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State-of-the-art software for ultimate quality control

Valmet IQ Controls and Applications

The most important task of the controls and optimizations is to provide the capability to produce stable quality efficiently at economical optimum. Valmet IQ Applications are the core of the system with clear user interface and intelligent control applications which allow you to manage the machine line performance. Efficient user experience gives a clear view of process performance and product quality, at all times.

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Predictable quality and process stability

Papermaking processes are continually changing. Conditions vary in both intentional and unintentional ways, leading to performance gaps over time. Valmet bridges the gaps with the latest diagnostic tools, helping you predict and avert problems while improving your process performance and quality.

Using multivariable predictive controls (MPC), Valmet IQ Controls and Applications effectively manage interrelated paper qualities. Valmet’s solution keeps processes balanced, taking predictive actions across control loops. Our unique multivariable process models are based on decades of first-hand knowledge and real-world data, making quality truly predictable.

Multivariable control for machine direction

The Valmet IQ MD Optimizer integrates fast responding wet end process controls and dry end feedback controls to achieve a higher level of paper quality control performance. Paper process variability is reduced before the wet sheet is formed. You can perform faster startups and grade changes, reduce dryer breaks and get better runnability with stable short circulation improving uniformity of the wet sheet.

The control can be configured step-by-step from simple basis weight, feedforward weight and moisture control applications to more complex ash and retention control applications. Full scope Valmet IQ MD Optimizer can simultaneously manage the thick stock flow, filler flows, retention chemical flows and steam pressures to achieve smoother MD properties during steady-state, speed changes, and process upsets.

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Intelligent control for cross direction

The Valmet IQ CD Controls are high-level intelligent control applications that optimize CD performance for tissue and paper, including coater and calender, board machines and pulp dryers.

Using data from high-resolution measurements, IQ CD Controls handle everything from a single loop control to the most complex multivariable control solutions for any measured profile variable. Integrated tuning tools enable easy tuning and troubleshooting to ensure excellent web quality and runnability with fast recovery after process upsets.

 

Key features:

  • Scalable control concept and fine-tuned performance for different grades
  • Automatic grade change utilizing dynamic process models to ensure speed and accuracy
  • Built-in maintenance tools with automatic calculation of control model and parameters
Valmet IQ Controls offering
Stock Preparation and Wet-end controls Final Quality controls Profile controls (CD)
Refining Weight Dry weight
Blending Moisture Moisture
Charge Total Ash Caliper
Dryness Coat weight Reel Build-Up
White Water Consistency Color Coat weight
Headbox Ash Brightness Gloss
Thick Stock Ash Feedforward Porosity Fiber orientation
  Mottling  
  Strength  
     
  Tissue-specific controls  
  Crepe Ratio  
  Hood Aircap Temperature Bias  
     
  Advanced applications  
  Automatic Grade Change  
  Coordinated Machine Speed  
  Machine Speed Optimization  

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