Process and apparatus for chemical looping redox combustion with control of the heat exchanges

摘要

The invention relates to a process and an apparatus for chemical looping redox combustion of a hydrocarbon-based feedstock, in which the heat exchanges are controlled by a variation of the level of a dense fluidized bed of particles of active mass in an external heat exchanger (E1,E2), positioned on a line for transporting the particles circulating between a reduction zone (210) and an oxidation zone (200) respectively for reducing and oxidizing the particles in the chemical loop. The variation of the level of the bed is permitted by the controlled application of a pressure drop over an outlet of the fluidizing gas in the heat exchanger, said pressure drop being compensated by the variation of the level of a bed of particles of active mass in a reservoir zone located in the circuit of the particles in the chemical loop.