Apparatus for the separation of gas mixtures into component fractions according to their molecular or atomic weight

• US 4,070,171 A
• Filed: 03/31/1976
• Issued: 01/24/1978
• Est. Priority Date: 09/29/1969
• Status: Expired due to Term

• Current Assignee: Nils A.L. Wikdahl
• Original Assignee: Nils A.L. Wikdahl
• Inventors: Wikdahl, Nils A. L.
• Primary Examiner(s): Nozick, Bernard
• Application Number:
  US05/672,377
• Time in Patent Office: 664 Days
• Field of Search: 55/17, 55/261, 55/459, 55/345, 55/419, 233/DIG. 1, 233/27
• US Class Current: 55/419
• CPC Class Codes: B01D 53/24 by centrifugal force centrifuges B04B; cyclones B04C
• CPC Class Codes: B01D 59/20 Separation by centrifuging
• CPC Class Codes: B04C 5/00 Apparatus in which the axial direction of the vortex is reversed combined with other devices B04C9/00
• CPC Class Codes: B04C 5/04 Tangential inlets
• CPC Class Codes: B04C 5/081 Shapes or dimensions
• CPC Class Codes: B04C 5/26 for series flow
• CPC Class Codes: B04C 5/28 for parallel flow

Abstract

An apparatus is provided for separation of gas mixtures into component fractions according to their molecular or atomic weight, comprising a housing having a separator chamber therein that is circular in cross-section, has an apex end and a base end, and a diameter at the base end of at most 5 mm. A gas inlet at the base end is arranged for tangential flow of gas into the chamber, to establish a vortical gas flow from the base end towards the apex end. Gas outlets in the housing at the base end and the apex end are in axial alignment, the apex end outlet receiving peripheral vortical gas flow, and the base end outlet receiving core vortical gas flow, the lower molecular or atomic weight components being concentrated in the core flow, and the higher molecular or atomic weight components being concentrated in the peripheral flow, due to the centrifugal force applied in the vortex.

Claims

1. A vortex separator for separating gaseous mixtures into component fractions according to their molecular or atomic weight, comprising a housing having a separator chamber therein that is cone-shaped at least in part, and in the cone-shaped portion is circular in cross-section, has an apex end and a base end, has an end wall at the base end, and side walls extending therefrom to the apex end;

has a diameter at the base end of at most 5 mm, and a diameter at the apex end of at least 0.01 mm;

has a length of at least 0.1 mm and not greater than 200 mm, and has a cone angle within the range from 1°

to 90°

;

at least one gas inlet through the housing at the base end of the chamber, arranged for tangential flow of gas from outside the housing into the chamber, to establish a vortical gas flow in the chamber from the base end towards the apex end, with the gaseous components distributed towards the periphery of the vortex with increasing molecular or atomic weight, and towards the core of the vortex with decreasing molecular or atomic weight;

an outlet through the housing in axial alignment to the chamber at the base end of the chamber; and

an outlet at the apex end of the chamber;

the apex end outlet receiving peripheral vortical gas flow from the chamber and the base end outlet receiving core vortical gas flow from the chamber;

the ratio of the diameter of the separator chamber at the base of the cone to the diameter of the separator chamber at the apex outlet D _base / D _apex outlet being within the range from about 1.3 to about 3.5, and the ratio of the diameter of the separator chamber at the base of the cone to the diameter of the separator chamber at the core outlet D _base / D _core outlet being within the range from about 1.3 to about 3.5.

2. A vortex separator according to claim 1, wherein a tubular baffle extends from the base outlet into the chamber to a point beyond the inlet, to deflect gas inlet flow away from the base outlet.

3. A vortex separator according to claim 1, in which the chamber is at most 200 mm. long.

4. A vortex separator according to claim 1, in which the sides of the chamber define a straight- and smooth-sided conical space.

5. A vortex separator according to claim 1, in which the gas inlets are at least two in number, and uniformly spaced.

6. A vortex separator according to claim 1, in which the gas inlets are constructed to give a supersonic inlet flow velocity.

7. A vortex separator according to claim 1, in which the chamber is conical at least in a major portion.

8. A vortex separator according to claim 1, in which the maximum chamber diameter is less than 2 mm.

9. A vortex separator according to claim 1, in which the cone angle of the apex end of the conical portion of the chamber is within the range from 1°

to 90°

.

10. A vortex separator for separating gaseous mixtures into component fractions according to their molecular or atomic weight, comprising a housing having a separator chamber therein that is circular in cross-section, has a first end and a second end;

has an end wall at the first end and side walls extending therefrom to the second end;

has a diameter at the first end of at most 5 mm and a diameter at the second end of at least 0.01 mm;

has a length of at least 0.1 mm and not greater than 200 mm, and has a cone angle within the range from 1°

to 90°

;

at least one gas inlet through the housing at the first end of the chamber, arranged for tangential flow of gas from outside the housing into the chamber, to establish a vortical gas flow in the chamber from the first end towards the secnd end, with the gaseous components distributed towards the periphery of the vortex with increasing molecular or atomic weight, and towards the core of the vortex with decreasing molecular or atomic weight;

an outlet through the housing in axial alignment to the chamber at the first end of the chamber; and

an outlet at the second end of the chamber, one of the end outlets receiving peripheral vortical gas flow from the chamber and the other end outlet receiving core vortical gas flow from the chamber;

the ratio of the diameter of the separator chamber at the base of the cone to the diameter of the separator chamber at the first end outlet D _base / D _first end outlet being within the range from about 1.3 to about 3.5, and the ratio of the diameter of the separator chamber at the base of the cone to the diameter of the separator chamber at the core outlet D _base / D _core outlet being within the range from about 1.3 to about 3.5.

11. A vortex separator according to claim 10, wherein a tubular baffle extends from the base outlet into the chamber to a point beyond the inlet, to deflect gas inlet flow away from the base outlet.

12. A vortex separator according to claim 10, in which the chamber is at most 200 mm. long.

13. A vortex separator according to claim 10, in which the sies of the chamber define a straight-and smooth-sided conical space.

14. A vortex separator according to claim 10, in which the gas inlets are at least two in number, and uniformly spaced.

15. A vortex separator according to claim 10, in which the gas inlets are constricted to give a supersonic inlet flow velocity.

16. A vortex separator according to claim 10, in which the chamber is conical in a major portion.

17. A vortex separator according to claim 10, in which the cone angle is within the range from about 1°

to about 90°

.

18. A vortex separator according to claim 10, in which the cone angle is within the range from about 3°

to about 30°

.