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

Patent metadata

Field	Value
Publication number	US-10307768-B2
Application number	US-201715498766-A
Country	US
Kind code	B2
Filing date	Apr 27, 2017
Priority date	Apr 3, 2017
Publication date	Jun 4, 2019
Grant date	Jun 4, 2019

Abstract

The present invention relates to a CLC and operation method thereof equipped with a loop seal separator using magnetic oxygen carrier particles and a magnetic separator. And more particularly, the present invention relates to a loop seal separator using magnetic oxygen carrier particles and a magnetic separator, wherein the loop seal separator comprises a duct into which the ash and magnetic oxygen carrier particles, discharged from a reducer, flow; a magnetic separator to separate the ash from the magnetic oxygen carrier particles, flowing into the duct, by magnetic material; an ash discharge pipe to discharge the ash, separated by the magnetic separator; and an oxygen-carrier-particle discharge pipe to encourage the magnetic oxygen carrier particles, separated by the magnetic separator, to flow into an oxidizer.

First claim

The invention claimed is:

1. A loop seal separator using magnetic oxygen carrier particles and a magnetic separator,
the loop seal separator comprising:
a duct into which ash and magnetic oxygen carrier particles, discharged from a reducer, flow;
a magnetic separator to separate the ash from the magnetic oxygen carrier particles, flowing into the duct, by magnetic material;
an ash discharge pipe to discharge the ash separated by the magnetic separator; and
an oxygen-carrier-particle discharge pipe to encourage the magnetic oxygen carrier particles, separated by the magnetic separator, to flow into an oxidizer;
the duct comprising a downward pipe wherein the length direction of the downward pipe is the vertical direction and the ash and magnetic oxygen carrier particles, flowing into the duct, flow down towards the lower portion of the downward pipe by gravity; and
an upward pipe wherein the length direction of the upward pipe is the vertical direction and the upward pipe is bent and connected at the end of the lower portion of the downward pipe to encourage the ash and magnetic oxygen carrier particles to flow up towards the upper part of the upward pipe.

2. The loop seal separator using magnetic oxygen carrier particles and a magnetic separator according to claim 1 ,
wherein a fluidization-gas supplying device is equipped, at the part where the downward pipe and upward pipe are connected, to inject fluidization gases for cooling and fluidization.

3. The loop seal separator using magnetic oxygen carrier particles and a magnetic separator according to claim 1 ,
wherein the magnetic oxygen carrier particles are slag balls where slag is manufactured in the form of a sphere by automization.

4. The loop seal separator using magnetic oxygen carrier particles and a magnetic separator according to claim 3 ,
wherein the slag balls are magnetic in both oxidized and reduced states and are copper slag balls containing Fe 2 O 3 .

5. The loop seal separator using magnetic oxygen carrier particles and a magnetic separator according to claim 1 ,
wherein the magnetic separator is connected to the end of the upper portion of the upward pipe, and
wherein the magnetic separator comprises magnetic material in the form of a panel;
a conveyor belt contacted by the magnetic oxygen carrier particles by magnetic forces of the magnetic material;
a conveyor driving device to drive the conveyor belt; and
a detaching device to remove the magnetic oxygen carrier particles contacting the conveyor belt and to encourage the magnetic oxygen carrier particles to flow into the oxygen-carrier-particle discharge pipe.

6. 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;
the method of separating each other, wherein the ash does not contact a conveyor belt in the upward pipe and is discharged through the ash discharge pipe, while the magnetic oxygen carrier particles contact the conveyor belt by magnetic forces of magnetic material, flow up towards the upper portion of an oxygen-carrier-particle discharge pipe and are removed by a detaching device and then discharged through an oxygen-carrier-particle discharge pipe.

7. An SF-CLC comprising:
an oxidizer to capture oxygen while magnetic oxygen carrier particles are fluidized;
an oxidizer cyclone to separate the gases from the magnetic oxygen carrier particles, discharged from the oxidizer;
a reducer to bring about gasification of solid fuel by reduction fluidization gases and combustion by the magnetic oxygen carrier particles, separated and supplied by the oxidizer cyclone, and to discharge the ash and reduced magnetic oxygen carrier particles;
a loop seal separator according to claim 1 to separate the magnetic oxygen carrier particles from the ash, supplied by the oxidizer, and to encourage only the magnetic oxygen carrier particles to flow into the oxidizer; and
a solid cooler, equipped between the reducer and loop seal separator, to cool the magnetic oxygen carrier particles and ash, discharged from the solid-mixture discharge pipe of the reducer, and then to encourage the magnetic oxygen carrier particles and ash to flow into the duct of the loop seal separator.

8. The SF-CLC according to claim 7 ,
wherein the solid cooler takes the form of a fluid bed and comprises a cooling-gas supply pipe equipped at the lower portion of the solid cooler to supply cooling gases for cooling and fluidization, a part into which solid-mixture flows connected to the solid-mixture discharge pipe, a solid-cooler discharge pipe equipped on one side of the upper portion of the solid cooler and a discharge part connected to the duct of the loop seal separator.

9. The SF-CLC according to claim 8 , further comprising:
a reducer cyclone to separate the gases from the mixture of ash and oxygen carrier particles, discharged from the reducer, and to return the oxygen carrier particles to the reducer.

10. The SF-CLC according to claim 9 , further comprising:
a solid-cooler cyclone to separate the gases from the mixture of ash and oxygen carrier particles, discharged from the solid cooler, and to return the mixture of ash and oxygen carrier particles to the solid cooler.

11. 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; and
the method of circulation comprising the steps of encouraging the ash and magnetic oxygen carrier particles, discharged from a solid cooler, to flow into the downward pipe of a duct and to 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 pip, 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, separated by

Assignees

• Korea Inst Energy Res

Inventors

• Ryu Ho-Jung
• Han Keun-Hee
• Jin Gyoung-Tae
• Yi Chang-Keun
• Shun Do-Won
• Park Jae-Hyeon
• Bae Dal-Hee
• Jo Sung-Ho
• Lee Seung-Yong
• Park Young Cheol
• Moon Jong-Ho
• Lee Do Yeon
• Lee Hyo Jin
• Lee Dong-Ho
• Baek Jeom In

Classifications

• B03C1/30

  Combinations with other devices, not otherwise provided for · CPC title

• F23C10/005

  comprising two or more beds · CPC title

• Y02E20/346

  Cross-Sectional Technologies · mapped topic

• F23K2201/30

  Separating · CPC title

• F23C2900/99008

  Unmixed combustion, i.e. without direct mixing of oxygen gas and fuel, but using the oxygen from a metal oxide, e.g. FeO · CPC title