- Distributed control system
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Applications
- For Pulp
- For Board & Paper
- For Tissue
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For Energy
- Multifuel and biomass
- Waste-to-energy
- Combined heat and power
- Combined cycle and gas
- Hydro
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Applications
- Turbine automation
- Process optimization
- Energy management
- Fuel management
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Performance monitoring and reporting
- Plant operation
- Boiler performance
- System monitoring and reporting for turbines
- Steam turbine performance
- Gas turbine performance
- HRSG performance
- Pumps and fans performance
- Heat exchanger performance
- Operation point deviation
- Gas turbine wash
- Fatigue and creep
- Boiler sootblowing
- Boiler life
- Asset monitoring
- Emission monitoring and reporting
- For Marine
- For Alternative fuels
- Quality management
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Analyzers and measurements
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Analyzers
- Brown Stock Quality Analyzer
- Chip 'n' Bark Moisture Analyzer
- Recovery Ash Analyzer
- Recovery Liquor Analyzer
- Dirt Count Analyzer
- Fiber Image Analyzer
- Fiberline Analyzer
- Paper Lab
- MR Moisture Analyzer
- Lime Mud Moisture Measurement
- Pulp Expert
- Fiber Furnish Analyzer
- Fiber Furnish Control
- Retention Measurement
- Stand-Alone Retention Control
- Wet End Analyzer
- Corrosion Reduction Analyzer
- Cooking Liquor Analyzer
- Bleaching sensors
- Consistency
- Conductivity
- Boiler diagnostics systems
- Wastewater
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Analyzers
- Condition monitoring
- Industrial Internet
- Automation projects
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Automation services
- Spare parts
- Maintenance and technical support
- Cybersecurity services
- Upgrades and lifecycle services
- Condition monitoring services
- Process performance services
- Learning services
- Service agreements
- Partner network
- Automation
- Quality management
- Quality control system (QCS)
- Measurements
- Ash
- Total Ash Measurement
Valmet IQ Total Ash Measurement
The accurate scan averages and high-resolution CD profiles measured by Valmet IQ Total Ash Measurement (IQ Total Ash) provide a solid foundation for Valmet’s machine-direction total ash content controls. Digital signal processing, and high-speed air density temperature compensation ensure superior measurement accuracy in hot, humid and dirty papermaking environments. IQ Total Ash measures total ash in papers containing clay or other fillers.
Features
X-ray radiation from an Fe55 nuclear source is preferentially absorbed by the inorganic material in a paper sheet. As ash content increases, transmitted radiation that is captured by the ion chamber detector is reduced. This basic measurement principle is refined by using special sensor-design techniques and measurement diagnostics to provide the stable, high-resolution measurements needed for precise control. Ash content is factory calibrated for sheets containing clay or calcium carbonate or titanium dioxide.Normal, radioactive decay is nullified by an automatic standardization sequence.
The effects of air density changes are measured and automatically compensated using high-speed air temperature measurements. In addition, temperature measurements within the source and detector heads monitor the internal sensor environment for diagnostic purposes. Using a real-time gap measurement sensor, the effect due to possible source-detector gap distance variation is automatically compensated.
Benefits
- Accurate and stable on-sheet measurements for precise control of ash content in paper.
- Ash content can be optimized to improve quality and reduce furnish cost.
- Faster on-spec quality and reduced startup waste.
- Coat-weight control by ash difference measurement method.