ESET-212 Lecture 9: ESET212-coal
Document Summary
Coal : the most widely used fuel for electrical power generation. Common types of coal are: anthracite coal, bituminous coal. Hard coals contain greater potential to produce heat energy than do the softer, geologically "newer" coals. Anthracite is the hardest and most brittle of all coals, and when burned, produces a very hot blue flame. Volatile matter is low at approximately 5 percent, with 10 to 20 percent ash. Moisture content is roughly 5 to 15 percent. It is slow-burning and difficult to ignite because of its high density, so few pulverized coal-fired plants burn it. Anthracite is considered non-clinkering and free burning, because when it is ignited it does not. Particulate matter, or fine soot, from burning anthracite can be reduced with proper furnace configurations and appropriate boiler load, under fire air practices, and fly ash reinjection. Fabric filters, electrostatic precipitators (esp), and scrubbers can be used to reduce particulate matter pollution from anthracite-fired boilers.
