Predictive control system and method for brown washing treatment in pulp mills

    公开(公告)号:US12077911B2

    公开(公告)日:2024-09-03

    申请号:US17097957

    申请日:2020-11-13

    摘要: A system and method are provided for predictive control of brown stock treatment at a pulp mill. Various online sensors generate output signals representative of actual values for respective process characteristics, each of which are directly or indirectly affected by adjustments to corresponding process variables. A controller uses the output signals or associated measurement data to dynamically set target values for the process characteristics based on a predicted impact of control responses for corresponding process variables. The controller further generates control signals to actuators associated with the respective process variables based on detected variations between the respective actual values and target values. Exemplary brown stock washing control systems may optimize various types of brown stock washing configurations, including for example vacuum drum washers, compaction baffle washers, chemiwashers, direct displacement washers and wash presses. Cloud-based analytics and machine learning may also be implemented to improve the control algorithms over time.

    PROCESS FOR TREATING TERRESTRIAL-BASED AND MARINE-BASED BIOMASSES

    公开(公告)号:US20230357988A1

    公开(公告)日:2023-11-09

    申请号:US18220587

    申请日:2023-07-11

    申请人: GREENKEY LLC

    摘要: The present invention provides a process for biomasses. The process may include removing residual moisture from the biomass to provide dried biomass. The dried biomass may be subjected to a basic solution. The biomass may then be heated to a temperature of about 130° F. to about 150° F. for about 30 to 50 minutes. The biomass is then subjected to an oxidation agent for about 40 to 90 minutes. The biomass is then separated into a cellulosic pulp and an extract. The resulting pulp may then be subjected to the basic solution and oxidizing agent a second time. For the terrestrial-based biomasses, the resulting product may be separated into a cellulose rich dissolving grade pulp and an extract high in lignin. For the marine-based biomasses, the resulting product may be separated into a cellulosic-rich pulp and an extract high in sodium alginate.