Device for loading and unloading catalyst of fixed bed reactor

The utility model discloses a catalyst loading and unloading device for a fixed bed reactor, which comprises the fixed bed reactor and a catalyst feeding tank, a seal head is mounted at the top of the catalyst feeding tank, a gas circuit pipeline is mounted at the upper part of one side of the catalyst feeding tank, a discharge pipe is mounted at the bottom of the catalyst feeding tank, and a discharge valve is mounted on the discharge pipe. A pressure release valve is mounted on the gas path pipeline, a gas path branch pipe communicated with the discharge pipe is communicated with the gas path pipeline between the pressure release valve and the catalyst feeding pipe, a pressurizing valve and a purging valve are sequentially mounted on the gas path branch pipe, and an inert gas pipe is communicated with the gas path branch pipe between the pressurizing valve and the purging valve; one side of the fixed bed reactor is connected with a conveying pipe communicated with the discharging pipe, the top of the fixed