Function and principle of air booster
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In large air separation units, many processes feature a design in which air compressors and pressure boosters work in a one-to-two configuration. What are the functions and principles of air pressure boosters? I hope for more details. Thank you. This post was last edited by lsx-tzq on 2008-5-20 12:10.]
Pressurization is used to increase the pressure before the expander, thereby achieving a higher expansion ratio and obtaining more cooling capacity. This is basically done in two ways: 1) by using the expander to drive the fan for pressurization, and 2) by using a compressor
Another function of the booster in the internal compression process is to supply high-pressure air for heat exchange with liquid oxygen, thereby balancing the temperature difference and recovering cold energy
Pressurization enhances the performance of the expansion turbine, providing more cooling capacity for the system.
In most large internal compression air separation units, the air compressors and boosters are designed as a one-to-two configuration, with one turbine (prime mover) driving two compressors, which saves a lot in terms of design, installation, and plant layout. Of course, the setup of the booster is determined by the principles of internal compression air separation units – specifically, the issue of high-pressure heat exchange. It is necessary to organize the heat exchange system in a proper way, so as to convert as much of the low-temperature cooling capacity of high-pressure liquid oxygen into the low-temperature cooling capacity of high-pressure air of equal mass, while minimizing irreversible losses and thus reducing the energy consumption of the unit ； If a medium-pressure expander is used, the air can also be expanded and sent to the lower column, thereby improving the extraction efficiency of the unit.
In non-internally compressing processes, pressurization is achieved solely through expanders; there are also many cases where pressurization is accomplished at the fan end. Using this method, a pressure increase of 2–3 bar can also be achieved
The answers given by those who responded before are all reasonable; I’ll think about it for another couple of days to see if they missed anything. I’m the one who caused you trouble; I apologize here, please forgive me. :)
:Lol, it’s me from floor 7 – I was the one who caused you trouble. I’m apologizing here; please forgive me. ” Hehe :lol What does this mean?
How is it that good books can’t be downloaded at all?
The air booster also has an issue related to compatibility with the main air compressor; in the past, domestic air compressors used imported ones precisely because the poor compatibility between these two types of units led to poor stability. Generally, air boosters are only used in compression processes with air circulation; this is because oxygen is first pressurized in an liquid oxygen pump, and only then is the heat recovered. According to the design principles of heat exchangers, there must be a certain pressure level for the hot air (forward-flowing gas) in order to maximize heat recovery and reduce the temperature difference at the hot side. During further internal compression, due to the presence of air at a higher pressure level, using medium-pressure expansion not only reduces the amount of expansion but also allows the expanded gas to be sent to the lower tower, thereby increasing the gas extraction rate; these factors also lead to reduced energy consumption. With external compression, there is no such thing as an air booster.
Great stuff! Thank you to all the experts upstairs.
I see, thanks to all the experts up there