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    Retention Measurement

    Uploaded by

    Pedro Castro
    KPM offers a retention measurement system for paper machines that measures consistency in the headbox and whitewater to monitor and control paper retention. The system includes sensors connected to the headbox and whitewater via sample lines. The sensors measure total consistency from 0.01-1.5% and transmit signals to the DCS for calculation of retention. The sensors require no maintenance as they have a self-cleaning design and can be equipped with automatic flushing. The system provides robust sensors constructed of stainless steel suitable for withstanding difficult process conditions.

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    © All Rights Reserved
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    Retention Measurement

    Uploaded by

    Pedro Castro
    10 views2 pages
    KPM offers a retention measurement system for paper machines that measures consistency in the headbox and whitewater to monitor and control paper retention. The system includes sensors connected to the headbox and whitewater via sample lines. The sensors measure total consistency from 0.01-1.5% and transmit signals to the DCS for calculation of retention. The sensors require no maintenance as they have a self-cleaning design and can be equipped with automatic flushing. The system provides robust sensors constructed of stainless steel suitable for withstanding difficult process conditions.

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    RETENTION MEASUREMENT

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    RETENTION MEASUREMENT

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    KPM offers a retention measurement system for paper machines that measures consistency in the headbox and whitewater to monitor and control paper retention. The system includes sensors connected to the headbox and whitewater via sample lines. The sensors measure total consistency from 0.01-1.5% and transmit signals to the DCS for calculation of retention. The sensors require no maintenance as they have a self-cleaning design and can be equipped with automatic flushing. The system provides robust sensors constructed of stainless steel suitable for withstanding difficult process conditions.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    10 views2 pages

    Retention Measurement

    Uploaded by

    Pedro Castro
    KPM offers a retention measurement system for paper machines that measures consistency in the headbox and whitewater to monitor and control paper retention. The system includes sensors connected to the headbox and whitewater via sample lines. The sensors measure total consistency from 0.01-1.5% and transmit signals to the DCS for calculation of retention. The sensors require no maintenance as they have a self-cleaning design and can be equipped with automatic flushing. The system provides robust sensors constructed of stainless steel suitable for withstanding difficult process conditions.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
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    KRT RETENTION MEASUREMENT

    Retention measurement system


    for monitoring and control
    KPM offers a retention measurement system for
    paper machine retention monitoring and control.
    KPM KRT retention package is applicable for
    paper and board machines with or without ash
    addition.
    All needed hardware is included in the system
    where separate configuration for headbox and
    whitewater measurements are available. KPM
    KRT retention package measures total consistency
    of the headbox and whitewater sample.
    Measurement range is 0–1.5% Cs. The
    sensor measures fibers and particles from 0.01%
    (100ppm) to 1.5%, (depending on type of stock).
    The measuring principle is based on the ability
    of fibers to depolarize light to a much greater
    degree than denser solid particles.

    Connection to headbox and whitewater


    KPM KRT by-pass sensors are connected to the
    headbox and the whitewater with sample valve
    and PP sample line. The whitewater sensor
    includes an automatic backflush valve that keeps
    the sensor and sample line clean. The whitewater
    sensor can also be equipped with a deaeration
    device and a sample pump.
    The sensors measure total consistency of the
    sample and the consistency signals are
    connected to DCS, where retention is calculated.

    No maintenance needed
    The sensor has a 3 mm gap between the lenses,
    which produces a self-cleaning effect due to the
    increased velocity. In addition, automatic flushing
    with 3-way valves can be supplied to keep the
    sensors clean without maintenance. Each sensor
    can have four remotely selectable calibration
    curves for applications with varying furnishes.

    Robust design in SS316 steel


    The sensor is constructed of 316SS with
    unbreakable stainless steel sample funnel, making
    the sensors withstand the most aggressive
    media. The sensor pressure class is PN10.
    The display unit and sensor have protection class
    of IP65 (Nema 4X) and do not need protective
    housing to stand difficult conditions at the paper
    machine wet end.
    Output signal 4 - 20 mA
    Binary inputs 5 binary inputs 24 VDC, process stop, Inverter alarm, sampling and 2 for remote
    calibration selection
    Binary output 3 relay outputs for alarm, flushing control and pump, Max 110VAC or 24VDC, 2 A
    Total Consistency range 0 – 1.5 %
    Process temperature 10 – 60 °C (50 – 140 °F)
    Process pressure max 10 Bar (140 psi)
    Sample flow rate minimum 10 l/min (2.5gmp)
    Pressure Class PN10 (150 psi)
    Process Connection sample tab 3/4 in
    Minimum consistency 0.01 %, 10 ppm
    Ambient temperature Sensor, 0 - 60°C (32 - 129°C )
    Cabling 10 m interconnect cable from Sensor to Display Unit; max 5 cables in series
    Wetted materials 316 SS
    Flushing water temperature 25 – 60 °C (77 – 129°F)
    Flushing water pressure 2 – 6 Bar (30 – 90 psi)
    Instrument air 4 – 8 Bar (60 – 120 psi)
    Conformance 73/23/EEC, 89/336/EEC, EN 61000-6-4:2001, EN 61000-6-2:2001, EN 61010-1:2001
    Enclosure class IP65, Nema 4X
    Power supply 85–250 VAC, 50/60Hz; 20VA

    Dimensions Weight
    HB sensor 850 x 1250 x 550 mm (33 x 50 x 22 in) 23 kg (110 lbs)
    WW sensor 850 x 1250 x 550 mm (33 x 50 x 22 in) 50 kg (110 lbs)

    www.prokajaani.com

    KAJAANI PROCESS MEASUREMENTS Ltd., Kettukalliontie 9 E, FIN-87100 Kajaani, FINLAND. Phone: +358 10 548 7600. Fax: +358 8 612 0683. E-mail: kpm@prokajaani.com
    KPM products comprise applications for consistency control, sampling and sheet break detection – and represent the most progressive solutions of the field. All prod-
    ucts are supported by KPM and Lorentzen & Wettre global network of sales and support and of course expert consultancy services. KPM is a part of the ABB Process
    Automation division.

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