Cold-rolled stainless steel wastewater total nitrogen treatment device

The cold-rolled stainless steel wastewater total nitrogen treatment device comprises a sand-water separator, an anoxic bin, a denitrification bin and an SBR reaction bin, the side wall of the sand-water separator is communicated with the bin wall on one side of the anoxic bin through a pipeline, the bin wall on the other side of the anoxic tank is connected with the denitrification bin, the upperpart of the anoxic tank is communicated with the upper part of the denitrification bin, and the bin wall on the other side of the denitrification bin is communicated with the SBR reaction bin througha pipeline; a centrifugal separation barrel is arranged in the sand-water separator, a water inlet pipeline is arranged on the upper portion of the sand-water separator and communicated with the upperportion of the centrifugal separation barrel, a slag discharging pipeline is arranged at the bottom of the sand-water separator and communicated with the lower portion of the centrifugal separation barrel, and the slag dischar