Open AccessField performance of erosion resistant materials on boiler induced draft fan blades
Author(s) -
O.F. Karr,
J. Brooks,
E. Seay
Publication year - 1993
Language(s) - English
Resource type - Reports
DOI - 10.2172/29407
Subject(s) - fly ash , flue gas , boiler (water heating) , electrostatic precipitator , power station , air preheater , flue , engineering , waste management , coal , hull , thermal power station , environmental science , marine engineering , electrical engineering
The TVA Kingston Fossil Power Plant has nine units and is located near Kingston, Tennessee. Units 1 through 4 have a rating of 148 MW and units 5 through 9 have a rating of 197 MW. Each unit has two induced draft fans manufactured by Westinghouse Electric Corp., Sturtevant Division. A table showing design data for the induced draft fans is located on page 16 of this report. The fan blade design details for units 5 through 9 are shown on pages 11 through 14. There is a mechanical fly ash collector and a small electrostatic precipitator preceding the induced draft fans in the boiler flue gas stream and a large, efficient electrostatic precipitator downstream of these fans. The steam generators and pulverizers were supplied by Combustion Engineering. The average temperature of the flue gas is about 340 degrees Fahrenheit for units 5 through 9. All induced draft fans in the boiler flue gas stream experience erosion from fly ash. When the precipitators and fly ash collectors were new the fan blades would last about three years before they were eroded severely and had to be replaced. Kingston Plant personnel say the fly ash collectors are presently in need of major repairs; therefore, the fan blades are not expected to last as long as they did when the plant was new