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EPI's paper sludge fluidized bed successfully completes Performance/Emissions test!For Immediate Release: Coeur d'Alene, Idaho, February 1999 . . . Energy Products of Idaho (EPI), a leading supplier of fluidized bed energy systems, recently completed the final performance and emissions tests for Ft. James Paper Company's energy system in Wisconsin. The EPI state-of-the-art fluidized bed system burns 250 dry tons per day of deinking paper sludge to produce 52,000 pounds per hour of process steam at a pressure of 160 pounds per square inch. The combustion system was subject to some of the tightest emission constraints imposed on a "waste- to-energy" system of this size. Prior to final design and manufacture, EPI conducted extensive pilot plant testing at their research facility in Coeur d'Alene, Idaho. Several new and innovative features were incorporated into the final design to ensure compliance with the tight emission requirements. Actual emissions from the new facility are a fraction of the permitted values. The permit requirements and actual emissions are summarized in the following table:
(ppm = parts per million, dry volume) It is significant to note that the total reduction efficiency of SO2 was 95% (from the potential-to-emit based on the total sulfur in the fuel). NOx reduction efficiency was measured at 71% during the compliance test and even higher efficiencies were obtained by manipulating the temperature profile and ammonia injection flow rates. The tests confirm that converting paper mill waste products into usable energy, using EPI's fluidized bed system, is the most environmentally responsible and cost-effective method of dealing with a difficult waste material. EPI's research and development efforts have resulted in new and innovative features that are custom applied to each individual fuel. The enhanced fluidized bed combustion system creates an ideal environment for extremely efficient and complete destruction of volatile organic compounds. Aqueous ammonia is injected into the post-combustion zone for control of NOx. High quantities of calcium oxide, inherent to the sludge, effectively abates SO2 under the precisely controlled combustion environment. |
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Energy Products of Idaho
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