Feed back device of circulating fluidized bed boiler

The utility model discloses a feed back device of circulating fluidized bed boiler relates to a circulating fluidized bed boiler main circulating loop system, including connecting gradually riser, descending branch and the ascending segment who is the U type to the bellows and the annex that reach the vertical section and locate the descending branch, it goes to the fields from the ascending segment slant still to include communicates the pipe chute to the vertical section. The utility model provides a tradition U valve structure is complicated and flow resistance that exist under high operating load is big, the not smooth problem of returning charge. 本实用新型公开了种循环流化床锅炉的回料装置，涉及种循环流化床锅炉主循环回路系统，包括依次连接呈U型的立管、下降段和上升段，以及垂直段和设于下降段的风箱及附件，还包括自上升段斜向下地连通至垂直段的斜管。本实用新型解决传统U阀结构复杂且在高运行负荷下存在的流动阻力大，返料不畅的问题。