A brief discussion of the sensors used for pulp and paper industry

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