Liquid metal working medium purification device

Abstract

The invention relates to a liquid metal working medium purification device which comprises a barrel, a purification wire mesh assembly, a crystallization wire mesh assembly and a cooling structure, wherein an inlet pipe and an outlet pipe are arranged on the barrel, and the purification wire mesh assembly and the crystallization wire mesh assembly are arranged in the barrel; the cooling structure is arranged outside the barrel and is used for cooling the crystallization wire mesh assembly; and a liquid metal working medium enters the barrel from the inlet pipe, sequentially passes through the purification wire mesh assembly and the crystallization wire mesh assembly and then is discharged out of the barrel from the outlet pipe. The device has the advantages that a cold trap method and a hot trap method are combined, physical purification and chemical purification can be conducted at the same time, a loop does not need to be heated or cooled to adapt to different operation temperatures of a cold trap and a hot trap, operation is easier and more convenient, and the purification efficiency and speed can be improved.

Description

technical field [0001] The invention belongs to the field of nuclear industry, and in particular relates to a liquid metal working substance purification device. Background technique [0002] Sodium-potassium eutectic alloy (NaK) is a common liquid metal coolant in fast neutron reactors and some small reactor installations, and oxygen impurities are the main non-metallic impurities. Excessive oxygen content can easily cause adverse consequences such as blockage of flow channels or accelerated corrosion of structural materials, which poses a threat to the operation safety of the device. Therefore, special purification devices are generally installed in sodium-potassium alloy devices to remove oxygen impurities. [0003] The sodium-potassium alloy with a mass ratio of NaK-78 has a melting point of -12°C and is liquid at room temperature. Because sodium will reduce potassium oxide to sodium oxide and elemental potassium, the oxygen impurity in the sodium-potassium alloy mainly ...

AI Technical Summary

Problems solved by technology

This makes it impossible for the cold trap and the hot trap to work at the same time, there is some inconvenience during operation, the purification efficiency is relatively low, and it takes a long time

[0006] In ordinary sodium and sodium-potassium alloy cold traps, since the inlet temperature is generally around 400°C, and the trapping temperature is generally below 200°C, there will be a long path before the liquid metal drops to the cooling temperature. The role of capture, resulting in a waste of space

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