Gas adsorption tower for producing food-grade carbon dioxide

The utility model discloses a gas adsorption tower for producing food-grade carbon dioxide. The device comprises a main tower and an auxiliary tower, a gas inlet pipe is communicated with the main tower and the auxiliary tower, the end, installed in the main tower, of the gas inlet pipe is connected with a gas distribution device, multiple activated carbon layers are horizontally installed in themain tower, multiple gas channels are formed in the activated carbon layers, a supercharging device is installed among the multiple activated carbon layers, and the gas distribution device is installed at the bottom of the supercharging device; a sulfide detector is mounted on the inner wall of the main tower close to the gas outlet pipe; the air outlet pipe is connected with a purified air pipe and a backflow air pipe through a three-way electromagnetic valve; a controller is further installed on the main tower, an auxiliary air pipe is installed at the bottom of the auxiliary tower, a booster air pump is installed i