Systems and methods for producing fine particles

• US 20070158450A1
• Filed: 09/25/2006
• Published: 07/12/2007
• Est. Priority Date: 09/09/2003
• Status: Abandoned Application

• Current Assignee: John Scattergood
• Original Assignee: John Scattergood
• Inventors: Scattergood, John
• Application Number:
  US11/526,301
• Publication Number:
  US 20070158450A1
• Time in Patent Office: Days
• US Class Current: 239/8
• CPC Class Codes: B22F 2009/084 combination of methods
• CPC Class Codes: B22F 9/082 atomising using a fluid using centrifugal force B22F9/10
• CPC Class Codes: B22F 9/10 using centrifugal force

Abstract

Systems and methods for atomizing materials are provided. In this regard, a representative system includes: a first unit operative to accelerate the material such that the material experiences an acceleration force higher than Earth'"'"'s standard gravitational force; and a second unit operative to use atomizing fluid to disturb the material; wherein, while the material is in liquid form and experiencing the acceleration force, liquid droplets of the material depart the exposed surface and become entrained in the atomizing fluid such that at least some of the liquid droplets aerosolize.

Claims

1. A method for atomizing a material comprising the steps of:

providing the material in liquid form;

accelerating the material such that the material, which is in liquid form, experiences an acceleration force higher than Earth'"'"'s standard gravitational force;

flowing an atomizing fluid across an exposed surface of the material while the material is experiencing the acceleration force;

while the exposed surface of the material is experiencing the acceleration force, causing liquid droplets of the material to depart the exposed surface of the material; and

entraining the liquid droplets of the material in the atomizing fluid flowing across the exposed surface of the material such that the liquid droplets aerosolize and create solid particles.

2. The method of claim 1, wherein causing the liquid droplets of the material to depart the exposed surface of the material comprises entrapping portions of the atomizing fluid within the material such that, while the material is experiencing the acceleration forces, the portions of the atomizing fluid within the material buoyantly travel to the exposed surface of the material and form at least some of the liquid droplets.

3. The method of claim 1, wherein causing the liquid droplets of the material to depart the exposed surface of the material comprises positioning a fluid within the material such that, while the material is experiencing the acceleration forces, the fluid within the material buoyantly travels to the exposed surface of the material and forms at least some of the liquid droplets.

4. The method of claim 1, wherein providing the material in liquid form comprises melting the material.

5. The method of claim 1, wherein, absent the acceleration force and with the operating parameters involving the material and the atomizing fluid being maintained, the solid particles created by the atomizing fluid flowing across the exposed surface of the material would be larger.

6. The method of claim 1, wherein accelerating the material comprises rotating the material about at least one axis.

7. A system for atomizing a material, said system comprising:

a first unit operative to accelerate the material such that the material experiences an acceleration force higher than Earth'"'"'s standard gravitational force; and

a second unit operative to flow atomizing fluid across an exposed surface of the material;

wherein, while the material is in liquid form and experiencing the acceleration force, liquid droplets of the material depart the exposed surface and become entrained in the atomizing fluid flowing across the exposed surface of the material such that at least some of the liquid droplets aerosolize.

8. The system of claim 7, further comprising a third unit operative to melt the material such that the material exhibits the liquid form.

9. The system of claim 8, wherein the third unit melts the material by directing a jet of the atomizing fluid at an elevated temperature.

10. The system of claim 7, further comprising:

means for containing the material.

11. The system of claim 7, further comprising:

a third unit operative to contain the material during at least a time during which the material is in liquid form and during which the liquid droplets become entrained in the atomizing fluid.

12. The system of claim 11, wherein the third unit comprises:

an inner portion; and

an outer portion spaced from the inner portion to form a gap therebetween, the outer portion being operative to rotate to generate the acceleration force; and

wherein, in operation, the atomizing fluid flows through the gap, in which the material is located in liquid form.

13. The system of claim 12, wherein the inner portion also is operative to rotate.

14. The system of claim 12, wherein the gap is defined by an inner surface of the outer portion, at least a portion of the inner surface being inclined inwardly toward an axis of rotation about which the outer portion rotates.

15. The system of claim 12, further comprising a circulating pump operative to draw material, in liquid form, from within the gap and to reintroduce the material back into the gap at a location downstream with respect to a flow direction of the atomizing fluid.

16. The system of claim 12, further comprising a region of the gap configured to separate aerosolized material from the atomizing fluid such that at least some of the aerosolized material contacts and adheres to the exposed surface of the material.

17. The system of claim 12, further comprising a nozzle operative to direct a jet of atomizing fluid such that the jet of atomizing fluid impinges upon the exposed surface of the material.

18. A system for atomizing a material, said system comprising:

a first unit operative to accelerate the material, which is in a liquid state, such that the material experiences an acceleration force higher than Earth'"'"'s standard gravitational force;

wherein the first unit has a permeable membrane positioned to contact the material such that an atomizing fluid provided to permeate the permeable membrane forms bubbles in the material that breach the exposed surface of the material while the material is experiencing the acceleration force and produce atomized particles of the material.

19. The system of claim 18, further comprising a second unit operative to flow a fluid across an exposed surface of the material while the material is experiencing the acceleration force such that the atomized particles of the material become entrained in the fluid flowing across the exposed surface.

20. The system of claim 19, wherein the first unit and the second unit are configured to use a single type of fluid as both the atomizing fluid and the fluid flowing across the exposed surface.

21. A method for atomizing a material comprising the steps of:

providing the material in liquid form;

accelerating the material such that the material, which is in liquid form, experiences an acceleration force higher than Earth'"'"'s standard gravitational force;

forming bubbles in the material while the material is experiencing the acceleration force; and

while the material with the bubbles therein is experiencing the acceleration force, enabling the bubbles to cause liquid droplets of the material to depart an exposed surface of the material and aerosolize.

22. The method of claim 21, further comprising entraining the liquid droplets of the material in a fluid flowing across the exposed surface of the material.

23. The method of claim 22, wherein a single type of fluid is used to form the bubbles and as the fluid flowing across the exposed surface.