TECHNOLOGY FOCUS - CHEMICAL ENGINEERING - Preferred Parts: The feeding part comprises a reducer, an auger and a feeding pipe; the reducer is connected with the auger which is connected with the feeding pipe, and the feeding pipe is connected with the air stripping tank. The air stripping tank is a steel tank for storing medical residues and straw branch, where the air stripping tank is connected with the feeding pipe and is connected with the filtering system via a gas pipe; the upper part of the air stripping tank is provided with a safe discharging port and a gas outlet port; the lower part is provided with an oxygen inlet; the lower part of the air stripping tank is provided with a waste draining part which is composed of an auger, a discharging pipe and a reducer; the auger is installed on the lower part of the air stripping tank; the auger is connected with the discharging pipe which is connected with the reducer; the pipe walls of the air stripping tank, the discharging pipe and the oxygen inlet are connected hollow double layer structures. Filtering system is composed of several filtering tanks which are mutually connected; the upper part of the filtering tank is provided with a gas outlet and a cold air inlet; the lower part of the filtering tank is provided with a gas inlet and a hot air outlet; the lower part of the filtering tank is provided with a tar outlet; the inside of the filtering tank is provided with a columnar filtering sleeve and a plane filtering net; the columnar filtering sleeve is a filtering structure with columnar shaped filtering hole; the plane filtering net is a filtering structure with a filtering hole; the columnar filtering sleeve in the filtering tank and the plane filtering net are crossed to form a filtering system in the filtering tank; the filtering tank, the plane filtering net and the columnar filtering sleeve are hollow double layer structures which are mutually connected and are connected with the cold wind pipe on the outside of the filtering tank; and the cold wind pipe is connected with the wind machine. The air outlet part is composed of a vacuum sucking rod, an accident discharging port and a natural gas outer supply port, where the vacuum sucking rod is connected with the filtering tank to guide the gas; the gas is connected with the natural gas outer supply port via the pipe; the center of the pipe connected with the vacuum sucking rod and the natural gas outer supply port is connected with a pipe; the pipe is provided with an accident discharging port; and the gas pipe connected with the filtering tank is provided with an air inlet.