Pulp & Paper: Instruments and Solution for Pulp & Paper Industry

Pulp & Paper Plant for the World Process for Fundamental Materials, Requires Effective Production with vast Operational Excellence

Challenges in the pulp & paper plant

Continuous technology improvement is ongoing in the pulp & paper industry to obtain the best possible performance. The improved plant performance translates to the higher quality improvement and lower cost, and simultaneously environmental friendly plant operation.

In the pulp & paper plant, there are many critical applications to measure the severe process condition, such as corrosive chemicals, aggressive pulp slurry with extremely high temperature and pressure condition. And stable and accurate measurement and control in these severe process condition and hash environments is the key to optimize the process control and the performance of plant operation.

As your best solution partner

For many years, Yokogawa has developed the process measurement & control product line-up with the collaboration with pulp & paper industry based on the process knowhow and experiences.

Yokogawa's wide and powerful sensors line-up are available with ''best-fit-model selection'' for every process in the pulp & paper plant, and delivers stability, precision, robustness in process measurement even under the challenging application such as digester and washer in chemical pulp plant. The high performance and intelligent controller helps to achieve higher quality production control in the pulp and paper.

Safe and Realizable Plant Operation

The predictive diagnostics availability of sensors delivers the predictive maintenance capability. The combination of the reliability of field-proven technology, and the latest technology of intelligent diagnosis strongly support higher level of safe and reliable plant operation at low cost.

Why buy Yokogawa?

The reliable and accurate measurement & control with Yokogawa's sensors and controllers support to achieve the dual aim of the high quality production at low cost and environmental friendly plant operation. In addition, the Yokogawa's experienced project handling and service capability in the pulp & paper industry support the successful project execution and life-cycle optimization in your plant.

Washer: Monitor Filtrate Liquor

ISC202G & PEEK sensor

Overview and Problems

• Filtrate conductivity monitor
• Existing electrode type conductivity sensors are easy to clog

Solution

• Wide measurement span
• No clogging of black liquor

Benefits

• Fast response
• Low maintenance cost and time

Bleaching filtrate: Monitoring pH Value

PH202G & Chemical sensor

Overview and Problems

• Excessive Cl₂O weaken paper intensity
• Existing residual Chlorine deteriorate the electrode

Solution

• Special anti-corrosive glass membrane
• Special anti-corrosive structure of Ag ion trap

Benefits

• High accuracy to improve paper intensity
• Low maintenance cost and time

Digester / Blow Line: Pulp Slurry Flow Measurement

Overview and Problems

• Slurry noise (10 wt% pulp slurry)
• High abrasive fluid (solid material)

Solution

• Dual frequency excitation
• Standard high frequency 75 Hz
• Optional high frequency 160 Hz
• Ceramics lined AXF
• 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

Adhesive Fluid Measurement

Overview and Problems

• Adhesive chemicals
• Wood resin adhesion
• Dye adhesion

Solution

• ADMAG CA
• Mirror finished AXF
  - Ceramics lining
  - PFA lining
• Predictive electrode coating Diagnostics function

Dryer: Pressure Control

YS1000 series

Overview and Problems

• Steam pressure control in drying process
• Renewal demand for obsolete controllers
• Need centralized data monitoring

Solution

• 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

YS1000 series is available also for other processes in pulp & paper industry.

Stock Preparation: Density Control

CX1000 / CX2000

Overview and Problems

• Control pulp density and flow
• Need both functions of controllers and recorders
• Need high reliability under harsh environment

Solution

• 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.

Technologies Commit Users' Benefits

Our Goal
Our shared goal is customer satisfaction through operational excellence.
Yokogawa has brought true innovations to industry. We are committed to ensuring accuracy, reliability, and safety of your production system throughout your business life cycle. Our comprehensive solutions and expertise help you achieve more results with less total costs of ownership. Below key technologies shall aim for your operational excellence.

Inductive Conductivity Sensors

The ISC sensors use a high performance engineering plastic of PEEK (polyetheretherketone) that provides abrasion and corrosion resistance.

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.

Dual Frequency Coil Excitation

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. Dual Frequency Coil Excitation is Yokogawa's original technology to ensure ± 0.35 % accurate measurement as well as 0.1 second fast response simultaneously.

Our signal processing technique enables us to bring the benefits of an AC & DC magnetic flow meter into a single magnetic flow meter.

Manual Operation "Hard Manual"

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.

Dust-Proof and Water-Proof Front Panel

The front panel has a dust-proof, water-proof design which is compliant with the IEC529-IP65 and NEMA No.250 TYPE4^* standard. This structure provides good protection for the recorder's internal components and the removable storage media drive mechanism.

*Except external icing test.

DPharp Silicone Resonant Sensor

DPharp Pressure Transmitters with digital silicon resonant sensor delivers the maximum benefits from the elasticity of the single crystal silicon material while enhancing sensitivity and repeatability. The properties of the resonators remain constant over time. This makes DPharp the ideal pressure sensor for harsh industrial automation environments. DPharp delivers stability, repeatability and reliability that you can rely on.

For Your Operational Excellence

Inductive Conductivity Transmitter: ISC202

• Single stain-resistant sensor covers a wide measuring range
• Process-independent customized temperature compensation
• Fieldbus communication capability
• Intrinsically safe version

pH Transmitter: PH202

• Designed for two-wire system configuration
• Fieldbus communication capability
• Event logbook
• Intrinsically safe version

Single Loop Controller: YS1000 Series

• Tow Programming Method
• High reliability
• Compact and Light Weight
• Expandable I/O
• Compatible with YS170 and SLPC

Control and Measurement Station: CX1000/CX2000 Series

• Up to 6 embedded control loops, 20 measurement channels
• Standard variety screens
• Independent/synchronous program control
• Built-in, standard Ethernet interface
• Reliable hardware

Magnetic Flow Meter: ADMAG AXF Series

• Best-in-class performance with dual frequency excitation method
• Predictive electrodes adhesion diagnostics
• Variety of liners & electrode materials
• Fieldbus communication capability

Pressure Transmitter: DPharp EJA/EJX Series

• Best installed performance
• Compact and rugged design
• Multi-sensing digital sensor
• SIL2 as standard (EJX)
• Fieldbus communication capability

Temperature Transmitter: YTA Series

• High resolution, high stability and high versatility
• Dual compartment housing for harsh environments
• SIL2 safety as standard feature
• Fieldbus communication capability

Subject to change without notice.
All Rights Reserved, Copyright© 2008, Yokogawa Electric Corporation.

ADMAG AXF and DAQMASTER are registered trademark of Yokogawa Electric Corporation.
DPharp is a trademark of Yokogawa Electric Corporation. Ethernet is a registered trademark of Xerox Corporation.
Other company names and product names appearing in this document are registered trademarks or trademarks of their respective holders.