Alkali metal impurity pretreatment apparatus

Abstract

The invention provides an alkali metal impurity pretreatment apparatus which comprises a distillation unit, an operation box, a cooling unit and a vacuumizing unit. The distillation unit is used for distilling alkali metal containing an impurity so as to separate the impurity from the alkali metal; the operation box is used for accommodating the distillation unit and providing a proper operation environment for the distillation unit; the cooling unit is used for providing a cold source for the distillation unit, so that the alkali metal is converted into a liquid state or a solid state from agas state; and the vacuumizing unit is in fluid communication with an inner cavity of the distillation unit so as to provide a required atmosphere environment for the operation box. According to the alkali metal impurity pretreatment apparatus, a heat source is provided for evaporation of alkali metal through the distillation unit, a cold source is provided for condensation of gaseous alkali metalthrough the cooling unit, a safe and reliable external environment is provided for the whole distillation process and the subsequent treatment process of the alkali metal through the operation box, the risk that the alkali metal is polluted in the distillation process is greatly reduced, and the impurity analysis accuracy is improved.

Description

technical field [0001] The invention relates to a device for separating alkali metal substrates during the analysis of alkali metal impurities, and more particularly, to a pretreatment device before the analysis of alkali metal impurities. Background technique [0002] As important chemical raw materials, alkali metals such as sodium, potassium, lithium, and sodium-potassium alloys are widely used in metallurgy, pharmaceuticals, plastics, petrochemicals, and nuclear industries. These materials are widely used as coolants for fast neutron reactors because of their high heat transfer coefficient, high boiling point, and low neutron absorption cross section. The presence of impurities in the above-mentioned alkali metals and alloys will affect their performance, especially the presence of impurities such as oxygen, carbon, and calcium in the alkali metals or alloys will affect the heat transfer performance of the material, and it will also affect the use of the above materials....

AI Technical Summary

Problems solved by technology

However, this method is cumbersome to operate, and there are potential safety hazards, especially when distilling radioactive alkali metals, radioactive waste liquid will be produced, and it is difficult to distill alkali metals (such as sodium potassium alloys) that are liquid at room temperature

In addition, the distillation operation is carried out in the air, which has great safety hazards and pollution risks

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