Large double-cylinder three-stage gas-liquid separator for depleted oil reservoir type gas storage

A large double-cylinder three-stage gas-liquid separator for an exhausted oil reservoir type gas storage belongs to the technical field of large gas-liquid separators applied to exhausted oil reservoir type gas storage and comprises an upper cylinder and a lower cylinder, the upper cylinder is connected with the lower cylinder, the upper cylinder comprises an upper cylinder left cavity, an upper cylinder middle cavity and an upper cylinder right cavity, and the upper cylinder left cavity is sequentially connected with the upper cylinder middle cavity and the upper cylinder right cavity; the lower cylinder comprises a lower cylinder right cavity and a lower cylinder left cavity, and the lower cylinder right cavity is connected with the lower cylinder left cavity; an upper cylinder left cavity is arranged in the upper cylinder above the lower cylinder left cavity, a first-stage separation element is arranged in the upper cylinder left cavity, an upper cylinder middle cavity is arranged in the upper cylinder abo