Surge drum mixing system

Patent metadata

Field	Value
Publication number	US-9446364-B2
Application number	US-201213403304-A
Country	US
Kind code	B2
Filing date	Feb 23, 2012
Priority date	Feb 23, 2012
Publication date	Sep 20, 2016
Grant date	Sep 20, 2016

Abstract

Systems and methods for storing and handling slurries are provided. The surge drum system for storing a slurry can include a storage vessel having a first end, a second end, and at least one wall surrounding an internal volume between the first and second ends. The system can also include a slurry inlet and a slurry outlet, both in fluid communication with the internal volume. A recirculation inlet can be in fluid communication with the internal volume at the first end of the storage vessel. The system can also include a pump having a suction line in fluid communication with the outlet. A discharge line of the pump can be in fluid communication with an outlet valve and a recirculation valve that can be in fluid communication with the recirculation inlet.

First claim

What is claimed is:

1. A surge drum system for storing a slurry, comprising:
a storage vessel having a sloped first end, a second end, and at least one wall surrounding an internal volume between the first and second ends;
a slurry inlet in fluid communication with the internal volume and located proximate the second end of the storage vessel, the slurry inlet configured to direct the slurry entering the storage vessel toward the first end;
a recirculation inlet in fluid communication with the internal volume and located proximate the first end of the storage vessel, the recirculation inlet configured to direct the slurry toward the second end;
an outlet in fluid communication with the internal volume, the outlet located between the slurry inlet and the recirculation inlet and proximate an upper surface of the slurry in the internal volume;
a pump having a suction line in fluid communication with the outlet;
a recirculation valve in fluid communication with a discharge line of the pump and the recirculation inlet; and
an outlet valve in fluid communication with the discharge line of the pump.

2. The system of claim 1 , further comprising a deflector disposed within the internal volume and between the slurry inlet and the upper surface of the slurry in the internal volume, the deflector having a surface redirecting flow between the slurry inlet and the recirculation inlet.

3. The system of claim 1 , wherein the outlet valve is in fluid communication with a catalyst regenerator.

4. The system of claim 1 , wherein the slurry inlet is in fluid communication with a filtration system.

5. The system of claim 2 , wherein the recirculation inlet is configured to direct the slurry toward a first side of the deflector, wherein the slurry inlet is configured to direct the slurry toward a second side of the deflector, and wherein the slurry contacts the deflector before collecting in the storage vessel.

6. The system of claim 1 , wherein the first end is sloped to concentrate particles and wherein the recirculation inlet directs the fuel oil slurry into particles concentrated in the first end.

7. The system of claim 6 , further comprising an outlet valve in communication with the discharge line, the recirculation valve and the outlet valve cooperating to flow a portion of the fuel oil slurry from the pump to the recirculation inlet.

8. A method for storing a slurry, comprising:
introducing a slurry into a slurry inlet of a storage vessel, wherein:
the storage vessel has a sloped first end, a second end, and at least one wall surrounding an internal volume between the first and second ends, and
the slurry inlet is in fluid communication with the internal volume and located proximate the second end of the storage vessel, the slurry inlet being configured to direct the slurry entering the storage vessel toward the first end;

operating a pump to remove a portion of the slurry from the storage vessel through a suction line in fluid communication with an outlet that is in fluid communication with the internal volume, wherein the outlet is located between the slurry inlet and a recirculation inlet and proximate an upper surface of the slurry in the internal volume;
conveying a first portion of the removed slurry through a recirculation valve in fluid communication with a discharge line of the pump and the recirculation inlet;
introducing the first portion of the removed slurry into the recirculation inlet, the recirculation inlet being in fluid communication with the internal volume and located proximate the first end of the storage vessel, the recirculation inlet configured to direct the slurry toward the second end; and
introducing a second portion of the removed slurry to an outlet valve in fluid communication with the discharge line of the pump.

9. The method of claim 8 , wherein the storage vessel has a flow deflector that impedes direct flow between the slurry inlet and the recirculation inlet.

10. The method of claim 8 , further comprising:
introducing the second portion of the removed slurry into a catalyst regenerator; and
combusting the second portion of the removed slurry to generate heat that is used to regenerate a catalyst.

11. The method of claim 10 , further comprising:
introducing the generated catalyst into a riser containing a hydrocarbon; and
cracking the hydrocarbon in the presence of the regenerated catalyst to form an effluent product.

12. The method of claim 11 , further comprising:
introducing the effluent product into a quench tower containing a quench oil; and
contacting the effluent product with the quench oil to produce a cooled product gas.

13. The method of claim 12 , further comprising:
circulating the quench oil through a filtration system to produce a slurry; and
introducing the slurry to the slurry inlet.

14. A fluid catalytic cracking system comprising:
a fluid catalytic cracking riser operable to react a hydrocarbon with a catalyst to produce a product;
a quench tower in fluid communication with the fluid catalyst cracking riser and operable to mix the product with a quench oil;
a filtration system in fluid communication with the quench tower and operable to remove a fuel oil slurry from the quench oil;
a surge drum system in fluid communication with filtration system, wherein the surge drum system comprises:
a storage vessel having a first end, a second end, and at least one wall surrounding an internal volume and located proximate the second end of the storage vessel;
a slurry inlet in fluid communication with the internal volume and located proximate the second end of the storage vessel, the slurry inlet receiving the fuel oil slurry from the filtration system and directing the fuel oil slurry entering the storage vessel toward the first end;
a recirculation inlet in fluid communication with the internal volume and located proximate the first end of the storage vessel, the recirculation inlet configured to direct the fuel oil slurry toward the second end;
an outlet in fluid communication with the internal volume, the outlet located between the slurry inlet and the recirculation inlet;
a pump having a suction line in fluid communication with outlet;
a recirculation valve in fluid communication with a discharge line of the pump and the recirculation inlet;
an outlet valve in fluid communication with discharge line of the pump; and

a regenerator in fluid communication with the outlet valve and operable to supply catalyst to the fluid catalytic cracking riser,
wherein the surge drum system further comprises a deflector disposed within the internal volume so as to impede direct flow between the slurry inlet and the recirculation inlet, wherein the deflector is position above an upper surface of the slurry in the internal volume.

15. The system of claim 14 , further comprising:
a recirculation line conveying the fuel oil slurry from the recirculation valve to the recirculation inlet; and
an outlet valve in fluid communication with the discharge line, the recirculation valve and the outlet valve cooperating to flow a portion of the fuel oil slurry to the recirculation inlet.

16. The system of claim 14 , wherein the recirculation inlet is positioned at a low point of the storage vessel and is configured to direct the fuel oil slurry into concentrated particles in the storage vessel.

17. The system of claim 14 , wherein the slurry inlet directs the fuel oil slurry flow downward to the first end and the recirculation inlet directs the fuel oil slurry flow upward to the second end.

Assignees

• Mason Gary L
• Kellogg Brown & Root Llc

Inventors

• Mason Gary L

Classifications

• Y10T137/86348

  Tank with internally extending flow guide, pipe or conduit · CPC title

• B01J2208/00176

  outside the reactor · CPC title

• Y10T137/877

  With flow control means for branched passages · CPC title

• B01J8/18

  with fluidised particles {(combustion apparatus with fluidised bed in general F23C10/00; furnaces with fluidised bed F27B15/00)} · CPC title

• Y10T137/0335

  Controlled by consistency of mixture · CPC title