Low-resistance fixed bed reactor device

The utility model relates to the technical field of flue gas and waste gas treatment, in particular to a low-resistance fixed bed reactor device which comprises a supporting seat, the upper surface of the supporting seat is fixedly connected with a reactor body, the right side surface of the reactor body is fixedly connected with a flue gas outlet, and the bottom of the reactor body is fixedly connected with a rotary discharge valve. An internal pipeline is arranged in the reactor body, a mounting door is mounted on the upper surface of the reactor body, and a flue gas inlet is formed in the surface of the reactor body. Original flue gas enters the reactor body from the flue gas inlet, is uniformly distributed through the circular flow equalizing plate, is purified after passing through a catalyst and is discharged from the flue gas outlet, and when the catalyst needs to be replaced, only the mounting door needs to be opened, the rotary discharge valve needs to be started, and the rotary discharge valve is st