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Method to mitigate the consequences of an unconfined or partially confined vapor cloud explosion

A technology of steam cloud explosion and confined space, which is applied in fire rescue and other fields, and can solve problems such as mitigating steam cloud explosion, etc.

Inactive Publication Date: 2011-06-22
TOTAL RES & TECH FELUY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] US 5096679 deals with the release of non-combustible pollutants in the environment, but does not mention methods of mitigating the consequences of vapor cloud explosions in open spaces or partially enclosed spaces

Method used

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  • Method to mitigate the consequences of an unconfined or partially confined vapor cloud explosion
  • Method to mitigate the consequences of an unconfined or partially confined vapor cloud explosion
  • Method to mitigate the consequences of an unconfined or partially confined vapor cloud explosion

Examples

Experimental program
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Effect test

Embodiment

[0050] In the following examples, flame acceleration suppression products are referred to as retarders or mitigating agents.

[0051] Explosion vessel and test protocol configuration

[0052] Experiment in the explosion test module. The module is 8.0m long, 2.5m high and 2.5m wide, thus having a 50.0m 3 volume of. The modules have a crude steel grid forming a mezzanine deck 1.25m above the bottom of the vessel. Some of the standard objects (obstacles) within the module were removed to generate the explosive load scheme required for the test. Figure 2.1 shows the module before the explosion test.

[0053] Orientation and survey positions within the module are described using an x-y-z coordinate system, where the southeast corner (front left) at the lower deck floor level is defined as the origin. Compass directions are also used to indicate the module's location and bounding orientation. front wall Facing east and the retarder distribution system is installed in the top...

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Abstract

The present invention concerns a method to mitigate the consequences of an unconfined or partially confined vapor cloud explosion due to the accidental release of a flammable gas in an open area, wherein: means capable to release a flame acceleration suppression product are dispersed in said area, a signal is generated by a detector of said flammable gas release, or by an operator, or by an approaching flame or by the explosion itself, or by any combination thereof, said signal activates the release of the flame acceleration suppression product in said area and in a sufficient amount to transform the flammable cloud into a mixture of flammable product, air and said flame acceleration suppression product to prevent flame accelerations in an unconfined vapor cloud explosion but to let the flammable product burn in case of ignition. In a specific embodiment the release of the flame acceleration suppression product is made by a signal generated by a detector of said flammable gas release or by an operator and before ignition or beginning of an explosion.

Description

technical field [0001] The present invention is a method of mitigating the consequences of an unconfined or partially confined vapor cloud explosion by inhibition. A particular hazard in petrochemical plants and refineries is the accidental release of large quantities of combustible material, which leads to the formation of combustible clouds within the plant. Historical evidence shows that ignition of such a cloud can result in a devastating explosion and complete destruction of the device. Such accidents are commonly referred to as "Vapor Cloud Explosions" (VCE) or "Open Space Vapor Cloud Explosions" and are referred to as "VCE". [0002] Flame retardation refers to the weakening of the flame, ie, the reduction in the rate of the overall exothermic reaction in the flame. This attenuation may or may not result in extinguishment, depending on the flow field in which the flame exists. [0003] This is distinguished from fire suppression, flame extinction, or flame extinguish...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62C39/00
CPCA62C99/0018A62C3/06A62C99/0045A62C99/009A62C37/04A62C99/00A62C3/00A62C35/13
Inventor 利奥波尔德.霍雷尔贝克
Owner TOTAL RES & TECH FELUY
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