Mixing and distribution device with mixing and exchange zones and deflectors

Patent metadata

Field	Value
Publication number	US-10065166-B2
Application number	US-201715499965-A
Country	US
Kind code	B2
Filing date	Apr 28, 2017
Priority date	Apr 29, 2016
Publication date	Sep 4, 2018
Grant date	Sep 4, 2018

Abstract

A fluid mixing and distribution device for a catalytic downflow reactor, said device comprising a collection zone (A), a mixing zone (B) comprising a mixing chamber ( 15 ) for fluids and an exchange chamber ( 16 ) for fluids, a distribution zone (C), said exchange chamber ( 16 ) comprising at least one upper lateral cross-section of flow ( 17 a ) and at least one lower lateral cross-section of flow ( 17 b ) through which fluids can pass from said exchange chamber ( 16 ) to said distribution zone (C), characterized in that said exchange chamber ( 16 ) comprises a fluid deflection means ( 24 ) fixed to said exchange chamber ( 16 ) and located downstream of the upper lateral cross-section of flow ( 17 a ), said fluid deflection means ( 24 ) forming with said exchange chamber ( 16 ) a space ( 26 ) in the shape of a pan.

First claim

The invention claimed is:

1. A device for mixing and distributing fluids for a catalytic downflow reactor, said device comprising:
at least one collection zone (A) comprising at least one collection means ( 5 );
at least one substantially vertical collection conduit ( 7 ) which is capable of receiving a process fluid collected by said collection means ( 5 ) and at least one injection means ( 8 ) opening into said collection conduit ( 7 ) in order to inject a quench fluid;
at least one mixing zone (B) located downstream of said collection conduit ( 7 ) in the direction of fluid movement and in communication with said collection conduit ( 7 ), said mixing zone (B) comprising at least one fluid mixing chamber ( 15 );
at least one distribution zone (C), located downstream of said mixing zone (B) in the direction of fluid movement, comprising a distributor plate ( 12 ) supporting a plurality of risers ( 13 ), which are open at their upper ends via an upper opening and which have a series of lateral orifices ( 21 ) along their lateral walls;

said mixing zone (B) being located at the same level as the distribution zone (C) and further comprising at least one fluid exchange chamber ( 16 ) connected to and in communication with said mixing chamber ( 15 ), said exchange chamber ( 16 ) comprising at least one upper lateral cross-section of flow ( 17 a ) and at least one lower lateral cross-section of flow ( 17 b ) for the passage of fluids from said exchange chamber ( 16 ) to said distribution zone (C), characterized in that said exchange chamber ( 16 ) further comprises a means for deflecting fluids ( 24 ) fixed on said exchange chamber ( 16 ) and located downstream of at least one upper lateral cross-section of flow ( 17 a ) in the direction of fluid movement, said fluid deflection means ( 24 ) forming a space ( 26 ) with said exchange chamber ( 16 ) which is in the form of a pan.

2. The device as claimed in claim 1 , characterized in that said mixing chamber ( 15 ) is located above said exchange chamber ( 16 ).

3. The device as claimed in claim 1 , characterized in that the upper end of said fluid deflection means ( 24 ) is located above the last level of lateral orifices ( 21 ) of said risers ( 13 ) with respect to the distributor plate ( 12 ).

4. The device as claimed in claim 3 , characterized in that the upper end of said fluid deflection means ( 24 ) is also located below the upper end of said risers ( 13 ).

5. The device as claimed in claim 3 , characterized in that the upper end of said fluid deflection means ( 24 ) is located at the same level as the upper end of said risers ( 13 ).

6. The device as claimed in claim 1 , characterized in that said fluid deflection means ( 24 ) comprises at least one orifice ( 20 ) through which a liquid phase can pass in the direction of the distributor plate ( 12 ).

7. The device as claimed in claim 1 , characterized in that each upper lateral cross-section of flow ( 17 a ) of said exchange box ( 16 ) is associated with a fluid deflection means ( 24 ).

8. The device as claimed in claim 1 , characterized in that the total cumulative height H 2 of said mixing chamber ( 15 ) and of said exchange chamber ( 16 ) is in the range 200 to 1500 mm.

9. The device as claimed in claim 1 , characterized in that the width L of said exchange chamber ( 16 ) is in the range 200 to 1100 mm.

10. The device as claimed in claim 1 , characterized in that the volume ratio between said exchange chamber ( 16 ) and said mixing chamber ( 15 ) is in the range 5% to 60%.

11. The device as claimed in claim 1 , characterized in that said mixing chamber ( 15 ) and said exchange chamber ( 16 ) are in one piece.

12. The device as claimed in claim 1 , characterized in that said mixing chamber ( 15 ) comprises at least one diverting means on at least one or more internal wall(s) of said mixing chamber ( 15 ).

13. The device as claimed in claim 1 , characterized in that said exchange chamber ( 16 ) comprises a plurality of horizontal cross-sections of flow for fluids to pass from said exchange zone ( 16 ) to the distributor plate ( 12 ).

14. The device as claimed in claim 1 , characterized in that the exchange chamber ( 16 ) is located at a distance “d” from the distributor plate ( 12 ) which is in the range 20 to 150 mm.

15. A catalytic downflow reactor comprising a chamber ( 1 ) comprising at least two fixed beds of catalyst ( 2 , 14 ) separated by an intermediate zone comprising a fluid mixing and distribution device as claimed in claim 1 .

Assignees

• Ifp Energies Now

Inventors

• Augier Frederic
• Plais Cecile
• Beard Philippe
• Bonnardot Jerome
• Delteil Jauffray
• Packeu Paris
• Pupat Nicolas

Classifications

• B01J8/0496 Primary

  Heating or cooling the reactor · CPC title

• B01J2208/027

  Beds · CPC title

• B01J8/0492 Primary

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

• B01J2208/00938

  Flow distribution elements · CPC title

• B01J8/008 Primary

  Details of the reactor or of the particulate material; Processes to increase or to retard the rate of reaction (B01J8/0285, B01J8/067, B01J8/087, B01J8/1836 take precedence) · CPC title