Device comprising lateral injections of liquid for limiting the phenomena of solid deposits in items of equipment with a conical bottom

Patent metadata

Field	Value
Publication number	US-11549074-B2
Application number	US-202017121977-A
Country	US
Kind code	B2
Filing date	Dec 15, 2020
Priority date	Oct 13, 2017
Publication date	Jan 10, 2023
Grant date	Jan 10, 2023

Abstract

A device for the descending flow of a hydrocarbon-containing liquid containing solid particles at the bottom of an item of equipment ( 1 ) and a process for the conversion of hydrocarbon-containing feedstocks implementing said device.

First claim

The invention claimed is:

1. A process for the conversion of hydrocarbon-containing feedstocks, comprising
achieving said conversion in a conversion unit producing an effluent, and
sending, as a feedstock, a hydrocarbon-containing liquid containing solid particles comprising compounds from said effluent to a device for descending flow of said hydrocarbon-containing liquid containing solid particles said device being situated in the lower part of an atmospheric or a vacuum distillation column,
said device comprising a cylindrical upper part ( 11 ) of diameter D 1 , a truncated-cone-shaped lower part ( 12 ) with an angle of inclination α of 5° to 85° with respect to the vertical axis (z) of said cylindrical upper part, an outlet pipe ( 9 ) of diameter D 2 , and
at least one injector ( 5 ) of recycled and/or makeup liquid into the truncated-cone-shaped part ( 12 ) of the item of equipment ( 1 );
at least one injector ( 6 ) of recycled and/or makeup liquid into the cylindrical part ( 11 ) of the item of equipment ( 1 );

said at least one injector ( 5 ) situated in said truncated-cone-shaped part being inclined with respect to the wall of the truncated-cone-shaped lower part at an angle β 1 in the vertical plane (xz) and at an angle β 2 in the horizontal plane (xy);
said at least one injector ( 6 ) situated in said cylindrical part being inclined with respect to the wall of the cylindrical upper part at an angle θ 1 in the vertical plane (xz) and at an angle θ 2 in the horizontal plane (xy),
wherein the angles β 1 and θ 1 are 5° to 175°, and the angles Γ 2 and θ 2 are 90° to 270°, the process comprising injecting recycled and/or makeup liquid by said at least one injector ( 5 ) into the truncated-cone-shaped part ( 12 ) and by said at least one injector ( 6 ) into the cylindrical part ( 11 ) at a velocity V of 0.05 m.s −1 to 40 m.s −1 .

2. The process according to claim 1 , wherein the device comprises a pipe ( 4 ) for recycling a part of the liquid leaving said outlet pipe ( 9 ), said recycling pipe ( 4 ) supplying recycled liquid to at least one of said at least one injectors ( 5 ) or ( 6 ).

3. The process according to claim 1 , wherein the device comprises a makeup pipe ( 10 ) for supplying makeup liquid to at least one of said at least one injectors ( 5 ) or ( 6 ).

4. The process according to claim 1 , wherein, in the device, said at least one injectors ( 5 ) and ( 6 ) are distributed by horizontal layers ( 7 ) in the truncated-cone-shaped part and by horizontal layers ( 8 ) in the cylindrical part, respectively.

5. The process according to claim 1 , wherein, in the device, the diameter D 1 of the cylindrical part and the diameter D 2 of the outlet pipe at the bottom of the truncated-cone-shaped part has a ratio (D 1 /D 2 ) of 1.1 to 1000.

6. The process according to claim 1 , wherein, in the device, the angle α is 10° to 70°.

7. The process according to claim 1 , wherein, in the device, the angles β 1 and θ 1 are 10° to 150°.

8. The process according to claim 1 , wherein, in the device, the angles β 2 and θ 2 are 90° to 180°.

9. The process according to claim 8 , wherein, in the device, the angles β 2 and θ 2 are equal to 90°.

10. The process according to claim 1 , wherein, in the device, the diameter D 1 is 0.1 m to 30 m.

11. The process according to claim 4 , wherein, in the device, height H between two horizontal layers is 0.01 m to 10 m.

12. The process according to claim 4 , wherein, in the device, 1 to 30 injectors N are present per layer.

13. The process according to claim 12 , wherein, in the device, 2 to 20 injectors are present per layer, said injectors within one and the same layer being spaced at an angle δ equal to 360/N, where N denotes the number of injectors per layer.

14. The process according to claim 13 , wherein, in the device, 2 to 10 injectors are present per layer.

15. The process according to claim 1 , comprising a hydroconversion step in an ebullating bed for feedstocks containing hydrocarbon fractions of which at least 50% by weight have a boiling temperature greater than 300° C.

16. The process according to claim 1 , wherein recycled and/or makeup liquid with respect to the hydrocarbon-containing liquid circulating in the atmospheric or a vacuum distillation column has an injection rate of 1% to 400%.

17. The process according to claim 1 , wherein the device is situated in the lower part of an atmospheric column.

18. The process according to claim 1 , wherein the device is situated in the lower part of a vacuum distillation column.

19. The process according to claim 1 , wherein the liquid injected by said injectors has a velocity V of 0.1 m.s −1 to 30 m.s −1 .

20. The process according to claim 1 , wherein the liquid injected by said injectors has a velocity V of 0.5 m.s −1 to 10 m.s −1 .

21. The process according to claim 1 , wherein recycled and/or makeup liquid with respect to the hydrocarbon-containing liquid circulating in the item of equipment has an injection rate of 5% to 100%.

22. The process according to claim 1 , wherein recycled and/or makeup liquid with respect to the hydrocarbon-containing liquid circulating in the item of equipment has an injection rate of 10% to 60%.

23. The process according to claim 1 , wherein recycled and/or makeup liquid with respect to the hydrocarbon-containing liquid circulating in the item of equipment has an injection rate of 20% to 50%.

24. The process according to claim 1 , wherein the conversion unit is an ebullating bed unit, or originates from a slurry hydroconversion process, or from a fixed bed, moving bed, or fluidized bed hydrotreatment process, or the effluent is a catalytic cracking (FCC) effluent, an effluent from a thermal conversion processes, coking or visbreaking, or from solvent deasphalting.

Assignees

• Ifp Energies Now

Inventors

• Amblard Benjamin
• Marques Joao
• Le Coz Jean-Francois

Classifications

• B01J2219/1943

  cylindrical · CPC title

• C10G51/04

  including only thermal and catalytic cracking steps · CPC title

• B01J8/1881

  with particles moving downwards while fluidised · CPC title

• C10G9/12

  Removing incrustation · CPC title

• B01J19/24 Primary

  Stationary reactors without moving elements inside (B01J19/08, B01J19/26 take precedence; with stationary particles B01J8/02) · CPC title