High-total-nitrogen wastewater pretreatment equipment

A high total nitrogen wastewater pretreatment device is characterized in that a tower body is composed of a shell and a pool body, a raw water liquid collecting layer, an air layer, a raw water filler layer, a raw water spraying layer, an acid liquid collecting layer, an acid filler layer, an acid spraying layer and a demisting layer which are sequentially arranged in the shell from bottom to top, the pool body comprises a raw water pool and an acid liquid pool, a first M-shaped filler plate is arranged in the raw water liquid collecting layer, and a second M-shaped filler plate is arranged in the acid liquid pool; the air layer is communicated with a fan, the fan is communicated with a discharge chimney, the raw water filler layer and the acid filler layer are filled with polyhedral hollow sphere filler, a spraying device is arranged in the raw water spraying layer, a second M-shaped filler plate is arranged in the acid liquid collecting layer, a water outlet at the lower part of the second M-shaped filler p