The invention relates to a method and a device for the quick
pyrolysis of
solid heat carriers; the device comprises a circulating
fluidized bed combustor, a
cyclone separator, an aerodynamic hot ash
distributor, a
pyrolysis chamber and a differential
bed material return device; fuel is burnt in the circulating
fluidized bed combustor, the high-temperature circulation ash of
flue gas collected by the
cyclone separator is divided into two parts by the hot ash
distributor aerodynamically controlled, one part enters the
pyrolysis chamber of a
moving bed as the
solid heat carrier to supply heat for
flue pyrolysis, the other part does not enter the pyrolysis chamber but returns to the
combustor, together with the semicoke and circulation ash discharged from the bottom of the pyrolysis chamber through the differential
bed material return device. The method and the device for the quick pyrolysis of
solid heat carrier provided by the invention can distribute the high-temperature circulation ash between
combustion and pyrolysis loops stably and reliably, with controllable temperature of the pyrolysis chamber, strengthen the balance capacity between
combustion and pyrolysis by virtue of a hot ash cooler, have good adaptability of the
flue, and can be used for the pyrolysis of
coal,
biomass and other carbonaceous refuses.