Device and method for treating waste water containing heavy metals and radioactive uranium elements

Abstract

The invention relates to the technical field of environmental protection, and in particular relates to a device and a method for treating waste water containing heavy metals and radioactive uranium elements. The device comprises a resin adsorption unit, a diffusive dialysis membrane expansion separation unit, an acid concentration evaporation unit, an alkaline reaction precipitation evaporation crystallization unit, a tail gas absorption treatment unit and other process flows. The device can completely remove and separate radioactive acidic water containing salts and heavy metals to meet the requirements of safety and environmental protection, resources are recovered, and removal efficiency of radioactive uranium elements is high. The full automation of the resin adsorption automatic loading and unloading process ensures the safety of personnel. By concentrating, evaporating, recycling and reusing of nitric acid, the resources are saved. Liquid-solid packaging treatment is performed onbasic reaction precipitation evaporation crystallization salts of the heavy metals, the requirement of tail gas emission is ensured by absorbing and re-discharging evaporation crystallization tail gas, and the device has the advantages of simple process, safety, environmental protection and resource conservation.

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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