- Wood handling
-
Cooking and fiber line
- Knotting and screening
- Cooking
- Washing
- Oxygen delignification
- Bleaching
- Dissolving pulping
- Services for Cooking and fiber line
-
Chemical recovery
- Evaporators
- Recovery boilers
- White liquor plant
- Odorous gas control
- Lignin extraction
- Sulfuric acid plant
- Turpentine decanting
- Process support and optimization
- Rebuilds and upgrades
- Heat and power production
- Services for chemical recovery
- Pulp drying
-
Mechanical pulping
- Chip washing
- Chip treatment
- Refining and grinding
- Steam separation
- Washing
- Bleaching
- Screening and cleaning
- Services for Mechanical pulping
- Recycled fiber
- Stock preparation
-
Automation for pulp
- Analyzers and measurements
-
APC Advanced Process Controls
- Valmet WinGEMS
- Valmet Debarking Optimizer
- Valmet Batch Cooking Optimizer
- Valmet Continuous Cooking Optimizer
- Valmet Washing Line Optimizer
- Valmet Oxygen Stage Optimizer
- Valmet Bleaching Optimizer
- Valmet Evaporation Optimizer
- Valmet Recovery Boiler Optimizer
- Valmet Recovery Boiler Leak Detector
- Valmet Recovery Boiler Sootblowing Optimizer
- Valmet Causticizing Optimizer
- Valmet Lime Kiln Optimizer
- Valmet Recovery Line Management
- Pulp mill information management
- Process controls
- Quality management solutions for pulp
-
AQC Advanced Quality Controls
- TMP Predictive Quality Controller
- TMP Specific Energy Optimizer
- Paper Machine Blend Controller
- Paper Brightness Optimizer
- Power Contract Optimization
- Paper Quality Software Sensors
- Paper Quality Real Time Optimizer
- Sensor Validation
- IMonitor Performance Monitor
- Ponderosa Pulp Quality Software Sensors
- IMAS Process Control Data Server
- Boiler Diagnostics Systems
- Services for pulp
- Fiber Technology Center
- Pulp
- Cooking and fiber line
- Oxygen delignification
High-performance oxygen delignification
Valmet’s OxyTrac™ system removes lignin with excellent efficiency. It is the ideal oxygen delignification stage and a great asset for pulp mills.
Delignification with OxyTrac™ removes up to 65-70% of the remaining lignin after cooking. This result remains unchallenged. The secret lies in the carefully optimized conditions.
Substantial reduction of effluent load
Delignification with OxyTrac™ results in a low kappa number of the pulp entering the bleach plant. This enables a substantial reduction of the consumption of chemicals.
Other objectives of extending the delignification with OxyTrac™ are to reach a higher brightness of bleached pulp and to facilitate bleach plant closure. A higher yield of bleached pulp is obtained if an extended delignification by oxygen replaces a part of the residual delignification by cooking.
Advantages of OxyTrac™
- Removes lignin with excellent efficiency
- Substantial reduction of the consumption of chemicals in the bleach plant
- A flexible solution: OxyTrac™ suits production of hardwood pulps as well as production of softwood pulps. It involves one or two reaction stages.
- Process variables such as pulp consistency, temperature and reaction time, are optimized to achieve optimal delignification. OxyTrac™ is customized to meet every pulp mill's unique needs.
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