FLUIDIZED BED BOILER REINFORCED IN BED AND CONDUCTING RECIRCULATION

摘要

Fluidized bed boiler with strong inverse flow in bed, it is on existing bubbling-bed boiler structure basis, changes the pattern of blast cap on the distribution grid partly, the one-sided perforate blast cap of one to three row is adopted in the zone of promptly causing backflow at needs.The air that flows out in these blast caps forms one nearly distribution grid horizonally projected jet, reflux thereby above the fluerics, form in the stable and strong bed, this backflow can make the burn-out degree of thin fuel improve, the utilization rate of microlith lime stone grain improves, and the heating surface and the furnace wall wearing and tearing that are in the sloping portion of recirculating zone alleviate.