Gas storage system capable of maintaining stable pressure in pressurized storage tank

A gas storage system capable of maintaining stable pressure in a pressurized storage tank, comprising a pressure-stabilized gas storage tank and a pressure-stabilizing medium charging and discharging system in communication with the pressure-stabilized gas storage tank;

• wherein the pressure-stabilized gas storage tank comprises a pressure-bearing shell capable of bearing a pressure of stored gas, an elastic liner arranged in the pressure-bearing shell, and a support device for the elastic liner;
• a volume of the elastic liner is changeable with charging and discharging of the pressure-stabilizing medium, thereby changing a volume of the stored gas to keep the pressure of the storage tank constant;
• a stored gas space in the pressure-stabilized gas storage tank is in the elastic liner or between the elastic liner and the pressure-bearing shell;
• when the pressure-stabilizing medium is a liquid medium, the liquid medium is any one of water, antifreeze, or hydraulic oil;
• the pressure-stabilizing medium charging and discharging system adjusts a volume of the pressure-stabilized gas storage tank by charging through pressurizing with a pump or by automatic discharging;
• the pressure-stabilizing medium charging and discharging system specifically comprises a pressurizing pump, a low-pressure liquid storage tank, an energy recovery unit, a generator, and connecting tubes;
• the generator is connected to the energy recovery unit;
• a pressure-stabilizing medium inlet of the energy recovery unit is in communication with an inlet and outlet port of a pressure-stabilizing medium storage space in the pressure-stabilized gas storage tank through a liquid discharge valve, a pressure-stabilizing medium outlet of the energy recovery unit is connected to an inlet of the low-pressure liquid storage tank, an outlet of the low-pressure liquid storage tank is connected to the pressurizing pump, and the pressurizing pump is connected to the inlet and outlet port of the pressure-stabilizing medium storage space in the pressure-stabilized gas storage tank through a liquid charge valve;
• a pressure-differential pressure transmitter interlocked with the liquid discharge valve and the liquid charge valve is arranged between the elastic liner and the pressure-bearing shell;
• and a position switch interlocked with the liquid charge valve is arranged outside the elastic liner.