Gas injection and brine discharge monitoring equipment, system and method for salt-cavern gas storage

The invention provides a salt-cavern gas storage gas injection and brine discharge monitoring device, system and method, and the device comprises a gas-liquid interface monitoring device which is used for monitoring the gas-liquid interface information of a salt-cavern gas storage; the controller is electrically connected with the gas-liquid interface monitoring device and used for receiving the gas-liquid interface information sent by the gas-liquid interface monitoring device and converting the gas-liquid interface information into a driving signal; and the information transmission assembly is electrically connected with the controller and is used for receiving the driving signal sent by the controller, forming a liquid pulse signal according to the driving signal and transmitting the liquid pulse signal to a receiver through a liquid transmission channel. The depth change of the gas-liquid interface in the salt cavern cavity can be monitored, so that the bittern discharging efficiency and the bittern disch