Test device for combustion characteristics of coal sample under thermal radiation of jet flames in different strengths

Abstract

The invention relates to a test device for combustion characteristics of a coal sample under thermal radiation of jet flames in different strengths. The device can be used for researching the coal sample ignition with non-contact flames. The test device comprises a box, a flame heating component, a coal sample placing component and a detecting component; an experimental platform, a gas-guide portand a fume exhausting pipeline are arranged on the box; the flame heating component comprises a fuel tank and a Bunsen burner; the Bunsen burner is connected with the fuel tank through a conduit; thecoal sample placing component comprises an expansion link, a support rod, a rail and a sample vessel; a rail is arranged on the experimental platform; the expansion link is arranged on the experimental platform; the support rod is arranged on the expansion link; the sample vessel is placed on the tail end of the support rod; the detecting component is arranged in the box and comprises a mass sensor, a photoelectric thermocouple, a radiation heat-flow meter, a gas sensor and a camera; the mass sensor is arranged on the tail end of the support rod; the photoelectric thermocouple, the radiation heat-flow meter and the gas sensor are all arranged on the support rod; a camera is arranged above the box.

Description

technical field [0001] The invention relates to the field of coal combustion experiment devices, in particular to a device for testing the combustion characteristics of coal samples under the thermal radiation of jet flames with different intensities. Background technique [0002] Mine fire is a serious mine disaster accident, which causes a lot of waste of resources and loss of personnel and property every year. Among the coal combustion accidents in mines, the accidents of directly or indirectly igniting coal due to gas combustion account for a relatively large proportion. In a large number of coal mine gas and coal spontaneous combustion fires, the coal sample was not directly in contact with the flame produced by the gas, and the temperature in the area did not reach the ignition point of the coal, but the coal was still ignited. The flame produced by gas combustion is basically similar to the jet fire under laboratory conditions. Therefore, exploring the influence fact...

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Problems solved by technology

[0004] At present, the methods and devices for monitoring the influencing factors of coal sample combustion mainly focus on the influence of coal spontaneous combustion and external temperature and gas on coal combustion, and rarely involve non-contact thermal radiation on the ignition of coal samples.

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