公开(公告)号：US20250122668A1

公开(公告)日：2025-04-17

申请号：US18488789

申请日：2023-10-17

Applicant: Andritz Inc.

Inventor： Richard Van Fleet ,  Ilpo Märkjärvi

IPC: D21C9/10 ,  D21C9/16 ,  D21G9/00 ,  G06F30/20

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for determining and applying a distribution of oxidizing agents in delignification of a pulp bleaching cycle. The method obtains an incoming kappa value of an unbleached pulp slurry and a target kappa value expected for a bleached pulp slurry. A model generates a sequence kappa factor based on these values, and a total equivalent chlorine (TEC) factor from the sequence kappa factor and the incoming kappa value. Scenarios are simulated using the TEC factor, each scenario specifying a unique distribution of dosage targets for oxidizing agents and having a total consumption score for the oxidizing agents that is determined based on the dosage targets for the oxidizing agents. A scenario with the lowest total consumption score is selected, and the model applies the dosage targets of oxidizing agents for the selected scenario during the pulp bleaching cycle.