In the commercial co-generation power plant Värtan, Stockholm, Putzmeister high density solids pumps Type KOS
work maintenance-free. A mixture of coal and lime is pumped into a load pressurized circulating fluidized-bed furnace during the complete heating period which reaches about 6500 hours in Sweden. By using this technology it is possible to reduce the pollution of coal power plants considerably.
Flotation coal, which is a waste material from coal mining, can be recycled with Putzmeister technology and combusted as additional fuel in existing coal power plants.