Dear all , pls explain principle for spark arrestor & Flame arrestor . How to decide /Check effectiveness of both. Regards, ABhay
From India, Mumbai
49From India, Mumbai
Dear Abhay,
All internal combustion engines produce exhaust particles which are predominately carbon with contaminates. These particles originate from deposits formed on the internal surfaces of the engine or exhaust system and, depending on their exact origin, may be expelled at temperatures in excess of 3,000 °F. Depending on the nature of the contaminates, these particles are capable of glowing or sometimes flaming combustion. When expelled through the exhaust system into the atmosphere, the combustion process may continue or even be accelerated during flight. Such particles, if larger than 0.023-inch in diameter and at temperatures of 1,200 °F, are capable of igniting cellulose materials upon contact. It is a safety problem and only remedy is use of spark arrester.
A spark arrestor mimics a net fashioned from tightly interwoven wire gauze built to resist bits of ash, sparks or other such dangers. It traps or pulverizes exhaust carbon particles to a size below 0.023-inch in diameter, as they are expelled from an exhaust system. Trap-type spark arresters must have a method for removal of accumulated carbon particles. Most spark arresters generally perform in the high 90 percent spark arresting effectiveness range.
A flame arrestor is a mesh or perforated metal insert within a flammable storage container (safety can, cabinet) which protects its contents from external flames or ignition. It also dissipates heat. It allows gas to pass through it but stops a flame in order to prevent a larger fire or explosion. There is an enormous variety of situations in which flame arrestors are applied. Anyone involved in selecting flame arrestors needs to understand how these products work and their performance limitations. One example is Davy safety lamps used in mines.
Flame arrestors of numerous varieties have been applied in many industries. All of them operate on the same principle: removing heat from the flame as it attempts to travel through narrow passages with walls of metal or other heat-conductive material.
Flame arrestors are used in refining, pharmaceutical, chemical, petrochemical, pulp and paper, oil exploration and production, sewage treatment, landfills, mining, power generation, and bulk liquids transportation. In some cases, the flames involve exothermic (heat-producing) reactions other than oxidation. In these industries processes involve numerous equipment configurations and gas mixtures.Mainly there are two types:
1. End-of-line, vent-to-atmosphere type mainly used in applications such as petroleum storage tank vents.
2. In-line, deflagration or detonation type used mainly in pipes to prevent flames from passing through.
Since applications are different there are very many designs and capacities. A competent person has to check and adopt the most suited one for his use.
Regards,
Kesava Pillai
From India, Kollam
All internal combustion engines produce exhaust particles which are predominately carbon with contaminates. These particles originate from deposits formed on the internal surfaces of the engine or exhaust system and, depending on their exact origin, may be expelled at temperatures in excess of 3,000 °F. Depending on the nature of the contaminates, these particles are capable of glowing or sometimes flaming combustion. When expelled through the exhaust system into the atmosphere, the combustion process may continue or even be accelerated during flight. Such particles, if larger than 0.023-inch in diameter and at temperatures of 1,200 °F, are capable of igniting cellulose materials upon contact. It is a safety problem and only remedy is use of spark arrester.
A spark arrestor mimics a net fashioned from tightly interwoven wire gauze built to resist bits of ash, sparks or other such dangers. It traps or pulverizes exhaust carbon particles to a size below 0.023-inch in diameter, as they are expelled from an exhaust system. Trap-type spark arresters must have a method for removal of accumulated carbon particles. Most spark arresters generally perform in the high 90 percent spark arresting effectiveness range.
A flame arrestor is a mesh or perforated metal insert within a flammable storage container (safety can, cabinet) which protects its contents from external flames or ignition. It also dissipates heat. It allows gas to pass through it but stops a flame in order to prevent a larger fire or explosion. There is an enormous variety of situations in which flame arrestors are applied. Anyone involved in selecting flame arrestors needs to understand how these products work and their performance limitations. One example is Davy safety lamps used in mines.
Flame arrestors of numerous varieties have been applied in many industries. All of them operate on the same principle: removing heat from the flame as it attempts to travel through narrow passages with walls of metal or other heat-conductive material.
Flame arrestors are used in refining, pharmaceutical, chemical, petrochemical, pulp and paper, oil exploration and production, sewage treatment, landfills, mining, power generation, and bulk liquids transportation. In some cases, the flames involve exothermic (heat-producing) reactions other than oxidation. In these industries processes involve numerous equipment configurations and gas mixtures.Mainly there are two types:
1. End-of-line, vent-to-atmosphere type mainly used in applications such as petroleum storage tank vents.
2. In-line, deflagration or detonation type used mainly in pipes to prevent flames from passing through.
Since applications are different there are very many designs and capacities. A competent person has to check and adopt the most suited one for his use.
Regards,
Kesava Pillai
From India, Kollam
Dear Kesava Sir ,
First of all thank you very much for this explanation .
This question raised in mind when security person was fitting spark arrestor ( they called it as a Dholki/Mufler etc.) to one vehicle entering into company.
Sir , I request you to guide us that is their any simple check point/Inhouse method to check the device ( spark arrestor & flame arrestor) is upto the mark or not ?
Regards,
Abhay
From India, Mumbai
First of all thank you very much for this explanation .
This question raised in mind when security person was fitting spark arrestor ( they called it as a Dholki/Mufler etc.) to one vehicle entering into company.
Sir , I request you to guide us that is their any simple check point/Inhouse method to check the device ( spark arrestor & flame arrestor) is upto the mark or not ?
Regards,
Abhay
From India, Mumbai
Dear Kesava Sir
Can you guide me with a practical solution related to spark arrestors.
Normal practise in industries is that they make rules saying that all the vehicles with flammable chemicals / gases must be fit with spark arrestors. Some of the industries must be having a checklist as well and one of the check point would be this, whether the spark arrestor is fitted or not. That's the end.
Normally these checks are performed by security personals in most of the industries. They can visually check the presence of spark arrestors. But they cant check or judge whether its functioning or not? These kind of checking will just give a false sense of protection. So I am writing this query to get more understanding about it.
How we can check the spark arrestors for its effectiveness? What should be the best practical way of checking it or what should be the best practical way of suggesting to maintain the spark arrestors.
Hope to hear from you.
Thanks in advance.
From India
Can you guide me with a practical solution related to spark arrestors.
Normal practise in industries is that they make rules saying that all the vehicles with flammable chemicals / gases must be fit with spark arrestors. Some of the industries must be having a checklist as well and one of the check point would be this, whether the spark arrestor is fitted or not. That's the end.
Normally these checks are performed by security personals in most of the industries. They can visually check the presence of spark arrestors. But they cant check or judge whether its functioning or not? These kind of checking will just give a false sense of protection. So I am writing this query to get more understanding about it.
How we can check the spark arrestors for its effectiveness? What should be the best practical way of checking it or what should be the best practical way of suggesting to maintain the spark arrestors.
Hope to hear from you.
Thanks in advance.
From India
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