Modifying flow of a reactor inlet distributor

Patent metadata

Field	Value
Publication number	US-9636654-B2
Application number	US-201313779935-A
Country	US
Kind code	B2
Filing date	Feb 28, 2013
Priority date	Feb 28, 2012
Publication date	May 2, 2017
Grant date	May 2, 2017

Abstract

An apparatus comprising a reactor inlet distributor and a perforated deflector. In this apparatus the relationship between the diameter of the perforated deflector (D D ), the height of the opening of the inlet distributor pipe of the reactor inlet distributor (H SLOT ) and the outer diameter of the inlet distributor pipe (OD DP ) is:

D D =OD DP +2( xH SLOT )
wherein x is at least ½.

First claim

The invention claimed is:

1. A reactor inlet for delivering vapor into a radial inflow catalytic reactor wherein the catalytic reactor is the type that has an outer wall shell defining a large reaction space within the outer wall shell, a center-pipe, a catalyst bed within the reaction space around the center-pipe, a head space above the catalyst bed and center-pipe and a series of scallops along the inside of the outer wall shell of the catalytic reactor and also around the outside of the catalyst bed to direct vapor from the inlet into the head space and then to the scallops, through the catalyst bed and then to the center-pipe which is connected to an
outlet of the catalytic reactor, wherein the reactor inlet comprises:
a) a generally cylindrical distributor pipe having a peripheral wall, a first end or top end through which feed vapor is received and an opposite end or bottom end that is arranged to extend into the head space of a reactor, wherein the feed vapor is arranged to exit through openings extending radially outwardly through the peripheral wall of the distributor pipe adjacent to the opposite end or bottom end of the distributor pipe and out into the headspace and further wherein the peripheral wall of the distributor pipe has an outer diameter;
b) a deflector plate attached to the opposite end or bottom end of the distributor pipe wherein the deflector plate has a diameter that is larger than the outer diameter of the peripheral wall of the generally cylindrical distributor pipe such that the deflector plate is arranged to be positioned within the head space of the reactor, and further wherein the deflector plate has an outer edge and a generally circular bottom with a continuous periphery of the circular bottom wherein the circular bottom extends across the opposite end or bottom end of the generally cylindrical distributor pipe at least to the peripheral wall of the generally cylindrical distributor pipe so as to also define a terminal end of the generally cylindrical distributor pipe and the reactor inlet wherein the deflector plate further includes a sloped wall extending from the continuous periphery of the circular bottom in an outwardly direction from the peripheral wall of the generally cylindrical distributor pipe and angled back towards the first end or top end of the generally cylindrical distributor pipe at the opposite end or bottom end to deflect feed vapor that has passed through the openings in the peripheral wall of the generally cylindrical distributor pipe and radially away from the openings in a direction that is angled somewhat back towards the first end of the distributor pipe so as to follow the outer wall shell of the catalytic reactor to the scallops and then into the catalyst bed; and
c) holes in the sloped wall of the deflector plate to allow some of the feed vapor to pass through the deflector;
wherein there is a relationship between the diameter of the perforated deflector (D O ) and the height of the openings of distributor pipe of the reactor inlet distributor (H SLOT ) and the outer diameter of the distributor pipe (OD DP ):
D O =OD DP +2( xH SLOT )

wherein x is at least ½.

2. The reactor inlet according to claim 1 where the sloped wall has the shape of a truncated cone.

3. The reactor inlet according to claim 2 where the bottom of the deflector is flat in shape.

4. The reactor inlet according to claim 3 where the sloped wall is sloped outwardly at an angle of less than forty five degrees from the plane of the flat bottom.

5. The reactor inlet according to claim 1 where feed vapor is arranged to flow out of the distributor pipe through the openings adjacent the opposite end and then a portion of the feed vapor is arranged to pass over the outer edge while another portion of the feed vapor is arranged to flow through holes in the deflector.

Assignees

• Phillips 66 Co

Inventors

• Oshinowo Olanrewaju M
• Palmer Brad P

Classifications

• B01J2208/00938

  Flow distribution elements · CPC title

• B01J8/0214 Primary

  in a cylindrical annular shaped bed · CPC title

• B01J2208/00929

  Provided with baffles · CPC title

• B01J19/0053 Primary

  Details of the reactor · CPC title

• B01J2208/0092

  Perforated plates · CPC title