Expressway tunnel emergency disposal device

The utility model discloses an expressway tunnel emergency disposal device which comprises a purification box, an induced draft fan is fixedly installed on the top of the front face of the purification box, a demisting chamber and a dust removal chamber are arranged in the purification box, a demisting silk screen is installed in the demisting chamber, a sliding groove is formed in the inner side wall of the demisting chamber, and a servo motor is installed on the inner bottom wall of the demisting chamber. A lead screw is coaxially installed at the output end of the servo motor through a coupler, a sliding block is installed on the surface of the lead screw in a sliding fit mode, and a transmission rod is installed on one side of the sliding block through a rotating shaft. According to the expressway tunnel emergency disposal device, through arrangement of the purification box, the demisting chamber, the servo motor, the lead screw, the sliding block, a transmission rod, a brush assembly, a collection bottle