Equipment and method for treating waste water produced by rare earth separation processing

Abstract

The invention discloses equipment and a method for treating waste water produced by rare earth separation processing. The treatment equipment comprises an oil separation tank; the oil separation tankis connected with an adjusting tank; the adjusting tank is connected with a first Fenton reaction tank through a first pump; the first Fenton reaction tank is connected with a second Fenton reaction tank; the second Fenton reaction tank is connected with a neutralization reaction tank; the neutralization reaction tank is connected with a coagulation reaction tank; the coagulation reaction tank isconnected with a liquid filter through a second pump; the liquid filter is respectively connected with a sludge tank and a middle water tank; the sludge tank is connected with a press filter througha fourth pump; the middle water tank is connected with an activated carbon filter through a third pump; the activated carbon filter is connected with a clean water tank; and a Roots fan is respectively connected with the adjusting tank, the second Fenton reaction tank, a neutralization reaction tank and the coagulation reaction tank separately. The treatment equipment and the treatment method havethe characteristics of small investment, good pollutant removing effect and operation stability and has the advantages of adaptability to a certain degree of load fluctuation and change, low treatment cost and the like.

Description

technical field [0001] The invention relates to wastewater treatment equipment, in particular to a rare earth separation processing wastewater treatment equipment and a treatment method thereof. Background technique [0002] In view of the current rare earth processing using extraction, oxalic acid precipitation and sodium bicarbonate precipitation processing technology, the existing wastewater treatment technology is mainly chemical precipitation method. The chemical precipitation method mainly uses "lime neutralization + precipitation" as the main process, uses lime to adjust the pH of wastewater to neutral, uses lime to react with heavy metal ions, and uses sedimentation tanks to separate heavy metals. With the promulgation and implementation of the "Discharge Standard of Rare Earth Industrial Pollutants" GB 26451-2011, the traditional "lime neutralization + precipitation" process for the treatment of rare earth wastewater has shortcomings such as COD and heavy metal ions...

AI Technical Summary

Problems solved by technology

With the promulgation and implementation of the "Discharge Standard of Rare Earth Industrial Pollutants" GB 26451-2011, the traditional "lime neutralization + precipitation" process for the treatment of rare earth wastewater has shortcomings such as COD and heavy metal ions that cannot be stably up to the standard, and there are many suspended solids in the effluent. The load is small, which cannot meet the requirements of the characteristics of large fluctuations in water quality of rare earth separation and processing wastewater by oxalic acid precipitation and sodium bicarbonate precipitation (hereinafter referred to as rare earth separation and processing wastewater)

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