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Measuring device for combustion propagation velocity of liquid alkali metal

A technology of propagation velocity and measuring device, which is applied in chemical analysis by combustion, etc., can solve problems such as ignoring the interaction of sodium droplets, and achieve the effects of accurate and reliable structure, increased reliability and high safety

Active Publication Date: 2017-08-29
HARBIN ENG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Measuring device for combustion propagation velocity of liquid alkali metal
  • Measuring device for combustion propagation velocity of liquid alkali metal
  • Measuring device for combustion propagation velocity of liquid alkali metal

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Embodiment Construction

[0025] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0026] combine Figure 1-8 , the present invention includes a combustion container, a combustion crucible, a combustion rod, a heating device, and an electric control box. The combustion vessel used in the experiment is divided into upper, middle and lower parts. The upper part is a heating combustion device, a crucible 1-16 with double nozzles is placed in the upper chamber, and there are electric heating wires 1-17 around it to heat it. Just above the opening of the crucible 1-16, there is a combustion rod 1-14 for extruding liquid sodium 1-1, and the combustion rod 1-14 is pushed up and down by a motor 1-11 positioned above it. The plexiglass cover 1-9 on the top of the container makes the liquid sodium 1-1 in the crucible in the protective gas to avoid oxidation. The middle part of the combustion container is the combustion chamber and the observation chamb...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/12
CPCG01N31/12
Inventor 张智刚刘翀翀马瑶龙孙树斌乔彦宇刘中坤
Owner HARBIN ENG UNIV
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