Device and method for treating wastewater containing heavy metals and radioactive uranium elements

Abstract

The invention relates to the technical field of environmental protection, in particular to a waste water treatment device and method containing heavy metals and radioactive uranium elements, including a resin adsorption unit, an expansion dialysis membrane separation unit, an acid concentration evaporation unit, and an alkaline reaction precipitation evaporation crystallization unit , tail gas absorption treatment unit and other technological processes, through the treatment of acidic water containing radiation protection, salt, and heavy metals, it can completely remove and separate, meet safety and environmental protection requirements, recover resources, and remove radiation-resistant uranium elements with high efficiency; through the treatment of The automatic loading and unloading process of resin adsorption is fully automated to ensure the safety of personnel; by concentrating, evaporating, recycling and reusing nitric acid, saving resources; by carrying out alkali reaction precipitation, evaporating and crystalline salt of heavy metals for liquid-solid packaging treatment; through Absorb and treat the evaporated and crystallized tail gas before discharging to meet the tail gas discharge requirements; it has the advantages of simple process, safety and environmental protection, and resource saving.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a waste water treatment device and method containing heavy metals and radioactive uranium elements. Background technique [0002] Uranium-containing radioactive acidic water is a kind of radioactive wastewater from a wide range of sources, such as uranium mining and preparation, uranium refining and nuclear fuel manufacturing wastewater, reactor operating wastewater, reactor fuel post-treatment wastewater, wastewater produced by radioactive isotopes, and use Wastewater from radioactive isotope factories and research departments, etc. In-situ leaching uranium mining is to inject the leaching solution prepared according to a certain formula into the natural ore-bearing aquifer through the liquid injection borehole, seepage along the ore layer under the action of the hydraulic gradient, and selectively select the uranium through convection and diffusion. Oxidize an...

AI Technical Summary

Problems solved by technology

The adsorption method is based on an adsorbent, which has high selectivity to radioactive elements, high cost, and cannot handle acid salts.

The evaporative concentration method concentrates metal impurities and salts at the same time. Part of the waste liquid is mixed with radioactivity, and the concentrated waste liquid must be pretreated. The treatment cost is high and the effect is poor.

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