Filter systems with dirty air chamber spacer elements and methods of using the same

Patent metadata

Field	Value
Publication number	US-12134060-B2
Application number	US-202318228318-A
Country	US
Kind code	B2
Filing date	Jul 31, 2023
Priority date	May 17, 2012
Publication date	Nov 5, 2024
Grant date	Nov 5, 2024

Abstract

Filter systems and methods described herein include one or more spacer elements positioned in the dirty air chamber along with the filter elements attached to the spacer elements. The dirty air inlet delivers a dirty air stream into the dirty air chamber along a dirty air flow axis.

First claim

The invention claimed is:

1. A filter system comprising:
a housing comprising a tubesheet separating the housing into a dirty air chamber, a clean air chamber, an end wall panel located across the dirty air chamber from the tubesheet, and a hopper located below the dirty air chamber;
a plurality of spacer elements attached to the tubesheet, wherein each spacer element of the plurality of spacer elements comprises a clean air inlet and a clean air outlet, and wherein the clean air outlet of each spacer element of the plurality of spacer elements is attached to the tubesheet;
a plurality of apertures in the tubesheet, wherein the clean air outlet of each spacer element of the plurality of spacer elements is positioned over an aperture of the plurality of apertures in the tubesheet such that air passing from the dirty air chamber into the clean air chamber through each spacer element of the plurality of spacer elements passes through the aperture;
a plurality of filter elements, wherein each filter element of the plurality of filter elements is attached to the clean air inlet of one spacer element of the plurality of spacer elements, wherein each spacer element of the plurality of spacer elements and the filter element attached to each spacer element are positioned above the hopper; and
a dirty air inlet configured to deliver a dirty air stream into the dirty air chamber along a dirty air flow axis, wherein at least a portion of particulate matter entering the dirty air chamber through the dirty air inlet falls into the hopper under the force of gravity;
wherein the dirty air flow axis does not extend through any filter elements of the plurality of filter elements;
and wherein the dirty air flow axis extends through or passes at least one spacer element of the plurality of spacer elements at a location between the clean air inlet and the clean air outlet of the at least one spacer element.

2. A filter system according to claim 1 , wherein the dirty air flow axis extends through the hopper.

3. A filter system according to claim 1 , wherein each spacer element of the plurality of spacer elements and the filter element attached to each spacer element extend horizontally in the dirty air chamber above the hopper.

4. A filter system according to claim 1 , wherein each spacer element of the plurality of spacer elements comprises an element length measured along an element axis extending through the clean air inlet and the clean air outlet of the spacer element, and wherein the dirty air inlet defines a width measured parallel to the element axis that is less than or equal to 2 times an average element length of the plurality of element lengths of the plurality of spacer elements.

5. A filter system according to claim 1 , wherein the tubesheet comprises a dirty air side facing the dirty air chamber and a clean air side facing the clean air chamber, and wherein the clean air outlet of each spacer element of the plurality of spacer elements is positioned on the dirty air side of the tubesheet.

6. A filter system according to claim 1 , wherein each spacer element of the plurality of spacer elements does not extend into the clean air chamber.

7. A filter system according to claim 1 , wherein the plurality of spacer elements comprises a plurality of venturi elements, wherein each venturi element of the plurality of venturi elements comprises a throat located between a clean air inlet and a clean air outlet, and wherein the clean air inlet of each venturi element of the plurality of venturi elements is located in the dirty air chamber.

8. A filter system comprising:
a housing comprising a tubesheet separating the housing into a dirty air chamber, a clean air chamber, an end wall panel located across the dirty air chamber from the tubesheet, and a hopper located below the dirty air chamber;
a plurality of spacer elements attached to the tubesheet, wherein each spacer element of the plurality of spacer elements comprises a clean air inlet and a clean air outlet, and wherein the clean air outlet of each spacer element of the plurality of spacer elements is attached to the tubesheet;
a plurality of apertures in the tubesheet, wherein the clean air outlet of each spacer element of the plurality of spacer elements is positioned over an aperture of the plurality of apertures in the tubesheet such that air passing from the dirty air chamber into the clean air chamber through each spacer element of the plurality of spacer elements passes through the aperture;
a plurality of filter elements, wherein each filter element of the plurality of filter elements is attached to the clean air inlet of one spacer element of the plurality of spacer elements, wherein each spacer element of the plurality of spacer elements and the filter element attached to each spacer element are positioned above the hopper; and
a dirty air inlet configured to deliver a dirty air stream into the dirty air chamber along a dirty air flow axis, wherein the dirty air flow axis extends through the hopper, wherein the dirty air inlet comprises a perimeter where the dirty air inlet enters the dirty air chamber, wherein a projection of the perimeter parallel to the dirty air flow axis through the dirty air chamber does not intersect any filter elements of the plurality of filter elements.

9. A filter system according to claim 8 , wherein the dirty air flow axis does not extend through any filter elements of the plurality of filter elements.

10. A filter system according to claim 8 , wherein the dirty air flow axis extends through or passes at least one spacer element of the plurality of spacer elements at a location between the clean air inlet and the clean air outlet of the at least one spacer element.

11. A filter system according to claim 8 , wherein at least a portion of particulate matter entering the dirty air chamber passes directly into the hopper without contacting any filter element of the plurality of filter elements.

12. A filter system according to claim 8 , wherein the dirty air flow axis extends through the hopper.

13. A filter system according to claim 8 , wherein each spacer element of the plurality of spacer elements and the filter element attached to each spacer element extend horizontally in the dirty air chamber above the hopper.

14. A filter system according to claim 8 , wherein each spacer element of the plurality of spacer elements comprises an element length measured along an element axis extending through the clean air inlet and the clean air outlet of the spacer element, and wherein the dirty air inlet defines a width measured parallel to the element axis that is less than or equal to 2 times an average element length of the plurality of element lengths of the plurality of spacer elements.

15. A filter system according to claim 8 , wherein the tubesheet comprises a dirty air side facing the dirty air chamber and a clean air side facing the clean air chamber, and wherein the clean air outlet of each spacer element of the plurality of spacer elements is positioned on the dirty air side of the tubesheet.

16. A filter system according to claim 8 , wherein each spacer element of the plurality of spacer elements does not extend into the clean air chamber.

17. A filter system according to claim 8 , wherein the plurality of spacer elements comprises a plurality of venturi elements, wherein each venturi element of the plurality of venturi elements comprises a throat located between a clean air inlet and a clean air outlet, and wherein the clean air inlet of each venturi element of the plurality of venturi elements is located

Assignees

• Donaldson Co Inc

Inventors

• Raether Thomas D

Classifications

• B01D46/71

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

• B01D46/60

  arranged concentrically or coaxially · CPC title

• B01D46/2411

  Filter cartridges · CPC title

• B01D46/0043

  containing fixed gas displacement elements or cores · CPC title

• B01D46/0005 Primary

  Mounting of filtering elements within casings, housings or frames (B01D46/2422 takes precedence) · CPC title