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    ESTIMATING RISK LEVEL IN AN AQUEOUS PROCESS
    2.
    发明申请
    ESTIMATING RISK LEVEL IN AN AQUEOUS PROCESS 有权

    公开(公告)号：US20220326685A1

    公开(公告)日：2022-10-13

    申请号：US17621086

    申请日：2020-06-17

    Applicant: KEMIRA OYJ

    Inventor： Iiris JOENSUU ,  Marjatta PIIRONEN

    IPC: G05B19/4155 ,  G01N21/64 ,  G01N33/34 ,  D21G9/00

    Abstract: Estimating or predicting runnability or end product quality risk level for a pulp or papermaking process is disclosed. The method includes measuring hydrophobicity values of samples originating from a same aqueous process stream. A hydrophobicity measurement signal is produced of measured hydrophobicity values as a function of time. A risk level is calculated for the process. At least one mathematical index is calculated based on the hydrophobicity measurement signal, and optionally based on the amount of particles in the sample, other property of the aqueous stream and/or production data. The mathematical index and optionally the amount of the particles, other property, and/or production data is used as a risk indicator input in the calculation. Based on the risk level calculated for the pulp or papermaking process, the runnability and/or end product quality risk level for the pulp or papermaking process is indicated.

    A CONTROLLER
    3.
    发明公开
    A CONTROLLER 审中-公开

    公开(公告)号：US20240103503A1

    公开(公告)日：2024-03-28

    申请号：US17769046

    申请日：2020-10-13

    Applicant: KEMIRA OYJ

    Inventor： Torsten HAVERINEN-NIELSEN ,  Marjatta PIIRONEN ,  Iiris JOENSUU ,  Vesa-Matti TIKKALA

    IPC: G05B19/418

    CPC classification number: G05B19/41885

    Abstract: The invention provides a control arrangement where the controller is arranged to drive the actuator utilizing automatically the explanation values. The control arrangement has a controller, which is arranged to drive an actuator. The control arrangement comprises also a setpoint controller, which is arranged to utilize deviations between explanation values of machine learning and normal explanation values of machine learning. The setpoint controller forms a setpoint value for the controller.

    PULP QUALITY MONITORING
    4.
    发明申请
    PULP QUALITY MONITORING 有权

    公开(公告)号：US20210156092A1

    公开(公告)日：2021-05-27

    申请号：US16627642

    申请日：2018-07-02

    Applicant: KEMIRA OYJ

    Inventor： Marjatta PIIRONEN ,  liris JOENSUU ,  Lari VÄHÄSALO

    IPC: D21H23/78 ,  D21H21/28

    Abstract: A method for monitoring hydrophobic particles contained in a pulp suspension, includes obtaining a sample from a pulp suspension or a filtrate of the pulp suspension. A fluorescent dye is added to the sample to stain particles in the sample. The sample is fractionated to obtain at least a first fraction and a second fraction, wherein the second fraction is a fiber fraction. The method includes for the obtained fractions, fluorescence emitted by the particles in the fractions, calculating an integral of the fluorescence measured for the fractions excluding the fiber fraction, and correlating the calculated integral of the fluorescence to the amount of acetone soluble material in the pulp suspension, and optionally measuring light scattering signal of the particles in at least first and second fractions.

    A METHOD AND SYSTEM FOR MONITORING A PROCESS
    6.
    发明公开
    A METHOD AND SYSTEM FOR MONITORING A PROCESS 审中-公开

    公开(公告)号：US20240103456A1

    公开(公告)日：2024-03-28

    申请号：US17769062

    申请日：2020-10-13

    Applicant: KEMIRA OYJ

    Inventor： Iiris JOENSUU ,  Marjatta PIIRONEN ,  Torsten HAVERINEN-NIELSEN ,  Vesa-Matti TIKKALA

    IPC: G05B13/02

    CPC classification number: G05B13/0265

    Abstract: The invention provides a way to monitor a process (1). The invention utilizes explanation values. A ML model of the process is created. The ML model utilizes measurements from the process as inputs to the ML model and forms model outputs. The inputs are classified to groups in the. The explanation values are calculated for each input indicating contribution of the input to the model output/s, and a sum of the explanation values for each group are calculated. The calculated sums are monitored, each sum indicating status of the group in question.

    A METHOD AND SYSTEM FOR DETERMINATION OF STARCH IN A SAMPLE
    8.
    发明申请
    A METHOD AND SYSTEM FOR DETERMINATION OF STARCH IN A SAMPLE 审中-公开

    公开(公告)号：US20200278293A1

    公开(公告)日：2020-09-03

    申请号：US16089841

    申请日：2017-03-24

    Applicant: KEMIRA OYJ

    Inventor： Lari VÄHÄSALO ,  Marjatta PIIRONEN ,  Iiris JOENSUU

    IPC: G01N21/53 ,  G01N15/14 ,  G01N21/59 ,  G01N33/34 ,  G01N21/84 ,  G01N21/77

    Abstract: In a starch concentration measurement, a liquid sample is conducted from a liquid sample such as pulp suspension or filtrate of a paper, board or tissue process. An iodine solution is added to the sample, and a light absorbance or transmittance of the sample is measured at a wavelength longer than about 650 nm, for example longer than about 700 nm. The measured absorbance or transmittance of the sample is converted into the starch concentration of the sample by a predefined correlation between a starch concentration and a light absorbance or transmittance.

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