Product/Service

Charge

Source: Chemtrac, Inc.
When all is said and done, the best reason to measure charge is to improve your mill's profitability
Chemtrac, Inc.ure wet-end charge?

When all is said and done, the best reason to measure charge is to improve your mill's profitability. If charge can be measured it will indicate trends away from the norm and allow the operator (or the distributed control system) to make the necessary adjustments to return to normal operations. Such charge control can result in one or more of the following benefits:

  • Improved first pass retention on the wire
  • Reduction in the amount of wet-strength resin
  • Reduction in stickies problems
  • Quantifies substances that interfere with the furnish ("Anionic Trash") so they can be controlled
  • Identifies problems in the stock approach system
  • Dye Fixation
  • Improved creping control
  • Improved sheet softness
  • Increased run time between breaks
  • Optimization of product properties

    • In short, charge control can result in higher machine efficiency and a reduced cost per ton of production.

    How does the electrokinetic charge titrator work?

    The ECT operated on the "streaming current" principle. The measurement cell consists of a reciprocating piston in a probe assembly. Particles and dissolved materials are attracted to the surfaces of the probe by Van Der Waals forces. The motion of the piston produces a "shearing" of mobile counter ions on the probe surfaces. Electrodes mounted inside the cylinder measure the "streaming current". The signal is electronically processed and displayed on the digital LED display.

    The ECT takes the above process one step further and measures charge demand. The technique used is automatic titration with a known cationic or anionic polymer solution to the isoelectric endpoint (streaming current zero charge). This signal is electronically processed and sent to the DCS for logging and system control.

    The ECT has been developed by Chemtrac Systems engineers in conjunction with paper mill people and chemical suppliers. Over fifteen years of "streaming current" experience has resulted in reliability and process knowhow. And we are fully Y2K compliant. We are ready to put our experience to work for you!

    <%=company%>, 6991 Peachtree Industrial Blvd., Building 600, Norcross, GA 30092. Tel: 800-442-8722 or 770-449-6233. Fax: 770-447-0889.