Gas phase hydrogenation fixed bed reactor

The utility model discloses a gas phase hydrogenation fixed bed reactor, which belongs to the field of chemical machinery, and comprises a tank body, a first gas pipe and a second gas pipe are fixedly connected to the upper part of the tank body, an exhaust pipe is fixedly connected to the bottom of the tank body, and a filter screen for receiving a catalyst is fixedly connected in the tank body. The supporting rods are sleeved with springs, the top of the rectangular frame is fixedly connected with a knocking disc, and the knocking disc abuts against the lower surface of the filter screen intermittently. According to the utility model, the tooth-missing gear is arranged to drive the rectangular frame to move downwards, and the rectangular frame is bounced by the spring when the tooth-missing gear is not meshed with the teeth in the rectangular frame, so that the knocking disc at the top of the rectangular frame impacts the filter screen to vibrate the filter screen, and a catalyst on the filter screen can be