Radioactive wastewater treatment method and system

Abstract

The invention relates to a radioactive wastewater treatment method, which comprises a liquid storage tank and a plurality of decay tank groups. Each decay tank group comprises a plurality of decay tanks which have height difference and are longitudinally arranged, the first-stage decay tank is connected to the liquid storage tank, and the last-stage decay tank is connected to a reflux tank. The system has the advantages that the reflux tank is connected to the rear portion of the last-stage decay tank, after the radioactive wastewater is decayed through the last-stage decay tank, if the radioactive concentration is larger than the emission standard value, the radioactive wastewater is discharged into the reflux tank and then flows back into the liquid storage tank together, on one hand, a driving device for radioactive wastewater reflux does not need to be arranged in each last-stage decay tank, on the other hand, the radioactive wastewater flows back to the liquid storage tank instead of the previous-stage decay tank, so that the influence on the radioactive concentration of the radioactive wastewater in the previous-stage decay tank is reduced, the decay period is convenient to estimate, and the radioactive concentration of the radioactive wastewater does not need to be monitored in real time.

Description

technical field [0001] The present application relates to the field of radioactive wastewater treatment, in particular to a method and system for radioactive wastewater treatment. Background technique [0002] Nuclear medicine departments of medical institutions widely use isotopes for imaging diagnosis and treatment, but the excrement produced by patients after taking and injecting radioactive isotopes during the diagnosis and treatment process contains radioactive waste water. pollute. [0003] In related technologies, the treatment of radioactive wastewater generally uses a three-stage decay pool to decay the waste water. After the waste water decays from the first-stage decay pool, it enters the second-stage decay pool, and after the second-stage decay pool decays, it enters the third-stage decay pool. Discharge after pool decay. [0004] In view of the above-mentioned related technologies, the inventor believes that in the process of radioactive wastewater treatment, ...

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Problems solved by technology

[0004] In view of the related technologies mentioned above, the inventor believes that in the process of radioactive wastewater treatment, the decay cycle is generally estimated according to the half-life of radioactivity. After multi-stage decay, Then detect the radioactive concentration of the radioactive wastewater. If the concentration is higher than the discharge standard value, it needs to be discharged into the previous decay pool for further decay. On the one hand, for the third-level decay pool, if the second-level decay pool If the decay time is greater than the decay time of the final decay pool, the final decay pool will be idle after the decay of radioactive waste water in the final decay pool; if the decay time of the second decay pool is shorter than the decay time of the final decay pool, the second After the decay of the second-stage decay pool, the radioactive wastewater in the second-stage decay pool has no place to discharge because the decay in the last-stage decay pool has not ended, resulting in a decrease in the efficiency of wastewater treatment

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