Waste gas harmless treatment device in NMP (N-Methyl Pyrrolidone) waste water recycling treatment process

The utility model relates to the technical field of NMP waste water resourceful treatment, in particular to a waste gas harmless treatment device in the NMP waste water resourceful treatment process, which comprises an anaerobic reactor, the anaerobic reactor is connected with a spray tower, the spray tower is connected with a biofilter, a spray assembly and a gas distribution assembly are arranged in the spray tower, and the gas distribution assembly is connected with the biofilter. The gas distribution assembly is located at the bottom of the spray tower and is communicated with the top of the anaerobic reactor, the spray assembly is located at the upper part of the spray tower and comprises a hollow rotating shaft and a driving motor for driving the rotating shaft to rotate, a plurality of spray pipes are fixedly arranged on the rotating shaft and are distributed along the circumferential direction of the rotating shaft, and the spray pipes are communicated with the spray tower. A plurality of water sprayi