NOVELTY - A recycling device comprises a smoke recycling device, a smoke filtering device, an adjustable smoke pressurizing and conveying device, and a smoke converting device. The smoke recycling device comprises a hermetic cellar body (1) connected with one end of a pipe (2). The other end of the pipe is connected with one end of a centrifugal fan (3). The other end of centrifugal fan is connected with a case (5) through a pipe (4). The centrifugal fan is connected with a frequency converter (6). The smoke pressurizing and conveying device comprises a hermetic case connected with a gas inlet pipe.    USE - Device used for recycling exhaust gas produced from burning biomass (claimed) to obtain combustible gas including methane or ethylene.    ADVANTAGE - The device is simple to operate, has low electricity consumption and safe operation. The smoke pressurizing and conveying device can replace use of foul gas compressor.    DETAILED DESCRIPTION - A recycling device comprises a smoke recycling device, a smoke filtering device, an adjustable smoke pressurizing and conveying device, and a smoke converting device. The smoke recycling device comprises a hermetic cellar body (1) connected with one end of a pipe (2). The other end of the pipe is connected with one end of a centrifugal fan (3). The other end of the centrifugal fan is connected with a case (5) through a pipe (4). The centrifugal fan is connected with a frequency converter (6). The smoke filtering device comprises a hermetic case internally provided with a pipe, where pipe has bottom end provided with mini-pores and inlet and outlet respectively extending outside the case. The bottom of the case has a liquid outlet controlled by a valve. The adjustable smoke pressurizing and conveying device comprises a hermetic case connected with a gas inlet pipe. The gas inlet pipe has an automatic adjusting valve having one end connected with a valve adjusting connecting rod. The other end of the valve adjusting connecting rod is connected with a lifting board which is connected with an internal rebounding device. The internal rebounding device is arranged in the case. A smoke output pipe is connected with the case. The smoke converting device comprises a hermetic case connected with a smoke inlet pipe, an air inlet pipe and a smoke output pipe.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the smoke recycling device.    Hermetic cellar body (1)    Pipe (2, 4)    Centrifugal fan (3)    Case (5)    Frequency converter (6)