Visual pressurized discrete particle reaction kinetics experiment system

Abstract

The invention discloses a visual pressurized discrete particle reaction kinetics experiment system, and belongs to the field of study on reaction kinetics characteristics of solid fuel particles, suchas fire catching, combustion and gasification. The system is characterized in that an optical view window is formed in a pressure container; a plane flame combustor provided with double-layer squarequartz tubes is used as a heat source; and the visual monitoring on the reaction process of the solid fuel particles in high-temperature and high-pressure environment can be realized. Through the matching of continuous laser and high-speed image pick-up, the mesoscopic morphology and brightness evolution of the particles in the whole process from cold state heating to hot state fire catching luminescence to reaction exhausting can be continuously observed on line; and the characteristic parameters such as the fire catching delay time, the fire catching temperature, the particle temperature change and the particle reaction speed are favorably obtained in the subsequent process through data processing.

Description

technical field [0001] The invention belongs to the research field of reaction kinetic characteristics of solid fuel particles such as ignition, combustion and gasification, and relates to a visualized pressurized experimental system, more specifically, to a visualized pressurized discrete particle reaction kinetics experimental system. Background technique [0002] The reaction kinetic characteristics of micron and nanometer powder fuels such as ignition, combustion and gasification have important reference significance for the design of combustion devices. In practical applications, powder reactions are often in extreme high-temperature and high-pressure environments, which are difficult for most laboratory equipment to achieve. Therefore, there is an urgent need for an experimental system that can simulate the ignition and combustion of fuel particles in an extreme high temperature and high pressure environment, and can accurately and effectively monitor the process. [...

AI Technical Summary

Problems solved by technology

[0003] There are many different types of pressurized experimental systems, such as pressurized thermogravimetric analyzers, pressurized burette furnaces, pressurized fixed beds and pressurized flat flame entrained flow reactors, etc., but these systems have limitations : pressurized thermogravimetry can only study particle combustion in a static state, and the heating temperature is low (generally lower than 1273K), and the heating rate is slow (3-200K / min); the pressurized dropper furnace can reach the environment of high temperature and high pressure, but Its heating rate can only reach a maximum of 10 3 -10 4 K / s; pressurized fixed bed reactants are mostly large particles or accumulated powder layers, and the temperature is generally between 723-1273K, which has a large gap with practical applications

[0004] The pressurized planar flame-carrying flow reactor uses the high-temperature flue gas generated by gas combustion to heat the particles, and its temperature can reach 1800-2000K, and the heating rate can reach 10 5 -10 6 K / s is the closest to the actual environment of particle combustion, but the existing pressurized flat flame burner equipment is basically not equipped with a visual observation system

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