System for self-sustaining combustion of iron particles and method thereof

A continuous combustion system for iron particles comprising

• a multi-annular combustion tube having an inlet and an outlet, the multi-annular combustion tube defining in cross-section at least three distinct passages from the inlet to the outlet;
• the multi-annular tube comprising:
• a first tube that is innermost, the first tube defining a first passage providing a primary air flow wherein the iron particles are suspended in the primary air flow;
• a second tube, outside the first tube defining a second passage that is an inner annular space defined between the first tube and the second tube, wherein the inner annular space provides a secondary air flow and a pilot combustible flow, the inner annular space further comprises an ignition point of a spark generator, and
• a third tube, the third tube positioned outside the second tube defining a third passage that is an outer annular space defined between the second tube and the third tube, wherein the outer annular space comprises a swirl generator and provides a tertiary air flow;
• the first tube, the second tube and the third tube nested in position within the multi-annular combustion tube;
• a divergent nozzle at the outlet of the multi-annular combustion tube;
• a combustion reactor, comprising a reactor outlet opposite a reactor inlet, in fluid communication and hydraulically connected with the divergent nozzle at the reactor inlet, for the generation and stabilization of a turbulent iron flame that burns the iron particles and produces oxidized iron particles;
• and
• a cyclone having a cyclonic inlet, a gas outlet and a particle outlet, wherein the cyclonic inlet is in fluid communication with the reactor outlet.