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Measurement method for drain diffusion area concentration distribution of liquefied hydrocarbon storage device

A storage device, leakage diffusion technology, applied in the direction of calculation, design optimization/simulation, special data processing applications, etc., can solve the problems of measurement result error, complex method, poor emergency response, etc., to achieve wide application range, cost-effective, and reduce personnel Effects on casualties and property damage

Inactive Publication Date: 2018-07-31
CHINA AEROSPACE CONSTR GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, none of these methods can reasonably fully consider the natural environmental conditions at the time of the leakage site, resulting in large errors in the calculation results, and some methods are relatively complex and have poor emergency response, which cannot be well applied to actual accidents and disasters. prevention and disaster relief

Method used

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  • Measurement method for drain diffusion area concentration distribution of liquefied hydrocarbon storage device
  • Measurement method for drain diffusion area concentration distribution of liquefied hydrocarbon storage device
  • Measurement method for drain diffusion area concentration distribution of liquefied hydrocarbon storage device

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Embodiment 1

[0089]This embodiment discloses a method for measuring and calculating the concentration distribution of the leakage and diffusion area of ​​a liquefied hydrocarbon storage device. The calculation method includes the following steps:

[0090] A: Establish a three-dimensional geometric model of the liquefied hydrocarbon storage device;

[0091] B: meshing the three-dimensional geometric model;

[0092] C: setting the calculation condition parameters according to the environmental state and leakage situation of the liquefied hydrocarbon storage device;

[0093] D: Use Fluent software to simulate and calculate the concentration distribution of the liquefied hydrocarbon leakage and diffusion area, and obtain the concentration distribution value of the leakage and diffusion area.

[0094] Exemplarily, the calculation condition parameters include: the wind direction and wind speed at the location of the liquefied hydrocarbon storage device, the diameter of the leak hole, the durati...

Embodiment 2

[0112] On the basis of Embodiment 1, this embodiment discloses a practical application example of a method for measuring and calculating the concentration distribution in the leakage diffusion area of ​​a liquefied hydrocarbon storage device.

[0113] In this embodiment, the measurement object, that is, the liquefied hydrocarbon storage device, is a leaking tank truck. The tank car is 15m long, 4m high, and 2.5m wide. The size of the tank body is Ф2.475×12.85m. The calculation domains along the XYZ directions are 100m, 400m, and 100m respectively. According to step A, perform three-dimensional geometric modeling on the tanker.

[0114] According to step B, use the full hexahedron meshing method to mesh the 3D geometric model and computational domain of the tanker, and obtain a segmentation structure with a total of 1.2 million meshes. Exemplarily, ICEM software can be used for grid division.

[0115] According to step C, the calculation condition parameters are set according...

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Abstract

The invention discloses a measurement method for the drain diffusion area concentration distribution of a liquefied hydrocarbon storage device. The method comprises the following steps that: establishing a three-dimensional geometric model of the liquefied hydrocarbon storage device; carrying out mesh generation on the three-dimensional geometric model; according to an environment state where theliquefied hydrocarbon storage device is positioned and a leakage situation, setting a measurement condition parameter; and utilizing Fluent software to carry out numerical simulation calculation on the drain diffusion area concentration distribution of the liquefied hydrocarbon storage device to obtain a drain diffusion area concentration distribution numerical value. By use of the measurement method for the drain diffusion area concentration distribution of the liquefied hydrocarbon storage device, the environment state where the liquefied hydrocarbon storage device is positioned and the leakage situation are comprehensively considered, drain diffusion area concentration distribution measurement is realized, the concentration distribution of the area where leakage gas may be diffused canbe accurately measured so as to bring convenience to emergency personnel in carrying out corresponding coping processing, casualties and property loss are avoided or reduced, and the method has the advantages of high in measurement accuracy, high in analog simulation degree, wide in applicable range, economic, efficient, simple, convenient and the like.

Description

technical field [0001] The invention belongs to the technical field of liquefied hydrocarbon safety, in particular, it is a method for measuring and calculating the concentration distribution of the leakage diffusion area of ​​a liquefied hydrocarbon storage device. Background technique [0002] Due to equipment aging, corrosion, pipe and weld defects, etc., leakage accidents of liquefied hydrocarbon storage tanks occur frequently, causing fires and explosions, causing serious consequences of casualties and environmental pollution. According to statistics, in recent years, liquefied hydrocarbon fire accidents have shown high incidence characteristics compared with other fire accidents, and the number of casualties and direct economic losses caused by liquefied hydrocarbon fire accidents are several times or even ten times higher than other fire accidents. [0003] When a leakage accident occurs, liquefied hydrocarbons will diffuse into the atmosphere to form a heavy gas clou...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23G06F2111/10
Inventor 李捷张静远陈霰郭海滨吕喜祥
Owner CHINA AEROSPACE CONSTR GROUP