Sodium-potassium alloy vacuum distillation device

Abstract

The invention relates to a material separation device, aims to solve the problem of analyzing impurity content in sodium-potassium alloy through a vacuum distillation mode and provides a sodium-potassium alloy vacuum distillation device. The sodium-potassium alloy vacuum distillation device comprises a distillation still, a crucible, a collecting tank, a refrigeration device and a vacuum unit, wherein a heating device is arranged at the outer part of the distillation still; the collecting tank is a sealed tank body; the middle part of the collecting tank is communicated with the top part of the distillation still through a pipeline; an inner cooler and an outer cooler are arranged in the collecting tank and both connected with the refrigeration device through a coolant pipeline; and the top part of the collecting tank is connected with the vacuum unit. The sodium-potassium alloy vacuum distillation device has a simpler structure, does not have the backflow phenomenon in the distillation process, has the advantages of small sampling quantity, good separation effect of the sodium-potassium alloy, serving as a matrix, high reliability, convenience, rapidness and safety in operation, economy, practicability and the like and better solves the vacuum distillation problem of the sodium-potassium alloy.

Description

Technical field [0001] The invention relates to a material separation device, in particular to a sodium-potassium alloy vacuum distillation device. Background technique [0002] As a heat exchanger with excellent performance, sodium-potassium alloys are more and more widely used in various fields such as nuclear energy and aerospace. The presence of impurities such as oxygen, carbon, nitrogen, and chlorine in sodium-potassium alloys will affect the heat transfer performance of sodium-potassium alloys, and also adversely affect the mechanical properties, service life and reliability of related equipment. [0003] In actual application, in order to accurately grasp the impurity content in sodium potassium alloy, content analysis is required. However, usually the content of impurities in sodium-potassium alloys is on the order of μg / g, and a large amount of matrix sodium-potassium alloys will seriously interfere with the determination of impurities; at the same time, because sodium-p...

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Problems solved by technology

[0005] There are few reports at home and abroad on the technology of vacuum distillation to separate the sodium potassium alloy matrix and impurities

And related technologies, such as the vacuum distillation analysis method of oxygen in sodium, the vacuum distillation-ICP-AES analysis method of calcium in nuclear grade sodium, the vacuum distillation-ICP-AES analysis method of calcium in sodium, and the research and establishment of China Institute of Atomic Energy since the 1970s. The vacuum distillation analysis method of middle oxygen, etc., the separation equipment used in these methods are difficult to apply to the vacuum distillation separation of sodium potassium alloy

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