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3D TRASAR
5500 - Installation & Operation Manual
5.3
3D TRASAR Scale Tagged Polymer Control
3D TRASAR Scale Tagged Polymer Control can only be used with 2-Drum programs.
5.3.1 3D TRASAR Scale Tagged Polymer Control: 2-Drum Program Overview
Initial start-up for 3D TRASAR Scale Tagged Polymer Control: 2-Drum program is a 4-Step process.
This process is necessary for product transition and for the 3D TRASAR controller to learn the
average scaling stress of your cooling system and develop the appropriate control responses to
optimize the treatment program:
Before -
Make sure to baseline your system performance data before initiating the 4-Step process. By
doing this you will be able to clearly see the added value provided by 3D TRASAR Scale Control.
Step 1
TRASAR Control Mode
- The purpose of this step is to gradually replace any old
UNTAGGED polymer product with the new, TAGGED polymer product. The TRASAR Product is
controlled based on TRASAR while the Tagged Polymer Product is slaved to the TRASAR Product.
Blowdown is controlled based on conductivity during this period.
Step 2
3D TRASAR Scale Tagged Polymer Monitoring Mode
- In this step the 3D TRASAR control-
ler learns the typical rate of polymer consumption needed to calculate NSI. The T agged Polymer
product will now be controlled based on the setpoint recommended by the 3D TRASAR Optimizer .
The TRASAR product will still be under TRASAR control mode. Blowdown is controlled at the same
conductivity setpoint. No Tagged Polymer setpoint adjustments will be made until Step 3.
Step 3
3D TRASAR Scale Tagged Polymer Control Mode
- This step switches the Tagged
Polymer control to Scale Index Control. The controller will now respond to high system scale
stresses by increasing the Tagged Polymer setpoint.
Step 4
Advanced 3D TRASAR Scale Tagged Polymer Control Mode
- This step adds to 3D
TRASAR Scale Tagged Polymer Control the feature of decreasing the Tagged Polymer setpoint
during low scale stress conditions to maximize chemical efficiency.
3D Scale
Tagged Polymer
Control
2-Drum
Program Start-Up Overview
Time
Before
•TRASAR
Control
•TRASAR
Control
•
Monitor
Tagged
Polymer
•TRASAR Control
•
Control
Conductivity
•
Monitor
Nalco Scale Index
•TRASAR Control
•Control Conductivity
•
Control
Nalco Scale Index
Tagged Polymer
Step 1
Step 2
Steps 3 & 4
TRASAR
Conductivity
0
100
ppm
Содержание 3D TRASAR Series
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