System and process for injecting catalyst and/or additives into a fluidized catalytic cracking unit

• US 8,012,422 B2
• Filed: 03/23/2005
• Issued: 09/06/2011
• Est. Priority Date: 03/23/2004
• Status: Active Grant

• Current Assignee: W R Grace & Company - CONN (Standard Industries Holdings, Inc.)
• Original Assignee: W R Grace & Company - CONN (Standard Industries Holdings, Inc.)
• Inventors: Jordan, Alfred Ferdinand, Yaluris, George, Albin, Lenny Lee
• Primary Examiner(s): Leung; Jennifer A
• Application Number:
  US10/593,499
• Publication Number:
  US 20070189935A1
• Time in Patent Office: 2,358 Days
• Field of Search: 422/139, 422/144, 422/145, 422/219, 406/122, 406/124, 406/126, 406/145, 406/146
• US Class Current: 422/145
• CPC Class Codes: B01J 2208/00548 Flow
• CPC Class Codes: B01J 2208/00752 Feeding
• CPC Class Codes: B01J 2208/00761 Discharging
• CPC Class Codes: B01J 2208/00769 Details of feeding or discharging
• CPC Class Codes: B01J 8/0015 Feeding of the particles in the reactor; Evacuation of the particles out of the reactor
• CPC Class Codes: B01J 8/0025 by an ascending fluid
• CPC Class Codes: B01J 8/003 in a downward flow
• CPC Class Codes: B01J 8/0035 Periodical feeding or evacuation
• CPC Class Codes: B01J 8/004 by means of a nozzle
• CPC Class Codes: B01J 8/006 by filtration
• CPC Class Codes: B01J 8/06 in tube reactors; the solid particles being arranged in tubes
• CPC Class Codes: B01J 8/18 with fluidised particles combustion apparatus with fluidised bed in general F23C10/00; furnaces with fluidised bed F27B15/00
• CPC Class Codes: B01J 8/24 according to "fluidised-bed" technique B01J8/20 takes precedence
• CPC Class Codes: C10G 11/18 according to the "fluidised-bed" technique
• CPC Class Codes: C10G 2300/80 Additives

Abstract

A preferred embodiment of a system for loading catalyst and/or additives into a fluidized catalytic cracking unit includes a bin for storing at least one of the catalyst and/or additives, and a loading unit in fluid communication with the storage bin and the fluidized catalytic cracking unit on a selective basis. The loading unit is capable of being evacuated so that a resulting vacuum within the loading unit draws the catalyst and/or additive from the bin. The loading unit is also capable of being pressurized so that the catalyst and/or additive is transferred from the loading unit to the fluidized catalytic cracking unit.

Claims

1. A system for injecting catalyst and/or additives into a fluidized catalytic cracking unit, comprising:

a dust collector adapted to be in fluid communication with at least one storage bin holding one of the catalyst and/or additives;

a vacuum producer in fluid communication with the dust collector so that the vacuum producer generates a vacuum within the dust collector that draws the one of the catalyst and/or additives into the dust collector; and

a transfer pot in fluid communication with the dust collector for receiving the one of the catalyst and/or additives from the dust collector, the transfer pot adapted to be in fluid communication with the fluidized catalytic cracking unit and with a source of pressurized air so that the one of the catalyst and/or additives can be transferred to the fluidized catalytic cracking unit in response to a pressure differential between the transfer pot and the fluidized catalytic cracking unit;

a plurality of load cells for measuring a weight of the dust collector, the transfer pot, and the one of the catalyst and/or additives drawn into the dust collector;

where the vacuum producer is adapted to be in fluid communication with the source of pressurized air, the system further comprising;

a first valve for isolating the vacuum producer from the source of pressurized air on a selective basis;

a second valve for isolating the transfer pot from the source of pressurized air on a selective basis;

a third valve for isolating the transfer pot from the fluidized catalytic cracking unit on a selective basis;

a fourth valve for isolating the dust collector from the storage bin on a selective basis; and

a controller electrically coupled to the load cells and respective actuators of the first, second, third, and fourth valves for controlling the operation of the first, second, third, and fourth valves.

2. The system of claim 1, further comprising a first storage bin holding catalyst and/or additive and a hose coupled to the dust collector and the first storage bin so that the dust collector and the first storage bin are in fluid communication by way of the hose.

3. The system of claim 1, wherein the dust collector comprises a filter in fluid communication with the vacuum producer so that the filter collects dust from within the dust collector.

4. The system of claim 1, further comprising a volume chamber and moisture trap for drying air supplied by the source of pressurized air.

5. The system of claim 1, further comprising a cabinet for housing the dust collector and the transfer pot, wherein the dust collector and the transfer pot are mounted on a plurality of legs, each of the legs is secured to a common plate, the plate is mounted on the load cells, and the load cells are mounted on a base of the cabinet.

6. The system of claim 1, wherein:

the dust collector comprises a substantially cylindrical upper portion and an adjoining, substantially conical lower portion; and

the transfer pot comprises a substantially cylindrical upper portion adjoining the lower portion of the dust collector, and substantially conical lower portion adjoining the upper portion of the transfer pot.

7. The system of claim 6, wherein the lower portion of the dust collector has an opening formed therein for permitting the one of the catalyst and/or additives to flow from the dust collector to the transfer pot.

8. The system of claim 7, further comprising a valve for covering the opening on a selective basis, the valve having a plug movable between an upper and a lower position in response to impingement of the pressurized air thereon.

9. The system of claim 6, wherein the lower portion of the transfer pot has an opening formed therein for permitting the one of the catalyst and/or additives to flow from the transfer pot to the fluidized catalytic cracking unit.

10. The system of claim 1, wherein the controller is capable of:

generating a first control input to cause the first valve to open;

generating a second and a third control input that cause the respective first and the fourth valves to close after a predetermined amount of the one of the catalyst and/or additives has been drawn into the dust collector;

generating a fourth control input that causes the second valve to open to pressurize the transfer pot;

generating a fifth control input that causes the second valve to close after a pressure differential between the transfer pot and a regenerator of the fluidized catalytic cracking unit reaches a predetermined value; and

generating a fifth control input that causes the third valve to open.

11. The system of claim 2, further comprising:

a second storage bin coupled to the dust collector and the second storage bin so that the dust collector and the second storage bin are in fluid communication by way of a second hose; and

a manifold coupled in fluid communication with the dust collector and the hoses for the first and second storage bins for placing the hoses in fluid communication with the dust collector on a selective basis.

12. The system of claim 1, wherein the dust collector and the transfer pot each comprise a respective sidewall.

13. The system of claim 1, wherein the at least one storage bin and the dust collector are non-adjoining.

14. The system of claim 1, wherein the dust collector adjoins the transfer pot.

38. The system of claim 5, wherein the cabinet is adapted to function as a shipping container for the system.

15. A system for loading catalyst and/or additives into a fluidized catalytic cracking unit, comprising:

a first bin for storing a first of the catalyst and/or additives;

a second bin for storing a second of the catalyst and/or additives;

a loading unit adapted to be in fluid communication with the first and second bins and the fluidized catalytic cracking unit;

a first valve for isolating the first bin from the loading unit on a selective basis;

a second valve for isolating the second bin from the loading unit on a selective basis; and

a third valve for isolating the loading unit from the fluidized catalytic cracking unit on a selective basis;

the system further comprising a first pipe guide in fluid communication with the first bin, and a second pipe guide in fluid communication with the second bin, wherein a first end of the first pipe guide and a first end of the second pipe guide are each secured to a sidewall of the loading unit, and wherein a second end of the first pipe guide is secured to a second end of the second pipe guide.

16. The system of claim 15, further comprising a manifold comprising the first and second valves.

17. The system of claim 15, wherein the loading unit is capable of maintaining a vacuum therein so that the first and second of the catalyst and/or additives can be drawn into the loading unit from the respective first and second bins by the vacuum, and the loading unit is capable of being pressurized so that the first and second of the catalyst and/or additives can be injected into the fluidized catalytic cracking unit in response to pressurization of the loading unit.

18. The system of claim 15, further comprising first and second hoses for coupling the respective first and second bins to the loading unit.

19. The system of claim 17, wherein the loading unit comprises a dust collector and a transfer pot.

20. The system of claim 19, wherein the dust collector is capable of maintaining a vacuum therein so that the first and second of the catalyst and/or additives can be drawn into the dust collector from the respective first and second bins by the vacuum, and the transfer pot is capable of being pressurized so that the first and second of the catalyst and/or additives can be injected into the fluidized catalytic cracking unit in response to pressurization of the transfer pot.

21. The system of claim 17, further comprising a vacuum producer for generating the vacuum within the loading unit.

22. The system of claim 19, wherein the dust collector comprises a filter for collecting dust generated by transfer of the at least one of the catalyst and/or additives from the respective first and second bins and into the loading unit.

23. The system of claim 17, further comprising a volume chamber and moisture trap for drying air used to pressurize the loading unit.

24. The system of claim 15, further comprising a controller, the controller being electrically coupled to respective actuators of the first, second, and third valves so that the controller can open and close the first, second, and third valves.

25. The system of claim 19, wherein:

the dust collector comprises a substantially cylindrical upper portion and an adjoining, substantially conical lower portion; and

the transfer pot comprises a substantially cylindrical upper portion adjoining the lower portion of the dust collector, and substantially conical lower portion adjoining the upper portion of the transfer pot.

26. The system of claim 19, wherein the transfer pot and the dust collector each comprise a respective sidewall.

27. The system of claim 15, wherein the first bin and the loading unit are non-adjoining, and the second bin and the loading unit are non-adjoining.

28. The system of claim 19, wherein the dust collector adjoins the transfer pot.

45. The system of claim 15, wherein the second end of the first pipe guide is secured to the second end of the second pipe guide within the loading unit, and the first and second pipe guides discharge the catalyst and/or additive at a location proximate a centerline of the loading unit.

46. The system of claim 15, further comprising a third pipe guide in fluid communication with a third storage bin, and a fourth pipe guide in fluid communication with a fourth storage bin, wherein a first end of the third pipe guide and a first end of the fourth pipe guide are each secured to the sidewall of the loading unit, a second end of the third pipe guide is secured to the second end of the second pipe guide, and a second end of the fourth pipe guide is secured to the second end of the third pipe guide.

47. The system of claim 15, further comprising a manifold, the manifold being secured to a second end of the first pipe guide and the second end of the second pipe guide so that the manifold is located within the loading unit.

48. The system of claim 47, wherein the manifold further comprises a discharge pipe guide for discharging the catalyst and/or additives from the manifold and into an interior volume of the dust collector at a location proximate a centerline of the dust collector.

29. A system for injecting catalyst and/or additives into a fluidized catalytic cracking unit, comprising:

a dust collector adapted to be in fluid communication with at least one storage bin holding one of the catalyst and/or additives;

a vacuum producer in fluid communication with the dust collector so that the vacuum producer generates a vacuum within the dust collector that draws the one of the catalyst and/or additives into the dust collector; and

a transfer pot in fluid communication with the dust collector for receiving the catalyst and/or additives from the dust collector, the transfer pot adapted to be in fluid communication with the fluidized catalytic cracking unit and with a source of pressurized air so that the one of the catalyst and/or additives can be transferred to the fluidized catalytic cracking unit in response to a pressure differential between the transfer pot and the fluidized catalytic cracking unit

a first pipe guide adapted to be in fluid communication with a first storage bin, and a second pipe guide adapted to be in fluid communication with a second storage bin, wherein a first end of the first pipe guide and a first end of the second pipe guide are each secured to a sidewall of the dust collector, wherein a second end of the first pipe guide is secured to a second end of the second pipe guide.

30. The system of claim 29, wherein the second end of the first pipe guide is secured to the second end of the second pipe guide within the dust collector, and the first and second pipe guides discharge the catalyst and/or additive at a location proximate a centerline of the dust collector.

31. The system of claim 29, further comprising a third pipe guide adapted to be in fluid communication with a third storage bin, and a fourth pipe guide adapted to be in fluid communication with a fourth storage bin, wherein a first end of the third pipe guide and a first end of the fourth pipe guide are each secured to the sidewall of the dust collector, a second end of the third pipe guide is secured to the second end of the second pipe guide, and a second end of the fourth pipe guide is secured to the second end of the third pipe guide.

32. The system of claim 29, further comprising a first valve mounted on the first pipe guide for placing the dust collector in fluid communication with the first storage bin on a selective basis, and a second valve mounted on the second pipe guide for placing the dust collector in fluid communication with the second storage bin on a selective basis.

33. The system of claim 29, further comprising a manifold, the manifold being secured to the second end of the first pipe guide and the second end of the second pipe guide so that the manifold is located within the dust collector.

34. The system of claim 33, wherein the manifold comprises a first valve in fluid communication with the first storage bin for placing the dust collector in fluid communication with the first storage bin on a selective basis, and a second valve in fluid communication with the second storage bin for placing the dust collector in fluid communication with the second storage bin on a selective basis.

35. The system of claim 33, wherein the manifold further comprises a discharge pipe guide for discharging the catalyst and/or additives from the manifold and into an interior volume of the dust collector.

36. The system of claim 35, further comprising a third pipe guide in fluid communication with a third storage bin, and a fourth pipe guide in fluid communication with a fourth storage bin, wherein a first end of the third pipe guide and a first end of the fourth pipe guide are each secured to the sidewall of the dust collector so that the third and fourth pipe guides extend into the dust collector, and the manifold is further secured to a second end of the third pipe guide and a second end of the fourth pipe guide.

37. The system of claim 35, wherein the discharge pipe guide discharges the catalyst and/or additives at a location proximate a centerline of the dust collector.

39. A system for storing and loading catalyst and/or additives into a fluidized catalytic cracking unit, comprising (1) at least two storage bins for storing catalyst and/or additive, (2) a loading unit positioned in a location remote from the location of the at least two storage bins, the loading unit adapted to be in fluid communication with the at least two storage bins and the fluidized catalytic cracking unit on a selective basis, wherein the loading unit is capable of being evacuated so that a resulting vacuum within the loading unit draws the catalyst and/or additives from the at least two storage bins, and the loading unit is capable of being pressurized so that the catalyst and/or additives can be transferred from the loading unit to the fluidized catalytic cracking unit, the system further comprising a first pipe guide in fluid communication with a first storage bin, and a second pipe guide in fluid communication with a second storage bin, wherein a first end of the first pipe guide and a first end of the second pipe guide are each secured to a sidewall of the loading unit, wherein a second end of the first pipe guide is secured to a second end of the second pipe guide.

40. The system of claim 39, wherein the second end of the first pipe guide is secured to the second end of the second pipe guide within the loading unit, and the first and second pipe guides discharge the catalyst and/or additive at a location proximate a centerline of the loading unit.

41. The system of claim 39, further comprising a third pipe guide adapted to be in fluid communication with a third storage bin, and a fourth pipe guide adapted to be in fluid communication with a fourth storage bin, wherein a first end of the third pipe guide and a first end of the fourth pipe guide are each secured to the sidewall of the loading unit, a second end of the third pipe guide is secured to the second end of the second pipe guide, and a second end of the fourth pipe guide is secured to the second end of the third pipe guide.

42. The system of claim 39, further comprising a manifold, the manifold being secured to a second end of the first pipe guide and the second end of the second pipe guide so that the manifold is located within the loading unit.

43. The system of claim 42, wherein the manifold comprises a first valve in fluid communication with the first storage bin for placing the dust collector in fluid communication with the first storage bin on a selective basis, and a second valve in fluid communication with the second storage bin for placing the dust collector in fluid communication with the second storage bin on a selective basis.

44. The system of claim 42, wherein the manifold further comprises a discharge pipe guide for discharging the catalyst and/or additives from the manifold and into an interior volume of the dust collector at a location proximate a centerline of the dust collector.