Turbo compressor

[moud]

To produce a lot of nitrogen by air separation I need a lot of compressed air. Turbo compressor are relative small and produces no oil. These benefits I want to use, but how sentive are these turbo's for vibrations? They will be placed on ships. Needed is a range from 1000-8000 m3/h
Is it a wise thing to do it with Turbo's? Does anyone have some experience about this matter.

 

[pmover]

fyi . . .

there are techniques & equipment available for isolating turbo-machinery from other induced vibrations. good design practices must be considered as well when addressing the process connections to the turbo-machinery as well. certainly make the mfg of turbo-machinery aware of any potential induced vibrations and solicit mfg recommendations for any limitations. the housing or shell casing of turbo-machinery may need to be designed for any induced vibrations.

my opinion, yes turbo-machinery are advantageous for shipboard use in that the power-weight ratio, quality of n2 delivered, simplicity of equipment, maintenance, etc. are exceptional.

hope this helps.
good luck!
-pmover

 

[cryotechnic]

Do you need 1000-8000Nm3/h of air or do you need that in N2? And what purity N2 do you need?

Allthough turbo's are sensitive for vibrations, I think with good housing, and when you tell you mfg that you expect some vibrations, it won't be a big problem.

But there are also some other type's of compressors that can produce oilfree (or when you use a good oil/water separator) that you can use.
It depends also on the type of process (cryo, membrane, PSA) what type compressor is the best for you.

Good luck
Cryotechnic

"Math is the ruler of your potential succes...."

 

[Montemayor]

moud:

I don't know what your experience is in air separation units and their history, but the basic idea that you're putting forward is nothing new or novel. I don't say this to put your idea in bad light; rather, to show that the application is not far-fetched but very feasible. As far back as the 1970 -1980's a lot of work was done on ship - or barge- mounted ammonia plants which were based on centrifugal trains. Some of these units were proposed on the Braun process - which also employed air separation for the Nitrogen raw material to the ammonia unit.

What is your specific application? Why do you mention a range? Don't you have a fixed capacity? Or is this a conceptual idea and you're contemplating a range? The lower part of your range is a little small for centrifugals.

By "turbocompressor", do you mean a type of centrifugal or do you mean a gas turbine-driven centrifugal?

 

[moud]

My experience is a long time doing the commissioning of Nitrogen plants on ships. Always moisture and oil problems. The oil problem will be avoided if you use oil-free centrifugal compressors (Turbo compressor). The membrane separation process can do the job without the carbon bed. The moisture problem can be solved by refrigeration dryer. The space problem will also be less if you use a turbo compressor. The large amount of air needed, is not a problem for turbo compressors. Al those benefits are important running a plant on a ship. But the vibrations and movement of the ship at high sea, is that a problem for the turbo compressor? We want to make several different capacity’s skids. That’s why there is a range in air supply. In the past we have used normal oil injected compressors, with al lot of problems.
Does anybody know if there are turbo compressors used on ships? You can make calculations, but practice is for me more important. If someone has experience, which brand of compressor was used? Did you use special dampers underneath the compressor? Which one etc.. Compressor manufactures want to sell and are sometimes very optimistic about their product.

I hope that this has clarified the issue.

 

[0279]

HI
I WANT INFORMATION ABOUT INCREASES EFFICIENCY IN TURBO AIR COMPRESSORS.