一、引言 循环流化床以其独特的运行方式受到能源等领域的重视,循环流化床结构也正在不断地改进。和以往的床体结构相比,我们拟在悬浮段中增加了切向二次风,并考虑在床体出口处加添缩口。通常循环流化床锅炉所使用的旋风分离器直径很大,这使循环流化床整个装置的体积和造价都有所增加。上述改进后的实验装置希望通过增加颗粒在炉内停留时间以及减小扬析来达到在循环流化床内分离颗粒的目的,并降低造价同时还能提高 First, the introduction of circulating fluidized bed with its unique mode of operation subject to energy and other fields, circulating fluidized bed structure is also constantly improving. Compared with the previous bed structure, we intend to increase the tangential secondary air in the suspension section, and consider adding a necking at the exit of the bed. Cyclone separators used in circulating fluidized bed boilers are typically large in diameter, which increases the size and cost of the entire unit in a circulating fluidized bed. The above improved experimental device hopes to increase the particle residence time in the furnace and reduce Yang Yan to achieve the purpose of separating particles in the circulating fluidized bed and reduce the cost while improving