Explosiveness of hydrocarbon vapours in industrial installations under various conditions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22320%2F20%3A43921755" target="_blank" >RIV/60461373:22320/20:43921755 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.witpress.com/elibrary/wit-transactions-on-engineering-sciences/129/37660" target="_blank" >https://www.witpress.com/elibrary/wit-transactions-on-engineering-sciences/129/37660</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.2495/RISK200081" target="_blank" >10.2495/RISK200081</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Explosiveness of hydrocarbon vapours in industrial installations under various conditions

Popis výsledku v původním jazyce

Cleaning, maintenance and repair works in petroleum transport and storage equipment are activities connected with an increased risk of explosion. After the pipes and vessels have been emptied, residual amounts of flammable liquids can spontaneously evaporate into the equipment vapour space. To appraise the risk of explosion, it is necessary to assess the formation of an explosive mixture of hydrocarbons with air under various operating conditions. A device was designed that simulates the described system at a reduced scale under stationary conditions for which a vapour–liquid equilibrium is reached. The equilibrium gas phase was analysed to determine the influence of temperature, pressure, and initial liquid phase volume proportion on the lower explosion limit percentage value. The results of the experiments were compared with numerical calculations. Aspen HYSYS software was used for theoretical calculations of vapour–liquid equilibrium and estimation of the lower explosive limit percentage value. It has been confirmed that the concentration of flammable substances in the mixture increases with temperature. As expected, the concentration of flammable substances at a certain temperature decreased with increasing pressure, as the partial pressure of flammable substances remained approximately the same at elevated partial pressures of air. The prediction of the vapour phase composition based on equilibrium calculations in the process simulator provided a pessimistic estimate of the results with a higher hydrocarbon concentration than the experimental measurements. Since the theoretical estimate of the composition of the hydrocarbon-containing atmosphere was always on the “safe side”, it seems to be suitable for predicting the risk of explosion in industrial facilities under known conditions – temperature, pressure, composition and amount of flammable substance.

Název v anglickém jazyce

Explosiveness of hydrocarbon vapours in industrial installations under various conditions

Popis výsledku anglicky

Cleaning, maintenance and repair works in petroleum transport and storage equipment are activities connected with an increased risk of explosion. After the pipes and vessels have been emptied, residual amounts of flammable liquids can spontaneously evaporate into the equipment vapour space. To appraise the risk of explosion, it is necessary to assess the formation of an explosive mixture of hydrocarbons with air under various operating conditions. A device was designed that simulates the described system at a reduced scale under stationary conditions for which a vapour–liquid equilibrium is reached. The equilibrium gas phase was analysed to determine the influence of temperature, pressure, and initial liquid phase volume proportion on the lower explosion limit percentage value. The results of the experiments were compared with numerical calculations. Aspen HYSYS software was used for theoretical calculations of vapour–liquid equilibrium and estimation of the lower explosive limit percentage value. It has been confirmed that the concentration of flammable substances in the mixture increases with temperature. As expected, the concentration of flammable substances at a certain temperature decreased with increasing pressure, as the partial pressure of flammable substances remained approximately the same at elevated partial pressures of air. The prediction of the vapour phase composition based on equilibrium calculations in the process simulator provided a pessimistic estimate of the results with a higher hydrocarbon concentration than the experimental measurements. Since the theoretical estimate of the composition of the hydrocarbon-containing atmosphere was always on the “safe side”, it seems to be suitable for predicting the risk of explosion in industrial facilities under known conditions – temperature, pressure, composition and amount of flammable substance.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

—

OECD FORD obor

20704 - Energy and fuels

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

WIT Transactions on Engineering Sciences

ISSN

1743-3533

e-ISSN

—

Svazek periodika

129

Číslo periodika v rámci svazku

XII

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

89-99

Kód UT WoS článku

—

EID výsledku v databázi Scopus

2-s2.0-85096441757