Waste water iron-carbon reduction treatment method and device with iron sludge cyclic utilization function

The invention relates to a waste water iron-carbon reduction treatment method and device with an iron sludge cyclic utilization function. The method includes the steps that industrial waste water is treated through an iron-carbon reduction reactor; iron-containing sludge obtained after treatment is added into a wet type thermocatalytic reaction kettle, activated carbon powder is added, the reaction kettle is closed and heated to 200-250 DEG C, the mixture is stirred to react for 5-6 h to obtain a solid-liquid mixture containing FeO and C, the mixture is discharged, put into a water inlet of the iron-carbon reduction reactor, and mixed with the waste water and acid and enters the reactor to conduct an iron-carbon reduction reaction, and sludge generated by the reaction is used circularly. By means of the method and the device, zero emission of sludge of the iron-carbon reduction technology is achieved, iron in iron-carbon reduction can be used circularly, and the method has great advantage of saving chemical c