Abstract
Production of pulp from wood is a significant industrial
activity in Finland. In 2015, more than 7 million tonnes
of pulp was produced in Finland. Important pulp quality
parameters include brightness, dirt level, fibre length
distribution, and the potential of forming strong and
even fibre network. On-line measurements for the first
three are available, but the fourth one related to
bonding and fibre strength can only be measured in
laboratory. In laboratory analyses, the pulp sample is
first refined, then made into a paper sheet, dried, and
finally measured. This takes time and incurs expenses,
both factors limiting the number of analyses that can be
carried out. Furthermore, laboratory analyses have been
found to include a level of measurement noise that is not
small enough in relation to the actual quality variation
of pulp. All these factors together make the laboratory
analyses less than ideal for pertinent quality control.
A new on-line measure of pulp quality was developed and
named Botnia FOX. Evident connections have been
demonstrated between Botnia FOX and paper/board machine
operation. Depending on the control strategy of each
paper/board machine, e.g. whether pulp is refined to
constant freeness or with constant specific energy
consumption, the connections have been observed in one or
more parameters like pulp consumption, paper/board
machine runnability, energy consumption, and quality
variables of the produced paper.
Original language | English |
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Number of pages | 2 |
Publication status | Published - 2017 |
Event | Automaatiopäivät22 - Vaasa, Finland Duration: 23 Mar 2017 → 24 Mar 2017 |
Seminar
Seminar | Automaatiopäivät22 |
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Country/Territory | Finland |
City | Vaasa |
Period | 23/03/17 → 24/03/17 |
Keywords
- pulp manufacturing
- quality
- industrial internet