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Method for determining minimum ignition energy of combustible gas in semi-open space

An ignition energy, semi-open technology, applied in the direction of fuel oil testing, material inspection products, etc., can solve the problems of lack of test equipment, flammable gas explosion process test is rare, etc., to achieve the effect of uniform mixing

Inactive Publication Date: 2013-04-10
CHANGZHOU UNIV
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Problems solved by technology

[0004] With the development of the chemical industry and the wide application of organic solvents and combustible gases, combustible gas (liquid vapor) fire and explosion accidents in semi-open spaces such as workshops and warehouses are common. However, there are not many experiments, and the corresponding test equipment is also very lacking.

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  • Method for determining minimum ignition energy of combustible gas in semi-open space
  • Method for determining minimum ignition energy of combustible gas in semi-open space

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Embodiment Construction

[0020] The minimum ignition energy refers to the minimum energy value required to cause a certain concentration of combustibles to burn or explode. It is an important parameter to measure the explosion risk of combustible gas (liquid vapor) and combustible dust, and is also an important technical parameter for electrostatic safety.

[0021] The variation trend of the minimum ignition energy of methane explosion under different concentrations is tested by adopting the method of controlling ignition energy and methane concentration. The explosion limit is about 5% to 15%, therefore, the set methane gas concentration is 5.0%, 5.5%, 6.0%, 6.5%, 7.0%, 7.5%, 8.0%, 8.5%, 9.0%, 9.5%, 10.0%, 11.0%, 12.0%, 13.0%, 14.0% and 15.0%) under the mixed gas ignition test, if the mixed gas explodes, the ignition voltage will be continuously reduced by 100V until no explosion occurs, and then in the last Between the two voltage values ​​of explosion and non-explosion, use the dichotomy method to ...

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Abstract

The invention discloses a method for determining minimum ignition energy of combustible gas in a semi-open space. The determination method disclosed by the invention is an up-and-down method. A comprehensive test device for the blasting characteristics of the combustible gas is mainly composed of a gas delivery and preparation system, a gas pre-mixing system, an explosion chamber, an ignition system and a data acquisition system. Main test items comprise a gas layered test, a gas concentration test, an explosion upper-limit and lower-limit test, an explosion pressure and temperature test, a minimum ignition energy test, an explosion process research, a combustible gas cloud formation and diffusion research, and an explosion suppression effect search. According to the method disclosed by the invention, the mixing of the combustible gas and air is relatively uniform; and the improved 20L gas explosion test device has the advantages of being practical, convenient, cheap and the like, and can be used as a standard test device and a demonstration device for scientific research and teaching in the safety engineering major and the fire and explosion protection major.

Description

technical field [0001] The invention relates to a method for the minimum ignition energy of combustible gas, in particular to a method for measuring the minimum ignition energy of combustible gas in a semi-open space. Background technique [0002] Since the city gas pipeline explosion accident occurred in the UK in 1857, domestic and foreign scholars have carried out long-term research on the explosion characteristics and mechanism of combustible gas. Due to the different emphases of research by scholars from various countries, the size of the test devices used is quite different, and the measured parameters are also different. Therefore, there has not been a unified device for measuring the explosion characteristic parameters of flammable gases (liquid vapor) at home and abroad. [0003] Industrial gas explosions in confined spaces are characterized by great destructiveness and complexity, and countries all over the world have invested a lot of manpower and financial resour...

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Application Information

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IPC IPC(8): G01N33/22
Inventor 黄勇
Owner CHANGZHOU UNIV
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