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公开(公告)号：US20220326685A1
公开(公告)日：2022-10-13
申请号：US17621086
申请日：2020-06-17
申请人： KEMIRA OYJ
发明人： Iiris JOENSUU , Marjatta PIIRONEN
IPC分类号： G05B19/4155 , G01N21/64 , G01N33/34 , D21G9/00
摘要： 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.
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公开(公告)号：US20240103456A1
公开(公告)日：2024-03-28
申请号：US17769062
申请日：2020-10-13
申请人： KEMIRA OYJ
IPC分类号： G05B13/02
CPC分类号： G05B13/0265
摘要： 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.
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3.发明公开公开(公告)号：US20240092668A1
公开(公告)日：2024-03-21
申请号：US18527492
申请日：2023-12-04
申请人： KEMIRA OYJ
CPC分类号： C02F9/00 , B01D65/02 , B01D65/08 , C02F1/24 , C02F1/281 , C02F1/44 , C02F1/5209 , C02F2103/32
摘要： In a water treatment system, a pretreatment chemical is added to water stream in a pretreatment process including a coagulation, flocculation and separation to reduce amount of dissolved and/or particulate matter in the water stream. Hydrophobic conditions in the water stream are monitored upstream or downstream from adding the pretreatment chemicals. Dosing of the pretreatment chemical to the water stream is controlled based on the monitored hydrophobic conditions. Thereby a membrane fouling in subsequent membrane filtration stage can be minimized.
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公开(公告)号：US20240103503A1
公开(公告)日：2024-03-28
申请号：US17769046
申请日：2020-10-13
申请人： KEMIRA OYJ
IPC分类号： G05B19/418
CPC分类号： G05B19/41885
摘要： 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.
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公开(公告)号：US20210156092A1
公开(公告)日：2021-05-27
申请号：US16627642
申请日：2018-07-02
申请人： KEMIRA OYJ
发明人： Marjatta PIIRONEN , liris JOENSUU , Lari VÄHÄSALO
摘要： 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.
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公开(公告)号：US20200278293A1
公开(公告)日：2020-09-03
申请号：US16089841
申请日：2017-03-24
申请人： KEMIRA OYJ
发明人： Lari VÄHÄSALO , Marjatta PIIRONEN , Iiris JOENSUU
摘要： 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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7.发明申请公开(公告)号：US20200048126A1
公开(公告)日：2020-02-13
申请号：US16339920
申请日：2017-10-06
申请人： KEMIRA OYJ
摘要： In a water treatment system, a pretreatment chemical is added to water stream in a pretreatment process including a coagulation, flocculation and separation to reduce amount of dissolved and/or particulate matter in the water stream. Hydrophobic conditions in the water stream are monitored upstream or downstream from adding the pretreatment chemicals. Dosing of the pretreatment chemical to the water stream is controlled based on the monitored hydrophobic conditions. Thereby a membrane fouling in subsequent membrane filtration stage can be minimized.
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公开(公告)号：US20190002304A1
公开(公告)日：2019-01-03
申请号：US16065515
申请日：2016-12-21
申请人： KEMIRA OYJ
摘要： A method and apparatus for monitoring deposit formation in a process having an aqueous flow is provided. According to exemplary embodiments, a feed flow of an aqueous liquid is provided onto a receiving surface to be monitored. At least part of a receiving surface is illuminated with at least one light source. Visual data is collected across the receiving surface and analyzed. The quality and type of deposition attached to the receiving surface is classified based on information obtained from the analyzed visual data, and a quantitative scaling and/or fouling indication is computed based on the classification.
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公开(公告)号：US20240103507A1
公开(公告)日：2024-03-28
申请号：US17769053
申请日：2020-10-13
申请人： KEMIRA OYJ
IPC分类号： G05B23/02
CPC分类号： G05B23/024
摘要： The invention provides a diagnostic arrangement, which utilizes pre-processed measurement data, ML values and explanation values. By using all these values/data it is possible to analyse phenomenon, events, and behaviour of the process in such a way that a number of aspects can be taken into account.
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公开(公告)号：US20230287629A1
公开(公告)日：2023-09-14
申请号：US18319521
申请日：2023-05-18
申请人： KEMIRA OYJ
发明人： Marjatta PIIRONEN , Iiris JOENSUU , Lari VÄHÄSALO
摘要： 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.
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