Inerting of pipelines containing vapors of complex hydrocarbon mixtures

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00007064%3AK02__%2F18%3AN0000037" target="_blank" >RIV/00007064:K02__/18:N0000037 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.ishpmie2018.com" target="_blank" >http://www.ishpmie2018.com</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Inerting of pipelines containing vapors of complex hydrocarbon mixtures

Popis výsledku v původním jazyce

Purging of pipelines using air before repairs and maintenance work presents a major risk as a mixture of hydrocarbons with air is created. Determination of dangerous hydrocarbon concentration range is straightforward for simple mixtures of gaseous hydrocarbons, e.g. natural gas, with air. To determine the explosive concentration range for complicated mixtures of volatile hydrocarbons such as vapors of crude oil or petroleum products present a challenging task. If flammable vapors are formed by evaporation of liquid, the actual flammable mixture composition is based on vapor-liquid equilibrium and thus depends on temperature and pressure, as well as on initial gas – liquid ratio. To avoid fire hazard in case of purging pipelines used for transportation of flammable liquids, inert gases are used instead of air. Pure nitrogen can be used, however a gas mixture with high content of nitrogen represents an advantageous option from the economic point of view. Such mixtures can be prepared on site and thus transportation and production cost of the inert gas can be cut. The safe residual concentration of air (or oxygen) in an inerting mixture should be determined. To determine the content of nitrogen in an inerting media, at which the formation of flammable mixture with hydrocarbon vapors is avoided, set of explosion tests were carried out using 10 L spherical steel vessel at varied pressure and volatile hydrocarbon concentrations. Based on the results, the efficiency of the on-site inert gas generators was assessed using the residual amount of oxygen in the inert gas as the main parameter.

Název v anglickém jazyce

Inerting of pipelines containing vapors of complex hydrocarbon mixtures

Popis výsledku anglicky

Purging of pipelines using air before repairs and maintenance work presents a major risk as a mixture of hydrocarbons with air is created. Determination of dangerous hydrocarbon concentration range is straightforward for simple mixtures of gaseous hydrocarbons, e.g. natural gas, with air. To determine the explosive concentration range for complicated mixtures of volatile hydrocarbons such as vapors of crude oil or petroleum products present a challenging task. If flammable vapors are formed by evaporation of liquid, the actual flammable mixture composition is based on vapor-liquid equilibrium and thus depends on temperature and pressure, as well as on initial gas – liquid ratio. To avoid fire hazard in case of purging pipelines used for transportation of flammable liquids, inert gases are used instead of air. Pure nitrogen can be used, however a gas mixture with high content of nitrogen represents an advantageous option from the economic point of view. Such mixtures can be prepared on site and thus transportation and production cost of the inert gas can be cut. The safe residual concentration of air (or oxygen) in an inerting mixture should be determined. To determine the content of nitrogen in an inerting media, at which the formation of flammable mixture with hydrocarbon vapors is avoided, set of explosion tests were carried out using 10 L spherical steel vessel at varied pressure and volatile hydrocarbon concentrations. Based on the results, the efficiency of the on-site inert gas generators was assessed using the residual amount of oxygen in the inert gas as the main parameter.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20402 - Chemical process engineering

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the Twelfth International Symposium on Hazards, Prevention and Mitigation of Industrial Explosions (XII ISHPMIE), Kansas City, MO, August 12‐17, 2018

ISBN

978-1-5323-8443-1

ISSN

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e-ISSN

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Počet stran výsledku

11

Strana od-do

1025-1035

Název nakladatele

Published by Fike Corporation

Místo vydání

Blue Springs, MO, USA

Místo konání akce

Kansas City USA

Datum konání akce

12. 8. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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