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Method for comprehensively evaluating the combustible dust explosion hazard level by utilizing multi-element dust explosion parameters

A dust explosion and comprehensive assessment technology, applied in data processing applications, instruments, calculations, etc., can solve the problem of no dust explosion assessment and classification system, and achieve the effect of avoiding cumbersome calculations and experiments and intuitive results.

Inactive Publication Date: 2019-02-26
NANJING UNIV OF SCI & TECH
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Problems solved by technology

But so far there is not a very sound and convincing dust explosion assessment and classification system, which still needs to be further studied

Method used

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  • Method for comprehensively evaluating the combustible dust explosion hazard level by utilizing multi-element dust explosion parameters
  • Method for comprehensively evaluating the combustible dust explosion hazard level by utilizing multi-element dust explosion parameters
  • Method for comprehensively evaluating the combustible dust explosion hazard level by utilizing multi-element dust explosion parameters

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Embodiment Construction

[0061] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0062] Check the existing literature to collect the minimum ignition energy (MIE), minimum ignition temperature of dust cloud (MIT-C), minimum ignition temperature of dust layer (MIT-L), lower explosion limit (LEL), maximum explosion pressure ( P max ), the maximum explosion pressure rise rate ((dP / dt) max ) And the explosion index (K st )Characteristic parameters, see Table 1 for details.

[0063] Table 1 Part of the dust explosion parameter table

[0064]

[0065] 1. Establish membership function

[0066] Use the assignment function method to separately perform MIE, MIT-C, MIT-L, LEL, P max , (DP / dt) max And Kst7 parameters to establish the corresponding membership function, respectively expressed as μ(u 1 ), μ(u 2 ), μ(u 3 ), μ(u 4 ), μ(u 5 ), μ(u 6 ), μ(u 7 ).

[0067] 1.1 Establishment of MIE membership function

[0068] Such as figure 1 As shown, it is easy t...

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Abstract

The invention discloses a method for comprehensively evaluating the combustible dust explosion hazard level by utilizing multi-element dust explosion parameters. The method adopts fuzzy mathematics theory and analytic hierarchy process (AHP) in the system evaluation method, Using representative conventional explosives, According to the minimum ignition energy of dust cloud, the minimum ignition temperature of dust cloud, the minimum ignition temperature of dust layer, the lower limit of explosion, the maximum explosion pressure, the maximum explosion pressure rise rate and the characteristic parameters of explosion index, the membership function is established, and the evaluation model is established to evaluate the explosion hazard of different dust. The comprehensive evaluation method ofthe combustible dust explosion hazard grade established by the invention is simple, Easy to popularize, avoid tedious calculation and test, combine the existing data to obtain the corresponding comprehensive index value, easy to form a common evaluation standard, the result is intuitive, rapid identification of combustible dust dust explosion hazards, can provide guidance for the enterprise design safety production process.

Description

Technical field [0001] This method is a theoretical method involving the comprehensive evaluation of the risk of dust explosion, specifically involving the use of dust cloud minimum ignition energy (MIE), dust cloud minimum ignition temperature (MIT-C), dust layer minimum ignition temperature (MIT-L) ), lower explosion limit (LEL), maximum explosion pressure (P max ), the maximum explosion pressure rise rate ((dP / dt) max ) And the explosion index (K st ) A method for comprehensive evaluation of the risk level of combustible dust explosion with characteristic parameters. Background technique [0002] There are many parameters for evaluating the risk of dust explosion, such as the minimum ignition energy of dust cloud (MIE), minimum ignition temperature of dust cloud (MIT-C), minimum ignition temperature of dust layer (MIT-L), lower explosion limit (LEL), maximum Explosion pressure (P max ), the maximum explosion pressure rise rate ((dP / dt) max ) And the explosion index (K st ). ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06
CPCG06Q10/0635G06Q10/06393
Inventor 何中其宋伟华马汉翔陈网桦
Owner NANJING UNIV OF SCI & TECH
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