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Chemical storage tank steam cloud explosion accident simulation analysis method and system

A simulation analysis, steam technology, applied in design optimization/simulation, special data processing applications, computer-aided design, etc., can solve problems such as neglect of liquid pool evaporation process, steam cloud explosion accident, result deviation, etc.

Pending Publication Date: 2020-08-14
山东慧泰智能科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Materials stored in chemical storage tanks are usually stored in a liquid state. Once a leak occurs, a liquid pool will be formed in a low-lying area, which is likely to cause a steam cloud explosion accident. However, the traditional simulation of steam cloud explosion accidents often ignores the evaporation process of the liquid pool. For the fuel in the steam cloud The total amount often directly uses the total capacity of the storage tank for numerical calculation, which will inevitably cause deviations in the results

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  • Chemical storage tank steam cloud explosion accident simulation analysis method and system
  • Chemical storage tank steam cloud explosion accident simulation analysis method and system
  • Chemical storage tank steam cloud explosion accident simulation analysis method and system

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specific Embodiment 1

[0074] combine figure 1 , the present invention proposes a chemical storage tank steam cloud explosion accident simulation analysis method, the simulation analysis method includes the following steps:

[0075] S1. Analyze the evaporation process of the liquid pool according to the physical and chemical characteristics of the materials stored in the chemical storage tank and the environmental conditions including wind direction and ground heat. Based on the analysis results, a heat transfer model between the ground and the liquid pool is established to obtain the actual amount of fuel in the vapor cloud. .

[0076] S2, based on the actual amount of fuel in the steam cloud, combined with the TNT equivalent method to establish a steam cloud explosion consequence model, and conduct a simulation analysis of the chemical storage tank steam cloud explosion accident consequences.

[0077] S3, calculate the optimal escape path under the steam cloud explosion state in the storage tank ...

specific Embodiment 2

[0135] Assuming that the LNG storage tank is a single-capacity tank with a height of 25.5m, an outer diameter of 43.5m, and an inner diameter of 41.5m, the filling factor is 85%, and the combustion heat of LNG vapor is 55594KJ / kg. Assuming that the shape of the LNG leakage port is circular, the area of ​​the small hole is A=0.05m2, and the Reynolds coefficient image 3 The flow coefficient found in the flow coefficient chart Re-Cd is 0.50, and the density of LNG is ρ L =450kg / m3, atmospheric pressure p 0 =10100Pa, the pressure in the container is p=110Pa, the acceleration of gravity is taken as the standard value g=9.80665 m / s^2, assuming that the initial liquid level of the leak is h=15m from the height of the leak. Assume that the pressure does not change throughout the leak.

[0136] The concrete steps of adopting the method of the present invention are as follows:

[0137] 1. Calculate the total evaporation of the liquid substance in the storage tank during the evaporatio...

specific Embodiment 3

[0158] Such as figure 2 As shown, the present invention also mentions a chemical storage tank steam cloud explosion accident simulation analysis system, which includes a parameter acquisition module, a total evaporation calculation module, a steam cloud explosion consequence model and a steam cloud explosion consequence simulation model.

[0159] The parameter acquisition module is used to acquire in real time the physical and chemical characteristics of the material stored in the chemical storage tank and the environmental conditions including wind direction and ground heat. Preferably, the physical and chemical characteristics of the stored material in the chemical storage tank and the environmental conditions including wind direction and ground heat include: the height, outer diameter, inner diameter of the storage tank, operating pressure, liquid material density, filling coefficient, wind direction, ground type, Ambient pressure, ambient average wind speed and other para...

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Abstract

The invention discloses a chemical storage tank steam cloud explosion accident simulation analysis method which comprises the following steps: analyzing a liquid pool evaporation process according tophysicochemical characteristics of substances stored in a chemical storage tank and environmental conditions including a wind direction and ground heat, and establishing a heat transfer model betweenthe ground and a liquid pool according to an analysis result to obtain an actual fuel quantity in steam cloud; based on the actual fuel quantity in the steam cloud, creating a steam cloud explosion consequence model in combination with a TNT equivalent method, and simulating and analyzing the steam cloud explosion accident consequence of the chemical storage tank. According to the invention, the analysis result of the steam cloud model is more accurate, the damage degree of life and property caused by the steam cloud explosion accident of the chemical storage tank is simulated and analyzed, and the accuracy of the simulation result is high; and the optimal escape path can be quickly planned according to the explosion simulation result and the actual environment information of the storage tank area, and is displayed on a GIS map in an animation form to prompt workers to quickly evacuate from the dangerous area, so that the casualty risk is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of accident analysis of chemical storage tanks, in particular to a simulation analysis method and system for chemical storage tank steam cloud explosion accidents. Background technique [0002] Vapor cloud explosion is an explosion caused by a large amount of gas or volatile liquid fuel leaking and mixing with surrounding air to form a flammable gas mixture covering a wide range under the action of ignition energy. Compared with general combustion and explosion, gas cloud explosion has a much larger damage range, and the degree of harm caused is also much more serious. Accident consequence simulation analysis can qualitatively and quantitatively simulate the severity of damage caused by a possible accident to surrounding facilities, personnel and the environment, and provide decision makers and designers with information reference for emergency rescue and command. [0003] Materials stored in chemical stora...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F119/08
CPCG06F30/20G06F2119/08
Inventor 凡福林
Owner 山东慧泰智能科技有限公司
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