Is there any compressor that can achieve this?
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It is applied at the top of the distillation column to compress the vapor at the top, creating a vacuum on one side (enabling negative pressure operation of the distillation column) while compressing the vapor on the other side. Is there such a compressor? The distillation towers currently in use all operate at atmospheric pressure. However, I’ve found that operating under negative pressure would yield much better results, as the equipment following it needs to function at a absolute pressure of 2 atmospheres; therefore, pressurization is necessary. Last edited by 1:00 a.m on 2009-4-8 22:12.]
When a low negative pressure is required, a fan can be used with a duct; in this case, a cooler can be employed to condense the steam into water, thereby achieving the desired negative pressure as well. I just don’t know what the negative pressure level required by the landlord is. (For reference)
Such compressors can be found everywhere; of course, the best ones are screw compressors, which are perfectly suitable for the operating conditions mentioned by the original poster
Such compressors definitely exist; otherwise, how could negative pressure be generated? But if a lower negative pressure is required, a compressor may not be necessary.
Regarding what LZ mentioned about the top of the distillation tower – compressing the steam at the top of the tower so that a vacuum is created on one side (enabling negative pressure operation in the distillation tower) while the steam on the other side is compressed – ordinary compressors can perform this function. If you’re not sure which compressor to choose, you can simply do some research to find out.
I admire the original poster’s imagination; such a compressor theory seems capable of enabling this kind of operation, but I’ve never seen it used in practice. Also, the condensate water generated during the vacuuming and compression processes is difficult to handle.
It is achievable; it mainly depends on the required negative pressure by the user, as well as the pressure level at the output end after compression. It also depends on whether the compressed steam is to be reused or discarded directly.
Negative pressure is generally generated by vacuum pumps. However, if steam is directly extracted from the top of the tower, vacuum pumps cannot be used, as they require that as much of the vapor at the tower top as possible be condensed, with as little non-condensable gas as possible. I have not found any literature evidence regarding the use of compressors to create negative pressure; I’m not sure whether this is feasible. Since the operating pressure of the equipment downstream is relatively high, I was thinking that if a compressor could perform these two functions, it would solve two problems at once. I would appreciate it if those with practical experience could advise me – examples or evidence would be very helpful. Thank you: handshake
Can all of it be achieved? I can’t find a single literature article at all. Could you please recommend some examples?
It is mainly to obtain high-pressure steam before it enters the subsequent equipment; the pressure ahead is usually at atmospheric level, but better results are achieved under negative pressure, which means there is no need for expensive compressors
When evacuating, there should not be too much non-condensable gas; generally, it is required that everything at the top of the tower be condensed. I cannot use the evacuation method here – what I need is a slight increase in pressure, as this will prevent liquefaction
Current distillation towers generally operate at atmospheric pressure, while subsequent units work at 2 atmospheres of pressure. It would be ideal if the distillation tower could operate at a absolute pressure of 0.5 atmospheres, with the vapor pressure at the top of the tower reaching 2 atmospheres. Is this achievable?