In the early 1980s, Virginia Power`s Possum Point power station experienced recurring leaks problems in the valve on its No. 3 sootblower unit. The leaks were costly to repair, for parts, labor and downtime, and were gradually eating away at the valve`s internal parts. Over time, both the internal parts and the valve body had to be replaced.
Low-NOx burners are becoming common equipment as utilities strive to comply with the Clean Air Act Amendments, but in coal-fired units, the modified combustion process that reduces NOx formation can also negatively affect the burn-out of the pulverized coal, resulting in increased carbon in the flyash and reduced unit efficiency.
Rolls-Royce Industrial & Marine Gas Turbines? industrial RB211 is the world?s first aero derivative dry low-emissions engine to enter service. The engine entered operation at Pacific Gas Transmission Co.?s (PGT) natural gas pumping station near Spokane, Wash.
A single broken or disconnected fan blade can induce vibration that renders a fan useless. While power plant fan repair and replacement costs can rise as high as $500,000, the cost is small compared to lost revenue from a long unscheduled outage to complete the job. It is not surprising then that non-destructive testing (NDT) is essential in detecting system component trouble. New-generation test materials and highly experienced service specialists are substantially improving inspection effectiv
Steel welded fintubes are used to reduce the size and cost of heat exchangers and in power boilers such as heat recovery steam generators (HRSG), and are a fundamental element of their design. Competing companies look for advantages by offering different tube sizes and fin pitches, with solid or serrated fin surfaces.
Impurities in the water-steam cycle of fossil-fired power plants can lead to corrosion and deposit formation in boilers, turbines, feedwater heaters and condensers. In the mid 1980s the Environmental Protection Research Institute (EPRI) issued interim cycle chemistry guidelines for controlling these impurities with phosphate treatment and all-volatile treatment (AVT). EPRI has recently issued new guidelines that reflect researcher?s greater understanding of oxygenated treatment (OT) and phosphat
People: Ross D. Ain has been named senior vice president of Cogen Technologies Inc....Carl Zeiss Inc. appointed Rob Siemers to division manager for surveying products, headquartered in Thornwood, N.Y., and Mike Kitaif to division manager for photogrammetry products, headquartered in Engelwood, Colo....Richard E. Balzhiser, Electric Power Research Institute president and CEO, became a member of the National Academy of Engineering....Copes-Vulcan appointed Roderic B. Karpen chairman and CEO....Ro
The heating plant at the University of Alberta has installed low NOx burners on its two newest boilers to ensure compliance with Canada?s strict air pollution regulations. The plant supplies heating steam, de-mineralized water, compressed air and some electricity to a campus population of approximately 45,000 people.
Southern California Edison?s Huntington Beach generating station recently underwent two sets of dye dilution flow studies on its Unit 2 circulating water pumps. Testing was conducted by Dye Flow Technologies. The first tests evaluated the full-flow performance of the two pumps and identified deficiencies requiring maintenance (see graph). Results revealed flow rates substantially below the manufacturer?s flow curve when graphed with the head generated during the test.
ABB Power Generation?s GT24 and GT26 advanced gas turbines produced single-digit NOx emissions during combustion testing. These are the first two models of ABB?s advanced gas turbine family to utilize a sequential combustion system consisting of two annular combustors, an EV and an SEV. These test results dispel an industry myth that high thermal efficiency is incompatible with low emissions.