Atomizing nozzle device, atomizing process and use

Patent metadata

Field	Value
Publication number	US-10220398-B2
Application number	US-201214127342-A
Country	US
Kind code	B2
Filing date	Jul 9, 2012
Priority date	Jul 11, 2011
Publication date	Mar 5, 2019
Grant date	Mar 5, 2019

Abstract

The invention relates to a new atomizing device with improved droplet formation. Smaller droplets are formed with increased micronized volume throughput, wherein high volumes of air are fed to a liquid sprayed from a liquid nozzle (2). High volume ratios result in mean free path between droplets being conveyed so as to minimize collisions and to prevent aggregation of the droplet.

First claim

The invention claimed is:

1. An atomizing device comprising (a) an atomizer nozzle tip configured to spray atomized liquid, wherein the atomizer nozzle tip has an entrance, (b) a liquid nozzle configured to create a full or a hollow cone spray, (c) a central lance tube connected to the liquid nozzle, (d) a liquid inlet configured to feed liquid to the central lance tube, (e) an air transition cone disposed at the entrance of the atomizer nozzle tip and integral with the atomizer nozzle tip, wherein the air transition cone surrounds in a circular manner the liquid nozzle and defines a co-current ring between the air transition cone and the liquid nozzle for receiving gas, (f) a housing having (i) a converging air header, and (ii) at least one air inlet for supplying gas as a co-current ring around the liquid nozzle between the liquid nozzle and the air transition cone, and (g) a high shear zone disposed at the entrance of the atomizer nozzle tip, wherein droplets from the liquid nozzle converge with gas from the converging air header at a volume ratio of gas to liquid sprayed from the liquid nozzle of 100:1 to 8000:1, and wherein the position of the liquid nozzle is configured to be adjustable from within to out of the air transition cone in a direction toward the atomizer nozzle tip.

2. The atomizing device according to claim 1 , wherein the atomizer nozzle tip and the air transition cone are connected with each other.

3. The atomizing device according to claim 2 , wherein the atomizer nozzle tip connected with the air transition cone are reversibly connected to the housing.

4. The atomizing device according to claim 1 , further comprising a transition element at the end of the atomizer nozzle tip.

5. The atomizing device according to claim 1 , wherein the liquid nozzle and the central lance tube are movable forward and backward inside the air transition cone.

6. The atomizing device according to claim 1 , wherein the housing comprises two movable overlapping parts that slide relative to each other, where one housing part comprises the atomizer nozzle tip connected to the air transition cone, and the other housing part is connected to the central lance tube and the air inlet, such that the liquid nozzle and the central lance tube are movable forward and backward inside the air transition cone.

7. The atomizing device according to claim 1 , wherein the atomizer nozzle tip is connected to the air transition cone on a mounting device.

8. The atomizing device according to claim 7 , wherein the mounting device is a nozzle tip mounting flange.

9. The atomizing device according to claim 1 , further comprising one or more spacing plates disposed between the atomizer nozzle tip and the central lance tube.

10. The atomizing device according to claim 1 , further comprising a diffuser plate disposed between the air transition cone and the at least one air inlet.

11. The atomizing device according to claim 1 , wherein the air transition cone has an opening angle from 0° to 180°.

12. The atomizing device according to claim 1 , wherein atomizer tip has a diameter and the housing has a diameter, and the ratio of the diameters of the atomizer nozzle tip and the housing are from 1:1 to 1:10.

13. The atomizing device according to claim 1 , wherein the atomizer tip has a diameter and the housing has a diameter, and ratio of the diameters of the atomizer nozzle tip and the housing are from 1:1 to 1:7.

14. The atomizing device according to claim 1 , wherein the atomizer tip has a diameter and the housing has a diameter, and ratio of the diameters of the atomizer nozzle tip and the housing are from 1:1 to 1:4.

15. The atomizing device according to claim 1 , wherein the atomizer nozzle tip has a length to diameter ratio of from about 50:1 to about 0.5:1.

16. The atomizing device according to claim 1 , wherein the atomizer nozzle tip has a length to diameter ratio of from about 20:1 to about 1:1.

17. The atomizing device according to claim 1 , wherein the atomizer nozzle tip has a length to diameter ratio of from about 15:1 to about 5:1.

18. The atomizing device according to claim 1 , wherein the atomizer nozzle tip has an angular offset of 180° to 90°.

19. The atomizing device according to claim 1 , further comprising a mixing chamber that is disposed between the central lance tube and the liquid inlet.

20. The atomizing device according to claim 18 , wherein the mixing chamber is a static mixing device or a high shear mixing device.

Assignees

• Saunders George
• Kittredge Ryan
• Omya Int Ag

Inventors

• Saunders George
• Kittredge Ryan

Classifications

• B05B7/267

  the liquid and the gas being both under pressure · CPC title

• B05B1/34

  designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl (designed to control volume of flow B05B1/30) · CPC title

• B05B7/0491

  the liquid and the gas being mixed at least twice along the flow path of the liquid · CPC title

• A01M7/0003 Primary

  Atomisers or mist blowers (single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use B05B11/00) · CPC title

• B05B7/0475 Primary

  with means for deflecting the peripheral gas flow towards the central liquid flow (B05B7/0458 takes precedence) · CPC title