Arrangement for and a method of controlling flow of solid particles and a fluidized bed reactor

An arrangement for controlling a flow of solid particles, the arrangement comprising:

• a vertical inlet pipe for directing the flow of solid particles downwards therein and having a bottom at a level L0;
• a first outlet chute and a second outlet chute in particle flow connection with the vertical inlet pipe;
• a fluidizing device for directing controlled first and second sub flows formed from the flow of solid particles to the first and second outlet chutes, respectively;
• a branch in particle flow connection with an opening on a side wall of the vertical inlet pipe for directing the first sub flow of solid particles to the first outlet chute, wherein the opening has a lower edge at a level L1 that is higher than L0, and the branch comprises a weir over which solid particles must flow to enter the first outlet chute;
• a horizontally extending intermediate pipe for directing the second sub flow of solid particles to the second outlet chute, the horizontally extending intermediate pipe comprising at least one nozzle for feeding fluidizing gas to the horizontally extending intermediate pipe and having a first end in particle flow connection with the bottom of the vertical inlet pipe at the level L0;
• and
• a vertically extending riser pipe with a bottom end in particle flow connection with a second end of the horizontally extending intermediate pipe, an upper end of the vertically extending riser pipe being in particle flow connection with the second outlet chute at a level L2 that is higher than L1.