Vacuum preloading water-gas separation energy-saving control device

The utility model relates to a vacuum preloading water-gas separation energy-saving control device, which comprises a water-gas separation tank, a vacuum pump, a jet pump, a liquid level controller, an electric contact vacuum meter and a control electric box, a first connecting port connected with the liquid level controller, a second connecting port connected with an air inlet of the vacuum pump and a third connecting port connected with the electric contact vacuum meter are formed in the top of the water-air separation tank, and a first inlet and a second inlet are formed in the bottom of the water-air separation tank. According to the utility model, the upper limit switch and the lower limit switch are arranged in the liquid level controller, and the lower limit switch and the upper limit switch are arranged in the electric contact vacuum meter, so that the system can automatically control the start and stop of the pump set, and the upper and lower limit thresholds of the vacuum pressure and the water leve