NOVELTY - Marsh gas tank comprises a thermal insulation chamber (1), a water collecting tank (2), an electric heating tube (3), a methane tank main body (4), a solar energy heat collector and a controller. The top part of the thermal insulation chamber is set with a light transmissive window, and its inner wall is equipped with a heat storage layer for heat storage. The water collecting tank is set with a heat guide plate. The thermal conductive plate water collecting tank is divided into an inner box body and an outer box. The inner box body and outer box are equipped with the electric heating tube.    USE - Used as marsh gas tank.    ADVANTAGE - The marsh gas tank: has high raw material utilization rate (claimed); and can maintain stable temperature within the main body.    DETAILED DESCRIPTION - Marsh gas tank comprises a thermal insulation chamber (1), a water collecting tank (2), an electric heating tube (3), a methane tank main body (4), a solar energy heat collector and a controller. The top part of the thermal insulation chamber is set with a light transmissive window, and its inner wall is equipped with a heat storage layer for heat storage. The water collecting tank is set with a heat guide plate. The thermal conductive plate water collecting tank is divided into an inner box body and an outer box. The inner box body and the outer box are equipped with the electric heating tube. The electric heating tube is connected to an output end of the controller. The marsh gas tank main body is set in the thermal insulation chamber, and its inner wall is provided with insulating layer for thermal insulation. The marsh gas tank main body is also equipped with a temperature sensor (5) and a heating coil. The temperature sensor is connected to an input end of the controller. The solar energy heat collector is set above the thermal insulation chamber. The solar energy heat collector, a first pump and an inner box body are connected in series through a pipeline to form a first circulation loop. The inner box body, a second pump and the heating coil are connected in series to form a second circulation loop.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the Marsh gas tank.    Thermal insulation chamber (1)    Water collecting tank (2)    Electric heating tube (3)    Methane tank main body (4)    Temperature sensor (5)