Automatic gas well produced-water discharging and metering system and application method thereof

The invention discloses an automatic gas well produced-water discharging and metering system and an application method thereof. The automatic gas well produced-water discharging and metering system comprises a water storage tank communicated between a separator and a waste water tank of a gas well, an upper water solenoid valve switch is arranged between the water storage tank and the separator, a lower water solenoid valve switch is arranged between the water storage tank and the waste water tank, and a liquid level transmitter capable of monitoring the water storage tank in real time is further arranged on the water storage tank; the automatic gas well produced-water discharging and metering system further comprises a PLC (programmable logical controller) which is connected with the liquid level transmitter, the upper water solenoid valve switch, the lower water solenoid valve switch and a display screen respectively. Automatic produced-water discharging and metering can be realized by dealing with high and