Nuclear-purity grade uranyl nitrate solution concentration device

Abstract

The invention belongs to the field of uranium purification, in particular relates to concentration techniques for uranyl nitrate solutions, and discloses a nuclear-purity grade uranyl nitrate solution concentration device which comprises a supply unit, a first-stage nanofiltration unit, a second-stage nanofiltration unit and a reverse osmosis unit, wherein the supply unit comprises a stoste tank, a stoste pump and a feeding tank firstly; secondly, the first-stage nanofiltration unit comprises a first-stage nanofiltration pump, a first-stage nanofiltration membrane and a first-stage nanofiltration tank; thirdly, the second-stage nanofiltration unit comprises a second-stage nanofiltration pump, a second-stage nanofiltration membrane and a second-stage nanofiltration tank; fourthly, the reverse osmosis unit comprises a pressurizing pump, a high-pressure pump, a reverse osmosis membrane and a reverse osmosis tank. In a uranium purification production line, the device with the combination of the nanofiltration membrane and the high-pressure reverse osmosis membrane for concentrating the uranyl nitrate solution is practical and feasible. Compared with conventional evaporation concentration, the device is relatively simple to operate and maintain and relatively low in energy consumption in the concentration process. Therefore, the device has certain economic benefits in relieving working intensity, improving working efficiency and the like.

Description

technical field [0001] The invention belongs to the field of uranium purification, and in particular relates to the enrichment technology of uranyl nitrate solution. Background technique [0002] At present, the most widely used evaporation devices in the field of uranium purification include evaporation ponds, multi-effect evaporators, and electrodialysis. [0003] Evaporation pond is a traditional natural evaporation technology, which has the characteristics of low construction cost, stable operation, simple maintenance, long life and good impact load resistance. At present, this technology has been widely used in some large-scale chemical projects in China. The evaporation pond uses solar energy. Under sufficient sunlight, the thick liquid gradually evaporates, then crystallizes and is finally landfilled. Therefore, this technology has strict requirements on geographical location and climatic conditions. Studies have shown that only areas where the annual average evapo...

AI Technical Summary

Problems solved by technology

Electrodialysis technology is generally suitable for treating wastewater with a salt concentration of 500-4000mg / L. When the salt content of the water to be treated is low, the economic efficiency is poor.

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