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Evaluation model for environmental risks of dangerous chemical accidents

A technology for hazardous chemicals and environmental risks, which is applied in the field of environmental risk description and assessment models for hazardous chemical accidents, and can solve problems such as the inability to support real-time dynamic assessment of environmental risks.

Inactive Publication Date: 2013-04-17
XINCHANG GUANYANG TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a high degree of uncertainty in each stage of the environmental risk assessment process of hazardous chemical accidents, and the existing assessment system cannot support the real-time dynamic assessment of environmental risks after the accident

Method used

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Examples

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Embodiment Construction

[0009] The present invention will be further described below in combination with principles and specific operation examples.

[0010] 1. According to the classification of heavy gas and non-heavy gas, briefly introduce the important models currently used in the simulation of leakage and diffusion of hazardous chemicals.

[0011] 2. Use ALOHA software to analyze various aspects of diffusion, including the prediction of the influence range of poisonous gas clouds, the prediction of source strength changes, the monitoring of concentration changes at a certain point in space, and the separate marking of flammable and explosive areas, etc. , using physical and chemical knowledge to calculate the source intensity and flashing intensity of the leakage point, and prove that the diffusion in the initial stage of liquid ammonia leakage belongs to heavy gas diffusion, and it will be transformed into non-heavy gas diffusion in about 2.2 minutes, and it will affect the scope of influence P...

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Abstract

The invention provides an evaluation model for environmental risks of dangerous chemical accidents. The evaluation model is used for conducting multiple-factor analysis of environmental risks for environmental risk evaluation, evolution and forecast of dangerous chemical accidents. A combined qualitative and quantitative method is used, on the basis of analyses of key risk factors, dangerous chemicals, surrounding populations, related ecological environment and facilities and the like serve as a whole system, and uncertain environmental risk models which can facilitate risk communication are constructed from the viewing angle of the environmental carrying capacity, the exposure intensity, the degree of uncertainty and the like. A multi-scale environmental risk evaluation system is established to study environmental risk dynamic evolution laws and dynamic evaluation methods of dangerous chemical accidents. The migration and transformation laws of dangerous chemicals in the environment are studied to develop dynamic evaluation of environmental risks of dangerous chemical accidents.

Description

technical field [0001] The invention relates to the field of risk assessment and prediction, in particular to an environmental risk description and assessment model of hazardous chemical accidents. Background technique [0002] Although my country has realized the importance of hazardous chemical accident risk management in the middle and late 1990s, it has only recently focused on the environmental risk assessment and analysis of hazardous chemical accidents. Due to the inherent complexity of environmental risk assessment brought by the biodiversity and variability in the environment, most countries, including China, still focus on qualitative estimation and expert judgment, and research in this area in some advanced countries is also semi- Quantitative and index-based methods are predominant. Existing environmental risk assessment methods and models include general gravity level assessment, environmental accident index method, method based on questionnaire and expert judg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 刘璐
Owner XINCHANG GUANYANG TECH DEV
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