Pulp and Paper industry-sensors
- 1. PULP AND PAPER INDUSTRY A report on Process Control Management Prepared by: -ALLYSA ALMAGRO -DANIEL VILLARAMA -JOHN PATRICK BOGNOT
- 2. The process of paper making from raw materials to paper itself
- 4. SENSORS USED IN A PULP AND PAPER INDUSTRY ARE CLASSIFIED AS: 1. Temperature sensors 2. Pressure sensors 3. Flow meters 4. Level sensors 5. Physical composition sensors The following diagram shows the sensors used in each equipment and processes… Editor’s Note: For better reviewing, click the circle from which the name of the sensor appears, the name of the sensor, its uses, and description are all listed out.
- 5. Filtrate conductivity monitor pH meter Pulp slurry flow meter Pulp slurry flow meter Adhesive fluid meter Adhesive fluid meter Adhesive fluid meter Adhesive fluid meter Adhesive fluid meter Adhesive fluid meter Pressure transmitter Pressure transmitter Density control Magnetic Flow meter Magnetic Flow meter Single loop controller Temperature transmitter Temperature transmitter Temperature transmitter Temperature transmitter Float switch Float switch Float switch Float switch Float switch
- 6. ISC202G (& Peek Sensor) Inductive Conductivity Transmitter -polyetheretherketone (PEEK) that provides abrasion and corrosion resistance. -Used to monitor the conductivity of filtrate in the washer -High conductivity of filtrate leads to deposit of undesired matters therefore maintaining the conductivity of the filtrate is a must -Conductivity should be monitored to avoid the clogging of black liquor BENEFITS: -This sensor has wide measurement span -This have fast response -Low maintenance of cost and time BACK
- 7. PH202G (& Chemical sensor) pH Transmitter Problems in the industry: -Excessive Cl2O weaken paper intensity -Existing residual Chlorine deteriorate the electrode Why use this sensor: -Has Special anti-corrosive glass membrane -Has Special anti-corrosive structure of Ag ion trap Benefits: -High accuracy to improve paper intensity -Low maintenance cost and time BACK
- 8. Pulp Slurry Flow Meter Problems in the industry: -Slurry noise in the digester means that pulp slurry are 10% -Pulp slurry should be avoided in digesting because it makes the paper bulky -Pulp slurry indicates the presence of high abrasive fluid or solid material in the mixture Why use this sensor: -Has Dual frequency excitation -Has Standard high frequency 75 Hz -Has Optional high frequency 160 Hz -Has Ceramics lined AXF -Has PFA Lined AXF with metal hat earth-ring Benefits: -Stable and accurate measurement under aggressive slurry -Leak-free ceramic liner construction -Longer life-time by robust design BACK
- 9. Adhesive Fluid Meter -Measures flow rate Problems in the industry: -Adhesive chemicals -Wood resin adhesion -Dye adhesion Why use this sensor: -Mirror finished AXF (Ceramics lining, perfluoroalkoxy (PFA) lining) -has Predictive electrode coating -has Diagnostics function perfluoroalkoxy BACK
- 10. Magnetic Flow Meter -Measures flow rate -Magnetic Flow Meters measure flow volume with Faraday's law. The frequency of excitation current given to coils affects in the measurement accuracy and response time. BENEFITS: -Best-in-class performance with dual frequency excitation method -Predictive electrodes adhesion diagnostics -Variety of liners & electrode materials -Fieldbus communication capability BACK
- 11. DPharp EJA/EJX Series (Pressure Transmitter) -Pressure Transmitter (for dryers and headbox) -Best installed performance Compact and rugged design Multi-sensing digital sensor SIL2 as standard (EJX) Fieldbus communication capability Pressure CONTROLBACK
- 12. YTA Series (Temperature Transmitter) -Temperature Transmitter (for pipes, blowtanks, digester and dryers) -High resolution, high stability and high versatility -Dual compartment housing for harsh environments -SIL2 safety as standard feature -Fieldbus communication capability Temperature CONTROL BACK
- 13. TUFFY®II SIDE-MOUNTED FLOAT SWITCH The Tuffy® II Buoyancy Level Switches are float-actuated devices designed for horizontal mounting in a tank or vessel through threaded or flanged pipe connections. The compact size allows for installation in small vessels, while its many features provide a variety of application uses. -Operating Principle The TUFFY II achieves switching action through the use of repelling magnets on the float assembly and the switch mechanism. Separating the two magnets is a nonmagnetic pressure barrier. The float follows the liquid level as it changes, causing the attached float magnet to move into the field of the switch magnet. The like poles of these magnets repel each other causing the switch magnet to change position, actuating the switch. BACK
- 14. YS100 series (SINGLE LOOP CONTROLLER) Single loop controllers receive temperature, flow rate, pressure, and other types of measurement readings from sensors and send corresponding instructions to control elements such as valves in order to maintain these values within a desired range. Problems in the industry: - Steam pressure control in drying process -Renewal demand for obsolete controllers -Need centralized data monitoring Why use this sensor: - Easy to use -Color LCD display with a wide variety of screens includes meter display that is suitable for the replacement of conventional controllers -Control output backup function -Dual CPU & Hard manual -Remote data monitoring via Ethernet Benefits: - Safe and stable control at low cost -Less engineering for replacement BACK
- 15. Density Control (Control and measurement station) -density control for stock preparation Problems in the industry: -Control pulp density and flow -Need both functions of controllers and recorders -Need high reliability under harsh environment Why use this sensor: -All-in-one controller that integrates monitoring and recording functions -6 embedded control loops, 20 measurement channels (CX2620) -Powerful display Standard variety screens for control monitoring -Math function Pulp dry mass flow can be calculated by Math function Benefits: -Integration of controller and recorder brings cost saving Dust-proof and water proof front panel (IP65, NEMA No.250 TYPE4* compliant) *Except external icing test. BACK
- 16. Manual Operation/Control unit -Independent manual override is built into the control circuits, ensuring that control output can continue even when a control circuit including the CPU experiences a problem. BACK
Editor's Notes
- #7: The sensor has a large bore (17mm) for optimal resistance to fouling processes and when properly installed ,the flow will keep the sensor clean, to help avoid measuring errors. This large bore also allows quick response even on low flow measurement. Also available upon request is a PFA lined sensor that provides excellent heat and chemical resistance.