NOVELTY - Residual heat drying sludge plant for landfill biogas power generation comprises a generator unit, a stirring and drying chamber (2), a conveying drying chamber (7), a motor (1), a hollow stirrer (4) and a sludge conveying unit (8). The conveying drying chamber is connected with the lower part of the stirring and drying chamber and its outlet connected to the conveying drying chamber. The sludge conveying unit comprising an upper conveying belt and a lower conveying belt is arranged within the conveying drying chamber. A hollow stirrer comprises a hollow shaft and a hollow propeller.    USE - Used as a residual heat drying sludge plant for landfill biogas power generation.    ADVANTAGE - The device: has a simple structure with high waste heat recovery rate; has good sludge drying effect; and is capable of continuous operation.    DETAILED DESCRIPTION - Residual heat drying sludge plant for landfill biogas power generation comprises a generator unit, a stirring and drying chamber (2), a conveying drying chamber (7), a motor (1), a hollow stirrer (4) and a sludge conveying unit (8). The conveying drying chamber is connected with the lower part of the stirring and drying chamber and its outlet connected to the conveying drying chamber. The sludge conveying unit comprising an upper conveying belt and a lower conveying belt is arranged within the conveying drying chamber. The upper conveying belt is located between the outlet of the stirring and drying chamber and the conveying drying chamber outlet. The lower conveyor belt is located between the bottom of the stirring and drying chamber outlet and above the conveying drying chamber outlet. A hollow stirrer comprises a hollow shaft and a hollow propeller that runs throughout the stirring and drying chamber. The hollow shaft is provided with a spiral groove. The hollow propeller blade corresponds to a fixed connection to the spiral groove. One end of the hollow stirrer is connected with the motor through shaft coupling and the other end is provided with a frame. The stirring and drying chamber inner wall is provided with a hollow propeller blade matched with a spindle. The outer wall of the spindle and the stirring and drying chamber are uniformly distributed with vacuum heat pipes. The upper and the lower conveying belt are internally provided with uniformly distributed vacuum heat pipes, a condensing coil outlet pipe of the generator unit, a flue gas export and a wastewater pipe, respectively through the valve and pipe connected to the hollow stirrer import. The hollow stirrer export is respectively connected with a condensate drain valve, flue gas exhaust valve and a wastewater drain valve. A gas outlet is provided at the upper part of the stirring and drying chamber and at the sidewall of the conveying drying chamber, where the gas outlets are connected to an exhaust fan inlet through a pipeline. The gas outlet pipe of the exhaust fan is connected to a condenser and its liquid outlet is connected to the condensate collection container. The gas outlet of the condenser is connected with the gas purification device.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic representation of the residual heat drying sludge plant for landfill biogas power generation.    Motor (1)    Stirring and drying chamber (2)    Hollow stirrer (4)    Conveying drying chamber (7)    Sludge conveying unit (8)