Interior circulating fluidized bed boiler of multi -furnace thorax structure

The utility model provides an interior circulating fluidized bed boiler of multi -furnace thorax structure mainly includes high -speed bed, low -speed bed, air distribute device, soaks heating surface, multilayer negative pressure dispenser and furnace, designing a plurality of furnace, setting up the bed surface of height echelonment in every furnace, the low level is high -speed bed, the high -order low -speed bed that is, air distribute device is including high -speed bed plenum and low -speed bed plenum, high -speed bed adopts plane air distribution plate structure and below to link to each other with high -speed bed plenum, the low -speed bed is arranged respectively and is soaked heating surface and soak the over heater, fuel gets into high -speed bed from multilayer negative pressure dispenser, and the inertia material of fuel and high -speed bed bed surface is in fluidizing air effect high -speed fluidization down, with low -speed bed material formation top -down's inner loop stream. The utility model