Automatic loading and unloading system and method for pneumatic transmission of radioactive resin

Abstract

The invention discloses an automatic loading and unloading system for pneumatic transmission of radioactive resin and relates to the field of radioactive resin loading and unloading. The system comprises a resin bed, a waste resin transfer tank, a technical liquid supply system and a resin supply system. The top of the resin bed is provided with a resin inlet and a technical liquid inlet. The bottom of the resin bed is provided with a waste resin outlet and a technical liquid outlet. The loading and unloading system further comprises a compressed air supply system. The resin bed is further provided with a waste gas outlet. The compressed air supply system communicates with the resin inlet and the technical liquid outlet through two compressed air pipelines separately. The compressed air pipeline communicating with the resin inlet is provided with a first compressed air isolation valve. The compressed air pipeline communicating with the technical liquid outlet is provided with a secondcompressed air isolation valve. The automatic loading and unloading system for pneumatic transmission of the radioactive resin can rapidly and effectively unload the radioactive resin.

Description

technical field [0001] The invention relates to the field of radioactive resin loading and unloading, in particular to an automatic loading and unloading system and method for pneumatically conveying radioactive resin. Background technique [0002] At present, the transportation and loading and unloading of ion exchange resins in nuclear power plants generally adopt the method of hydraulic flushing, which consumes a lot of water and produces more radioactive wastewater. If the water is recycled, a circulation pump must be equipped, resulting in excessive investment in equipment and contamination of the circulation pump by pollutants in the radioactive resin, introducing new radioactive pollutants. In the invention patent "A Nuclear Power Plant Resin Transfer Equipment" (application number: CN201310198915.3), a vacuum device is used to generate negative pressure to suck the resin to reduce the contamination of resin transfer. However, it needs to be equipped with a vacuum de...

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Problems solved by technology

However, it needs to be equipped with a vacuum device and a special transfer tank, and the negative pressure cannot play the role of mixing the resin, and the resin unloading rate is too low and too slow, so it cannot be applied to the field of radioactive resin tank loading and unloading at present.

Invention patent "Resin loading and unloading system using gas as the transmission medium for nuclear power plants" (application number: 201410081680.4) uses the method of gas from the top of the resin bed to the bottom to replace the resin, but due to the single flow direction of the gas and the phenomenon of partial flow, the discharge A large number of inverted cone-shaped particles remain around the mouth, and the incomplete discharge of the mixed bed will cause a series of adverse consequences such as poor purified water quality.

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