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A Method for Estimating the Influence of Environmental Humidity on Explosive Limits of Hydrocarbons and Their Oxygenated Derivatives

A technology of environmental humidity and derivatives, which is applied in the direction of material explosion, and can solve the problems of lack of safety parameters and limited

Inactive Publication Date: 2016-03-30
XI AN JIAOTONG UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, domestic and foreign research on the effect of ambient humidity on the explosion limit is still relatively limited, and the existing research is limited to a small number of flammable substances, and all of them are experimental studies
Due to the large number of combustible substances, it is impossible to conduct experimental research on the explosion limits of all combustible substances at different humidity levels, and there is currently no available method for estimating the relationship between humidity and explosion limits. Oxygen derivatives lack basic safety parameters in the process of safe production, transportation and operation under different environmental conditions

Method used

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  • A Method for Estimating the Influence of Environmental Humidity on Explosive Limits of Hydrocarbons and Their Oxygenated Derivatives
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  • A Method for Estimating the Influence of Environmental Humidity on Explosive Limits of Hydrocarbons and Their Oxygenated Derivatives

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Embodiment Construction

[0042] The estimation method provided by the present invention is applicable to combustibles being C n h m or C n h m o l , among them, l>0, the combustible is introduced below as C n h m o l The specific estimation method, when using the estimation method of the present invention to estimate the combustibles as C n h m When , it is only necessary to set l=0 in the specific estimation steps.

[0043] (1) According to the experimental measurement, C n h m o l Lower explosion limit L in dry air f,pure with explosive cap U f,pure ;

[0044] (2) When C n h m o l The lower explosion limit in moist air is L f , at the lower explosion limit, according to ambient conditions (temperature T 0 , the relative humidity is h) to calculate the C in the mixture n h m o l volume ratio volume ratio of dry air and water vapor volume ratio

[0045]

[0046] where p T0,H2O for water at temperature T 0 Saturation vapor pressure at .

[0047] (3) When C n h m o l...

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Abstract

The invention discloses an estimation method for influences of environment humidity on explosion limits of hydrocarbons and oxygen-containing derivatives thereof. The estimation method comprises the following steps: calculating according to environment humidity conditions to obtain the volume ratio of vapour in air, and with vapour as a flame-retardant gas, estimating according to an estimation method for the temperature of adiabatic flame to obtain the explosion limit value of CnHm / vapour or a CnHmOl / vapour binary mixture, wherein the estimation result is the explosion limit of CnHm or CnHmOl under the humidity conditions. CnHm or CnHmOl is controlled to be in the estimation result range from an upper explosion limit to a lower explosion limit so as to realize safety application of hydrocarbons and oxygen-containing derivatives thereof, thus providing basic safety parameters for hydrocarbons and oxygen-containing derivatives thereof during the processes of safety production, transport, operation and the like under different environmental conditions.

Description

technical field [0001] The invention relates to the field of research on the flammability of gases and liquids, in particular to the research on the explosion limits of gases and liquid vapors, and specifically relates to a method for estimating the influence of ambient humidity on the explosion limits of hydrocarbons and their oxygen-containing derivatives. Background technique [0002] In recent years, with the continuous development of industry, fire accidents have occurred frequently in my country, especially in coal and petroleum related industries, various hydrocarbons (C n h m ) and its oxygen-containing derivatives (C n h m o l ) are highly prone to combustion and explosion. The mixture of flammable substances and air can only be ignited within a certain concentration range, and the maximum concentration and minimum concentration where combustion can occur are called explosion limits. For flammable gases or vapors, the safest way is to control its concentration ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N25/54
Inventor 张可李清孟现阳王庆余吴江涛郭保玲毕胜山
Owner XI AN JIAOTONG UNIV
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