Treatment process of flue gas desulfurization wastewater for resource utilization of copper-containing waste

Abstract

The invention belongs to the technical field of waste water treatment, and in particular relates to a treatment process for copper-containing waste recycling and utilization of flue gas desulfurization waste water. Combined process; the wastewater generated by the vacuum belt filter press undergoes preliminary precipitation, the supernatant enters the primary coagulation tank, and PAC is added for coagulation and precipitation to treat calcium fluoride. The precipitated calcium fluoride enters the sludge tank, containing carbonic acid. The calcium-precipitated slurry is reused for flue gas scrubbing and desulfurization, and the supernatant is added to the secondary coagulation tank. At the same time, sodium carbonate is added to remove the hardness in the wastewater to prevent subsequent scaling of the MVR crystallizer; adding H 2 SO 4 After adjusting the pH, it enters the intermediate pool A, and then enters the MVR for evaporation, and the crystalline brine mixture discharged from the MVR is separated by a centrifuge; the process of the invention has low operation and maintenance costs, reduces the treatment cost of desulfurization wastewater, and treats the desulfurization wastewater to the reuse standard for reuse. , so as to achieve zero discharge of production wastewater.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to a treatment process for copper-containing waste resource utilization of flue gas desulfurization waste water. Background technique [0002] 1. Current situation, level and development trend at home and abroad [0003] Water reuse in production wastewater is to process industrial wastewater through advanced technical treatment to remove various impurities, toxic and harmful substances and certain heavy metal ions that pollute the water body. The water body is colorless, odorless, and the water quality is clear and transparent, reaching or better than The relevant water use standards stipulated by the state are reused in the production of enterprises. [0004] Zero discharge of waste water is the top mode of reclaimed water reuse. Strict discharge standards and restrictions have made the acceptance of zero discharge in various places higher and higher. S...

AI Technical Summary

Problems solved by technology

The existing sewage treatment system is too simple to completely remove the pollution factors in the wastewater, so that the treated water cannot meet the reuse standard, resulting in more and more production wastewater, thereby reducing work efficiency. Through the research and development of the wastewater treatment system , on the basis of the original sewage treatment system, new technologies and new equipment are added to improve the efficiency of sewage treatment and provide a strong guarantee for production

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