Filtering chamber for gas turbines and method of maintenance thereof
AssigneeNuovo Pignone S.p.A.
InventorsMarco SANTINI, Giorgio MARCHETTI
Life of this patent
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Abstract
A filter system for filtering intake air of a gas turbine, comprising a first filter arrangement and a second filter arrangement, located downstream from the first filter arrangement and having a higher collection efficiency than the first filter arrangement. Furthermore, a guard filter arrangement, having a lower collection efficiency than the first filter arrangement, is located between the first filter arrangement and the second filter arrangement.
Claims19
A filter system for filtering intake air of a gas turbine, comprising:
- a first filter arrangement;
- a second filter arrangement, located downstream from the first filter arrangement and having a higher collection efficiency than the first filter arrangement;
- wherein a first guard filter arrangement, having a lower collection efficiency than the first filter arrangement, is located between the first filter arrangement and the second filter arrangement.
A method for the maintenance of a filter system configured to provide air to a gas turbine, the filter system comprising:
- a first filter arrangement, a second filter arrangement located downstream from the first filter arrangement and having a collection efficiency equal to or higher than the first filter arrangement, a first guard filter arrangement located between the first filter arrangement and the second filter arrangement and having a collection efficiency lower than said first filter arrangement;
- said method comprising the step of replacing filtration elements of the first filter arrangement, while the gas turbine is online, preventing dirt from the first filter arrangement from reaching the second filter arrangement by means of the first guard filter arrangement.
A method for the maintenance of a filter system configured to provide air to a gas turbine, the filter system comprising:
- a filter chamber with an air inlet and an air outlet, a first filter arrangement having a first collection efficiency located in the filter chamber, a second filter arrangement having a second collection efficiency or equal to or higher than the first collection efficiency and located in the filter chamber downstream from the first filter arrangement, a first guard filter arrangement located in the filter chamber between the first filter arrangement and the second filter arrangement and having a collection efficiency lower than the first filtration arrangement, said first guard filter arrangement dividing the filter chamber into an upstream volume and a downstream volume, a second guard filter between the second filter arrangement and the air outlet, said second guard filter arrangement having a collection efficiency lower than said second filtration arrangement;
- said method comprising the steps of:
- opening the upstream volume;
- entering the upstream volume;
- replacing filtration elements of the first filter arrangement, preventing dirt from the first filter arrangement from reaching the second filter arrangement by means of the first guard filter arrangement, exiting the upstream volume;
- closing the upstream volume;
- opening the downstream volume;
- entering the downstream volume;
- replacing filtration elements of the second filter arrangement, preventing extraneous matter or dirt from exiting the filter chamber by means of the second guard filter arrangement;
- said steps being performed while the gas turbine is online.
Dependencies are inferred from the claim text.