The 5 Elements of a Dust Explosion
There are five required elements for a dust explosion. They are sometimes referred to as the Dust Explosion Pentagon:
dust collector fire pentagon
A fuel, which is the combustible dust
An oxidant, which is typically the oxygen in the air
An ignition source capable of igniting materials when they are dispersed as a cloud
Dispersion, which is when the accumulated dust is spread out and creates a dust cloud
Confinement, which leads to pressure rise and a potential vessel rupture, facility obstruction or structural collapse
Deflagration
A term often used in connection with dust fires and explosions is ‘deflagration’ and is defined as combustion which propagates through a gas or across the surface of an explosive at subsonic speeds, driven by the transfer of heat. The term is used for both flash fires and explosions. With a dispersed dust cloud, deflagration can cause an unconfined flash fire or, when confined, an explosion that ruptures the containment vessel.
The Two Explosions
Combustible dust explosions often involve two explosions: primary and secondary. The primary explosion is the first to occur when dust suspension in a confined space is ignited and explodes. The first explosion will dislodge other dust that has accumulated which, when airborne, also ignites. A secondary dust explosion is often more destructive than the primary one.
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The 5 Elements of a Dust Explosion
There are five required elements for a dust explosion. They are sometimes referred to as the Dust Explosion Pentagon:
5 عناصر لحدوث انفجار غبارى
هناك خمسة عناصر مطلوبة لانفجار الغبار. يشار إليها أحيانا باسم انفجار الغبار البنتاغون:
A fuel, which is the combustible dust
وقود وهو الغبار القابل للاحتراق
An oxidant, which is typically the oxygen in the air
مؤكسد ، وهو عادة الأكسجين الموجود في الهواء
An ignition source capable of igniting materials when they are dispersed as a cloud
مصدر اشتعال قادر على إشعال المواد عندما تكون مشتتة كسحابة
Dispersion, which is when the accumulated dust is spread out and creates a dust cloud
التشتت ، وهو عندما ينتشر الغبار المتراكم ويخلق سحابة غبار
Confinement, which leads to pressure rise and a potential vessel rupture, facility obstruction or structural collapse
الحبس ، مما يؤدي إلى ارتفاع الضغط وتمزق محتمل للهيكل أو انهيار المنشأة أو الانهيار الهيكلي
Deflagration الاشتعال
A term often used in connection with dust fires and explosions is ‘deflagration’ and is defined as combustion which propagates through a gas or across the surface of an explosive at subsonic speeds, driven by the transfer of heat. The term is used for both flash fires and explosions. With a dispersed dust cloud, deflagration can cause an unconfined flash fire or, when confined, an explosion that ruptures the containment vessel.
المصطلح الذي يستخدم غالبا فيما يتعلق بحرائق الغبار والانفجارات هو "الاحتراق" ويعرف بأنه الاحتراق الذي ينتشر عبر غاز أو عبر سطح مادة متفجرة بسرعات دون سرعة الصوت ، مدفوعا بنقل الحرارة. يستخدم المصطلح لكل من الحرائق المفاجئة والانفجارات. مع سحابة الغبار المشتتة ، يمكن أن يتسبب الاحتراق في نشوب حريق مفاجئ غير محصور أو ، عندما يكون محصورا ، انفجارا يمزق وعاء الاحتواء.
The Two Explosions الانفجاران
Combustible dust explosions often involve two explosions: primary and secondary. The primary explosion is the first to occur when dust suspension in a confined space is ignited and explodes. The first explosion will dislodge other dust that has accumulated which, when airborne, also ignites. A secondary dust explosion is often more destructive than the primary one.
غالبا ما تنطوي انفجارات الغبار القابلة للاحتراق على انفجارين: أولي وثانوي. الانفجار الأساسي هو الأول الذي يحدث عندما يشتعل تعليق الغبار في مكان ضيق وينفجر. سيؤدي الانفجار الأول إلى إزاحة الغبار الآخر الذي تراكم والذي يشتعل أيضا عندما يكون محمولا جوا. غالبا ما يكون انفجار الغبار الثانوي أكثر تدميرا من الانفجار الأساسي.
تم التدقيق والترجمة
