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PE Volume 99 Issue 7

Recirculation control valve replacement cuts maintenance costs

Replacement of boiler feed pump recirculation control valves solves a maintenance problem on Baldwin Unit 3

Biomass plant credits efficient operation to use of highly accurate digital meters

Delano Energy Co., a subsidiary of Thermo Electron, turns waste wood into electricity to power southern California homes and businesses. The plant is licensed to deliver power to the Southern California Edison grid at levels below 50 MW. Higher levels require compliance with public utilities regulations, so Delano must monitor output to keep it at or below 49.9 MW. Operators constantly monitor output and many other aspects of the facility, including transformer and motor loads to keep the plant

Bioremediation: Its a natural

Bugs can be pests around the house or garden, but for utilities with chemical wastes to dispose of, they can be a cost-efficient tool, saving disposal expenses and man-hours, according to Donnie White, president of Southeastern Biotechnics.

A range war is brewing

Roger Naill, vice president of AES, the large independent power producer, reports that his firm has lost on projects lately on bids of three cents a kilowatt-hour, adding, "Prices are ridiculous. This market is unbelievably competitive."

Valves Introduction

Part 1 of this report discusses advantages gained when a new boiler feed pump (BFP) recirculation control valve design was used at an Illinois Power Co. installation. One author, Mark Liefer, Baldwin Power Station engineering coordinator, (page 24) provided the following separate comments on the experience.

Battling boiler corrosion

To boiler operators everywhere the enemy is well known. It is corrosion, the creeping malaise that if not held in check will eventually eat away the availability and useful life of a fossil-fueled power plant. According to the Electric Power Research Institute (EPRI), it has been estimated that corrosion-related problems in utility steam generating plants are responsible for 50 percent of forced outages and account for the majority of all tube failures. Another EPRI study pointed out that failur

Environmental protection via valve monitoring

Small fluid leaks (i.gif., liquid, gas or two-phase mixtures) conceivably can go unnoticed in a power plant and, eventually, some effluent might find its way into the environment. Any resulting violation of pollution control rules or other regulations could be costly.

High-tech underwater maintenance increases safety, reduces costs

Using new inspection technologies and highly-trained divers, diving contractors provide much-needed services to power plants

Its time to take fuel cells seriously (Part II)

Industry/DOE demonstration partnerships in higher temperature fuel cells add impetus to the technology`s development

Boiler-related deaths drop to 3-year low

Deaths from boiler and pressure vessel accidents in North America decreased to the lowest point in three years, according to the 1994 Incident Report from the National Board of Boiler and Pressure Vessel Inspectors. The number of accidents increased in 1994, but the decrease in the number of injuries sustained in accidents resulted in the best injury-per-accident ratio since 1992. Unfired pressure vessel operator error/poor maintenance is the leading cause of death with nine deaths between 1992


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