An optimized two stage oxygen delignification process.
The two stage oxygen delignification process using DUFLO™ medium consistency pumps and DUFLOMIX™ mixers enables an overall optimization both with regards to kappa reduction and selectivity.
This design is particularly useful for softwood kraft mills.
Benefits compared to a single stage process:
• Extended delignification feasible
• More selective delignification
• A simple design
• Optimum conditions for the delignification process
• Flexibility to adjust pressure and temperature in both reactors