ENERGY|coal and mining industries|coal industry
- dóchán scaire sreabhaí boilgearnaí Reference "Faofa ag an gCoiste Téarmaíochta, www.tearma.ie ;Faomhadh an téarma seo mar chuid de Thionscadal Lex"
- ga
- bubbling fluidised bed combustion | bubbling fluidised-bed combustion
- en
- Definition "fluidised bed combustion [ IATE:1107826 ] in which the combustion takes place under atmospheric or higher pressure, the bed expands to only one or two meters above the furnace floor and the gas velocity is increased until the whole bed becomes a turbulent mass of solids and bubbles, but there is no carry-over of bed material with the combustion gases" Reference "COM-Terminology Coordination, based on:Jenö Kovács. What are the main characteristics of fluidised bed combustors? IFRF Combustion Handbook, http://www.handbook.ifrf.net/handbook/cf.html?id=87 [17.3.2017] & CoalTech. Coal Technology. 1. End Use > 1.1 Power Generation > 1.1.2 Fluidised Bed, http://www.coaltech.com.au/FluidisedBed.html [17.3.2017]"
- Comment "When an evenly distributed air or gas is passed upward through a finely divided bed of solid particles such as sand supported on a fine mesh, the particles are undisturbed at low velocity. As air velocity is gradually increased, a stage is reached when the individual particles are suspended in the air stream – the bed is called “fluidized”.With further increase in air velocity, there is bubble formation, vigorous turbulence, rapid mixing and formation of dense defined bed surface. The bed of solid particles exhibits the properties of a boiling liquid and assumes the appearance of a fluid – “bubbling fluidized bed”.At higher velocities, bubbles disappear, and particles are blown out of the bed. Therefore, some amounts of particles have to be recirculated to maintain a stable system – “circulating fluidised bed”.FBC BOILERS. National Productivity Council of India, http://www.em-ea.org/guide%20books/book-2/2.6%20fbc.pdf [17.3.2017]"