Scale collection device for downflow reactors

Patent metadata

Field	Value
Publication number	US-10537866-B2
Application number	US-201816221071-A
Country	US
Kind code	B2
Filing date	Dec 14, 2018
Priority date	Dec 21, 2017
Publication date	Jan 21, 2020
Grant date	Jan 21, 2020

Abstract

The invention involves a scale collection device that is located within downflow reactor head for removing solids from feed streams to increase reactor operating cycle time without impact on effective reactor space for catalyst loading. More particularly, a filtering zone is located in an upper portion of a reactor vessel above a rough liquid distribution tray and a distribution tray.

First claim

The invention claimed is:

1. A reactor comprising an upper portion and a lower portion wherein the upper portion comprises:
a rough liquid distribution tray comprising a cylindrical wall spaced apart from a reactor wall and a perforated bottom plate;
a scale collection device within the rough liquid distribution tray, the scale collection device comprising a plurality of media support/spacers, the plurality of media support/spacers located on the bottom plate of the rough liquid distribution tray, and the media support/spacers and the cylindrical wall of the rough liquid distribution tray defining a filtering zone; and
a vapor-liquid distribution tray located below the rough liquid distribution tray and wherein the vapor-liquid distribution tray comprises a plurality of distributors.

2. The reactor of claim 1 , wherein the filtering zone comprises a first portion in an upper region comprising porous pellets having larger pores than a second portion in a lower region of the filtering zone.

3. The reactor of claim 1 , wherein the filtering zone comprises porous ceramic pellets.

4. The reactor of claim 1 , wherein the plurality of media support/spacers are coupled to the rough liquid distribution tray.

5. The reactor of claim 1 , wherein the plurality of media support/spacers comprise profile wire.

6. The reactor of claim 1 , wherein the plurality of media support/spacers comprise grating.

7. The reactor of claim 1 , wherein the plurality of media support/spacers comprise grating and wire mesh.

8. The reactor of claim 1 , wherein the plurality of media support/spacers comprises a perforated plate.

9. The reactor of claim 1 , further comprising a plurality of overflow chimneys, wherein the overflow chimneys contain slots, wherein the slots may be v-shaped.

10. The reactor of claim 1 , further comprising a plurality of overflow chimneys, wherein the overflow chimneys contain cuts.

11. The reactor of claim 1 , further comprising a plurality of overflow chimneys, wherein the overflow chimneys contain holes.

12. The reactor of claim 1 , further comprising a plurality of overflow chimneys, wherein the overflow chimneys may comprise bubble caps.

13. The reactor of claim 1 , wherein the perforated bottom plate of the rough liquid distribution tray contains holes sized to generate the desired liquid level on the rough liquid distribution tray.

14. An apparatus comprising an upper portion and a lower portion wherein the upper portion comprises:
a rough liquid distribution tray comprising a cylindrical wall spaced apart from a reactor wall and a perforated bottom plate;
a scale collection device within the rough liquid distribution tray, the scale collection device comprising a plurality of media support/spacers, the plurality of media support/spacers located on the bottom plate of the rough liquid distribution tray, and the media support/spacers and the cylindrical wall of the rough liquid distribution tray defining a filtering zone;
a plurality of overflow chimneys attached to the media support/spacers and extending upward through the filtering zone; and
a vapor-liquid distribution tray located below the rough liquid distribution tray and wherein the vapor-liquid distribution tray comprises a plurality of distributors.

15. The apparatus of claim 14 , wherein the filtering zone comprises a first portion in an upper region comprising porous pellets having larger pores than a second portion in a lower region of the filtering zone.

16. The apparatus of claim 14 , wherein the filtering zone comprises porous ceramic pellets.

17. The apparatus of claim 14 , wherein the perforated bottom plate of the rough liquid distribution tray contains holes sized to generate the desired liquid level on the rough liquid distribution tray.

Assignees

• Uop Llc

Inventors

• Bunting Jr Robert L
• Lesniak Steven J
• Xu Zhanping

Classifications

• B01J2204/002

  the feeding side being of particular interest · CPC title

• B01J8/009

  Membranes, e.g. feeding or removing reactants or products to or from the catalyst bed through a membrane · CPC title

• B01J2208/00938

  Flow distribution elements · CPC title

• B01D24/22

  Downward filtration, the filter material being supported by pervious surfaces · CPC title

• B01D36/001

  Filters in combination with devices for the removal of gas, air purge systems · CPC title