Decreasing maldistribution in separation towers

Patent metadata

Field	Value
Publication number	US-9919237-B2
Application number	US-201314426018-A
Country	US
Kind code	B2
Filing date	Sep 30, 2013
Priority date	Nov 5, 2012
Publication date	Mar 20, 2018
Grant date	Mar 20, 2018

Abstract

Systems and methods are provided for reducing maldistribution of liquids and vapors in packed towers. An exemplary separation system includes a separation tower including at least two packed beds, and a vapor redistribution plate disposed between two sequentially disposed packed beds, wherein the vapor redistribution plate is configured to mix a vapor from a lower packed bed before introducing the vapor into an upper packed bed.

First claim

What is claimed is:

1. A separation system, comprising:
a separation tower comprising at least two packed beds;
a vapor redistribution plate disposed between two sequentially disposed packed beds, wherein the vapor redistribution plate is configured to mix a vapor from a lower packed bed before introducing the vapor into an upper packed bed; and
a divider plate within a packed bed, wherein the divider plate is disposed along the axis of the packed bed, wherein the divider plate is positioned to prevent liquid flow from one area of the packed bed to another area of the packed bed, and wherein the divider plate comprises a panel with a surface feature configured to inhibit liquid from flowing along the panel, and further wherein the surface feature comprises a tab that projects from the panel.

2. The separation system of claim 1 , wherein the vapor redistribution plate comprises a baffle that blocks an outer annulus of the separation tower.

3. The separation system of claim 1 , wherein the vapor redistribution plate comprises a baffle with an upwards slope to a center opening.

4. The separation system of claim 1 , wherein the vapor redistribution plate comprises a static mixer configured to blend the vapor stream.

5. The separation system of claim 1 , wherein the vapor redistribution plate comprises a pipe distributor comprising multiple orifices configured to evenly feed vapor to the upper packed bed.

6. The separation system of claim 1 , wherein the vapor redistribution plate is sealed to a downcomer, wherein the downcomer is configured direct a liquid flow into the lower packed bed while blocking a vapor flow from the lower packed bed.

7. The separation system of claim 1 , wherein the divider plate comprises panels placed in the packed bed, wherein the panels are placed along a longitudinal axis to prevent maldistributions caused by tilting along a perpendicular axis.

8. The separation system of claim 7 , wherein the longitudinal axis is aligned along a forward and aft axis on a vessel.

9. The separation system of claim 1 , wherein the divider plate comprises a plurality of panels positioned to divide the packed bed into a series of substantially symmetric compartments.

10. The separation system of claim 9 , wherein the substantially symmetric compartments are hexagonally shaped.

11. The separation system of claim 1 , wherein the divider plate comprises a plurality of panels positioned to divide the packed bed into asymmetric compartments.

12. The separation system of claim 1 , wherein the divider plate comprises a plurality of panels configured to inhibit liquid flow from one region of the packed bed to another region of the packed bed, wherein the plurality of panels are not in contact with each other.

13. The separation system of claim 12 , wherein the divider plate comprises a plurality of panels disposed perpendicular to a motion vector to prevent maldistributions caused by tilting along the motion vector.

14. A separation system, comprising:
a separation tower comprising at least two packed beds;
a vapor redistribution plate disposed between two sequentially disposed packed beds, wherein the vapor redistribution plate is configured to mix a vapor from a lower packed bed before introducing the vapor into an upper packed bed; and
a divider plate within a packed bed, wherein the divider plate is disposed along the axis of the packed bed, wherein the divider plate is positioned to prevent liquid flow from one area of the packed bed to another area of the packed bed, and wherein the divider plate comprises a panel with a surface feature configured to inhibit liquid from flowing along the panel, wherein the surface feature comprises an undulation.

15. The separation system of claim 1 , comprising a liquid distributor configured to evenly distribute liquid over a packed bed, wherein the liquid distributor comprises closed channels with a plurality of metering orifices.

16. The separation system of claim 15 , wherein the liquid distributor comprises a mixing chamber configured to hold a high liquid head.

17. A sea going vessel comprising:
a separation tower comprising at least two packed beds;
a vapor redistribution plate disposed between two sequentially disposed packed beds, wherein the vapor redistribution plate is configured to mix a vapor from a lower packed bed before introducing the vapor into an upper packed bed; and
a divider plate within a packed bed, wherein the divider plate is disposed along the axis of the packed bed, and wherein the divider plate is configured to prevent liquid flow from one area of the packed bed to another area of the packed bed, and wherein the divider plate comprises a panel with a surface feature configured to inhibit liquid from flowing along the panel, wherein the surface feature comprises an undulation.

18. The sea going vessel of claim 17 , comprising storage facilities for hydrocarbons.

19. A sea going vessel comprising:
a separation tower comprising at least two packed beds;
a vapor redistribution plate disposed between two sequentially disposed packed beds, wherein the vapor redistribution plate is configured to mix a vapor from a lower packed bed before introducing the vapor into an upper packed bed; and
a divider plate within a packed bed, wherein the divider plate is disposed along the axis of the packed bed, and wherein the divider plate is configured to prevent liquid flow from one area of the packed bed to another area of the packed bed, and wherein the divider plate comprises a panel with a surface feature configured to inhibit liquid from flowing along the panel, wherein the surface feature comprises a tab that projects from the panel.

Assignees

• Moorkanikkara Srinivas N
• Grave Edward J
• Cullinane John T
• Exxonmobil Upstream Res Co

Inventors

• Moorkanikkara Srinivas N
• Grave Edward J
• Cullinane John T

Classifications

• B01D3/008 Primary

  Liquid distribution · CPC title

• B01D53/185

  Liquid distributors · CPC title

• B01J19/32

  Packing elements in the form of grids or built-up elements for forming a unit or module inside the apparatus for mass or heat transfer · CPC title

• B01D2256/24

  Hydrocarbons · CPC title

• B01J2219/33

  Details relating to the packing elements in general · CPC title