EXTRACTING DRY GAS FROM A WET-GAS COMPRESSOR Russian patent published in 2018 - IPC F04D31/00 

FIELD: non-displacement compressors and pumps.

SUBSTANCE: wet-gas centrifugal compressor (1) is disclosed. Compressor comprises compressor casing (3) and at least one impeller (9) arranged in the compressor casing for rotation around rotation axis (A-A). Stationary diffuser (21) is arranged in the compressor casing and extends around impeller (9). Diffuser (21) has curved end portion (21A) with radially inner curved wall (27) and radially outer curved wall (29). Plurality of dry-gas extraction holes (35) is provided, ending at a plurality of respective inlet ports arranged around the rotation axis and on the inner curved wall of the curved end portion of the diffuser. Each dry-gas extraction hole extends from the respective inlet port towards the rotation axis and is inclined over a radial direction, such that each dry-gas extraction hole (35) is oriented in a counter-flow direction with respect to a direction of the gas flow in curved end portion (21A) of diffuser (21).

EFFECT: providing various components of the compressor with dry gas extracted from the main gas flow processed by the compressor.

15 cl, 7 dwg