Minimum ignition energy testing device

Abstract

The invention discloses a minimum ignition energy testing device which is characterized by comprising an explosion cavity, a heating system, a vacuumizing system, a gas supply system, a powder spraying system, an ignition system, a data acquisition system, a controller and a sample injection system, wherein the heating system, the vacuumizing system, the gas supply system, the powder spraying system, the ignition system, the data acquisition system and the sample injection system are all connected with the explosion cavity, the heating system and the powder spraying system are both connected with the controller, and the ignition system, the gas supply system and the powder spraying system are all connected with the data acquisition system. According to the invention, tests of different temperatures, ignition time, ignition energy, combustible mixture ratio and the like can be carried out, so that a basis is provided for industrial production dust explosion accident prevention; the problems of liquid sample loading and steam preparation are solved, and meanwhile, different proportions of inflammable steam and dust mixtures can be configured, so that the explosive test of the liquidsteam and dust mixtures is more reasonable.

Description

technical field [0001] The invention relates to a minimum ignition energy testing device, in particular to a minimum ignition energy testing device. Background technique [0002] With the development of modern industry, the production and use of combustible dust are becoming wider and wider, and the accompanying dust explosion accidents are also increasing. In the typical process of tobacco processing, the shred drying process is to dry shredded tobacco with saturated water vapor. As the temperature rises, the activity of the dust is strengthened, and a small amount of combustible gas will be released. The minimum ignition energy of the dust will become smaller, and the dust explosion will occur. The risk is increased; the flavoring process is to add various solid or liquid flavors and fragrances to the shredded tobacco, and the alcohol as a solvent evaporates to form alcohol vapor and dust particles that enter the dust removal system together, and the minimum ignition energ...

AI Technical Summary

Problems solved by technology

However, the existing explosion test equipment is mainly for testing flammable gas mixture or combustible dust at ambient temperature, and cannot test the minimum ignition energy of flammable liquid vapor and combustible dust mixture.

Some devices are heated by oil baths or heating plates, which may have potential safety hazards. Once thermal runaway occurs, it is easy to cause accidents and injuries

[0005] On the other hand, most of the existing experimental devices for testing the minimum ignition energy use the Hartmann tube test device with electrodes to control the ignition energy, which cannot change the experimental conditions such as the ambient temperature and pressure of the test. The Hartmann tube is a semi-open structure and cannot be effectively sealed. , the pressure bearing capacity is limited, so the test conditions are more limited

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