Customer: The Navigator Company
Production: Pulp and UWF paper
Description: Andritz has received an order from the pulp and paper producer The Navigator Company to supply a new recovery boiler, new ash leaching system and an upgrade of the non-condensable gases (NCG) collection and incineration system for its pulp mill in Setúbal, Portugal. The non-condensable gases (NCG) collection and incineration system is part of Andritz’s CircleToZero initiative that focuses on eliminating unused side streams, create new added-value products and lay a foundation for zero emissions and zero waste production.
Details: The Andritz scope of supply includes:
• A new HERB recovery boiler designed for a virgin black liquor burning capacity of 2,100 tds/d with steam parameters of 64 bar(a) and 460 °C. The new boiler is designed for long continuous operation periods without a need for water washes. It will replace the existing recovery boiler that has been in operation at Setúbal for decades. The recovery boiler investment supports possible future developments at the Setúbal mill as it is equipped with the possibility of increasing steam parameters and black liquor dry solids concentration. The boiler features a high degree of automation with digitalization products such as smelt spout robots, higher-level controlling systems and water leakage advisor.
• A new ash leaching system, integrated into the recovery boiler, with a capacity of 95 t/d. It will reduce chlorine and potassium levels but also recover important chemicals.
• An upgrade to the non-condensable gases (NCG) collection and incineration system. The delivery includes the collection of dilute non-condensable gases (DNCG) from the fiberline and evaporation areas, and an upgrade to the concentrated non-condensable gases (CNCG) collection and incineration system. Both DNCG and CNCG will be incinerated in the new recovery boiler. The NCG system upgrade will improve mill safety and environmental efficiency, thus meeting the strictest environmental and social requirements.
Start up: Andritz will execute the order on a turn-key basis with start-up scheduled for the first quarter of 2025