DEVICE FOR CAPTURING A TARGET GAS AND METHOD FOR OPERATING THE DEVICE

摘要

The present invention relates to a device for capturing a target gas from a gas stream. The device comprises two countercurrent multistage fluidized bed reactors (1, 2), and a first solid particles feed (8, 14, 18, 24) and a second solid particles feed (7, 13, 17, 23). The first solid particles feed (8, 14, 18, 24) extends from the bottom of the second reactor to the top of the first reactor to transport solid particles from the second reactor (2) to the first reactor (1). The second solid particles feed (7, 13, 17, 23) extends from the bottom of the first reactor to the top of the second reactor to transport solid particles from the first reactor (1) to the second reactor (2). The first and second reactor comprise sieve plates and/or nozzle plates (35), with downcomers (37) and preferably overflow weirs (36). The downcomers (37) comprise one or more mechanical devices, preferably one or more adjustable mechanical flaps (38) and/or one or more slides (39), for control of the downcomer pressure drop.