Dense-phase region bottom slag balance and biomass fuel less oxygen ventilation structure applied in burning biologic material fluid bed boiler

The invention discloses a dense-phase region bottom slag balance and biomass fuel less oxygen ventilation structure applied in a burning biologic material fluid bed boiler. The structure is provided with ventilation bed surfaces with different heights and a certain height difference in a boiler furnace, wherein the low level is a high speed bed, and the high level is a low speed bed; and a high speed bed region is internally provided with a plurality of gap trapezoid throttle air blocking peduncles, a middle bulge position is a biomass fuel carbonization region, the two sides of the middle bulge position are high-speed stream regions, gap regions of the trapezoid throttle air blocking peduncles are provided with large caliber deslagging devices, the upper ends of the bulge position of the air blocking peduncles of the side wall of a furnace chamber are provided with negative pressure feeders, and the middle of the furnace chamber is also provided with multiple layers of secondary air supply outlets. The dense