Questions about nitrogen compressors
Thread Content
The air separation unit is intended to pressurize and transport low-pressure nitrogen, with an inlet pressure of 20 KP, an outlet pressure of 3.0 MPa, and a flow rate of 30,000 Nm3. Considering the use of reciprocating compressors for the power plant’s excess electricity utilization plan, how many compression stages are required, and how is this determined? Are there any successful cases around me? I hope experienced experts can give some advice!
Find a design institute to do the design for you, or consult with a manufacturer
This post was last edited by CHANGBAISHI on 2022-9-14 07:21. For this type of application, it is better to consider turbine compressors – they have a long operating life, stable performance, require little space, and basically need no maintenance. Due to the characteristics of reciprocating compressors, regular maintenance is essential; coupled with the impact on the power grid, it is best not to choose them. Furthermore, determining these levels isn’t just a simple calculation; it is also subject to various constraints such as whether the various mechanical structures can be manufactured or not. For reference.
I’ve learned something – the management considers things from an investment perspective!
For a flow rate of 30,000 Nm3, a centrifugal compressor is a good choice. The compression ratio is 3.0 / 0.12 = 25. Nitrogen has a relatively high heat capacity ratio of k = Cp/Cv, which results in a significant increase in compression temperature; therefore, four-stage compression is estimated to be necessary. Tell the management that maintaining reciprocating compressors and replacing their wear parts also costs money; it’s better to go for a solution that saves hassle from the start!
The gas volume is too small; the centrifuge is not suitable
You can contact the manufacturer for inquiries; after all, this isn’t something we can choose at will
Give me the process conditions and I can solve it.
Find a compressor manufacturer to do the calculations for you and check the performance records of that model