Treatment system for removing total nitrogen in coking wastewater

The invention discloses a treatment system for removing total nitrogen in coking wastewater. The treatment system is used for carrying out ammonia distillation on the coking wastewater, removing oil by gravity, carrying out anoxic/aerobic first-stage biochemical treatment, carrying out anoxic/aerobic second-stage biochemical treatment, carrying out compound flocculation and sedimentation, and filtering to remove total nitrogen CODcr, cyanide, SS (Suspended Solid) and the like in the coking wastewater, so that output water meets the total nitrogen index requirements of direct emission of Emission Standard of Pollutants for Coking Chemical Industry (GB16171-2012). The treatment system disclosed by the invention has the advantages that a technological flow is simple, and the system has an anti-impact load, is simple to operate and stable to operate; the treatment system can be applied to up-to-standard emission treatment of coking wastewater of the joint steel enterprises and independentcoking enterprises at hom