Monooxygen catalytic oxidation device

The utility model discloses a single oxygen catalytic oxidation device, which belongs to the technical field of wastewater treatment, and comprises an oxygen generator, an ozone generator, a plurality of gas-liquid mixers, a reaction tower and a delivery pump, each gas-liquid mixer comprises a gas interface, a liquid inlet and a gas-liquid outlet, and the ozone generator is connected with a shunt pipe. The flow dividing pipe is connected with the gas connector through a branch pipe, the gas-liquid outlet is connected with the reaction tower, and a first filler layer is arranged in the reaction tower and comprises first catalyst filler. According to the utility model, the plurality of gas-liquid mixers are arranged, so that the gas-liquid two-phase mixing uniformity can be improved, and the mixing efficiency is improved; a plurality of filler layers are arranged, and different catalysts are matched with ozone to greatly improve the ozone utilization rate; the heater is arranged below the filler layer, so that