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

Oxyfuel TechnologyExaminations have been conducted both inside and outside the Group for many years nowinto oxyfuel technology on the pilot plant scale by Hitachi Power Europe in associationwith both universities and partners.Oxyfuel Process Flow DiagramSteam circulationAirseparationSteam generator DeNO unit ASUx N 2Heat discharge HeatCO 2displacement compressionAirsystemCO 2O 2Draft fanElectrostaticCoalFGDDrying andprecipitatorafter-cleaningFlue gas recycleAshSulphurH 2 OH 2 OH 2 OValuable findings have been collected into the operational basics and design software fora variety of components has been adapted to the revised requirements.These findings have been made use of, for instance, in designing a new DS ® -T burner forfiring dry fuels. This burner was successfully tested in a 30 MWth experimental combustionfacility under air combustion conditions in 2009 / 2010. The fuels used were dry lignite,bituminous coal and dust-like biomass. The fact that stable combustion was maintained underadherence to the relevant emission data is proof of the high flexibility of HPE's technology.The second step saw this burner – under a technology partnership scheme with energysupplier Vattenfall – being successfully tested in the “Schwarze Pumpe” oyxyfuel pilot plantup to April 2010 and placed into service. Combustion optimization is now proceeding.The findings will flow into the design of an oxyfuel demonstration plant which is currentlybeing planned.In conjunction with sister companies, HPE also validates the design fundamentals andmaterials / catalyst materials for other major components, such as the desulphurizationand denitrification equipment of oxyfuel flue gases, and materials for the boiler.Flame images of the burner testswith dry lignite (top), biomass (center)and bituminous coal (bottom)Air Quality Control Systems 13