Apparatus and system for swing adsorption processes

Patent metadata

Field	Value
Publication number	US-11033852-B2
Application number	US-201916545647-A
Country	US
Kind code	B2
Filing date	Aug 20, 2019
Priority date	May 31, 2016
Publication date	Jun 15, 2021
Grant date	Jun 15, 2021

Abstract

Provided are apparatus and systems for performing a swing adsorption process. This swing adsorption process may involve performing a startup mode process prior to beginning a normal operation mode process to remove contaminants from a gaseous feed stream. The startup mode process may be utilized for swing adsorption processes, such as TSA and/or PSA, which are utilized to remove one or more contaminants from a gaseous feed stream.

First claim

What is claimed is:

1. A cyclical swing adsorption system comprising:
a plurality of manifolds, wherein the plurality of manifolds comprise a feed manifold configured to pass a feed stream to a plurality of adsorbent bed units during an adsorption step, a product manifold configured to pass a product stream from the plurality of adsorbent bed units during the adsorption step, a purge manifold configured to pass a purge stream to the plurality of adsorbent bed units during a regeneration step, a purge product manifold configured to pass a purge product stream from the plurality of adsorbent bed units during the regeneration step, each manifold of the plurality of manifolds is associated with one swing adsorption process step of a plurality of swing adsorption process steps;
said plurality of adsorbent bed units coupled to the plurality of manifolds, each of the adsorbent bed units comprising:
a housing;
an adsorbent material disposed within the housing;
a plurality of valves, wherein at least one of the plurality of valves is associated with one of the plurality of manifolds and is configured to manage fluid flow along a flow path extending between the respective manifold and the adsorbent material;

a startup mode bypass valve in fluid communication with purge manifold and the product manifold and configured to provide a flow passage between the product manifold and the purge manifold in a startup mode position and configured to block the flow passage between the product manifold and the purge manifold in a normal operation mode position.

2. The cyclical swing adsorption system of claim 1 , wherein the plurality of valves comprise one or more poppet valves.

3. The cyclical swing adsorption system of claim 1 , wherein the plurality of adsorbent bed units are configured to operate at pressures between 0.1 bar absolute (bara) and 100 bara.

4. The cyclical swing adsorption system of claim 1 , further comprising a heating unit disposed upstream of the purge manifold and downstream of the product manifold, wherein the heating unit is configured to heat the product stream to a temperature in the range between 450° F. and the gaseous feed stream temperature.

5. The cyclical swing adsorption system of claim 4 , further comprising a separating unit disposed upstream of the purge manifold and downstream of the heating unit, wherein the separating unit is configured to lessen the pressure of the product stream by at least 10% as compared to the pressure of the product stream upstream of the separating unit.

6. The cyclical swing adsorption system of claim 1 , further comprising a heating unit configured to heat the purge product stream to a temperature 10° F. greater than the dew point of the purge product stream.

7. The cyclical swing adsorption system of claim 1 , further comprising a conditioning unit disposed downstream of the purge product manifold and upstream of the feed manifold, wherein the conditioning unit is configured to remove one or more contaminants from the purge product stream.

8. The cyclical swing adsorption system of claim 1 , wherein the plurality of manifolds further comprise a blowdown manifold configured to pass a blowdown stream from the plurality of adsorbent bed units during a blowdown step.

9. The cyclical swing adsorption system of claim 1 , further comprising a liquefied natural gas process unit in fluid communication with the adsorbent bed unit and configured to receive the product stream and separate the product stream into a final product stream and a flash fuel stream, wherein the flash fuel stream is passed to the purge manifold.

10. The cyclical swing adsorption system of claim 1 , further comprising a cryogenic natural gas liquid recovery (NGL) process unit in fluid communication with the adsorbent bed unit and configured to receive the product stream and separate the product stream into a final product stream and a residue gas stream, wherein the residue gas stream is passed to the purge manifold.

11. The cyclical swing adsorption system of claim 10 , configured to adjust the amount of the residue gas stream to the purge manifold.

12. The cyclical swing adsorption system of claim 1 , further comprising a cryogenic natural gas liquid recovery (NGL) process unit in fluid communication with the adsorbent bed unit wherein the natural gas liquid recovery (NGL) process unit comprises a demethanizer and a residue gas compressor, and is configured for the residue gas compressor to recycle a demethanizer column overhead product stream to a mix with a feed stream in the feed manifold.

13. The cyclical swing adsorption system of claim 1 , configured to pass the purge product stream to a suction of a residue gas compressor and combine the purge product stream with the feed stream either upstream or downstream of a triethylene glycol (TEG) based dehydration unit before passing the feed stream to the feed manifold.

14. The cyclical swing adsorption system of claim 1 , configured to heat the plurality of adsorbent bed units to obtain a temperature differential between the feed ends of the plurality of adsorbent beds and the product ends of the plurality of adsorbent beds.

15. The cyclical swing adsorption system of claim 1 , configured to operate on a cycle duration of greater than 2 seconds and less than 800 seconds.

Assignees

• Exxonmobil Upstream Res Co

Inventors

• Nagavarapu Ananda Krishna
• Barnes William
• Marshall Bennett D
• Kelley Bruce T
• Johnson Robert A

Classifications

• B01D53/047 Primary

  Pressure swing adsorption · CPC title

• Y02C20/40

  of CO2 · CPC title

• B01D2257/504

  Carbon dioxide · CPC title

• B01D2259/4062

  using six beds · CPC title

• B01D2256/24

  Hydrocarbons · CPC title