NOVELTY - High temperature methanation device comprises a methane reactor for synthesis of methane and a heat exchanger for performing heat exchange of the exhaust gases discharged from the methane reactor. The methanation reactor comprises a catalyst layer and a gas collector located at the bottom of the catalyst layer. The outlet of the gas collector is connected to the gas channel inlet of the heat exchanger via a guide tube. The methane reactor and the heat exchanger are arranged within a pressure container shell. The guide tube is provided with a cooling device.    USE - Used as a high temperature methanation device.    ADVANTAGE - The device solves the problem of steam production and difficulties in selecting steam super-heater.    DETAILED DESCRIPTION - High temperature methanation device comprises a methane reactor for synthesis of methane and a heat exchanger for performing heat exchange of the exhaust gases discharged from the methane reactor. The methanation reactor comprises a catalyst layer and a gas collector located at the bottom of the catalyst layer. The outlet of the gas collector is connected to the gas channel inlet of the heat exchanger via a guide tube. The methane reactor and the heat exchanger are arranged within a pressure container shell. The guide tube is provided with a cooling device. The gas channels of each heat exchanger are connected in series via expansion joints of the cooling device. The cooling medium channels of each section of the heat exchanger are connected to both the ends of an upper collection tank and a lower collection tank. The upper collection tank is externally connected via multiple discharge pipelines. Each of the lower collection tanks are respectively connected to an external device and multiple inlet pipelines. The discharge and the inlet pipelines correspondingly pass through the side wall of the shell coiled heat exchanger. Each outlet of the discharge pipelines and each inlet of the inlet pipelines are externally exposed to the outer part of the shell. The discharge pipelines and the inlet pipelines of the corresponding sections of the heat exchanger is located between the side wall of the shell and hence is suspended within the shell body. A spaced gap is located between each section of the heat exchanger and the side wall of the shell. The gas outlet of the heat exchanger is connected to the outlet of the shell.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the high temperature methanation device.