Heat exchanger and heating furnace

The heat exchanger comprises a shell and a heat conduction pipe, the shell is provided with a supporting plate, the heat conduction pipe is installed on the supporting plate, the heat conduction pipe comprises a heat absorption section and a heat release section, the heat absorption section and the heat release section are located on the two sides of the supporting plate respectively, the heat absorption section is fixedly connected with a first fin, and the heat release section is fixedly connected with a second fin. The first fins spirally surround the outer wall of the heat absorption section, the heat absorption section is located in the shell, and the shell is provided with an air inlet pipe and an exhaust pipe. The utility model further discloses a heating furnace which comprises a furnace body and the heat exchanger. The flue gas heating furnace has the beneficial effects that the flue gas can be used for heating the heating furnace, so that the effect of recovering heat can be achieved, the energy uti