Chemical dedusting ventilator

The utility model discloses a chemical dedusting ventilator which comprises a box body, a first conveying pipe, a second conveying pipe, an exhaust fan and a controller, the exhaust fan is arranged at the top end of the box body, the controller is arranged at the right end of the front end of the box body, sealing plates are arranged at the positions, above and below the controller, of the right end of the box body, and handles are arranged at the right ends of the two sealing plates. A first conveying pipe is arranged at the front end of the box body, a second conveying pipe is arranged at the rear end of the box body, and a dust removal bin is arranged in the box body. Through cooperation of the first conveying pipe, the box body, the second conveying pipe, the dust removal bin, a sealing plate, a discharging opening and a carbon bag, dust removal, filtering and conveying can be stably and rapidly conducted on petroleum; and through a separable structure between the first conveying pipe and the box body and