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Fluidized Bed Passes Stringent NOx TestFor lmmediate Release Contact: Environmental and Performance Testing of new Plant Proves Clean Stacks with Worst Case Fuel
Shippenville, Pennsylvania, April 1997 . . . Energy Products of Idaho was on site to witness performance testing of our 141 MBtu/hr Fluidized Bed Combustion System at the MacMillan Bloedel, Clarion Ltd. medium density fiberboard (MDF) facility. This successful test validated the energy output guarantees and environmental compliance of the energy facility.
The EPI system performed even better than expected, passing the emissions test with fuel that contained substantially higher levels of oxides of nitrogen (NOx) than originally anticipated. The original intent was to limit fuel for the energy system to 23% urea formaldehyde resinated MDF waste with the balance being nonresinated wood waste. Fuel with this specification was calculated to have a fuel-bound nitrogen content of 0.92% (dry basis). Fuels available for the test, however, were substantially different than the worst case design due to plant operation constraints. The actual test fuel contained an average of 2.3% bound nitrogen, or two times the design limit. NOx emissions permit levels were easily obtained even with the increased nitrogen present in the fuel. All other emissions and performance criteria were also successfully demonstrated. In this system, both inbed fuel feed and overbed feeders are used simultaneously or individually to inject fuel into the fluidized bed combustor. This feeding arrangement is unique in the industry and is a significant factor in meeting the stringent emission limits. Latitude in the EPI fuel feed and fluidized bed design resulted in low unabated (prior to reduction) NOx emissions with higher than anticipated levels of fuel nitrogen. Injection of urea with a selective noncatalytic reduction (SNCR) system resulted in NOx emissions 10% below the permit limit. It was also significant that even at these high abatement levels there was no detectable ammonia slip. Carbon monoxide (CO) emissions during the test program were less than 5 parts per million on a dry volume basis (ppmdv). This concentration represents a total LB/hr emission of approximately one tenth of the permitted limit. EPI has supplied waste-to-energy systems for twenty-four years and has 74 installations worldwide. The systems burn a wide range of solid waste materials including municipal garbage, municipal and industrial sludges, wastepaper and cardboard, plastics, paunch manure, biomass, coal, wood, agricultural wastes, and other waste materials. EPI is pleased to add the MacMillan Bloedel Clarion Ltd. facility to its list of successful, environmentally responsible, waste-to-energy designs. |
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Energy Products of Idaho
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