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    MEASUREMENT APPARATUS AND MEASUREMENT METHOD
    1.
    发明申请
    MEASUREMENT APPARATUS AND MEASUREMENT METHOD 有权

    公开(公告)号：US20220317051A1

    公开(公告)日：2022-10-06

    申请号：US17707532

    申请日：2022-03-29

    申请人： VALMET AUTOMATION OY

    发明人： Kari VEIKKOLAINEN ,  Marko TOSKALA ,  Markku MÄNTYLÄ

    IPC分类号： G01N21/86 ,  G01N23/083 ,  G01N23/16 ,  G01N21/59 ,  G01N21/31

    摘要： Measurement apparatus including an optical sensor, which performs repeatedly transmission measurements through moving sheet of paper or board at at least one wavelength band dominantly absorbed by water, at at least one wavelength band dominantly absorbed by cellulose. The apparatus also includes an X-ray sensor, which performs repeatedly transmission measurements through the moving sheet of paper or board with photons of electromagnetic radiation (1 keV to 10 keV). The apparatus comprises a data processing unit, which receives signals with information on intensities of the optical and X-ray radiations passed through the sheet from the optical sensor and the X-ray sensor, and determines, based on the information, all of the following of the moving sheet: the dry stuff content as a function of the cellulose mass per unit area of the sheet, water mass per unit area of the sheet and the ash mass per unit area of the sheet.

    Apparatus for collecting dust samples
    2.
    发明授权
    Apparatus for collecting dust samples 有权

    公开(公告)号：US11340145B2

    公开(公告)日：2022-05-24

    申请号：US17318266

    申请日：2021-05-12

    申请人： VALMET AUTOMATION OY

    发明人： Petri Janhunen ,  Ilkka Pyykkönen ,  Pasi Kärki ,  Timo Sirviö

    IPC分类号： G01N1/14 ,  G01N1/20 ,  G01N1/10

    摘要： The invention relates to an apparatus (100) for collecting dust samples. The apparatus comprises a piston (102) and a cylinder (110) for holding the piston with a body having a hole (108) extending through the body. The cylinder (110) has a first end (112), which is open, the first end of the cylinder being slanted such that underside (130) of the cylinder extends farther than upper side (132). A mechanism (114) moves the piston between inward and outward positions. The apparatus gathers dust flowing past the piston into the hole of the piston when the piston is in the outward position and moves the gathered dust by moving the piston into the inward position. An input feed (116) is configured to spread fluid through the hole filled with dust to flush the dust to an output feed (118).

    Measurement of elastic modulus of moving web
    3.
    发明申请
    Measurement of elastic modulus of moving web 有权

    公开(公告)号：US20210239583A1

    公开(公告)日：2021-08-05

    申请号：US17052537

    申请日：2019-04-24

    申请人： Valmet Automation Oy

    发明人： Markku Mäntylä ,  Jussi Graeffe ,  Anna-Leena Erkkilä

    IPC分类号： G01N3/20 ,  B65H23/04 ,  G01B11/16 ,  G01N33/34 ,  D21F1/48 ,  D21G9/00

    摘要： According to an example aspect of the present invention, there is provided a method, comprising: controlling suction with predetermined force in a known measurement area to a moving cardboard or paper web in a manufacturing process, detecting on-line measurement information on deviation of the moving cardboard or paper web in the manufacturing process caused by the suction with predetermined force in the known measurement area, and determining elastic modulus of the moving cardboard or paper web in the manufacturing process on the basis of the measured deviation.

    APPARATUS FOR AND METHOD OF MEASURING SUSPENSION FLOWING IN TUBE FRACTIONATOR
    4.
    发明申请
    APPARATUS FOR AND METHOD OF MEASURING SUSPENSION FLOWING IN TUBE FRACTIONATOR 有权

    公开(公告)号：US20210214893A1

    公开(公告)日：2021-07-15

    申请号：US17148822

    申请日：2021-01-14

    申请人： VALMET AUTOMATION OY

    发明人： Matti TÖRMÄNEN

    IPC分类号： D21G9/00

    摘要： An apparatus for measuring flowing suspension includes a radiation source that directs wave motion to the suspension, a flow causing particles of the suspension to be sorted by size. A measuring arrangement measures first values of a first parameter of the wave motion interacted with the suspension at a first wavelength band of the wave motion, and measures second values of at least one of the following: a second parameter of the wave motion interacted with the suspension, and the first parameter of the wave motion interacted with the suspension at a second wavelength band of the motion, the measurement of the first and second values being synchronized. The arrangement forms at least one comparison being configured to relate to one of the first and one of the second values, and forms a distribution with at least one of first values as a function of one of the comparisons.

    Method for controlling a recovery boiler
    5.
    发明授权
    Method for controlling a recovery boiler 有权

    公开(公告)号：US10655849B2

    公开(公告)日：2020-05-19

    申请号：US15997140

    申请日：2018-06-04

    申请人： Valmet Automation Oy

    发明人： Jarmo Mansikkasalo ,  Jukka Koskinen

    IPC分类号： F23B90/00 ,  F23J15/02 ,  F22G1/02 ,  F22G5/04 ,  F23G7/04 ,  F23J1/00 ,  F22D1/12 ,  D21C11/06 ,  D21C11/10 ,  D21C11/12

    摘要： The method in a recovery boiler comprises estimating the first melting temperature T0 of the fly ash depositing on heat transfer surfaces, the estimating being based on potassium (K) content of the fly ash; measuring or estimating the temperature Tss of superheated steam; evaluating a temperature difference TD1 between the first melting temperature T0 and the temperature Tss of the superheated steam, the temperature difference TD1 providing an estimate of the risk of corrosion; and selecting a control action for influencing the temperature difference TD1. Alternatively or additionally, the method comprises estimating the sticky temperature TSTK of the fly ash depositing on heat transfer surfaces, the estimating being based on potassium (K) and chlorine (Cl) contents of the fly ash; measuring or estimating the temperature TFG of the flue gases; evaluating a temperature difference TD2 between the sticky temperature TSTK and the temperature TFG of the flue gases; the temperature difference TD2 providing an estimate of the risk of plugging; and selecting a control action for influencing the temperature difference TD2.

    Apparatus for checking need for maintenance and viscometer
    6.
    发明授权
    Apparatus for checking need for maintenance and viscometer 有权

    公开(公告)号：US10429285B2

    公开(公告)日：2019-10-01

    申请号：US15452141

    申请日：2017-03-07

    申请人： VALMET AUTOMATION OY

    发明人： Lauri Uusivirta ,  Matti T. Mäkelä

    IPC分类号： G01N11/14 ,  G01N11/00 ,  G01N11/10

    摘要： An apparatus for checking a need for maintenance of a viscometer measuring consistency of suspension comprises a rigid rod and an elongated cavity in a measuring arm of the viscometer. The rigid rod is matched with the cavity for the rod to be movable in the cavity. The cavity is configured to become mismatched with respect to the rod in response to a bending of the measuring arm, the mismatch indicating a need for maintenance of the viscometer.

    Measurement apparatus and method
    7.
    发明授权
    Measurement apparatus and method 有权

    公开(公告)号：US10400392B2

    公开(公告)日：2019-09-03

    申请号：US14875055

    申请日：2015-10-05

    申请人： VALMET AUTOMATION OY

    发明人： Arvo Rahikkala ,  Kari Lampela

    IPC分类号： D21C9/10 ,  D21C9/02 ,  D21C9/14 ,  D21C9/12 ,  D21H21/32

    摘要： A bleaching apparatus comprises a measurement chamber has a first substance, the amount of the first substance in the measurement chamber being known. A dosing unit inputs a second substance to the measurement chamber for causing a chemical reaction between the first substance and the second substance, one of the first substance and the second substance being chlorine dioxide and another of the first substance and the second substance being filtered sample from pulp slurry of a pulp process. At least one sensor performs detection of a property known to depend on the chemical reaction between the first substance and the second substance as a function of time. A data processing unit determines chemical demand of chlorine dioxide for washing loss in a bleaching sub-process on the basis of at least one value in the detected property within a known period of time after the input of the second substance.