How to understand \"defeat the purpose of flaring\" (in ethylene glycol production)?
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This post was last edited by echommm on 2010-8-24 at 11:28. In the event of emergency venting when the Recycle Compressor trips, the cycle gas is vented for 90 seconds to remove high concentrations of oxygen. Since this is a potentially explosive gas mixture, it is not appropriate to feed this gas into a header system or mix it with any other process vents; therefore, it is vented directly to the atmosphere. If a header system were used, it would need to be protected by a rupture disk, which would undermine the purpose of venting the gas through flaring in the first place. Since this is a potentially explosive mixture, it is not desirable to release this gas into the main pipeline system or mix it with any other process emissions; therefore, it must be vented into the atmosphere. If it is a main pipeline system that needs to be drained, a rupture disc must be used for protection; what will the rupture disc do? ? ? ? ? ? . Help with understanding the sentence in red (or its translation):dizzy: :dizzy:
In the case of a header system…… Does this refer to “if the main pipe system needs to discharge” or “if discharging into the main pipe system”?
In the case of a header system, it would have to be protected by a rupture disk, which would defeat the purpose of flaring the stream in the first place. To protect the main pipe system, a rupture disk must be installed, in order to.......
The first half of the text states that this type of waste material is generally not discharged into the main pipeline; therefore, in the case of a header system, it should be… In the case of a header system, it would need to be protected by a rupture disk, which would defeat the purpose of venting the material through flaring in the first place. A possible translation for this sentence is: If the material is to be discharged into the main pipeline, then the pipeline must be protected by a rupture disk, which would activate before the material is vented through flaring (Feel free to correct me)
Firstly, it implies a sense of priority or order of precedence; to defeat or thwart something means to prevent it from happening. In other words, it is necessary to use blast valves for protection, in order to first eliminate the possibility of steam causing damage. In the first place, it should not modify the phrase \"it would be protected by a rupture disk\"; rather, it modifies the subordinate clause \"which\" that follows.
This post was last edited by isan on 2010-8-23 14:14, defeating the purpose of flaring the stream in the first place; the rupture disc can prevent sudden changes in the parameters of the fluid flow right away. Just try :)
Let me share my understanding; to quote a famous saying to avoid criticism: it’s the participation that matters. Regarding a rupture disk that would undermine the purpose of flaring the stream in the first place, as long as this rupture disk is installed, the possibility of flaring the stream is eliminated from the start.
Haha, haha, let me say a few words then. The vent main refers to the fact that there are three devices here that have venting systems; the vent gases from all three devices are connected to a single main pipe, which in turn is connected to the atmosphere. This is what is meant by a header system. Recycle (syngas recycle gas compressor): This interlock on the compressor is designed to prevent an excessive oxygen concentration; if the oxygen concentration exceeds 4%, the system will vent for 90 seconds. But after all, it is an explosive gas (it contains oxygen); if oxygen is introduced into the main pipeline and mixed with other flammable gases, that is very dangerous. Additionally, it is not desired for flammable or explosive vent gases to be released directly into the atmosphere, as this could lead to excessive levels of CO; therefore, it may be necessary to ignite these gases using a flare. Therefore, in the case of a main pipeline system, it is necessary to consider equipping it with shrapnel to protect the venting system. The meaning of \"defeat\" is that under normal conditions, the system’s function is to allow for venting; but in emergency situations (when the system experiences overheating or overpressure), there’s no time for venting – explosion becomes the only option. PS, there’s one thing I’m not quite sure about here: it’s true that “flare” means to vent gas, but I’m not certain whether it also implies lighting something up.
The purpose of the burst disc is to prevent circulating gas from entering the main pipeline system as quickly as possible. For reference only!
In the case of a header system, it would have to be protected by a rupture disk, which would defeat the purpose of flaring the stream in the first place. Another question: in an emergency, should it be vented to the atmosphere or flared? How to translate the sentence in red?
It would be clear if there were a flowchart. I think it is: if it is discharged into the main pipe, the rupture disc will protect the system when the gas catches fire.