Selection Method tank exhaust means and an exhaust tank

The present invention discloses a method of selection and the exhaust tank of the tank exhaust means, an exhaust tank means for discharging gas in the tank, tank exhaust prepared as porous media cylinder , the top end of the tank vent associated cylinder; coating the outer surface of the porous medium with a non-wetting coating material; aperture along the radial direction of tank exhaust pores in the porous dielectric material gradually increases, whereby in the case of two-phase flow into the tank liquid tank wherein the liquid discharge means causing flow of the surface tension in the radial direction of the tank exhaust gas discharging means, and thus realize the two-phase flow gas-liquid separation tank to solve the conventional exhaust gas-liquid separator is not considered to cause propellant management device-dependent major technical problems, reduce the existing tank must rely upon the exhaust gas propellant management apparatus forming large bubbles dependence of gas-liquid separation is achieved.