Air Quality Control Systems and Components - Hitachi Power ...

Example: Retrofitting Power PlantsA Truly Clean MatterWhether it is a new building or retrofitting, Hitachi Power Europe specialists have both theknow-how and the required products to substantially cut emissions in fossil-fired powerplants with the aid of up-to-the-minute environmental engineering.The newly built flue gasdesulphurization facilityat the Narcea power plantThe most recent example concerns the steps to upgrade the two “La Robla 2” and“Narcea 3” pit coal power plants. Both the 305 MW units in Asturia (northern Spain) are over25 years old. The technology used was no longer adequate to comply with the strictenvironmental protection regulations (standards for emissions of nitrogen oxides, sulphurdioxide and dusts) within the European Union. Hitachi Power Europe was commissioned by“Union Fenosa Generación” – the 3rd largest Spanish energy supplier – with designing andconstructing a flue gas desulphurization system (FGD) for both the power plant sites.HPE was also given the task of modifying the pulverized fuel burners to achieve firingsystem optimization of both boilers.Emissions from La Robla / Narcea (in mg/Nm 3 )La RoblaNarceaNO xSO 2 < 230*< 600NO x~ 1,200< 860~ 1,500SO 24,000*< 200*4,600*before upgrading after upgrading * dry at 6% O 2HPE handled the flue gas desulphurization systems in consortium with Hitachi subsidiaryHitachi-BHK and the Spanish Cobra company. The burners come from BabcockFertigungszentrum GmbH – a subsidiary of Hitachi Power Europe. The system parts – fromburners and fans to meter-high dampers – were manufactured, for instance, in Germany,Poland, Denmark and Ireland. The components were delivered just-in-time for immediateassembly purposes.The Hitachi Power Europe team handed over the systems to the customer as agreed to atthe end of 2008 and in mid-2009. The success can be measured. Refurbishment wasfollowed by a substantial cut in flue gas emissions – by 60 % in the case of nitrogen oxides(NO X ), 95 %+ in the case of sulphur dioxide and 50 %+ for the dust content.Air Quality Control Systems 15