TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The inner wall of marsh gas tank is set with an insulating layer; the insulating layer material is polystyrene plastic. The biogas slurry reflowing device comprises a sludge pump, a return tube and nozzle, where the sludge pump and the discharging port is set on the marsh gas tank corresponding to the bottom part, and the spray head is multi-nozzle and is connected with the sludge pump through the return tube, and the nozzle is fixed on the track above uniform distance box at 20 cm. The heating pipeline is galvanized pipeline, the galvanized pipeline in marsh gas tank is set on the outer solar energy vacuum tube or a boiler connected with the inner gas tank set with a temperature sensor. The strain adhesive film is netty plastic fiber, the strain adhesive film height is higher than track box of 30 cm. The horizontal guide rail is set in marsh gas tank bottom part vertically set with one push plate between the guide rail with corresponding feeding port of one end at the bottom of fixed upper push one pushing force on the connecting shaft. The pushing force vehicle includes two rotating shafts and is fixed set with a marsh gas tank and the inner wall of the connecting spring up of the roller of two end rotating shaft. The rotating shaft, a fixed pulley is set with the guide rail of corresponding discharge hole at one end. The steel wire rope through fixed pulley is connected with marsh gas tank crane. The box lifting device comprises a gantry crane and grab, where the grab comprises a main beam, a first movable arm and a second movable lifting arm and a clamping plate, one end of first movable lifting arm and second movable lifting arm of main beam is hinged on the two end. The first movable lifting arm and second hanging arm is movably set with each one used for fixing steel wire rope of connecting plate. The steel wire rope is fixed on the main beam of a gantry crane and the fixed pulley and hoisting hook is connected with the first movable lifting arm and the other end of second movable lifting arm is connected with a clamping plate, and the width length with the marsh gas pool feeding port and material outlet of clamping plate. The first movable lifting middle part is fixedly connected with a first outer arm support plate, and the middle part of second fixing movable lifting arm is connected with a second outer support plate. The first support plate and the second support plate through the pin shaft is hinged with each other. The first movable lifting middle part is fixedly connected with a first outer arm support plate, and the middle part of second fixing movable lifting arm is connected with the second outer support plate. The first support plate and the second support plate through the pin shaft is hinged with each other.