Effect of excess air in a spreader stroker crushed coal fired water tube boiler

摘要

Raw water,electricity,process steam and cooling water are main utilities in a chemical process plant.The economy and profit of a chemical process industry is mainly depending upon the efficient generation and effective utilization of these utilities.Steam is generated from a boiler by combustion of fuel.A boiler(steam generator)is a container into which water can be fed and by applying heat,evaporated continuously into steam.In early designs the boiler was a simple shell with a feed pipe and steam outlet,mounted on a brick setting.Fuel was burnt on a grate within the setting and the heat so released was directed over the shell surface(similar to a kettle)before most of the heat was wasted out through the flue.Designers soon learned that heating a single large