Experimental device and method for measuring combustion and explosion characteristics of dust cloud

Abstract

The invention provides an experimental device and method for measuring combustion and explosion characteristics of a dust cloud. The whole experimental device comprises an electric spark ignition device, a special quartz glass tube, a porous steady-flow powder injection pipeline, a pressure/temperature data acquisition device and a movable detachable fixing frame, and characteristic parameters such as the minimum ignition energy, the explosion pressure and the combustion temperature of the combustion and explosion of the dust cloud can be measured. By the porous gas flow divider designed by the invention, uniform and stable air injection can be realized; by an electric spark trigger circuit, electric sparks with multiple selectable energy levels of small energy and large energy can be realized, and high spark energy precision can be ensured. Explosion venting pieces with different sizes and the self-made movable detachable fixing frame are assembled on the top of the special quartz glass tube, and pressures and temperatures of combustion and explosion of dust clouds with different explosion venting areas and at different positions can be researched.

Description

technical field [0001] The invention relates to an experimental device and method for studying characteristic parameters of dust cloud combustion explosion, belonging to the technical field of dust combustion explosion hazard test research. Background technique [0002] With the continuous development of industrial production technology, flammable and explosive dust has been widely used, which also greatly increases the potential risk of dust explosion. Studying the characteristic parameters of dust explosion has important practical significance for the prevention and control of dust explosion catastrophic accidents. The minimum ignition energy of dust cloud (Minimum Ignition Energy of Dust Cloud, MIE) refers to the minimum energy required to ignite the dust cloud under the most sensitive conditions. It is an important characterization parameter reflecting the hazards of combustible dust. Evaluation and effective explosion protection measures are of great significance. [...

AI Technical Summary

Problems solved by technology

At present, the widely used experimental devices for testing the minimum ignition energy of dust clouds mainly include imported equipment such as Chilworth and MIKE3. There are not many mature products in China, and the equipment has fewer functions and is very expensive.

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