Device with circulating fluidized bed and recycling process of fine particles within this device

摘要

In the present invention, there is disclosed a circulating fluidized bed unit having a reactor, at least one solids separator (100) positioned downstream of the reactor, and a solids recirculation loop (175), the circulating fluidized bed unit having increased finest reagent particle recovery, comprising: a solids collection hopper (160) connected to the at least one solids separator (100) and connected to the solids recirculation loop (175); at least one conduit (150) connecting an upper portion of the solids collection hopper (160) to the reactor, the hopper (160) end of the at least one conduit (150) in communication with the solids collection hopper (160) at a location above the connection of the solids collection hopper (160) to the solids recirculation loop (175); and gas recirculation means (170) provided for the at least one conduit (150) for recycling gas carrying finest reagent particles from the upper portion of the solids collection hopper (160) to the reactor.