ABSTRACT
Gas-solid separation plays an important role in the performance of fluidized bed boilers. These are
used in both bubbling (BFB) and circulating fluidized beds (CFB). Gas-solid separators are used in
two different locations of a power plant for two distinct purposes. Bag-houses or electrostatic
precipitators are used at the relatively cold downstream end of the boiler to reduce the boiler’s
particulate emission, while cyclone and other types of separators are used within the CFB boiler
loop to aid in the circulation of hot solids through the furnace and, in a BFB or gasifier, to improve
carbon conversion. The present chapter discusses the principles of gas-solid separation, with
special emphasis on cyclone, inertial, and impingement separators.
