Chemical looping combustion method and plant with independent solid circulation control

摘要

The invention relates to an improved plant and method for chemical looping combustion of at least one hydrocarbon feed with independent control of the circulation of the solid active mass particles between the fluidized bed reaction zones, by means of one or more non-mechanical valves of L-valve type.

主权项

1. A chemical looping combustion method for at least one hydrocarbon feed in at least one distinct fluidized bed reduction reaction zone (i) and at least one distinct fluidized bed oxidation reaction zone (i+1), wherein the circulation of the solid particles of active mass between each or part of the reaction zones is controlled by means of one or more non-mechanical valves consisting each of a substantially vertical line portion, a substantially horizontal line portion and an elbow connecting the two portions, by transporting the solid particles between two successive reaction zones by:
introducing solid particles coming from reaction zone (i) or (i+1) through the upper end of the substantially vertical line portion of said valve, injecting a control gas with a given aeration flow rate upstream from the elbow of said valve, controlling the differential pressure conditions at the terminals of the non-mechanical valve(s) so as to adjust the flow rate of the solid particles in the substantially horizontal line portion of said valve, according to the aeration flow rate, feeding into the successive reaction zones (i+1) or (i) of the loop the solid particles leaving the non-mechanical valve(s).