SAND FALLING TYPE CIRCULATING FLUIDIZED BED BOILER HAVING A PLURALITY OF RISER AND ITS OPERATION METHOD

摘要

The present invention relates to a flow yarn descending type circulating fluidized bed boiler having a plurality of risers and a method of operating the same, more specifically, to prevent erosion and corrosion of water pipes and to flow with a plurality of risers to increase combustion efficiency. It relates to a down-flow circulating fluidized bed boiler and its operating method. The present invention is a boiler unit provided so that the fuel and oxidant is introduced therein; A riser unit which is connected to the boiler unit and is provided so that the fuel and flow yarn provided from the boiler unit flows in and rises from the lower side; And a relay unit provided to be connected to the upper portion of the boiler unit and the riser unit to provide a fluidized yarn passing through the riser unit to the boiler unit, wherein the fuel is supplied from the upper side of the boiler unit to descend and burn. Provided is a fluidized yarn descending type circulating fluidized bed boiler having a plurality of risers.