Centrifuge and cascade for the separation of gases

• US 6,716,269 B1
• Filed: 03/05/2002
• Issued: 04/06/2004
• Est. Priority Date: 03/05/2002
• Status: Expired due to Fees

• Current Assignee: Energent Incorporated (Rodan Energy Solutions Inc.)
• Original Assignee: Energent Incorporated (Rodan Energy Solutions Inc.)
• Inventors: Graff, Emilio Castano, Hays, Lance G.
• Primary Examiner(s): Hopkins, Robert A.
• Application Number:
  US10/087,917
• Time in Patent Office: 763 Days
• Field of Search: 554/08, 554/09, 553/43, 553/45, 554/18, 554/06, 553/94, 554/04, 963/14, 963/16, 95/34, 95/35, 952/58, 952/70, 952/54
• US Class Current: 95/35
• CPC Class Codes: B01D 53/24 by centrifugal force centrifuges B04B; cyclones B04C
• CPC Class Codes: B04B 5/08 Centrifuges for separating predominantly gaseous mixtures
• CPC Class Codes: B04B 9/06 Fluid drive

Abstract

A gas centrifuge operating to separate gases of differing chemical composition and molecular weight by a centrifugal force field. Such a centrifuge is operable to separate methane and carbon dioxide, and to produce torque, and a cascade of such centrifuges is operable to concentrate produced streams of carbon dioxide and methane, and to produce torque. A compact centrifugal gas processing system incorporating the gas centrifuge with other centrifugal components, is also provided.

Claims

1. A centrifuge means operating to separate gases of differing chemical composition and molecular weight by a centrifugal force field, there being vanes associated with said centrifuge means to receive and pass said gases, with turbine effect.

2. A multiplicity of centrifuge means as defined in claim 1, arranged such that the separated gases are further concentrated by introducing them into successive of said gas centrifuge means.

3. A gas processing system including a centrifuge means operating to separate carbon dioxide from methane by a centrifugal force field, and vanes associated with said centrifuge means to receive and pass the carbon dioxide and methane mixture with turbine effect.

4. A multiplicity of centrifuge means as defined in claim 3 configured such that the separated streams of carbon dioxide and methane are further concentrated by introducing them into successive of said gas centrifuge means.

5. A gas centrifuge comprising, in combination:

a) a hollow shaft to pass and introduce a gas mixture into a rotating cylinder,

b) said cylinder having axial vanes to cause the gas mixture to rotate with the same angular speed of the cylinder,

c) a radial passage connected to the periphery of the cylinder to receive and pressurize a produced and concentrated heavier gas stream,

d) a nozzle connected to the passage to convert the pressure of the heavier gas stream to velocity adding a torque to the cylinder, and

e) an opening in the hollow shaft to receive and remove a produced and concentrated lighter gas stream from the cylinder.

6. The combination of claim 5 where the heavier gas stream consists of carbon dioxide and the lighter gas stream consists of methane.

7. The combination of claim 5 wherein seals are provided to isolate cylinder inlet and exit gas streams from each other and from gas surrounding the cylinder.

8. The combination of claim 5 wherein bearings are provided to support the shaft.

9. The combination of claim 5 wherein a prime mover is connected to the shaft to rotate the cylinder.

10. A cascade of centrifuges as defined in claim 6.

11. The combination of claim 5 wherein the heavier gas stream consists essentially of carbon dioxide and the lighter gas stream consists of another gas.

12. The combination of claim 11 wherein the heavier gas stream consists of carbon dioxide, and the lighter gas stream consists of methane.

13. A gas centrifuge comprising, in combination:

a) a first nozzle accelerating a gas mixture and introducing it into a rotating cylinder, adding torque to the cylinder,

b) said cylinder having associated vanes to receive torque from the flowing gas and causing the gas to rotate with the same angular speed as the cylinder,

c) a radial passage connected to the periphery of the cylinder operating to pressurize a produced and concentrated heavier gas stream,

d) a second nozzle connected to the passage and operating to convert the pressure of the heavier gas stream to velocity, adding torque to the cylinder,

e) an open scoop oriented perpendicular to the direction of rotation operating to remove a produced and concentrated lighter gas from the cylinder, and

f) a passage contoured and operating to recover the velocity head of the concentrated lighter gas as pressure.

14. The combination of claim 13 where the heavier gas stream consists of carbon dioxide and the lighter stream consists of methane.

15. The combination of claim 13 wherein seals are provided to isolate cylinder inlet and exit gas streams from each other and from the gas surrounding the cylinder.

16. The combination of claim 13 wherein bearings are provided to support the shaft.

17. The combination of claim 13 wherein a prime mover is connected to the shaft to rotate the cylinder.

18. The combination of claim 13 including a shaft supporting the cylinder for rotation, and a housing enclosing and supporting the shaft.

19. The combination of claim 18 wherein said first nozzle is carried by the housing, at one end of the cylinder.

20. The combination of claim 19 wherein said second nozzle is located near the opposite end of the cylinder, said vanes located between said first and second nozzles.

21. A cascade of centrifuges as defined in claim 14, for successively increasing concentrations of carbon dioxide and methane in said streams.

22. The combination of claim 13 wherein the heavier gas stream consists essentially of carbon dioxide and the lighter gas stream consists of another gas.

23. A gas centrifuge comprising, in combination:

a) a first nozzle accelerating a gas mixture and introducing it into a rotating cylinder, adding torque to the cylinder,

b) said cylinder having associated vanes to receive torque from the flowing gas and causing the gas to rotate with the same angular speed as the cylinder,

c) a first radial passage connected to the periphery of the cylinder operating to pressurize a produced and concentrated heavier gas stream,

d) a second nozzle connected to the first passage and operating to convert the pressure of the heavier has stream to velocity, adding torque to the cylinder,

e) a second radial passage connected to the periphery of the cylinder operating to pressurize a produced and concentrated lighter gas stream,

f) a third nozzle connected to the second passage and operating to convert the pressure of the lighter gas stream to velocity adding torque to the cylinder.

24. The combination of claim 23 where the heavier gas stream consists of carbon dioxide and the lighter stream consists of methane.

25. The combination of claim 23 wherein seals are provided to isolate cylinder inlet and exit gas streams from each other and from the gas surrounding the cylinder.

26. The combination of claim 23 wherein bearings are provided to support the shaft.

27. The combination of claim 23 wherein a prime mover is provided and is connected to the shaft to rotate the cylinder.

28. A cascade of centrifuges as defined in claim 24.

29. The combination of claim 23 wherein the heavier gas stream consists essentially of carbon dioxide and the lighter gas stream consists of another gas.

30. A method that includes

a) providing a mixture of gases having carbon dioxide and/or other heavy gases and methane components, and also providing a rotary centrifuge,

b) operating the rotary centrifuge to separate said components into separate streams,

c) using the separated stream of carbon dioxide and methane to produce torque acting to aid rotation of the centrifuge.

31. The method of claim 30 including using said mixture received by the centrifuge as a flowing stream to produce torque acting to aid rotation of the centrifuge.

32. The method that includes

a) providing a rotary centrifuge to receive a mixture of gases having carbon dioxide and/or other heavy gases and methane components,

b) operating the rotary centrifuge to separate said components into separate streams,

c) using the separated streams of carbon dioxide and methane to produce torque acting to aid rotation of the centrifuge,

d) and including providing vanes in the centrifuge to receive and pass a gaseous mixture.

33. A centrifugal gas processing system comprising:

a) a first centrifugal means to separate free liquids from gas, light liquids from heavy liquids, and solids from liquids,

b) a second centrifugal means to extract liquids from said gas by lowering the pressure and temperature and separating the formed liquids from the gas,

c) a third centrifugal means to process said gas thereby to separate heavy gases from light gases,

d) there being vanes associated with it least one of said second and/or third centrifugal means to receive and pass a mixture of gases or a gas/liquid mixture with turbine effect.

34. The combination of the claim 33 system together with a means to inject a treatment liquid into said system for purposes of gas treatment.

35. A centrifugal gas processing system comprising:

a) a first centrifugal means to separate free liquids from gas, light liquids from heavy liquids, and solids from liquids,

b) a second centrifugal means to extract liquids from said a) gas by lowering the pressure and temperature and separating the formed liquids from the gas,

c) there being vanes connected with said second centrifugal means to receive a flowing stream of liquid, with turbine effect.

36. A centrifugal gas processing system comprising in combination:

a) a first centrifugal means to extract liquids from gas by lowering the pressure and temperature and separating the formed liquids from the gas,

b) a second centrifugal means to process said gas thereby to separate heavy gases from light gases,

c) and means to inject a treatment liquid into said system first centrifugal means for purposes of gas processing.

37. A centrifugal gas processing system, comprising:

a) a first centrifugal means to separate free liquids from gas, light liquids from heavy liquids, and solids from liquids,

b) a second centrifugal means to extract liquids from said gas by lowering the pressure and temperature and separating the formed liquids from the gas,

c a third centrifugal means to process said gas thereby to separate heavy gases from light gases,

d and means to inject a treatment liquid into said first centrifugal means for purposes of gas processing.

38. A centrifugal gas processing system comprising in combination:

a) a first centrifugal means to extract liquids from gas by lowering the pressure and temperature and separating the formed liquids from the gas,

b) a second centrifugal means to process said gas thereby to separate heavy gases from light gases,

c) and including means to inject a treatment liquid into said first centrifugal means for purposes of gas treatment,

d) and vanes in the system to receive and be rotated by fluid flowing in the system, with turbine effect.

39. A gas processing system comprising

a) a centrifugal means to extract liquids from gas by lowering the pressure and temperature and separating the formed liquids from the gas,

b) means to inject a treatment liquid into said centrifugal means for purposes of gas treatment,

c) there being vanes in said centrifugal means to receive and pass a flowing gas/liquid mixture with turbine effect.

40. A system including a gas liquid separator and a gas centrifuge means, to receive a fluid stream and operating to separate carbon dioxide from another gas, there being vanes associated with said centrifuge means to receive the fluid stream, with turbine effect, and there being means to inject a treatment fluid to flow into the gas liquid separator for purposes of fluid treatment.