Power plants go to waste in Sweden

3 June 2003

Municipalities throughout Europe continue to show renewed interest in district energy-from-waste plants as an economic means of generating additional revenue, while solving environmental issues associated with the accumulation and land-filling of household and other renewable waste sources. Sweden remains particularly active in this area, as exemplified by three recent projects.
Aker Kvaerner's recently launched Power Division is to supply Borås Energi AB of Sweden with an energy-from-waste plant consisting of two ACZ (Advanced Combustion Zone) power boilers featuring bubbling fluidised bed technology. Aker Kvaerner's contract represents more than 35 million euros of Borås Energi's total investment of about 45 million euros.
The boiler capacity is 20 MW each and the delivery includes the boilers and auxiliary systems such as fuel storage and fuel feeding systems, ash handling equipment and flue gas cleaning system.
The boilers, fired with household and industrial waste, recycled wood and biofuels, will produce superheated steam for generating electricity and district heat. The boilers are designed for optimum efficiency, minimum emissions and high availability.
The ash handling system of the boiler plant is designed to meet the future EU requirements for various types of ash. The entire plant is designed to handle several types of waste streams.
The plant will start-up in the early part of 2005.
In Linköping, Alstom is to provide engineering, supply, erection and commissioning of a turbine package for a new energy-from-waste plant. The customer and owner of the facility is the municipal energy company, Tekniska Verken i Linköping AB. The scope of supply covers a 20 MWe ST3 steam turbine, to be manufactured in Alstom's facility in Nuremberg, Germany, a generator, exhaust piping, district heating condenser, condensate pumps and the related electrical equipment, with instrumentation and controls.
The turbine package is scheduled to enter commercial operation in January 2005. Alstom says it has previously supplied a number of steam turbines and gas turbines to Tekniska Verken i Linköping AB, as stand-alone and as combi-packs. District heating, electricity production and waste-to-energy are among the priorities of this company.
The new project will also be beneficial to the local community, providing another step towards securing a larger supply of district heating.
Meanwhile, Babcock & Wilcox Vølund ApS has announced the award of new waste-to-energy plant for Finspong.
Babcock & Wilcox Vølund ApS, which is headquartered in Esbjerg, Denmark, has received a contract from the Finspong municipal waste authority for the turnkey supply of a new 10 MWe waste-to-energy boiler. The new boiler, to be used as a base load unit at the Finspong station, will be designed to burn wood chips, household waste, and other waste fuels at a rate of 4.6 metric tons per hour (10 100 pounds per hour, or nearly 250 000 pounds per day). Existing boiler units within the Finspong area are designed to burn only waste wood chips.
The Babcock & Wilcox Vølund scope of supply includes the steam generator, related electrical equipment, controls and instrumentation, ash handling systems, and flue gas cleaning equipment. Civil engineering, architectural work, and balance of plant equipment will be furnished by a local Swedish contractor.
The new Finspong plant is scheduled to begin operation in the spring of 2004.

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