Systems and methods for treating sterilization exhaust gas containing ethylene oxide

A method of treating ethylene oxide-containing sterilization exhaust gas, comprising:

• providing a reaction column comprising an inner cavity;
• providing a liquid substrate within the inner cavity of the reaction column, wherein the reaction column further includes a gas outlet pipe which includes a gas inlet disposed above a liquid level of the liquid substrate, and at least one gas distributor disposed below the liquid level of the liquid substrate;
• injecting ethylene oxide-containing sterilization exhaust gas into a gas inlet pipe;
• pressurizing, via a pressurizer, the ethylene oxide-containing sterilization exhaust gas in the gas inlet pipe;
• injecting the pressurized ethylene oxide-containing sterilization exhaust gas into the inner cavity, wherein the ethylene oxide-containing sterilization exhaust gas is brought into contact with the liquid substrate, and wherein injecting the pressurized ethylene oxide-containing sterilization exhaust gas into the inner cavity further comprises dispersing, via the at least one gas distributor, the ethylene oxide-containing sterilization exhaust gas in the inner cavity;
• discharging, via the gas outlet pipe, the ethylene oxide-containing sterilization exhaust gas that has passed through the liquid substrate;
• and
• discharging the liquid substrate through a liquid outlet pipe of the reaction column, when treatment capacity of the liquid substrate for the ethylene oxide-containing sterilization exhaust gas is reduced to a threshold level of catalyzing effectiveness;
• wherein the at least one gas distributor comprises a first gas distributor, the first gas distributor being a curved plate, wherein the curved plate includes a plurality of first air holes disposed in an annular arrangement, and the gas inlet pipe is in pneumatic communication with the gas outlet pipe through the plurality of first air holes, and wherein the size of air hole of the plurality of first air holes gradually increases moving in a direction from the center to the edge of the curved plate, wherein the at least one gas distributor further comprises a second gas distributor, wherein the second gas distributor is a flat plate with an edge connected to a side wall of the inner cavity and located above the curved plate, wherein the flat plate further comprises a plurality of second air holes disposed in an annular arrangement, wherein second air holes have a uniform hole pitch from the center to an intermediate region between the center and the edge of the flat plate, while second air holes gradually increase in hole pitch moving in a direction from the intermediate region to the edge of the flat plate.