Fluid dynamic regimes in circulating fluidized bed boilers—A mini-review

The fluid dynamics in the furnaces of large-scale circulating fluidized bed (CFB) boilers are surprisingly little known contrast to many laboratory studies made on conditions related chemical reactors. Two areas surveyed present work: bottom and upper dilute zone a furnace. is considered bubbling, but general opinion that either it does not exist, or turbulent. flow furnace phase transport, judging from regime maps, showing state outside range fast fluidization. However, this also generally accepted. Usually, fluidization CFB said be In one work even though authors agree different definition. another investigation called entrained flow. Here, conclusion diversity opinions should resolved by further investigations with aim defining for furnaces, including influence particle size density, velocity, gas properties, effects dimensions, if any.