Method and apparatus for controlling the drying process in a drying section of a paper machine or the like
US6792331B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 2001 |
| Grant date | Sep 14, 2004 |
| Priority date | — |
| Expiry date | May 29, 2021 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21F5/00
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for controlling the drying process taking place in the dryer section of a paper machine or the like. The total drying efficiency required in the dryer section is first calculated by means of a method known as such, and an optimal drying efficiency distribution is compiled. Using the optimal drying efficiency distribution, the dryer section is divided into two or more imaginary drying segments which differ in their drying action, in at least one of which segments there are at least two dryer units using different forms of energy and/or at least two separately adjustable dryer units using the same form of energy. The total drying efficiency obtained is divided, by means of an optimization method known as such, between the said different drying segments in such a way that a good drying efficiency distribution is achieved in terms of the quality of the web being dried.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.