# US 10,871,173 B2 · Dry gas extraction device and method

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- Number: US 10,871,173 B2
- Document ID: US10871173B2
- Status: Granted
- Kind: B2
- Application number: 15/312,669
- Filed: 2015-05-22
- Published: 2017-06-29
- Granted: 2020-12-22
- Earliest claimed: 2014-05-26
- Assignees: Nuovo Pignone S.p.A.
- Applicants: NUovo Pignone Srl
- Inventors: Matteo Bertoneri
- Web page: https://patentgrep.com/patent/US10871173B2

## CPC

- F04D 29/706: {Humidity separation}
- F04D 17/122: {the individual rotor discs being, one for each stage, on a common shaft and axially spaced, e.g. conventional centrifugal multi- stage compressors}
- F04D 29/083: {especially adapted for elastic fluid pumps}
- F04D 29/104: {the sealing fluid being other than the working fluid or being the working fluid treated}
- F04D 29/124: {with special means for adducting cooling or sealing fluid}
- F04D 29/286: {multi-stage rotors}
- F04D 29/4206: {especially adapted for elastic fluid pumps}
- F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02)

## Abstract

A dry gas extraction device is described, for extracting a dry gas from a wet gas flow. The device comprises a wet gas duct having a side wall surrounding an inner gas flow volume. The device further comprises at least one dry gas intake port located in a position inside the gas flow volume at a distance from the side wall.

## Claims

### Claim 1

A dry gas extraction device for extracting a dry gas from a wet gas flow, the device comprising:
a wet gas duct having a side wall surrounding an inner gas flow volume;
at least one dry gas intake port located in a position inside the gas flow volume at a distance from the side wall; and
a projection extending inwardly from the side wall, the at least one dry gas intake port arranged on the projection; and
a flange surrounding the inner gas flow volume, the projection extending diametrically across the flange,
wherein the cross section of the projection is shaped for optimizing a flow condition around the projection.

### Claim 2 (depends on 1)

The device of claim 1, wherein the at least one dry gas intake port has an inlet oriented in counter-flow direction with respect a wet gas flow direction in the wet gas duct.

### Claim 3 (depends on 1)

The device of claim 1, wherein the projection extends across the inner gas flow volume, the projection having a first end and a second end connected at opposite positions to the side wall.

### Claim 4 (depends on 1)

The device of claim 1, wherein the projection has a leading side and a trailing side, the trailing side arranged downstream of the leading side with respect to the wet gas flowing direction in the wet gas duct.

### Claim 5 (depends on 4)

The device of claim 4, wherein the at least one dry gas intake port is located on the projection at a distance from the leading side, between the leading side and the trailing side, or at the trailing side.

### Claim 6 (depends on 1)

The device of claim 1, wherein the at least one dry gas intake port is arranged in a position substantially lying on the axis of the wet gas duct.

### Claim 7 (depends on 1)

The device of claim 1 arranged in a wet gas line of a system, the system comprising:
a wet gas compressor;
at least one sealing device arranged between a rotary member and a stationary member of the wet gas compressor; and
a dry gas flow path fluidly connecting the at least one dry gas intake port to the at least one sealing device.

### Claim 8 (depends on 7)

The system device of claim 7, wherein the wet gas line of the system is arranged to receive compressed gas at a delivery side of the wet gas compressor.

### Claim 9 (depends on 7)

The device of claim 7, wherein the at least one sealing device of the system comprises a dry gas seal.