Systems and methods for cleaning particulate filters

Patent metadata

Field	Value
Publication number	US-11517846-B2
Application number	US-202016786662-A
Country	US
Kind code	B2
Filing date	Feb 10, 2020
Priority date	Feb 14, 2019
Publication date	Dec 6, 2022
Grant date	Dec 6, 2022

Abstract

A method for cleaning a particulate matter filter is discussed. The particulate filter can include an inlet and an outlet, where the outlet includes openings to a plurality of outlet channels, and the inlet includes openings to a plurality of inlet channels. The outlet channels and the inlet channels are separated by a filer barrier. A fluid nozzle is positioned in contact with the outlet of the particulate filter over a first set of outlet channels. Fluid form the fluid nozzle is injected into the first set of outlet channels. While injecting the fluid, the position of the fluid nozzle is changed such that the fluid nozzle is positioned over a second set of outlet channels.

First claim

What is claimed is:

1. A method for cleaning a particulate filter having an outlet and an inlet, the outlet including openings to a plurality of outlet channels, the inlet including openings to a plurality of inlet channels, the outlet channels being separated from the inlet channels by a filter barrier, the method comprising:
positioning a fluid nozzle in contact with the outlet of the particulate filter over a first set of outlet channels, the fluid nozzle comprising:
a first end in communication with a fluid source,
a second end adjacent to the outlet,
an elongated stem extending between the first end and the second end,
a clamp positioned around the elongated stem and adjacent to the first end, and
a movable arm coupled to and extending from the clamp;

injecting a fluid from the fluid nozzle into the first set of outlet channels; and
repositioning the fluid nozzle after injecting the fluid into the first set of outlet channels so as to cause translation of the clamp along the elongated stem.

2. The method of claim 1 , further comprising, while injecting fluid from the fluid nozzle, varying a position of the fluid nozzle over the outlet to a second set of outlet channels.

3. The method of claim 1 , wherein the fluid comprises a liquid.

4. The method of claim 2 , wherein injecting fluid from the fluid nozzle comprises injecting a liquid at a pressure between 15 pounds-per-square-inch and 300 pounds-per-square-inch.

5. The method of claim 1 , wherein the fluid nozzle further comprises a biasing member positioned between the clamp and the second end.

6. The method of claim 1 , wherein the fluid comprises air.

7. The method of claim 6 , wherein the fluid nozzle is a first fluid nozzle, and wherein the method further comprises:
positioning a second fluid nozzle at the inlet of the particulate filter;
injecting a continuous stream of air from the second fluid nozzle into a first subset of inlet channels, at least one inlet channel of the first subset of inlet channels being adjacent to at least one outlet channel of the first set of outlet channels;
wherein injecting fluid from the first fluid nozzle into the first set of outlet channels includes injecting pulsed compressed air into the first subset of inlet channels.

8. The method of claim 2 , further comprising:
positioning the particulate filter upon a platform, the platform configured to rotate in a first direction;
wherein varying the position of the fluid nozzle over the outlet to the second set of outlet channels includes actuating the movable arm to move the fluid nozzle in a linear direction over the outlet channels includes actuating the arm to move the fluid nozzle in a linear direction over the outlet while the platform is rotating.

9. A method for cleaning a particulate filter having an outlet and an inlet, the outlet including openings to a plurality of outlet channels, the inlet including openings to a plurality of inlet channels, the outlet channels being separated from the inlet channels by a filter barrier, the method comprising:
positioning a first fluid nozzle in contact with the outlet of the particulate filter over a first set of outlet channels, the first fluid nozzle comprising:
a first end in communication with a fluid source,
a second end adjacent to the outlet,
an elongated stem extending between the first end and the second end,
a clamp positioned around the elongated stem and adjacent to the first end, and
a movable arm coupled to and extending from the clamp;

positioning a second fluid nozzle adjacent to the inlet of the particulate filter over a first inlet channel;
injecting a first fluid from the first fluid nozzle into the first set of outlet channels;
repositioning the first fluid nozzle after injecting the first fluid into the first set of outlet channels so as to cause translation of the clamp along the elongated stem; and
injecting a second fluid from the second fluid nozzle into the first inlet channel;
wherein:
the first fluid is injected from the first fluid nozzle when the second fluid nozzle is not operating; or
the second fluid is injected from the second fluid nozzle when the first fluid nozzle is not operating.

10. The method of claim 9 , wherein the second fluid nozzle is positioned opposite the first fluid nozzle.

11. The method of claim 10 , wherein the first fluid is injected from the first fluid nozzle when the second fluid nozzle is not operating.

12. The method of claim 10 , wherein the second fluid is injected from the second fluid nozzle when the first fluid nozzle is not operating.

13. The method of claim 10 , further comprising:
alternating between a first operational mode and a second operational mode, the first operational mode comprising injecting the first fluid from the first fluid nozzle when the second fluid nozzle is not operating, the second operational mode comprising injecting the second fluid from the second fluid nozzle when the first fluid nozzle is not operating.

14. The method of claim 13 , wherein the first fluid is a liquid and the second fluid is air.

15. The method of claim 13 , further comprising:
positioning the particulate filter upon a platform, the platform configured to rotate in a first direction;
actuating the movable arm to vary a position of the first fluid nozzle over the outlet to a second set of outlet channels; and
rotating the platform in the first direction to vary the position of the second fluid nozzle over the inlet to a second inlet channel.

16. A system, comprising:
a filter housing having a top portion and a bottom portion, the filter housing configured to surround a particulate filter having an outlet and an inlet, the outlet including openings to a plurality of outlet channels, the inlet including openings to a plurality of inlet channels, the outlet channels being separated from the inlet channels by a filter barrier;
a platform coupled to the bottom portion, the platform defining an opening adjacent to the inlet when the particulate filter is surrounded by the filter housing;
a first fluid nozzle positioned in contact with to the outlet when the particulate filter is surrounded by the filter housing, the first fluid nozzle in fluid communication with a first fluid source, the first fluid nozzle comprising:
a first end in communication with the first fluid source,
a second end adjacent to the outlet,
an elongated stem extending between the first end and the second end,
a clamp positioned around the elongated stem and adjacent to the first end such that repositioning of the first fluid nozzle along the outlet causes translation of the clamp along the elongated stem, and
a movable arm coupled to and extending from the clamp; and

a second fluid nozzle positioned adjacent to the inlet when the particulate filter is surrounded by the filter housing, the second fluid nozzle in fluid communication with a second fluid source.

17. The system of claim 16 , wherein the first fluid nozzle further comprises a biasing member positioned between the clamp and the second end.

18. The system of claim 17 , wherein the biasing member biases the second end toward the outlet so as to maintain contact between the second end and the outlet when the particulate filter is surrounded by the filter housing.

19. The system of claim 18 , wherein the first fluid nozzle is configured to direct a fluid into the outlet when the particulate filter is surrounded by the filter housing.

20. The system of claim 16 , wherein the second fluid nozzle i

Assignees

• Cummins Inc

Inventors

• Chilumukuru Krishna Pradeep
• Wieland Todd M
• Zazueta Luis Fernando Loo

Classifications

• B01D46/2418

  Honeycomb filters (used for filtering exhaust gases of an internal combustion engine F01N3/022; ceramic honeycomb structures per se C04B38/0006) · CPC title

• B01D46/71

  with pressurised gas, e.g. pulsed air · CPC title

• F01N3/0237 Primary

  for regenerating ex situ · CPC title

• B01D46/681 Primary

  by scrapers, brushes or the like · CPC title

• B01D2279/30

  for treatment of exhaust gases from IC Engines · CPC title