Abstract
By using new types of optical sensors combined with intelligent signal treatment it becomes possible to measure total solids and filler content in a furnish sample. With this information, first pass total and filler retention can be calculated. The level of accuracy is high; 95% of all figures are within plus minus 5% based on the measurement range (laboratory determination is used as the reference). Mill experience on the system will be discussed. The sensitivity of the measurement to paper machine dynamics is illustrated. In one case, a mill has closed the control loop. The flow of one of the retention aid components is automatically adjusted to keep the white water solids content constant.
| Original language | English |
|---|---|
| Pages (from-to) | 169-177 |
| Number of pages | 9 |
| Journal | Papermakers Conference, Proceedings of the Technical Association of the Pulp and Paper Industry |
| State | Published - 1987 |
| Externally published | Yes |