Long life pyramidal filter for gas turbine inlet system

1. A filtration apparatus including:

at least three planar filter elements for filtering fluid; and

a frame having a pyramidal frustum configuration that has at least three sides and first and second base openings;

a frame structure for receiving and supporting the planar filter elements at the sides such that the filtration apparatus has a pyramidal frustum configuration; and

a cap located at the second base opening of the pyramidal frustum configuration to block fluid flow through the second base opening, with the first base opening permitting fluid flow through the first base opening.

2. The filtration apparatus of claim 1 , wherein the at least three filter elements includes more than three filter elements.

3. The filtration apparatus of claim 1 , wherein each of the filter elements includes filter media the filter media of the at least three filter elements has an area of approximately 50 m 2 .

4. The filtration apparatus of claim 1 , wherein each of the filter elements includes filter media and the filter media of at least one of the filter elements has a thickness of 50 mm.

5. The filtration apparatus of claim 1 , wherein each of the filter elements includes a support structure.

6. A filtration assembly including:

a first filtration apparatus and

a second filtration apparatus

each filtration apparatus including:

at least three planar filter elements for filtering fluid; and

a frame having a pyramidal frustum configuration that has at least three sides,

a frame structure for supporting the filter elements at the sides such that the respective filtration apparatus has a pyramidal frustum configuration, and the frame defining a first base opening and a second base opening;

wherein the first base opening of the first filtration apparatus is mounted facing the first base opening of the second filtration apparatus such that the first filtration apparatus and the second filtration apparatus form a bi-pyramidal frustum.

7. The filtration assembly of claim 6 , wherein each first base opening is larger than the second base opening.

8. The filtration assembly of claim 6 , wherein each filtration apparatus further including a cap located at the second base opening configured to prevent fluid flow through the second base opening.

9. The filtration assembly of claim 6 , wherein each of the filter elements includes filter media for each filtration apparatus the filter media of the at least three filter elements has an area of approximately 50 m 2 .

10. The filtration assembly of claim 6 , wherein each of the filter elements includes filter media the filter media of at least one of the filter elements has a thickness of 50 mm.

11. The filtration assembly of claim 6 , wherein each of the filter elements includes a support structure.

12. The filtration assembly of claim 6 , wherein each frame includes a plurality of members extending between each first base opening and each second base opening and where one of the plurality of members has an angle of up to 90° relative to a horizontal line.

13. A method of filtering a fluid with a filtration apparatus, the method including:

providing at least three planar filter elements for filtering fluid;

providing a frame having a pyramidal frustum configuration that has at least three sides and first and second base openings,

providing a frame structure for receiving and supporting the planar filter elements at the sides such that the filtration apparatus has a pyramidal frustum configuration;

providing a cap located at the second base opening of the pyramidal frustum configuration to block fluid flow through the second base opening;

drawing fluid in a first direction through a first base opening of the filtration apparatus and

filtering the drawn fluid through the at least planar three filter elements to collect particulate matter.

14. The method of claim 13 , further including the step of cleaning the filtration apparatus by applying a reverse pulse of fluid in a second direction through the first base opening to remove particulate matter from the filter media, wherein the second direction is opposite the first direction.