Invista Process Measurement

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About Us

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Established in 1997, Invista-Sensors delivers ionic charge and optical low consistency measurement technologies tailored for the paper industry. Our Murrell Green factory provides; In-house manual machining, welding, material storage, fabrication, assembly and testing. We carry an extensive parts storage inventory and partner with local shipping companies to despatch or collect parts worldwide.

 Invista-Sensors

<h3>Application Experience</h3>Invista-Sensors, based in the UK, has supplied measurement sensors and systems for almost 30 years. We have covered many different applications throughout mills in Europe and North America. Invista started working with low consistency measurement but soon purchased streaming current technology and developed an on-line charge demand measurement. The combination of charge and consistency provides an early indication of changing machine conditions and is a key to machine stability. With experience from many cost-effective installations we can manage ; automated cleaning, simple calibration and easy maintenance.

Paper Process Applications

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For these <a target="_blank" rel="noopener noreferrer nofollow" href="https://www.invsens.com/Tissue">Tissue grades</a>, the pulp furnish, as well as the addition of strength additives and stickies control agents, can affect the charge level. The goal is to maintain the charge within an operational window to prevent it from shifting to a cationic state. A balanced charge level ensures optimal chemical efficiency and within-specification strength properties.

Tissue and Toweling

Accurately monitor moisture content in paper production to ensure optimal quality and reduce waste.

Inline Moisture Measurement

Comprehensive moisture profiling to detect variations across the paper web for process optimization.

Moisture Profiling Systems

Reliable basis weight measurement tools for maintaining paper density and strength standards.

Basis Weight Measurement

Local controller displays for operators and technical personnel indicate changing conditions in the wet end of the machine.

Visualization

Data communication using standard protocols to a mill DCS or PLC ;Modbus RTU, Modbus TCP/IP, Ethernet IP.CAN bus, MQTT and 4-20ma remote I/O

Data Communication

In addition to data communication stand alone systems can be provided to trend measurements for users. This allows corrective actions to be made faster and follow-up for later analysis using logged data.

Analysis and Optimization

Invista manufactures sensors and measurement systems for the Paperboard, Tissue and Specialty Industries.Our products are; simple to install, easy to use, are reliable and offer a cost-effective solution to improve process stability. Our in-house expertise ensures that these sensors provide a precise measurement that is repeatable over time.Our long-term customers range from small papermills to large volume producers. These realise full and continuing returns from our measurements. We have worked across a diverse range of applications as well as most paper grades with complete success.Our products continue to out-perform similar and more complex systems. Partner with us to innovate and elevate your productivity.

Process Measurement

On-line, sequenced measurement of dissolved streaming current featuring; automatic titration for charge demand and a flush-cleaning cycle. Used typically in the wet-end of a machine, machine operation is stabilised and material use is optimized.

Charge Demand

Process sample vessel with overflow and cleaning. Used as a sample separator for the charge meter, additional analytical probes can be fitted. The probes can provide a much wider view of process conditions for the optimization of the wet end

Sample Separator

The wet end monitor combines chemistry and process measurements for a view of retention and the variables effecting machine conditions.

WEM-i

Our Paper Process Measurement Solutions

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St. Helens Pulp and Paper Company Original Collection: Visual Instruction Department Lantern Slides Item Number: P217:set 053 020

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Our products help to raise productivity by allowing your process to work better, faster and more efficiently. Wet-end control schemes for; retention, basic chemistry, charge demand and water recovery 

We can provide a fast payback on an investment :<ul><li>Cut chemical over-use and stabilise wet-end chemistry.</li><li>Optimise chemical addition by grade and stabilise Retention.</li><li>Reduce the environmental impact</li></ul>

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Gather information on the application conditions to be sure that the sensor can measure within these limits. Avoids misunderstandings in the use of the system.

Application definition

Definition of process connections and service connections to each unit. Consideration of installation constraints and instrument/comms signal connection

Installation Supervision

Documentation for system operation, initial calibration. Lab checks against sample standards adjustment of titration concentration (+/- %error), zero point checks.

Commissioning / Start-up

Combined classroom training and hands-on maintenance training to cover the measurement concept and cleaning routine. Titrant refill and concentration adjustment for calibration to Lab. tests. Introduction to manuals and support documents.

Operational Training

Titrant concentration adjustment to set the number of pump doses against lab. tests (u.equiv/L). Software scaling of results to further adjust the calibration. Zero offset and gain adjustment are also available.

Calibration follow-up

Simple maintenance of system parts with the option of modular service exchange. Supply of parts as required.

Troubleshooting & service

Support Service

<h4>On-line CD titration system:</h4><ul><li>Core Function: Real-time, sequenced online dissolved streaming current measurement featuring automatic titration for charge demand and a flush-cleaning cycle.</li><li>Design &amp; Maintenance: Modular construction enables easy servicing and individual parts replacement.</li><li>Calibration Method: Utilizes a zero-point test combined with titrant concentration adjustments.</li><li>Operational Efficiency: Requires a minimal service interval of once per month for cleaning and titrant refilling, maximizing continuous measurement uptime.</li></ul>

ionTEK Charge Demand

<h4>Sample Separator Vessel</h4><ul><li>Receipt &amp; Overflow: Accepts the incoming process sample and safely diverts any excess volume to a drain.</li><li>Settling Phase: A timer pauses the process sample flow to allow it to separate into distinct layers.</li><li>Transfer: A transfer pump draws the clarified sample out of the vessel and into the reactor.</li><li>Cleaning: Along with auto-flushing the vessel is easily opened to clean and service.</li><li>Process Measurements:The vessel mounts:</li><li>pH probe (pH4 to 10)</li><li>ORP/Redox (-1,250mv to 1,250mv)</li><li>Conducivity - Toroidal (0 to 10,000 uSM)</li><li>Consistency/Solids (0 to 0.5%Cs/5,000mg/L) Polarized.</li></ul>

Process Separator

<h4>Consistency/Solids Sensors</h4><ul><li>Polarized Optics: Compensation for changing filler or fines content as well as grade specific calibration</li><li>Auto-Cleaning Cleaning by actuated flush or brush</li><li>Immersion probe Rod-type sensor with custom mounting typically used to measure drain solids losses</li><li>Bypass probe Diverted sample flow through the sensor with flush and actuated brush cleaner.</li><li>Insertion probe Direct mount into a vessel or process line with flush cleaning.</li><li>Optical Measurement Typical optics of; 5 15, 20 and 40mm from higher consistency to ultra-low solids</li></ul>

Optical Solids Sensor AC100

Bypass flow polarized optical transmission sensor with cleaning and optional multi-sample connections.

Optical %Cs Sensor AC300

In-line mounted consistency sensor (1 - 6%Cs) for thickstock applications. Use of an industry standard mounting clamp and an internal water flush channel

Optical %Cs Sensor AC500

Touch color display with built-in controller to run ; measurement sequences, control logic, sensor measurement interface, analog signal ouput as well as comms to mill DCS

Signal Processor

To maximise output, the process runs at an elevated process temperature and functional chemical performance can be effected. A combination of <a target="_blank" rel="noopener noreferrer nofollow" href="https://www.invsens.com/Paperboard">tray solids measurement and background chemistry (charge)</a> allows the wet end to be stabilized and efficiency raised. Headbox consistency measurement gives an indication of retention and the operation of thinstock consistency within limits.

Linerboard and Fluting

Characterized by small order runs, grade changes and added value grades, <a target="_blank" rel="noopener noreferrer nofollow" href="https://WWW.INVSENS.COM/FinePaper">Fine paper</a> qualities rely on functional chemistry to meet tight order specifications. Added value grades can be difficult to achieve without a continuous measurement of retention and charge conditions. Specialty and Multi-Ply Board grades also benefit from these wet end measurements.

Fine, Specialty & Multi-ply Board Grades

Comprehensive evaluation of paper production processes to minimize environmental footprint and improve sustainability.

Environmental Impact Assessment

Seamless integration of measurement sensors with existing automation and control systems for streamlined operations.

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Integration with Automation Systems

Leveraging big data to optimize paper process efficiency and quality through predictive analytics and real-time monitoring.

Advanced Data Analytics

Measurement of drain solids levels and the prevention of losses at source. Water recovery processes within the mill building remove solids (screens and air flotation devices) The measurement of changing loads to the effluent primary clarifier allows technical personnel to respond using treatment routines.

Influent Load

For Aerobic and/or Anaerobic treatment processes the water is monitored to determine the correct treatment. Polymers (single or multi additives) can be regulated to remove solids to and across clarification before discharge to sewer or the river.

Effluent Treatment

Effluent outflow at low and ultra-low total solids levels. At this location auto-cleaning is essential to prevent dirt build-up. An early indication of increasing solids levels allows technical staff to respond to a disturbance.

Environmental

Water Recovery and Treatment

Invista Limited 23 Murrell Green Busn Park, London Road, Hook, Hampshire UK RG27 9GR