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Show INTRODUCTION ENEL's plans in the area of environmental protection have developed in the last several years in response to Italian National and European health and environmental preservation interests. In this regard, ENEL has to comply with three international protocols on emissions reductions signed by the Italian government: the Helsinki protocol of 1985, the ECE-ONU protocol and declaration signed in Sophia October 1988, and the European Community Directive for large combustion plants. These protocols mandate S02 and NO emissions reductions from existing plants and set stringent limits for x new units. To meet the requirements concerning NO emissions, ENEL's x intentions are to reduce emissions through the application of state-of-the-art combustion systems(l) , and then, if necessary, apply other abatement systems as secondary control measures(2) . In order to meet future boiler emission regulations, ABB C-E has actively investigated new approaches to reducing NO emissions from T-fired boilers x using in-furnace methodologies. ABB C-E has developed a new, in-furnace, low NO coal firing system called the Concentric Clustered Tangential x Firing System (CCTFS) (patent pending). This system was initially tested at pilot scale (15 MWt, 50 MBtujhr) at C-E's Kreisinger Development Laboratory (KDL) and was recently installed at ENEL's 160 MW Fusina unit #2 near Venice, Italy. Work is now in progress at ABB C-E, under ENEL funding, to extend the capabilities of CCTFS to oil and natural gas firing, as well as to evaluate other promising in-furnace NO reduction technologies. ENEL's x coal designed boilers are typically capable of oil and natural gas firing should economics, supply considerations, or emissions regulations demand their use . As a result, ENEL requires emissions control strategies for all boiler fuels. These evaluations are being performed largely in ABB C-E's Boiler Simulation Facility (BSF) at a scale varying from 15 MWt to 30 MWt. Tests are being performed under conditions which simulate coal, oil, and gas-designed ENEL boilers of the ABB C-E/F.T.C. radiant reheat pendant 2 |