Medium-size reaction material thermal runaway critical parameter testing device and method

Abstract

The invention discloses a medium-size reaction material thermal runaway critical parameter testing device and method. The device stirs through magnetic force at the bottom; the to-be-detected materialis kept in a uniform stirring state; under the condition of constant temperature, the rotating speed is adjusted through the rotation of a motor at the bottom of a reactor and a turbidity sensor, sothat the to-be-tested material is kept in a uniform stirring state, the simulation of the actual condition of the thermal runaway process of the reaction material is realized, and the problem of thermal runaway critical parameter test of a uniform stirring liquid reaction system is solved. The reaction runaway critical parameter testing device and the testing method disclosed by the invention canbe used for testing thermal out-of-control critical parameters of reaction materials from laboratory magnitude to kilogram level; the simulation of the actual condition of the reaction material thermal runaway process is realized, the accuracy of the test process is improved, the safety of the test process is ensured, and the application range of the thermal runaway critical parameter test deviceis expanded.

Description

technical field [0001] The invention belongs to the field of physical and chemical testing, and relates to a testing device and method for critical parameters of thermal runaway of medium-sized reaction materials. Background technique [0002] The synthesis of typical energetic compounds often involves a thermal runaway reaction process, the temperature of the reaction process changes drastically, and the coupling effect among the temperature field, velocity field, and concentration field is large. If the process conditions are not properly controlled (feeding is too fast or the cooling temperature is not low enough), the reaction heat cannot be effectively removed, which will lead to the accumulation of reaction heat and accelerate the reaction speed. As the temperature increases, the heat of reaction increases exponentially, while the cooling heat of the reactor only increases linearly with the temperature. As the temperature rises further, local overheating will occur, w...

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Problems solved by technology

[0003] Most of the synthetic reactions are carried out under isothermal conditions, and the current instruments for isothermal thermal runaway testing of synthetic reactions mainly include microcalorimeters or test devices for studying thermal explosions of energetic materials, but such devices and methods will There are several problems in the following aspects: (1) The microcalorimeter test samples are all milligram-level, suitable for thermal runaway tests of small sample sizes, and cannot be used for thermal runaway tests of laboratory-level to kilogram-level synthetic reactions; (2) ) The thermal explosion test device for energetic materials is a static material test, suitable for testing critical parameters of thermal explosion in homogeneous solid or liquid systems. For heterogeneous (solid-liquid mixing, delamination, settlement, etc.) Phase separation will occur in the medium, so it is impossible to test the critical parameters of thermal explosion of heterogeneous solid or liquid systems

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