Circulating fluidized bed reactor

A dynamic fluidized bed reactor apparatus for purifying and cooling hot gases, comprising:

• a fluidized bed reactor chamber having upper and lower ends and further having a means for fluidizing a bed of solid material, in which solid particles are at least partly carried pneumatically upwards through the reactor chamber in a solids-gas suspension, said reactor chamber further comprising a mixing chamber in said lower end;
• said fluidizing means being defined by a first inlet in said mixing chamber for introducing hot gases to be purified and cooled into said reactor;
• a second inlet for introducing solid process material into said reactor;
• a first outlet in the lower end of the reactor for removing solid process material from said reactor;
• a first horizontal cyclone separator disposed at the upper end of the reactor for separating solid material from said solids-gas suspension received from said reactor chamber through said first outlet, said solids-gas material passing into the horizontal cyclone separator tangentially to the circumference of a separator chamber of the horizontal cyclone separator;
• a return pipe connected to the circumference of the first horizontal cyclone separator for returning separated solid material to said mixing chamber;
• exhaust means at at least one end of the first horizontal cyclone separator for discharging purified gas from the separator;
• and
• cooling surface means extending between said mixing chamber and said first outlet of said reactor chamber cooperating with cooling means in said reactor chamber for cooling said solids-gas suspension in the reactor as said solids-gas suspension flows from said mixing chamber to said first outlet.