Drain discharge equipment for compressor and gas turbine system

A drain discharge equipment of a compressor having a separator 13A, 13B for separating drain discharged from the compressor to compressed air and liquid drain, which is disposed on some part of a drain capture pipe 7, 8 connected between stages and/or to an outlet of the compressor to compress air with a liquid sprayed, and discharging the liquid drain separated by the separator 13A, 13B to outside the compressor through a discharge pipe system 11A, 11B, characterized in that the separator 13A, 13B is provided with a device for intermittently discharging the liquid drain separated by the separator to the discharge pipe system.