For the 180 air separation unit, the compressors have been replaced with centrifugal types; how to address the issue of sealing air for startup?
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Originally, oil-injected screw air compressors were used for air separation, but due to oil leakage, they were replaced with centrifugal air compressors. The factory doesn’t have any gauge air compressors available; how can we solve the issue of sealing air needed to start the centrifugal air compressor? Urgent!
Vaporize with liquid nitrogen, and switch back after it’s turned on.
Agree with what was said above; a low-pressure nitrogen line can be introduced through the backup nitrogen pipeline network
The oxygen-enriched gas production capacity of 180 is less than 1,200 standard cubic meters, right? Can there be a centrifuge this small?
Make a temporary nitrogen manifold; switch it once it’s in use
We used a mobile piston air compressor to supply temporary instrument air, and it was turned off once operation was normal. Does the 180 model used by the poster for air separation employ PSA nitrogen generation?
The poster is using a screw compressor; it is likely part of a small air separation unit. For such centrifugal compressors, there is no need to provide an external source of sealing gas~~
If the gas consumption is low, use a nitrogen cylinder; connecting several together ensures stable pressure. . Or spend some money on a small screw compressor; it’s not expensive, so let’s buy one and use it
Nitrogen yield: over 3,000 units
Initially, a small piston pump can be used as a substitute; once the equipment is operating properly, that will be sufficient. It is also possible to use a separate nitrogen supply for instrument air, which yields better results.
What a centrifugal compressor needs is an instrument air source for the vent valve, right? Either nitrogen or dry air can be used.