| 摘要 |
The process to optimize the dosing of paper web waste material into the paper prodn. process, as a suspension or as fibers, separates a part-flow (2) from the main flow (1) of returned material. The vols. are measured in the main and part-flow, the clouding of the part-flow is determined (3) and, downstream, the returned material is added by various amounts at times. The clouding is established and the optimum dosing rate is set by an electronic unit (4) according to the clouding change, to be taken in relation to the mass or vol. flow of the main flow. The material density is measured in the part-flow. The addition of the dosing medium into the part-flow is varied in a sawtooth or sine wave pattern by time, at pref. intervals of 20-300 secs. or 60-180 secs. The dosing into the main flow is at 90-99% of the established ideal value. |
