Measuring device for combustion propagation velocity of liquid alkali metal

Abstract

The invention aims at providing a measuring device for combustion propagation velocity of liquid alkali metal. A heating combustion device is arranged at the upper part of the measuring device; a crucible with double spray nozzles is arranged in an upper chamber; a combustion rod for extruding liquid sodium is arranged at the upper part just opposite to an opening of the crucible; the combustion rod is pushed by a motor located above the combustion rod to vertically move; by using an organic glass cover at the upper part of a container, the liquid sodium in the crucible is located in protective gas; a combustion chamber and an observation chamber for a sodium drop oxidative combustion experiment are arranged at the middle part of the combustion container; electric heating wires and a thermocouple are also arranged at the lower part of the container and are used for heating mixed gas introduced into the combustion chamber; a sodium receiving device is arranged at the lower part of the container and is used for accommodating sodium drops falling before the experiment and preventing the influence on the experiment due to surrounding flow of the sodium drops. According to the measuring device provided by the invention, combustion experiments under different conditions can be finished, and different initial oxygen concentrations and the combustion propagation velocities of the liquid alkali metal at different initial sodium temperatures can be measured; the measuring device lays a foundation for researching a large-scale spray sodium-fire experiment and provides technical support for preventing and dealing with sodium-fire accidents.

Description

technical field [0001] The present invention relates to an alkali metal experimental device, in particular to an alkali metal combustion experimental device. Background technique [0002] There are many forms of liquid alkali metal fires. The sodium fire in the fast reactor basically has two modes, one is released into the containment in the form of spray due to the rupture of the pipeline, and the other is accumulated on the ground to form a pool-type sodium fire. That is, spray sodium fire and pool sodium fire. Sodium spray fire is a more serious combustion mode than pool sodium fire because sodium spray combustion has a higher velocity, and spray sodium fire combustion is carried out in a highly fragmented state, that is, in the form of sodium droplets. Sodium droplet combustion is the basis of various forms of sodium fire research, so the study of sodium droplet combustion characteristics is of great significance. [0003] At present, some theoretical and experimental ...

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Problems solved by technology

[0003] At present, some theoretical and experimental studies on sodium fire accidents have been carried out internationally. Most of the research on sodium droplet combustion is based on a single sodium droplet, and the interaction between sodium droplets after leakage has been ignored.

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