Method for treating vanadium pentoxide wastewater and circularly utilizing resources

Abstract

The invention discloses a method for treating vanadium pentoxide wastewater and circularly utilizing resources, and relates to industrial wastewater treatment and cyclic utilization of resources. The method comprises the following steps of: adjusting pH in the vanadium pentoxide wastewater, adding a reducing agent and reducing to trivalent chromium; adding a precipitator into the vanadium pentoxide wastewater, and separating to sludge and supernate after reaction; filtering the supernate, adsorbing the wastewater obtained by filtration to obtain purified wastewater, pumping the purified wastewater into a low pressure reverse osmosis system, and desalting to obtain dialyzate 1 and concentrated liquid 1; pumping the concentrated liquid 1 into a high pressure reverse osmosis system to carry out high pressure reverse osmosis desalting to obtain dialyzate 2 and concentrated liquid 2, combining the dialyzate 2 and the dialyzate 1 to obtain regenerating water as water for vanadium leaching in a leaching station in production, and causing the concentrated liquid to enter an electroosmosis system; feeding the concentrated liquid 2 into the electroosmosis system through a water pump and concentrating the concentrated liquid 2, causing the generated dialyzate 3 to enter the high pressure reverse osmosis system, and continuously and circularly treating, and discharging the concentrated liquid 3 into a salting ball forming station salt water pool in production of the vanadium pentoxide as salt water.

Description

technical field [0001] The invention relates to industrial wastewater treatment and resource recycling, in particular to a wastewater treatment and resource recycling method for producing vanadium pentoxide by a low-sodium roasting-water leaching vanadium extraction method combined with reverse osmosis technology and electrodialysis technology. Background technique [0002] Alum pentoxide (V 2 o 5 ) has a wide range of uses, can be used to manufacture vanadium-iron alloy steel, decarburization, desulfurization and catalyst in the synthetic ammonia industry, is a coloring material for printing and dyeing, ceramics, corrosion inhibitors for equipment anti-corrosion in petrochemical installations, and is also a raw material for the preparation of vanadium compounds . The traditional process for producing vanadium pentoxide is: [0003] Mining → mineral processing → crushing, crushing → mixing → ball making → roasting → water leaching → sedimentation → ion exchange → precipit...

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a kind of treatment and recycling recycling method of vanadium pentoxide production wastewater for the existing vanadium pentoxide wastewater with complex components, difficult treatment, difficult discharge up to the standard, and difficult recycling. The present invention not only Fundamentally solve the pollution problem of vanadium pentoxide wastewater, and through the regeneration and resource utilization of wastewater, tap water consumption can be saved, water consumption per unit of product can be reduced, and the production of vanadium pentoxide can be reduced by recycling high-concentration sodium salt wastewater Consumption of raw material sodium chloride, and ultimately zero discharge of wastewater pollutants