and automatic control. This paper presents a new wet end management platform, a new analyzer. This new analyzer utilizes a modular structure and modem software. It is part of a new 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 rnnability.