Regenerated sealing oil composition and gas holder using same

The invention relates to the technical field of chemical engineering, particularly to a regenerated sealing oil composition. The regenerated sealing oil composition comprises, by weight, 3 to 5% of a demulsifying agent, 5 to 10% of a pour-point depressant, 5 to 12% of an anti-rust agent and 73 to 87% of naphthenic base oil. The invention further provides a gas holder using the regenerated sealing oil composition. The gas holder comprises an oil-water separator, an oil pump, an overflow fuel tank, a gas holder body, a piston oil groove and an oil gallery, wherein the oil-water separator is communicated with the oil gallery through a communicating pipe and connected with the overflow fuel tank through the oil pump, the regenerated sealing oil composition is filled in the oil-water separator, the piston oil groove is arranged in the gas holder body, and the oil gallery is arranged at the bottom of the gas holder body. The regenerated sealing oil composition can improve viscosity, oil-water separability, anti-rust performance and low temperature fluidity of sealing oil. A heating unit is arranged at the bottom of the thin oil sealed gas holder so as to overcome the problem of nonuniform oil temperature at the oil gallery located at the bottom of the gas holder.