Electric heater for solid oxide electrolytic cell hydrogen production system

The utility model provides an electric heater for a hydrogen production system of a solid oxide electrolytic tank. The electric heater comprises an electric heater shell and a flange heating rod which is hermetically connected with the electric heater shell, the electric heater shell comprises a cylindrical cavity with one open end and one closed end, and an air inlet pipe and an air outlet pipe which are arranged on the side wall of the electric heater shell and are communicated with the cylindrical cavity; the flange heating rod comprises an end cover flange and an electric heating rod, and the end cover flange is located at the opening end of the cylindrical cavity and is in sealed connection with the electric heater shell; the electric heating rod extends in the axis direction of the cylindrical cavity, the heating end of the electric heating rod is located in the cylindrical cavity, the first wiring end of the electric heating rod is located on the side, away from the cylindrical cavity, of the end cover