Cooling and pressure stabilizing system of liquefied natural gas storage tank

The utility model discloses a cooling and pressure stabilizing system of a liquefied natural gas storage tank. Gas storage tank, an exhaust pipe is fixed on the upper surface of the air storage tank;the upper surface of the air storage tank is sleeved with a heat exchange cover. An exhaust pipe through groove is formed in the bottom of the heat exchange cover, the exhaust pipe penetrates throughthe exhaust pipe through groove and extends into the heat exchange cover, a heat exchange module and a condensation pipe are arranged in the heat exchange cover, and the condensation pipe penetrates through the heat exchange cover and the air storage tank and extends to the bottom of the air storage tank. According to the cooling and pressure stabilizing system of the liquefied natural gas storagetank, the heat exchange module is arranged in the liquefied natural gas storage tank to achieve the functions of heat preservation and pressure maintaining, and the cooling and pressure stabilizing system has the advantages of