Cylinder structure of synthetic furnace

The utility model discloses a barrel structure of a synthetic furnace, and relates to the technical field of synthetic furnaces. The synthetic furnace barrel structure comprises an outer barrel, a graphite barrel and a heat exchange block, the graphite barrel is sleeved with the outer barrel, and the heat exchange block is assembled at the upper end of the graphite barrel; and baffle plates are fixed on the inner side wall of the outer cylinder body where the heat exchange blocks are located. The baffle plates are arranged on the side wall, opposite to the heat exchange blocks, of the outer barrel, hot water flows through the baffle plates from flat flow to turbulent flow, the flow speed is reduced, the residence time of the hot water is prolonged, and therefore the heat exchange effect is enhanced; and the medium changing the flowing direction has a washing and cleaning effect on impurities in the horizontal flow channel of the heat exchange block, so that the horizontal flow channel is effectively prevented