Austria-headed international technology group Andritz AG has received an order from the Sweden-headed energy major Vattenfall AB to deliver a new biomass boiler plant with an external biomass handling system for their “Carpe Futurum” project. The plant will be located on Vattenfall’s existing combined heat and power plant site in Uppsala, Sweden some 70 km north of the capital Stockholm. The new plant will supply district heat to the Uppsala area and will be prepared for electricity production.
The “Carpe Futurum” project is an important part of Vattenfall’s goal of becoming carbon dioxide (CO2) neutral at their combined heat and power (CHP) plant by 2030. Vattenfall delivers district heat to more than 90 percent of households in Uppsala, providing heat for about 150 000 people.
The scope of supply includes biomass receiving, handling and storage silos, a biomass-fired boiler with flue gas cleaning, and a flue gas condenser. The fuel handling equipment will be supplied with Andritz’s own technology, which has been proven in several installations worldwide. Start-up of the boiler is scheduled for the end of 2021.
The boiler is based on the Andritz EcoFluid bubbling fluidized bed (BFB) design, which combines high efficiency with excellent environmental performance. The flue gas condenser after the boiler significantly increases the district heat output and, therefore, improves the plant efficiency.
The fuel for this new plant will comprise different kinds of wood-based biomass, such as recycled wood, bark, wood chips, and sawdust. The plant will supply 110 MW of heat to the district heating network.
The value of the order has not been disclosed although Andritz says that the repeat order from Vattenfall “once again demonstrates Andritz’s strong global position in the supply of state-of-the-art and environmentally friendly biomass boilers and fuel handling equipment.”