Cyclone for a chemical looping combustion facility and method provided with an inlet duct having sloped walls and gas injection
AssigneesIfp Energies Nouvelles, Totalenergies Onetech
InventorsSina TEBIANIAN, Thierry GAUTHIER, Florent GUILLOU
Life of this patent
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Abstract
The present invention relates to a cyclone for gas/solid separation in a plant for chemical looping combustion of a hydrocarbon feedstock using reactors operating as circulating fluidized beds. The novel cyclone has a specific inlet pipe of which a lower wall and one of the lateral walls are inclined and which has at least one auxiliary-gas injection means at the lower wall, making it possible to reduce the deposition of solid matter at the inlet of the cyclone, to optionally carry out chemical reactions inside the cyclone, and to improve the efficiency of the cyclone.
Claims20
A cyclone (200) for a plant for chemical looping redox of a hydrocarbon feedstock using at least one reactor operating as a circulating fluidized bed, comprising:
- an inlet pipe (21) for a gas mixture (2) comprising solids particles coming from a reactor (100, 300) of the plant, this inlet pipe having at one end an inlet opening (O) of rectangular cross section and at its other end an outlet opening(S) of rectangular cross section,
- a cylindrical-conical chamber (22) having a cylindrical upper portion (22a) surmounting an inverted frustoconical lower portion (22b), said cylindrical upper portion (22a) having the outlet opening(S) of the inlet pipe;
- an outlet pipe (23) for a particle-depleted gas stream (3), this pipe being positioned at the top of the cylindrical upper portion;
- a discharge pipe (24) for discharging a stream of solids particles (4), this pipe being positioned at the bottom of the inverted frustoconical lower portion (22b);
- and
- wherein said inlet pipe (21) is delimited by:
- a planar upper wall (25) in a horizontal plane (XY),
- a planar lower wall (26) inclined by an angle α with respect to the planar upper wall (25), said angle α being defined in a vertical plane (XZ) and such that the dimension along a vertical axis (Z) of the outlet opening S of the inlet pipe is less than the dimension along a vertical axis (Z) of the inlet opening O,
- a vertical planar outer lateral wall (27) in the vertical plane (XZ), this wall being tangent to the cylindrical upper portion of the cylindrical-conical chamber, and
- a vertical planar inner lateral wall (28) inclined by an angle β with respect to the outer lateral wall (27), said angle β being defined in the horizontal plane (XY), and such that the dimension along an axis (Y) of the outlet opening S of the inlet pipe is less than the dimension along an axis (Y) of the inlet opening O, and said inlet pipe (21) has at least one auxiliary-gas injection nozzle which is situated on the planar lower wall.
Dependencies are inferred from the claim text.