Dry gas extraction device and method
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.
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.
2. 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.
3. 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.
4. 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.
5. 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.
6. 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.
7. 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.
8. 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.
9. The device of claim 7 , wherein the at least one sealing device of the system comprises a dry gas seal.