Chemical looping combustor using magnetic oxygen carrier particles and loop seal equipped with magnetic separator

A method of separating ash,

• the method comprising the steps of encouraging the ash and magnetic oxygen carrier particles, discharged from a reducer, to flow into the downward pipe of a duct and flow down by gravity;
• encouraging the ash and magnetic oxygen carrier particles to flow into an upward pipe bent and connected at the end of the lower portion of the downward pipe and to flow up towards the upper portion of the upward pipe;
• separating the ash from the magnetic oxygen carrier particles by magnetic material of a magnetic separator equipped at the end of the upper portion of the upward pipe;
• and
• discharging the ash, discharged from the magnetic separator through an ash discharge pipe and encouraging the magnetic oxygen carrier particles, separated by the magnetic separator, to flow into an oxidizer.

A method of operating the SF-CLC,

• the method comprising the steps of capturing oxygen while magnetic oxygen carrier particles are fluidized in an oxidizer;
• separating the gases from the magnetic oxygen carrier particles, discharged from the oxidizer, in an oxidizer cyclone;
• bringing about gasification of solid fuel by reduction fluidization gases and combustion by the magnetic oxygen carrier particles, separated and supplied by the oxidizer cyclone, in a reducer;
• discharging the ash and magnetic oxygen carrier particles through the solid-mixture discharge pipe of the reducer and encouraging the ash and magnetic oxygen carrier particles to flow into a solid cooler;
• cooling the ash and magnetic oxygen carrier particles in the solid cooler;
• and
• encouraging the magnetic oxygen carrier particles and ash, cooled in the solid cooler, to flow into a loop seal separator, separating the magnetic oxygen carrier particles from the ash by magnetic material, discharging the ash through an ash discharge pipe and recirculating the magnetic oxygen carrier particles along with gases through an oxygen-carrier-particle discharge pipe.