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Method for testing minimum ignition temperature of dust cloud in inert atmosphere

A technology of ignition temperature and inert atmosphere, applied in measurement devices, material thermal analysis, instruments, etc., can solve the problems of dust cloud combustion and explosion, casualties, property losses, etc., to achieve stable device operation, avoid risks, and improve economic benefits. Effect

Pending Publication Date: 2022-06-28
NANJING UNIV OF SCI & TECH
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Problems solved by technology

In a high-temperature and dry space, dust clouds are prone to combustion and explosion when they encounter open flames, resulting in casualties and property losses

Method used

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  • Method for testing minimum ignition temperature of dust cloud in inert atmosphere

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Embodiment 1

[0014] The invention provides a method for testing the lowest ignition temperature of dust clouds in an inert atmosphere, which is used to test the lowest ignition temperature of dust clouds in an inert atmosphere through the combination of a dust cloud lowest ignition temperature testing device and an atmosphere inerting device. The dust cloud minimum ignition temperature test device includes a tubular heating furnace, a quartz furnace body, a powder storage room, a gas storage room, a temperature control module, etc.; the atmosphere inerting device consists of a high-pressure gas cylinder, a valve group, a precision pressure gauge, It consists of precision vacuum gauge, air compressor, vacuum pump and glove box. According to the test needs, different gas cylinder combinations are used for gas distribution, and the prepared gas under pressure is stored in the gas distribution container. The prepared gas can be delivered to the gas storage chamber of the standard test device, ...

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Abstract

The invention relates to measurement of the lowest ignition temperature of dust cloud and a dust layer in an inert atmosphere, and further explores the influence of a gas inerting technology on the dust ignition temperature. A dust cloud minimum ignition temperature testing device is combined with an atmosphere inerting device to test the dust cloud minimum ignition temperature under the inert atmosphere, and the testing device comprises the dust cloud minimum ignition temperature testing device and the atmosphere inerting device. The dust cloud minimum ignition temperature testing device comprises a main furnace body part and a temperature controller, the main furnace body part is formed by connecting a tubular heating furnace, an observation chamber, a sample loading chamber and a powder spraying device, and different gas cylinder combinations are adopted for testing under the gas phase inerting condition according to needs. According to the technical scheme, the method for testing the minimum ignition temperature of the dust cloud in the inert atmosphere better solves the problem of testing the minimum ignition temperature of the dust cloud in the inert atmosphere.

Description

technical field [0001] The present invention relates to a test method for the minimum ignition temperature of dust in an inert atmosphere. Background technique [0002] Due to the actual production needs of the process conditions, the formation of dust clouds is often difficult to avoid, and gas inerting is a commonly used technique to control dust explosions. [0003] In recent years, metal dust explosion accidents have occurred frequently. Compared with combustible gas explosions, dust explosions have the characteristics of large explosion energy, secondary explosions, and toxic gases. In addition, due to the short duration of dust explosion and the long burn-out time of particles, there will be unburned high-temperature powder particles, resulting in more serious burns. With the rapid development of modern industry, in the process of production, processing, transportation and storage of dust industries such as mining, metallurgy, chemical industry, metal, and grain, the ...

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Application Information

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IPC IPC(8): G01N25/50
CPCG01N25/50
Inventor 唐双凌周星宇毛立黄寅生
Owner NANJING UNIV OF SCI & TECH
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