SYSTEM AND METHOD FOR DRAINING A WET-GAS COMPRESSOR

A wet-gas compressor is described, comprising a compressor casing and a rotor, for rotation in the compressor casing and comprised of at least one impeller. In the compressor casing, a cavity is provided, where liquid contained in a wet gas can collect during operation of the compressor. A drain port is at the bottom of the cavity and a vent port is above the drain port of the cavity. The drain port and vent port are in fluid communication with a liquid-level measuring chamber. A level gauge is provided at the liquid-level measuring chamber and a drainage valve for discharging liquid from the cavity towards a liquid discharge line connected to the drain port. A control arrangement receives a signal from the level gauge and controls the opening of the drainage valve liquid in the liquid-measuring chamber reaches a threshold level.