The invention discloses a low-temperature
flare gas heat exchange device based on a U-shaped heat exchange tube and a method thereof, and belongs to the technical field of cryogenic equipment. The heat exchange device provided by the invention comprises a
barrel body, a sealing head, a tube pass tube box, a tube pass tube plate, a heat exchange tube, a steam tube and a
steam injection tube, wherein the heat exchange tube is a U-shaped heat exchange tube. The upper part of the cylinder is provided with a steam
pipe through hole and a pressure balancing vent hole, and the bottom of the cylinder is provided with a water
injection port and a drain outlet. And a heat exchange tube is arranged in an inner cavity of the cylinder body and is communicated with the tube pass tube box through a tube pass tube plate. The lower end and the upper end of the tube pass tube box are respectively connected with the air inlet
pipe and the air outlet
pipe; the ends, away from the tube pass tube plate, of the heat exchange tubes are provided with anti-short-
circuit partition plates. A liquid level control interface is arranged on the side surface of the
barrel. The heat exchange device provided by the invention is compact in design, space is saved, the use of materials is reduced, the manufacturing process is simplified, the
heat transfer efficiency is improved, the performance is improved, the heat exchange device has remarkable economical efficiency and high performance advantages, and the manufacturing cost is reduced.