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Continuous Batch Cooking
Continuous Batch Cooking
Continuous batch cooking technology for production of paper grade pulp.
Features
- Improves yield, pulp homogeneity, strength and bleachability
- Increases pulp production without additional digesters
- Reduces production costs
- Accepts bad chip quality
- Applicable for retrofits and green-field installations
In Detail
Continuous Batch Cooking (CBC) combines the advantages of batch operation with the continuous preparation of cooking liquors. The basic concept is to prepare all the process-related liquors in the tank farm using different tank-to-tank circulation loops.
During the impregnation and cooking steps the process liquors are circulated from the liquor tanks to the digester and back to the liquor tanks. The required process conditions such as alkali concentration and temperature are adjusted by continuous addition of cooking chemicals and steam.
CBC is the only displacement technology allowing a consistent and even alkali profile throughout the impregnation and cooking steps. Quick heating to temperature and the unique alkali profile are the main keys for the significantly reduced cooking cycle time and for improvement in pulp quality.
CBC´s special liquor management shortens the cooking cycle time and boosts capacity while improving pulp quality and yield. Quality benefits extend to pulp homogeneity, strength properties and bleachability.
CBC utilises minimum equipment, thus saving investment costs and simplifying operation and process control. Separate digester circulation systems and circulation heat exchangers are no longer required.
Lenzing Technik´s specialists have extensive know-how in design, engineering, erection and optimisation of digester plants. Their experience in combination with the company's competence in project management and contracting ensures superior project realisation.
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