Finned sleeve type heat pipe for recycling flue gas waste heat

The utility model relates to a finned sleeve type heat pipe for recycling flue gas waste heat, and belongs to the field of energy and thermal technology. The finned sleeve type heat pipe comprises an inner pipe, an outer pipe and a plurality of fins. The outer pipe is sleeved on the inner pipe, the two ends of the inner pipe extend out of the outer pipe, and a water inlet and a water outlet of the finned sleeve type heat pipe are formed in the lower end portion and the upper end portion of the inner pipe respectively. The outer pipe is welded and fixed with the inner pipe through a lower end cover and an upper end cover of the outer pipe, an extraction opening is formed in the upper end cover of the outer pipe, and liquid heat conduction working media are contained in the outer pipe. The fins are solid circular rings, and the fins are sleeved on the outer pipe in an equidistance mode. According to the finned sleeve type heat pipe, heat transfer is conducted through vapor and liquid phase change of the liquid