| OCR Text |
Show processes are being planned. The demonstrations at a number of utility sites are discussed with particular emphasis on a demonstration at the Salem Harbor #3 unit of NEP. In this demonstration, testing was conducted on two coals under full load. The FEGT measurements clearly displayed the slagging behavior of the coals and is being used for decision making to utilize this low sulfur coal. The importance of measuring and controlling FEGT when burning a variety of coal sources is evident to NEP. FEGT is not only an accurate indicator of boiler performance (along with steam temperature and attemperature spray flows), but high FEGT can also signal the following concerns: Increased furnace slagging Increased potential for convective pass fouling Increased risk of overheating convective tubes or tube supports Increased NOx emission. Because of the testing program, continuous use of the OTM is currently being considered by NEP for better control over sootblower operation and furnace conditions. 5. REFERENCES 1. L.G. Yori, F.R. Davis, Jr., J.A. Kleppe, "Acoustic Pyrometers: Picture Windows to Boiler Performance," Power, p. 65, August 1991. 2. Bretz, E.A., "Infrared Detects Fouling, Maintains Efficiency," Power, p. 84, August 1989. . f J: 9 |
