Application Review

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Industry
Power Generation
End User
Ontario Power Generation
Location
Nanticoke Station

Application Details

Ontario Power Nanticoke uses eight, wet-bottom, wall fired Babcock and Wilcox boilers. Each has a 564 MWe capacity and were originally installed between 1973 and 1978. The primary fuel is bituminous (currently used at 100%) and the secondary fuel is natural gas.

Application Challenges

Ceramic blanket was used successfully for many years to insulate a section of each boiler called the Lower Vestibule, where temperatures can reach 1400°F. In the late 1990's, Ontario Power Generation developed a company policy that eliminated the use of ceramic fiber because of potential health risks it posed to employees and contractors. They intended to replace the ceramic fiber with rock wool, However, they soon found that the rock wool was failing prematurely, due to the disintegration of the organic binder used to hold the fibers in place. As the heat degraded this binder, the fibers would become loose, compact with gravity, and hot spots would develop.

Application Solution

Engineers replaced the resin bonded rock wool with an equal thickness of Treo™, which is 100% fiber with no chemical binders added.

Results and Impact

Treo™ became the standard after initial tests showed that no hot spots had developed. In the following five years, Nanticoke successfully installed over 120,000 sq ft of TreoTM while satisfying both Engineering and the Health and Safety Group with a product that was safe and outperformed their current system.