Determination method and apparatus of liquid hydrocarbon evaporation capacity and diffusion concentration of vapor cloud

Abstract

The invention discloses a determination method and an apparatus of liquid hydrocarbon evaporation capacity and diffusion concentration of vapor cloud. The method comprises recording mass changes of heated liquid in an open cup by using an electronic scale, calculating the evaporation capacity of liquid hydrocarbons under different operating time and temperature by using the law of conservation of mass; using a concentration sensor to determine concentrations of hydrocarbon vapors with different heights from a liquid level of the open cup, recording the ambient temperature when the liquid hydrocarbon evaporates by a temperature sensor, and recording concentration distribution of vapor cloud diffusion of liquid hydrocarbon with different heights from the liquid surface under different operation time and different ambient temperature conditions by using a gas diffusion principle. The method fully uses the law of conservation of mass, and characteristics of volatile liquid hydrocarbon, constant temperature ovens, sensors and data analysis software, realizes determination of the liquid hydrocarbon evaporation capacity and the diffusion concentration of vapor cloud through physical principles, and has important meaning for prevention and controlling of explosion disaster caused by diffusion of vapor cloud of liquid hydrocarbon in reality.

Description

technical field [0001] The invention relates to a method and device for measuring evaporation and concentration distribution, in particular to a measuring device for evaporation of liquid hydrocarbons and diffusion concentration of vapor clouds. Background technique [0002] With the rapid development of economy, liquid hydrocarbons are widely used in industrial production and life. Petroleum liquids such as crude oil, refined gasoline, diesel oil, fuel oil and other oils have many dangerous factors in production and storage due to their chemical composition and their characteristics of fluidity, evaporation, flammability and easy accumulation of static electricity. Caused the possibility of fire and explosion disasters. Gasoline and other liquid oils are extremely volatile, and the coverage area of ​​the dangerous vapor cloud generated after the leakage will greatly exceed the area of ​​the liquid pool. Even in the post-processing and recovery stages of the accident where ...

AI Technical Summary

Problems solved by technology

Vapors of liquid hydrocarbons are flammable and explosive, heat-expandable, easy to accumulate static electricity, highly fluid and expandable, interact with oxidizing strong acids and oxidants, and have varying degrees of toxicity, etc.

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