Fluidized bed boiler with multifunctional cyclone separator

The present invention relates to a fluidized-bed boiler with cyclone separator having double functions of separating and burning volatile component. Said separator includes an inlet section whose internal wall form is Venturi throat, external cyclone cylinder, exhaust cylinder and gas-burning air sleeve barrel mounted between external cyclone cylinder and exhaust cylinder, on the inlet section a gas-burning air hole is set, and the top of the gas-burning air sleeve barrel is equipped with hot air inlet. It can make the combustion space of fluidized-bed space be extended into the separator. 带有多功能旋风分离器的流化床锅炉，涉及一种燃烧低热值高挥发份燃料的流化床燃烧设备。本发明采用了具分离和燃尽挥发份双重功能的旋风分离器，该分离器包括一个其内壁形状为文丘里缩口的入口段，外旋风筒、排气筒以及设置在外旋风筒和排气筒之间的气体燃尽风套筒；在入口段上设有气体燃尽风口，在气体燃尽风套筒的顶部设有热空气入口。本发明将流化床锅炉的燃烧空间从传统的燃烧室扩展到分离器，既延长了烟气高温富氧流程，同时又不需要过度增加锅炉高度，便于将现有的流化床锅炉直接改造成燃用高挥发份燃料的锅炉。能够充分满足高挥发份燃料的燃烧要求，提高燃烧效率，降低锅炉烟气中有机类可燃成分的污染排放。