Under what conditions can large centrifugal compressors be operated without anti-surge control?
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I heard that when the compression ratio is not high, there is no need to install anti-surge control for centrifugal compressors. I don’t understand. May I ask the teachers: is it necessary to install anti-surge control for centrifugal compressors? If not, under what circumstances can anti-surge control be omitted?
I have only heard that the cycle hydrogen compressors in catalytic reforming units do not have anti-surge lines.
As long as it is a centrifugal compressor, surge protection is necessary
So, is there any teacher who specializes in catalytic reforming who can explain why the recycle hydrogen compressor is not equipped with anti-surge measures?
To maintain a certain flow rate of recycled hydrogen in the catalytic reforming reaction system, this can be achieved by using the hydrogen produced during reforming, without the need for surge control valves; this is my understanding – experts, please add to it.
Unless flow regulation is not required, if the flow rate is not adjusted, surge will not occur, and therefore there is no need to install a surge valve
I’m not sure what the process for the circulating hydrogen compressor is like, as you mentioned. From the literal meaning of the word “cycle,” I understand it to mean that he has large return pipelines; if such return pipelines exist, they can also be considered surge pipelines, only the connection point to the compressor’s surge pipeline is different.
Theoretically, it is possible, as long as the air supply volume remains above the anti-stall flow rate. Additionally, during start-up and shutdown, as well as when adjusting speed, a vent valve must be installed to maintain flow rate. In the event of failures in upstream or downstream processes, it should also open via interlocking to ensure the safety of the equipment.
This post was last edited by lshx888 on 2017-8-7 at 15:41. A cycle compressor is a device that repressurizes the gas from the outlet (synthesis) tower, from which the product has been separated; this gas then merges with fresh raw material gas before being sent back into the tower to synthesize more product.