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Method for determining safety distance of compressed natural gas (CNG) gas station

A safety distance and determination method technology, applied in complex mathematical operations, instruments, data processing applications, etc., can solve the problems of large differences in external safety distances and different determination methods, and achieve the effect of reasonable external safety distance and saving land resources

Inactive Publication Date: 2016-08-17
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for determining the safe distance of a CNG gas filling station. In the current standard specification, only the specific safe distance between the internal process equipment of the CNG gas filling station and the external building (structure) is given, and no specific safety distance is given. The determination method is different, the determination method is different, and the external safety distance is quite different, so as to realize the determination of the external safety distance of the CNG filling station, determine the initial event and the failure frequency of the safety measures, and make the determined external safety distance of the CNG filling station closer In reality, the result is more reasonable

Method used

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  • Method for determining safety distance of compressed natural gas (CNG) gas station
  • Method for determining safety distance of compressed natural gas (CNG) gas station
  • Method for determining safety distance of compressed natural gas (CNG) gas station

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Embodiment

[0026] A method for determining the safe distance of a CNG filling station, comprising the steps of: the first step, measuring the heat of combustion and the mass flow rate of the jet fire; the second step, utilizing formula (1) to obtain the flame length L of the jet fire,

[0027] L = ( H C m ) 0.444 161.66 - - - ( 1 ) ,

[0028] In the formula:

[0029] L——flame length, in m;

[0030] h C —— heat of combustion, in J / kg;

[0031] m——mass flow rate, unit is kg / s;

[0032] The third step is to use formula (2) to calculate the flux of thermal radiation,

[0033] The thermal radiation flux received at a distance of X(m) from the flame point source is shown in formula (2),

[0034] ...

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Abstract

The invention relates to a method for determining a safety distance of a compressed natural gas (CNG) gas station. The method comprises a first step of measuring combustion heat and mass velocity of jet fire; a second step of obtaining a flame length L of the jet fire, calculating flux of thermal radiation, and obtaining a thermal radiation flux received which is X (m) away from a flame point source; a fourth step of utilizing the thermal radiation flux received which is X (m) away from the flame point source to make a comparison with a set thermal radiation flux, and obtaining the safety distance of the CNG gas station. According to the method, against the problems that only a concrete safety distance of an internal process device in the CNG gas station away from an external building is given in the current standard specification, no concrete determination method is given, determination methods are different and external safety distances differ much, the external safety distance of the CNG gas station is determined, initial events and safety measure failure frequency are determined, so that the determined external safety distance of the CNG gas station is close to actual conditions, and the result is also more reasonable.

Description

technical field [0001] The invention belongs to the technical field of safety and environmental protection, and in particular relates to a method for determining a safety distance of a CNG filling station. Background technique [0002] At present, the safety distance of CNG (compressed natural gas) filling stations has become an important social security issue, and it is particularly important to set a reasonable safety distance. "Code for Design and Construction of Automobile Refueling and Gas Stations" GB 50156-2012 stipulates the distance between gas storage wells, gas filling (unloading) equipment, desulfurization and dehydration equipment and compressors The safe distances are 20m, 14m and 12m respectively. However, there is no specific method for determining the safety distance in the standard specification. In the prior art, methods for determining the external safety distance of CNG filling stations mainly include expert judgment methods, consequence-based methods ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/10G06Q10/06G06Q50/26
CPCG06F17/10G06Q10/0635G06Q50/265
Inventor 武志峰张英党文义韩中枢
Owner CHINA PETROLEUM & CHEM CORP
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