Environment-friendly nuclear wastewater treatment system

Abstract

The invention discloses an environment-friendly nuclear wastewater treatment system, and belongs to the technical field of nuclear waste treatment. The system comprises an evaporation tank and a heating system used for heating the evaporation tank; the evaporation tank is provided with a wastewater injection port, a concentrated solution discharge port and a secondary steam discharge port; waste water injected into the evaporation tank body is heated by the heating system and then is discharged from the secondary steam outlet and the concentrated solution outlet, the secondary steam outlet is positioned at the top of the evaporation tank body, and an entrainment removing device is arranged at the upper part of the evaporation tank body; the entrainment removing device comprises a plurality of cylindrical defoaming units which are connected in an array mode, each cylindrical defoaming unit comprises a vertically-communicated cylinder, and an inlet of each cylinder is smaller than an outlet, so that the middle of each cylinder is in a bundling shape. The system disclosed by the invention can effectively remove entrainment in secondary steam, reduce residues of radioactive elements in wastewater and improve the decontamination efficiency.

Description

technical field [0001] The invention belongs to the technical field of nuclear waste treatment, and in particular relates to an environment-friendly nuclear waste water treatment system. Background technique [0002] Radioactive wastewater is divided into high, medium, low and weak radioactive wastewater according to the level of radioactivity. The sources of wastewater include nuclear power plant wastewater, uranium ore dressing and smelting wastewater, spent fuel reprocessing wastewater, and wastewater generated by hospitals, scientific research and other units, uranium ore dressing and smelting The produced wastewater mainly contains nuclides including U, Ra and trace amounts of Po and Pb210, which belongs to low-radioactive wastewater. Nuclear power plant waste water mainly includes main equipment and auxiliary equipment evacuation water, reactor discharge water, second circuit waste water, cleaning waste liquid, ion exchange device regeneration waste water and special w...

AI Technical Summary

Problems solved by technology

The condensed water formed during the evaporation process is discharged or reused, and the concentrated liquid is further solidified. However, in existing devices, radionuclides are likely to exist in the mist, and with the steam overflowing, the efficiency of decontamination is affected.

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