Difference between circulation machines and new hydrogen generators
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Today I suddenly thought of a question: in hydrogenation units, why is a centrifugal compressor used for the recycled hydrogen, while a reciprocating compressor is used for the fresh hydrogen?
New hydrogen, however, uses reciprocating compressors—can they operate intermittently?
May I ask the original poster, what kind of hydrogenation equipment do you have, and what is its production capacity?
The new hydrogen compressor is required to raise the pressure of fresh hydrogen from around 13–22 to 100–120 kg/cm2; given its high compression ratio, it is suitable for use with reciprocating compressors. In contrast, the cycle hydrogen compressor has a lower compression ratio but a higher flow rate, making it appropriate for use with centrifugal compressors. These are all determined by the characteristics of centrifuges and reciprocating machines.
The compressor for circulating hydrogen can also be a reciprocating compressor; my unit uses a reciprocating one.
Not necessarily; in some places, the hydrogen circulation pumps are reciprocating, and this is related to the system pressure and capacity. New hydrogen compressors have a high reciprocating compression ratio; the compression at the inlet and outlet for hydrogen circulation is lower, but the volume of hydrogen circulated is large. Some systems also use reciprocating compressors, which usually consist of two units. In such systems, it is possible to switch to another unit if there is a problem with the hydrogen compressor. Centrifuges driven by turbines, on the other hand, can only stop operating once they are shut down
This is related to the flow rate of the recycled hydrogen and the required compression ratio. If the amount of circulating hydrogen is low, a reciprocating machine can also be used for the circulator. New hydrogen compressors generally require higher compression, while centrifugal compressors typically offer lower compression but a higher flow rate. Therefore, reciprocating machines are generally used for new hydrogen generators.
The type of compressor used is related to the volume and compression ratio; cycle hydrogen compressors have a large volume and a low compression ratio. The new hydrogen engine has a small capacity but a high compression ratio.
It is determined by your process: new hydrogen compressors have a relatively high compression ratio, making reciprocating compressors suitable for use in such applications. On the other hand, cycle hydrogen compressors have a lower compression ratio but a higher flow rate, which makes centrifugal compressors more appropriate. In some processes, reciprocating compressors are also used for cycle machines; this is because the amount of cycle hydrogen is small while the consumption of new hydrogen is high, and the pressure of the new hydrogen is low as well, so reciprocating compressors are employed in those cases. All of these are determined by the centrifuge and reciprocating machine, as well as the process conditions.
It might be because the centrifuge has a high circulation rate and a low compression ratio, making it more economical. Reciprocating compressors have a high compression ratio, right? Our devices are all reciprocating machines