What does purging mean in the sentence?

Search for magnitude of the exotherm and discuss it N times.

In order to control the magnitude of the exotherm, the Ethylene Treater is filled in stages by purging at low pressure with a stream of ethylene diluted with nitrogen. Nitrogen is used for cooling, right? This post was last edited by winniebear on 2009-2-11 15:18 ]

To control the heat release, the ethylene processor is filled with a stream of nitrogen-diluted ethylene:victory:.

“"Purge" seems to be OK. Generally, it says "flush" for liquids and "purge" for gases. Similar to FLUSH. “. . . Purge with ethylene diluted with nitrogen at low pressure." How do you understand AT STAGES specifically? This post was last edited by RainWolf on 2009-2-11 15:36 ]

Agree to use "purge" stage: stage? part? Can it be translated into purge section?

Why do I always think that filling means filling materials, and replacing means replacing materials. Installing catalysts is generally called loading, but replacing does also mean replacing. If it is replaced, it is impossible to feed the material immediately. In the meantime, the feed port needs to be sealed, the pressure tested, and then nitrogen replaced, material replaced, etc. I don't know as much about this specific device as the original poster, but in view of the importance of this issue, I would like to share my thoughts. According to the above sentence, it seems that filling and purging are carried out at the same time. Unless the powder is filled by pneumatic conveying, mechanical filling is unlikely to be like this. In fact, it is not a question of English, it mainly depends on the understanding of craftsmanship.

I guess the theme here is to prevent the exotherm from being too intense by controlling the ethylene concentration and the rate of addition (at stages, not all at once). If I can't understand the addition of powder, maybe the process is very special. Low pressure has the same purpose, and the total pressure cannot be too high. The purpose of dilution is to reduce the ethylene partial pressure. This post was last edited by RainWolf on 2009-2-11 16:14 ]

In order to control the magnitude of the exotherm, the Ethylene Treater is filled in stages by purging at low pressure with a stream of ethylene diluted with nitrogen. illustrate: Nitrogen is inert and unreactive, and adding nitrogen to the ethylene feed will reduce the heat release.

Yes, and nitrogen can also act as a heat carrier to carry out heat.

The discussion I mentioned about fill and replace is mainly related to this post ( http://bbs.hcbbs.com/thread-387100-1-1.html ), as evidenced by the use of fill here. Because this involves understanding the entire operation steps, I specifically remind the author to check it. After all I'm just guessing. The role of N2 as an inert gas is: 1 Partial pressure of reactant ethylene (volume fraction * total pressure), thereby reducing the heat release of the reaction. 2 Use its own heat capacity to assist in carrying heat. This post was last edited by RainWolf on 2009-2-11 17:08 ]

In the final stage of filling, the treater is purged with 100% ethylene. At that time the treater is considered filled and can be pressurized to full operating pressure and placed on-line. 100% ethylene is also purge. Should the process of purging the mixture of ethylene and nitrogen be completed at the same time?

Ethylene Treater must be a device for processing ethylene. I guess this thing is similar to a dehydrated molecular sieve. When driving when encountering high concentrations of ethylene, it will release a lot of heat (heat of adsorption? ), so when driving, you must first pass in nitrogen containing ethylene, increase the ethylene concentration little by little, and finally you can take over pure ethylene.

in order to control the magnitude of the exotherm, the Ethylene Treater is filled in stages by purging at low pressure with a stream of ethylene diluted with nitrogen. Here is my translation: In order to control the amount of heat release, low-pressure ethylene diluted with nitrogen is blown into the ethylene processor and filled into all layers of the processor.

The translation echo has basically given the correct answer. Let's just discuss the process. I guess it is the process of putting the ethylene refining bed (or processor, which should be used for refining ethylene) back into use after regeneration. Generally, there is an adsorbent in the refining bed. The adsorbent needs to be regenerated with hot nitrogen after a period of use. When it is put back into use after regeneration, the refining bed must be completely filled with process medium. This process is usually called "bed filling". In this process, due to the It often contains a certain amount of impurities. When the impurities are adsorbed by the adsorbent, they will release heat. If the heat released is too large, it may cause damage to the adsorbent. For this reason, the bed filling operation process needs to be strictly controlled and carried out gradually and slowly to avoid adverse effects on the equipment and adsorbent. The sentence translated here is a solution to this problem: Under low pressure, the bed is filled in stages with ethylene diluted with nitrogen to ensure that the heat release during the bed filling operation will not be too large.

Back to the topic, why is the word purging used here? A direct free translation?

The most direct understanding is to vent gas.

Because it turns out there is something else inside, and by gradually increasing the ethylene concentration to "purge" it, it is discharged.