Device and method for chemical looping combustion, having a particle separator provided with an inclined intake duct

Patent metadata

Field	Value
Publication number	US-2021356120-A1
Application number	US-201917278399-A
Country	US
Kind code	A1
Filing date	Sep 13, 2019
Priority date	Sep 20, 2018
Publication date	Nov 18, 2021
Grant date	—

Abstract

The present invention relates to a device and a method for chemical looping combustion, for which the end of the intake duct (4) opening out within the chamber of the separator (1) is inclined with respect to a horizontal plane (H).

First claim

1 . A device for chemical looping combustion using a solid fuel which generates unburnt particles and employs oxygen carrier particles, such as metal oxides, and which comprises at least a combustion zone, a separator for particles contained in a gas mixture from the combustion zone, and a gas-solid separator, the particle separator comprising a chamber equipped with at least one intake duct connected to the combustion zone, at least one discharge duct situated in the lower part of the chamber, and at least one outlet duct situated in the upper part of the chamber and connected to the gas-solid separator, the chamber comprising a dense phase in the lower part and a dilute phase in the upper part, characterized in that the intake duct comprises an intake end which is inclined by an angle α with respect to a horizontal plane (H), the intake end opening out within the chamber.

2 . The combustion device as claimed in claim 1 , wherein the angle α is between 10 and 70°, preferably between 30 and 50°.

3 . The combustion device as claimed in claim 1 , wherein the intake duct comprises successively, in the intake direction, a vertical portion, an elbow, and the inclined intake end.

4 . The combustion device as claimed in claim 3 , wherein the vertical portion of the intake duct is at a distance D from the center of the chamber, D being strictly positive and less than 4 A, preferably less than 2 A and more preferably less than 1.5 A, where A is a dimension between the center of the chamber and a sidewall of the chamber.

5 . The combustion device as claimed in claim 3 , wherein the diameter C of the inclined intake end is between 0.5 and 4 L, preferably between 1 L and 3 L, more preferably between 1 L and 2 L, where L is the diameter of the vertical portion of the intake duct.

6 . The combustion device as claimed in claim 1 , wherein the intake duct is entirely external to the chamber, the intake end opening out on a sidewall of the chamber.

7 . The combustion device as claimed in claim 1 , wherein the intake duct is at least partly internal to the chamber, the intake duct passing through the lower wall of the chamber.

8 . The combustion device as claimed in claim 1 , wherein the particle separator comprises between 1 and 20, preferably between 1 and 10 and more preferably between 1 and 4 intake ducts.

9 . The combustion device as claimed in claim 1 , wherein the intake duct opens out in the chamber, in the upper part of the chamber comprising the dilute phase.

10 . The combustion device as claimed in claim 1 , wherein the inclination of the intake end of the intake duct is directed toward the longitudinal axis of the chamber.

11 . A method for chemical looping combustion using a solid fuel generating unburnt particles, which employs oxygen carrier particles, such as metal oxides, and employs a device for chemical looping combustion as claimed in claim 1 , wherein the following steps are carried out:
a) a gaseous mixture from the combustion zone, comprising particles and combustion gases, is admitted to the chamber of the particle separator by means of at least one intake duct; b) the lightest particles, consisting predominantly of the unburnt particles, are extracted via an outlet in the upper part of the chamber, and the heaviest particles, consisting predominantly of the oxygen carrier particles, are discharged via the discharge duct in the lower part of the chamber; c) a gaseous stream comprising the light unburnt particles extracted via the outlet duct in the upper part of the chamber are sent to the gas-solid separator; d) a gas depleted in unburnt particles is discharged from the gas-solid separator via a duct; and e) the unburnt particles separated in the gas-solid separator are recycled to the combustion zone via a communication duct.

Assignees

• Ifp Energies Now
• Total Raffinage Chimie

Inventors

• Tilland Airy
• Amblard Benjamin
• Tebianian Sina
• Cloupet Ann
• Guillou Florent
• Bertholin Stephane
• Yazdanpanah Mahdi

Classifications

• Y02E20/34

  Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery · CPC title

• F23C10/10 Primary

  the separation apparatus being located outside the combustion chamber · CPC title

• F23C2206/10

  Circulating fluidised bed · CPC title

• F23C2900/10001

  Use of special materials for the fluidized bed · 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