Nuclide-containing heavy metal high-concentration acid separation system and separation method

Abstract

The invention provides a nuclide-containing heavy metal high-concentration acid separation system and separation method, wherein a dialysis chamber I (21)and a diffusion chamber I (22)are formed by arranging membrane separation plates (1)and cation exchange membranes I (2)at intervals, wherein a dialysis chamber II (23)and a diffusion chamber II (24)are formed by arranging the membrane partition plates (1)and anion exchange membranes (3)at intervals, and a liquid outlet II' of the diffusion chamber I (22) is connected to a liquid inlet III of the dialysis chamber II (23), so that treatment onraw acid (high-concentration acid of nuclide-containing heavy metals)is realized; according to the separation system and the separation method provided by the invention, acid and the nuclide-containing heavy metals can be efficiently separated, a large amount of raw water (nuclide-containing heavy metal low-acid wastewater)can be utilized to realize pollution control by pollution, and secondary pollution is avoided; moreover, the separation system provided by the invention can realize automatic membrane loading and unloading, so that operators are prevented from being in direct contact with radioactive wastewater, and radioactive hazards are avoided.

Description

technical field [0001] The invention relates to a treatment method and equipment for radioactive waste water, in particular to a high-concentration acid separation system and separation method containing nuclide heavy metals. Background technique [0002] High-concentration acid heavy metal radiation wastewater refers to the acid content of 1 to 7mol / L, the heavy metal content of 0.1 to 100g / L, and the radioactive level higher than 3.7×10 2 Bq / L radioactive waste water from the nuclear industry is a relatively difficult waste water, which has become a technical bottleneck restricting the development of rare earth metallurgy and nuclear industry. [0003] The traditional treatment methods include neutralization, ion exchange, evaporation and other methods. These treatment methods require the addition of a large amount of chemical agents or inorganic adsorbents, ion exchange resins, cleaning and descaling agents, etc. On the one hand, a large amount of acid resources are waste...

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Problems solved by technology

This is a combined treatment method of reverse osmosis and continuous electric desalination. The above-mentioned invention only mentions the process of desalination, and does not mention whether the method can be used to deal with the separation of high-concentration acid and salt

[0007] However, when traditional anion exchange membrane diffusion dialysis is used to separate acid-containing heavy metal salts, the separation efficiency of acid and salt is low, and the penetration rate of salt is relatively high, so acid and salt cannot be separated well.

[0008] In addition, because radioactive waste water has radioactive hazards, especially high-radioactive waste water in nuclear waste water, how to realize automatic loading, unloading and replacement of membrane stacks in the field of radioactive waste water treatment, as well as automatic membrane change without changing Membrane partitions keep operators away from the hazards of radioactive waste water, which is a matter of great concern to researchers;

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