Packing for improving contact between a gas phase and a dispersed solid phase moving in counter-current flow

Patent metadata

Field	Value
Publication number	US-11149208-B2
Application number	US-201716469318-A
Country	US
Kind code	B2
Filing date	Dec 5, 2017
Priority date	Dec 14, 2016
Publication date	Oct 19, 2021
Grant date	Oct 19, 2021

Abstract

The present invention describes a packing with a three-dimensional structure which is particularly suited to creating homogenous and anisotropic mixing between a gas phase and a dispersed solid phase moving in counter-current flow. Application of this packing to the stripper of fluidized catalytic cracking units.

First claim

The invention claimed is:

1. A packing effective to provide homogenous contact between a gas phase and a dispersed solid phase moving in counter-current flow, said packing comprising a three-dimensional structure consisting in a collection of rows of chevrons, these substantially parallel rows of chevrons being distributed between two planes the chevrons of which form an angle alpha of between 20 and 70° with respect to the horizontal, and each row of chevrons itself comprising an angle beta constituting the edge of the chevron, this angle beta being 60 to 120°, the width of a chevron being 3 to 40 cm, two rows of chevrons which are adjacent in a first plane being separated by a space approximately equal to the width of a row of chevrons, the rows of chevrons belonging to a second plane being located precisely in the gaps left free by the rows of chevrons of the first plane, so as to form a staggered structure, and said packing being placed between two filamentary meshes to which the ends of the rows of chevrons are welded to form a packing unit.

2. The packing with three-dimensional structure as claimed in claim 1 , wherein the edges of each row of chevrons are open, the width of said opening being 5% to 30% of the width of the chevrons.

3. The packing with three-dimensional structure as claimed in claim 1 , each row of chevrons comprising an angle beta constituting the edge of the chevron, this angle beta being 70 to 110°, the width of a chevron being 5 to 15 cm.

4. The packing with three-dimensional structure as claimed in claim 1 , wherein the edges of each row of chevrons are open, the width of said opening being 8% to 25% of the width of the chevrons.

5. The packing with three-dimensional structure as claimed in claim 1 , wherein the substantially parallel rows of chevrons are distributed between two planes the chevrons of which form an angle alpha of between 45 and 60°.

6. A catalytic cracking method comprising subjecting a hydrocarbon feed to the packing as claimed in claim 1 , said packing improving contact between an upflow gas phase and a downflow emulsion phase inside a stripper of a catalytic cracking unit, the method being conducted at a fluidization rate being of 10 cm/s to 40 cm/s and a solid flow of 10 to 250 kg/m 2 .s.

7. The catalytic cracking method as claimed in claim 6 , comprising cracking of heavy hydrocarbon fractions (R2R).

8. The catalytic cracking method as claimed in claim 6 , comprising cracking of light hydrocarbon fractions (NCC).

9. The catalytic cracking method as claimed in claim 6 , comprising deep catalytic cracking of hydrocarbon fractions (DCC).

10. The catalytic cracking method as claimed in claim 6 , conducted at a solid flow of 20 to 180 kg/m 2 .s.

11. A method of manufacturing the packing as claimed in claim 1 , using an additive manufacturing technique comprising selective laser melting, selective laser sintering, or fused deposition modeling.

Assignees

• Ifp Energies Now

Inventors

• Brahem Rim
• Amblard Benjamin
• Cloupet Ann
• Gauthier Thierry
• Raynal Ludovic

Classifications

• B01J19/32

  Packing elements in the form of grids or built-up elements for forming a unit or module inside the apparatus for mass or heat transfer · CPC title

• B01J2219/322

  Basic shape of the elements · CPC title

• C10G11/18 Primary

  according to the "fluidised-bed" technique · CPC title

• B01J2219/3306

  Dimensions or size aspects · CPC title

• B01J2219/32

  Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer · CPC title