Circulating fluidized bed power plant with improved mixing of sorbents with combustion gases

In a circulating fluidized bed combustor comprising;

• a plurality of side walls defining a fluidized bed combustion chamber having a vertical orientation and a substantially rectangular cross-section;
• recirculating means including a separator connected by conduct means to a return inlet for recirculating fluidized solids through the combustion chamber;
• at least one nozzle disposed immediately above said return inlet for injecting steam outward from and adjacent to each side wall into said combustion chamber for inducing a circular flow of circulating material in said combustion chamber substantially perpendicular to the circulating flow as said circulating material flows upward through said chamber;
• and
• a source of high pressure steam for injecting at a high velocity through said nozzles for inducing said circular flow for improved mixing of gases and solids in said chamber.