Mixing and distribution device comprising a distribution plate with peripheral openings

Patent metadata

Field	Value
Publication number	US-10010843-B2
Application number	US-201615084669-A
Country	US
Kind code	B2
Filing date	Mar 30, 2016
Priority date	Apr 1, 2015
Publication date	Jul 3, 2018
Grant date	Jul 3, 2018

Abstract

Device for the mixing and distribution of fluids for a catalytic reactor with a downward flow, said device comprising a collection zone (A), a mixing zone (B) and a distribution zone (C) comprising a distribution plate ( 12 ) comprising at least one first zone (C 1 ) supporting a plurality of chimneys ( 13 ) and a second zone (C 2 ); said mixing zone (B) is comprised in an annular enclosure ( 15 ) situated in the distribution zone (C), said mixing (B) and distribution (C) zones being delimited by at least one annular wall ( 16 ) comprising at least one lateral passage section ( 17 a , 17 b ) suitable for the passage of the fluids from said mixing zone (B) to the first zone (C 1 ) of said distribution zone (C), and the second zone (C 2 ) comprises a plurality of openings ( 18 ) suitable for the partial passage of the fluids out of the distribution zone (C).

First claim

The invention claimed is:

1. Device for the mixing and distribution of fluids for a catalytic reactor with a downward flow, said device comprising:
at least one collection zone (A) comprising at least one collection means ( 5 );
at least one substantially vertical collection line ( 7 ) suitable for receiving a reaction fluid collected by said collection means ( 5 ) and at least one injection means ( 8 ) opening into said collection line ( 7 ) for injecting a quench fluid;
at least one mixing zone (B), situated downstream of the collection means ( 5 ) in the direction of circulation of the fluids, said mixing zone (B) comprising at least one mixing chamber ( 9 ) connected to said collection line ( 7 ) and an outlet end ( 10 ) for removing the fluids;
at least one distribution zone (C), situated downstream of said mixing zone (B) in the direction of circulation of the fluids, comprising a distribution plate ( 12 ) extending radially over the entire section of the enclosure of the reactor, said distribution plate ( 12 ) comprising at least one first zone (C 1 ) supporting a plurality of chimneys ( 13 ) and a second zone (C 2 );

characterized in that said mixing zone (B) is comprised in an annular enclosure ( 15 ) situated in the distribution zone (C), said mixing (B) and distribution (C) zones being delimited by at least one annular wall ( 16 ) comprising at least one lateral passage section ( 17 a , 17 b ) suitable for the passage of the fluids from said mixing zone (B) to the first zone (C 1 ) of said distribution zone (C), and in that the second zone (C 2 ) of said distribution zone (C) comprises a plurality of openings ( 18 ) suitable for the partial passage of the fluids out of the distribution zone (C).

2. Device according to claim 1 , characterized in that said annular enclosure ( 15 ) is situated at a distance D from the distribution plate ( 12 ) comprised between 50 and 200 mm.

3. Device according to claim 1 , characterized in that said annular wall ( 16 ) of said annular enclosure ( 15 ) is positioned at a distance d 2 from the enclosure of the reactor, the distance d 2 varying from 2% to 20% of the diameter of the reactor.

4. Device according to claim 1 , characterized in that said mixing chamber ( 9 ) is positioned at a distance d 1 from the enclosure of the reactor, said distance d 1 being comprised between 5 and 300 mm.

5. Device according to claim 1 , characterized in that the height of said annular enclosure ( 15 ) is comprised between 200 and 800 mm.

6. Device according to claim 1 , characterized in that the annular wall ( 16 ) comprises a plurality of lateral passage sections ( 17 a , 17 b ) distributed over at least two levels.

7. Device according to claim 1 , characterized in that the annular wall ( 16 ) of the annular enclosure ( 15 ) is substantially cylindrical.

8. Device according to claim 1 , characterized in that the cross-section of the mixing chamber ( 9 ) is a parallelogram section.

9. Device according to claim 8 , characterized in that the section of the mixing chamber ( 9 ) presents a ratio between the height “h” of the section and the width “w” of said section comprised between 0.2 and 5.0.

10. Device according to claim 1 , characterized in that said mixing chamber ( 9 ) is of circular section and is such that the diameter “d” of said mixing chamber is comprised between 0.05 and 0.5 m.

11. Device according to claim 1 , characterized in that it comprises two mixing chambers ( 9 ).

12. Device according to claim 1 , characterized in that said mixing chamber ( 9 ) comprises at least one means for deflecting the fluids on at least one of the internal walls of said mixing chamber.

13. Device according to claim 1 , characterized in that it also comprises a dispersal system arranged below said distribution plate ( 12 ), said dispersal system comprising at least one dispersal device ( 19 ).

14. Device according to claim 1 , characterized in that said mixing (B) and distribution (C) zones are delimited by two annular walls ( 16 ) each comprising at least one lateral passage section ( 17 a , 17 b ) suitable for the passage of the fluids from said mixing zone (B) to the first zone (C 1 ) of said distribution zone (C).

15. Catalytic reactor with a downward flow comprising an enclosure ( 1 ) containing at least two fixed catalyst beds ( 2 , 14 ) separated by an intermediate zone comprising a device for the mixing and distribution of fluids according to claim 1 .

Assignees

• Ifp Energies Now

Inventors

• Beard Philippe
• Bazer-Bachi Frederic
• Plais Cecile
• Augier Frederic
• Haroun Yacine

Classifications

• B01J8/0446 Primary

  the flow within the beds being predominantly vertical · CPC title

• B01J8/0278

  Feeding reactive fluids (for solid material B01J8/0015) · CPC title

• B01J2208/00823

  Mixing elements · CPC title

• B01J8/0453 Primary

  the beds being superimposed one above the other · CPC title

• B01J2208/00362

  Liquid · CPC title