A typical coal-fired power plant has multiple generating units, each with its own steam generating boiler. Usually, coal is pulverized by a combination of crushing and grinding until a desired
degree of fineness is achieved. The coal is sieved, and dried using heated air before it is conveyed to a furnace where it is burned to produce steam. Steam pressure and temperature are specifically
related, as steam’s temperature rises with increasing steam pressure. The pressure and temperature of the steam produced have been rising steadily over the years, ranging from yesterday’s sub-critical units to today’s ultra-super critical units.