Mälarenergi chose Alstom's environmental technology

Alstom, a world leader in the supply of air pollution control systems for electricity generation and other industries, has recently been awarded an EPC contract by MälarEnergi in Västerås, Sweden for the flue gas cleaning system for their new waste fired boiler. The advanced Alstom flue gas cleaning system will both reduce the emissions to levels well below the EU requirements and recover valuable heat to the district heating grid of the city of Västerås.

The scope of the system will comprise an Alstom NID semi dry system which will clean the gas by the injection of lime and activated carbon. This will prevent most pollutants derived from the combustion process from reaching the environment. Downstream the NID system a scrubber and flue gas condensing unit is installed that will further clean the flue gas and recover valuable energy.

The condensate produced in this process will be treated in a waste water treatment plant to secure that the water discharged from the plant is clean and harmless for the recipient the lake Mälaren.    

Alstom will in this project clean the flue gas from what will be the worlds largest waste fired Circulating Fluidised Boiler which will have a fuel capacity of 60 t/h of various waste fractions. The emission requirements are very stringent and Alstom was selected on the base of our strong technical capabilities, innovative solutions and good references. The project will be executed from the Alstom Environmental Control Systems Waste to Energy competence centre in Växjö, Sweden.