Compact ozone generator with multi-gap electrode assembly

Patent metadata

Field	Value
Publication number	US-11639555-B2
Application number	US-201916965452-A
Country	US
Kind code	B2
Filing date	Jan 25, 2019
Priority date	Jan 29, 2018
Publication date	May 2, 2023
Grant date	May 2, 2023

Abstract

A device for generating ozone from oxygen-containing gas by silent electric discharge. At least two high-voltage electrodes and at least one ground electrode are nested. A discharge gap is defined between each high-voltage electrode and adjacent ground electrode. A dielectric is arranged in each discharge gap. In one embodiment, at least two discharge gaps are traversed by the gas, and a different voltage is applied to each gap according to the individual gap width. In another embodiment, filler material is arranged in an interstice between the high-voltage electrode and the corresponding dielectric, and the same amount of power is applied to each discharge gap.

First claim

The invention claimed is:

1. A device for generating ozone from oxygen-containing gas by silent electric discharge, the device comprising:
two or more high-voltage electrodes and one or more ground electrodes in a nested arrangement defining two or more nested discharge gaps located on a common cross-sectional plane, each nested discharge gap defined between a corresponding nested electrode pair, each corresponding nested electrode pair comprising one of the high-voltage electrodes and an adjacently nested one of the ground electrodes and having a corresponding individual gap width configured to be traversed by the gas;
two or more dielectrics, including at least one dielectric arranged in each nested discharge gap; and
at least one power source configured to supply a different voltage to each corresponding nested electrode pair according to the corresponding individual gap width.

2. The device of claim 1 , wherein the at least one power source comprises a transformer having a plurality of taps.

3. The device of claim 1 , wherein the at least one power source comprises an assigned power supply corresponding to each corresponding discharge gap.

4. The device of claim 1 , wherein one or more of: the two or more high-voltage electrodes, the one or more ground electrodes, and the two or more dielectrics, has a surface that is profiled to provide a distribution of individual gap widths.

5. The device of claim 1 , wherein each nested discharge gap is defined between one of the two or more high-voltage electrodes and a corresponding dielectric of the two or more dielectrics.

6. The device of claim 1 , comprising an odd number of the nested discharge gaps, wherein the one or more ground electrodes includes an inner ground electrode.

7. The device of claim 1 , wherein the two or more high-voltage electrodes, the one or more ground electrodes, and the two or more dielectrics each have an annular shape.

8. A method for ozone production, the method comprising the steps of:
(a) providing the device of claim 1 ;
(b) supplying a first voltage with a first voltage amplitude to a first high voltage electrode of the two or more high voltage electrodes, wherein the first voltage amplitude is higher than a first breakdown voltage (U C1 ) of a first discharge gap defined by the corresponding nested electrode pair comprising the first high voltage electrode;
(c) supplying a second voltage with a second voltage amplitude to a second high voltage electrode of the two or more high voltage electrodes, wherein the second voltage amplitude is higher than a second breakdown voltage (U C2 ) of a second discharge gap defined by the corresponding nested electrode pair comprising the second high voltage electrode;
(d) adjusting the first voltage amplitude and the second voltage amplitude such that a first power input of the first discharge gap and a second power input of the second input gap are the same; and
(e) supplying oxygen gas to the two or more nested discharge gaps and generating ozone by silent electric discharge within the each nested discharge gap.

9. The method of claim 8 , wherein the step of providing the device comprises providing a transformer having a plurality of taps including at least a first tap and a second tap, wherein the first voltage is supplied from the first tap and the second supply of voltage is provided from the second tap.

10. The method of claim 8 , wherein the step of providing the device comprises providing an assigned power supply to each of the two or more nested discharge gaps, wherein the first voltage is supplied from a first assigned power supply and the second voltage is supplied from a second assigned power supply.

11. The device of claim 1 , wherein the two or more high-voltage electrodes are concentrically nested.

Assignees

• Xylem Europe Gmbh

Inventors

• Fietzek Reiner
• Brueggemann Nicole
• Fiekens Ralf
• Salvermoser Manfred

Classifications

• C01B2201/14

  Concentric/tubular dischargers · CPC title

• C01B2201/32

  Constructional details of the dielectrics · CPC title

• C25B1/13

  Ozone · CPC title

• H01T23/00 Primary

  Apparatus for generating ions to be introduced into non-enclosed gases, e.g. into the atmosphere · CPC title

• C01B13/11 Primary

  by electric discharge · CPC title